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-rw-r--r--net/wireless/core.c1763
1 files changed, 1763 insertions, 0 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c
new file mode 100644
index 000000000..8809e668e
--- /dev/null
+++ b/net/wireless/core.c
@@ -0,0 +1,1763 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This is the linux wireless configuration interface.
+ *
+ * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2013-2014 Intel Mobile Communications GmbH
+ * Copyright 2015-2017 Intel Deutschland GmbH
+ * Copyright (C) 2018-2022 Intel Corporation
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/if.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/nl80211.h>
+#include <linux/debugfs.h>
+#include <linux/notifier.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/sched.h>
+#include <net/genetlink.h>
+#include <net/cfg80211.h>
+#include "nl80211.h"
+#include "core.h"
+#include "sysfs.h"
+#include "debugfs.h"
+#include "wext-compat.h"
+#include "rdev-ops.h"
+
+/* name for sysfs, %d is appended */
+#define PHY_NAME "phy"
+
+MODULE_AUTHOR("Johannes Berg");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("wireless configuration support");
+MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
+
+/* RCU-protected (and RTNL for writers) */
+LIST_HEAD(cfg80211_rdev_list);
+int cfg80211_rdev_list_generation;
+
+/* for debugfs */
+static struct dentry *ieee80211_debugfs_dir;
+
+/* for the cleanup, scan and event works */
+struct workqueue_struct *cfg80211_wq;
+
+static bool cfg80211_disable_40mhz_24ghz;
+module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
+MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
+ "Disable 40MHz support in the 2.4GHz band");
+
+struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
+{
+ struct cfg80211_registered_device *result = NULL, *rdev;
+
+ ASSERT_RTNL();
+
+ list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
+ if (rdev->wiphy_idx == wiphy_idx) {
+ result = rdev;
+ break;
+ }
+ }
+
+ return result;
+}
+
+int get_wiphy_idx(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ return rdev->wiphy_idx;
+}
+
+struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
+{
+ struct cfg80211_registered_device *rdev;
+
+ ASSERT_RTNL();
+
+ rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
+ if (!rdev)
+ return NULL;
+ return &rdev->wiphy;
+}
+
+static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
+ const char *newname)
+{
+ struct cfg80211_registered_device *rdev2;
+ int wiphy_idx, taken = -1, digits;
+
+ ASSERT_RTNL();
+
+ if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
+ return -EINVAL;
+
+ /* prohibit calling the thing phy%d when %d is not its number */
+ sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
+ if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
+ /* count number of places needed to print wiphy_idx */
+ digits = 1;
+ while (wiphy_idx /= 10)
+ digits++;
+ /*
+ * deny the name if it is phy<idx> where <idx> is printed
+ * without leading zeroes. taken == strlen(newname) here
+ */
+ if (taken == strlen(PHY_NAME) + digits)
+ return -EINVAL;
+ }
+
+ /* Ensure another device does not already have this name. */
+ list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
+ if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
+ char *newname)
+{
+ int result;
+
+ ASSERT_RTNL();
+
+ /* Ignore nop renames */
+ if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
+ return 0;
+
+ result = cfg80211_dev_check_name(rdev, newname);
+ if (result < 0)
+ return result;
+
+ result = device_rename(&rdev->wiphy.dev, newname);
+ if (result)
+ return result;
+
+ if (!IS_ERR_OR_NULL(rdev->wiphy.debugfsdir))
+ debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
+ rdev->wiphy.debugfsdir,
+ rdev->wiphy.debugfsdir->d_parent, newname);
+
+ nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
+
+ return 0;
+}
+
+int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
+ struct net *net)
+{
+ struct wireless_dev *wdev;
+ int err = 0;
+
+ if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
+ return -EOPNOTSUPP;
+
+ list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
+ if (!wdev->netdev)
+ continue;
+ wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
+ err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
+ if (err)
+ break;
+ wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
+ }
+
+ if (err) {
+ /* failed -- clean up to old netns */
+ net = wiphy_net(&rdev->wiphy);
+
+ list_for_each_entry_continue_reverse(wdev,
+ &rdev->wiphy.wdev_list,
+ list) {
+ if (!wdev->netdev)
+ continue;
+ wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
+ err = dev_change_net_namespace(wdev->netdev, net,
+ "wlan%d");
+ WARN_ON(err);
+ wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
+ }
+
+ return err;
+ }
+
+ list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
+ if (!wdev->netdev)
+ continue;
+ nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
+ }
+ nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
+
+ wiphy_net_set(&rdev->wiphy, net);
+
+ err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
+ WARN_ON(err);
+
+ nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
+ list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
+ if (!wdev->netdev)
+ continue;
+ nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
+ }
+
+ return 0;
+}
+
+static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
+{
+ struct cfg80211_registered_device *rdev = data;
+
+ wiphy_lock(&rdev->wiphy);
+ rdev_rfkill_poll(rdev);
+ wiphy_unlock(&rdev->wiphy);
+}
+
+void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev)
+{
+ lockdep_assert_held(&rdev->wiphy.mtx);
+
+ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
+ return;
+
+ if (!wdev_running(wdev))
+ return;
+
+ rdev_stop_p2p_device(rdev, wdev);
+ wdev->is_running = false;
+
+ rdev->opencount--;
+
+ if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
+ if (WARN_ON(!rdev->scan_req->notified &&
+ (!rdev->int_scan_req ||
+ !rdev->int_scan_req->notified)))
+ rdev->scan_req->info.aborted = true;
+ ___cfg80211_scan_done(rdev, false);
+ }
+}
+
+void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev)
+{
+ lockdep_assert_held(&rdev->wiphy.mtx);
+
+ if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
+ return;
+
+ if (!wdev_running(wdev))
+ return;
+
+ rdev_stop_nan(rdev, wdev);
+ wdev->is_running = false;
+
+ rdev->opencount--;
+}
+
+void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ struct wireless_dev *wdev;
+
+ ASSERT_RTNL();
+
+ list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
+ if (wdev->netdev) {
+ dev_close(wdev->netdev);
+ continue;
+ }
+
+ /* otherwise, check iftype */
+
+ wiphy_lock(wiphy);
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_P2P_DEVICE:
+ cfg80211_stop_p2p_device(rdev, wdev);
+ break;
+ case NL80211_IFTYPE_NAN:
+ cfg80211_stop_nan(rdev, wdev);
+ break;
+ default:
+ break;
+ }
+
+ wiphy_unlock(wiphy);
+ }
+}
+EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
+
+static int cfg80211_rfkill_set_block(void *data, bool blocked)
+{
+ struct cfg80211_registered_device *rdev = data;
+
+ if (!blocked)
+ return 0;
+
+ rtnl_lock();
+ cfg80211_shutdown_all_interfaces(&rdev->wiphy);
+ rtnl_unlock();
+
+ return 0;
+}
+
+static void cfg80211_rfkill_block_work(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+ rfkill_block);
+ cfg80211_rfkill_set_block(rdev, true);
+}
+
+static void cfg80211_event_work(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+ event_work);
+
+ wiphy_lock(&rdev->wiphy);
+ cfg80211_process_rdev_events(rdev);
+ wiphy_unlock(&rdev->wiphy);
+}
+
+void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
+{
+ struct wireless_dev *wdev, *tmp;
+
+ ASSERT_RTNL();
+
+ list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
+ if (wdev->nl_owner_dead) {
+ if (wdev->netdev)
+ dev_close(wdev->netdev);
+
+ wiphy_lock(&rdev->wiphy);
+ cfg80211_leave(rdev, wdev);
+ cfg80211_remove_virtual_intf(rdev, wdev);
+ wiphy_unlock(&rdev->wiphy);
+ }
+ }
+}
+
+static void cfg80211_destroy_iface_wk(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+ destroy_work);
+
+ rtnl_lock();
+ cfg80211_destroy_ifaces(rdev);
+ rtnl_unlock();
+}
+
+static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+ struct cfg80211_sched_scan_request *req, *tmp;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+ sched_scan_stop_wk);
+
+ wiphy_lock(&rdev->wiphy);
+ list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
+ if (req->nl_owner_dead)
+ cfg80211_stop_sched_scan_req(rdev, req, false);
+ }
+ wiphy_unlock(&rdev->wiphy);
+}
+
+static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+ propagate_radar_detect_wk);
+
+ rtnl_lock();
+
+ regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
+ NL80211_DFS_UNAVAILABLE,
+ NL80211_RADAR_DETECTED);
+
+ rtnl_unlock();
+}
+
+static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(work, struct cfg80211_registered_device,
+ propagate_cac_done_wk);
+
+ rtnl_lock();
+
+ regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
+ NL80211_DFS_AVAILABLE,
+ NL80211_RADAR_CAC_FINISHED);
+
+ rtnl_unlock();
+}
+
+static void cfg80211_wiphy_work(struct work_struct *work)
+{
+ struct cfg80211_registered_device *rdev;
+ struct wiphy_work *wk;
+
+ rdev = container_of(work, struct cfg80211_registered_device, wiphy_work);
+
+ wiphy_lock(&rdev->wiphy);
+ if (rdev->suspended)
+ goto out;
+
+ spin_lock_irq(&rdev->wiphy_work_lock);
+ wk = list_first_entry_or_null(&rdev->wiphy_work_list,
+ struct wiphy_work, entry);
+ if (wk) {
+ list_del_init(&wk->entry);
+ if (!list_empty(&rdev->wiphy_work_list))
+ schedule_work(work);
+ spin_unlock_irq(&rdev->wiphy_work_lock);
+
+ wk->func(&rdev->wiphy, wk);
+ } else {
+ spin_unlock_irq(&rdev->wiphy_work_lock);
+ }
+out:
+ wiphy_unlock(&rdev->wiphy);
+}
+
+/* exported functions */
+
+struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
+ const char *requested_name)
+{
+ static atomic_t wiphy_counter = ATOMIC_INIT(0);
+
+ struct cfg80211_registered_device *rdev;
+ int alloc_size;
+
+ WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
+ WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
+ WARN_ON(ops->connect && !ops->disconnect);
+ WARN_ON(ops->join_ibss && !ops->leave_ibss);
+ WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
+ WARN_ON(ops->add_station && !ops->del_station);
+ WARN_ON(ops->add_mpath && !ops->del_mpath);
+ WARN_ON(ops->join_mesh && !ops->leave_mesh);
+ WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
+ WARN_ON(ops->start_ap && !ops->stop_ap);
+ WARN_ON(ops->join_ocb && !ops->leave_ocb);
+ WARN_ON(ops->suspend && !ops->resume);
+ WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
+ WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
+ WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
+ WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
+
+ alloc_size = sizeof(*rdev) + sizeof_priv;
+
+ rdev = kzalloc(alloc_size, GFP_KERNEL);
+ if (!rdev)
+ return NULL;
+
+ rdev->ops = ops;
+
+ rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
+
+ if (unlikely(rdev->wiphy_idx < 0)) {
+ /* ugh, wrapped! */
+ atomic_dec(&wiphy_counter);
+ kfree(rdev);
+ return NULL;
+ }
+
+ /* atomic_inc_return makes it start at 1, make it start at 0 */
+ rdev->wiphy_idx--;
+
+ /* give it a proper name */
+ if (requested_name && requested_name[0]) {
+ int rv;
+
+ rtnl_lock();
+ rv = cfg80211_dev_check_name(rdev, requested_name);
+
+ if (rv < 0) {
+ rtnl_unlock();
+ goto use_default_name;
+ }
+
+ rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
+ rtnl_unlock();
+ if (rv)
+ goto use_default_name;
+ } else {
+ int rv;
+
+use_default_name:
+ /* NOTE: This is *probably* safe w/out holding rtnl because of
+ * the restrictions on phy names. Probably this call could
+ * fail if some other part of the kernel (re)named a device
+ * phyX. But, might should add some locking and check return
+ * value, and use a different name if this one exists?
+ */
+ rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
+ if (rv < 0) {
+ kfree(rdev);
+ return NULL;
+ }
+ }
+
+ mutex_init(&rdev->wiphy.mtx);
+ INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
+ INIT_LIST_HEAD(&rdev->beacon_registrations);
+ spin_lock_init(&rdev->beacon_registrations_lock);
+ spin_lock_init(&rdev->bss_lock);
+ INIT_LIST_HEAD(&rdev->bss_list);
+ INIT_LIST_HEAD(&rdev->sched_scan_req_list);
+ INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
+ INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
+ cfg80211_dfs_channels_update_work);
+#ifdef CONFIG_CFG80211_WEXT
+ rdev->wiphy.wext = &cfg80211_wext_handler;
+#endif
+
+ device_initialize(&rdev->wiphy.dev);
+ rdev->wiphy.dev.class = &ieee80211_class;
+ rdev->wiphy.dev.platform_data = rdev;
+ device_enable_async_suspend(&rdev->wiphy.dev);
+
+ INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
+ INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
+ INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
+ INIT_WORK(&rdev->propagate_radar_detect_wk,
+ cfg80211_propagate_radar_detect_wk);
+ INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
+ INIT_WORK(&rdev->mgmt_registrations_update_wk,
+ cfg80211_mgmt_registrations_update_wk);
+ spin_lock_init(&rdev->mgmt_registrations_lock);
+
+#ifdef CONFIG_CFG80211_DEFAULT_PS
+ rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
+#endif
+
+ wiphy_net_set(&rdev->wiphy, &init_net);
+
+ rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
+ rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
+ &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
+ &rdev->rfkill_ops, rdev);
+
+ if (!rdev->wiphy.rfkill) {
+ wiphy_free(&rdev->wiphy);
+ return NULL;
+ }
+
+ INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work);
+ INIT_LIST_HEAD(&rdev->wiphy_work_list);
+ spin_lock_init(&rdev->wiphy_work_lock);
+ INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
+ INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
+ INIT_WORK(&rdev->event_work, cfg80211_event_work);
+ INIT_WORK(&rdev->background_cac_abort_wk,
+ cfg80211_background_cac_abort_wk);
+ INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
+ cfg80211_background_cac_done_wk);
+
+ init_waitqueue_head(&rdev->dev_wait);
+
+ /*
+ * Initialize wiphy parameters to IEEE 802.11 MIB default values.
+ * Fragmentation and RTS threshold are disabled by default with the
+ * special -1 value.
+ */
+ rdev->wiphy.retry_short = 7;
+ rdev->wiphy.retry_long = 4;
+ rdev->wiphy.frag_threshold = (u32) -1;
+ rdev->wiphy.rts_threshold = (u32) -1;
+ rdev->wiphy.coverage_class = 0;
+
+ rdev->wiphy.max_num_csa_counters = 1;
+
+ rdev->wiphy.max_sched_scan_plans = 1;
+ rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
+
+ return &rdev->wiphy;
+}
+EXPORT_SYMBOL(wiphy_new_nm);
+
+static int wiphy_verify_combinations(struct wiphy *wiphy)
+{
+ const struct ieee80211_iface_combination *c;
+ int i, j;
+
+ for (i = 0; i < wiphy->n_iface_combinations; i++) {
+ u32 cnt = 0;
+ u16 all_iftypes = 0;
+
+ c = &wiphy->iface_combinations[i];
+
+ /*
+ * Combinations with just one interface aren't real,
+ * however we make an exception for DFS.
+ */
+ if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
+ return -EINVAL;
+
+ /* Need at least one channel */
+ if (WARN_ON(!c->num_different_channels))
+ return -EINVAL;
+
+ /* DFS only works on one channel. */
+ if (WARN_ON(c->radar_detect_widths &&
+ (c->num_different_channels > 1)))
+ return -EINVAL;
+
+ if (WARN_ON(!c->n_limits))
+ return -EINVAL;
+
+ for (j = 0; j < c->n_limits; j++) {
+ u16 types = c->limits[j].types;
+
+ /* interface types shouldn't overlap */
+ if (WARN_ON(types & all_iftypes))
+ return -EINVAL;
+ all_iftypes |= types;
+
+ if (WARN_ON(!c->limits[j].max))
+ return -EINVAL;
+
+ /* Shouldn't list software iftypes in combinations! */
+ if (WARN_ON(wiphy->software_iftypes & types))
+ return -EINVAL;
+
+ /* Only a single P2P_DEVICE can be allowed */
+ if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
+ c->limits[j].max > 1))
+ return -EINVAL;
+
+ /* Only a single NAN can be allowed */
+ if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
+ c->limits[j].max > 1))
+ return -EINVAL;
+
+ /*
+ * This isn't well-defined right now. If you have an
+ * IBSS interface, then its beacon interval may change
+ * by joining other networks, and nothing prevents it
+ * from doing that.
+ * So technically we probably shouldn't even allow AP
+ * and IBSS in the same interface, but it seems that
+ * some drivers support that, possibly only with fixed
+ * beacon intervals for IBSS.
+ */
+ if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
+ c->beacon_int_min_gcd)) {
+ return -EINVAL;
+ }
+
+ cnt += c->limits[j].max;
+ /*
+ * Don't advertise an unsupported type
+ * in a combination.
+ */
+ if (WARN_ON((wiphy->interface_modes & types) != types))
+ return -EINVAL;
+ }
+
+ if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
+ return -EINVAL;
+
+ /* You can't even choose that many! */
+ if (WARN_ON(cnt < c->max_interfaces))
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int wiphy_register(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ int res;
+ enum nl80211_band band;
+ struct ieee80211_supported_band *sband;
+ bool have_band = false;
+ int i;
+ u16 ifmodes = wiphy->interface_modes;
+
+#ifdef CONFIG_PM
+ if (WARN_ON(wiphy->wowlan &&
+ (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
+ !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
+ return -EINVAL;
+ if (WARN_ON(wiphy->wowlan &&
+ !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
+ !wiphy->wowlan->tcp))
+ return -EINVAL;
+#endif
+ if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
+ (!rdev->ops->tdls_channel_switch ||
+ !rdev->ops->tdls_cancel_channel_switch)))
+ return -EINVAL;
+
+ if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
+ (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
+ !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
+ !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
+ return -EINVAL;
+
+ if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
+ if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
+ !wiphy->pmsr_capa->ftm.non_asap))
+ return -EINVAL;
+ if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
+ !wiphy->pmsr_capa->ftm.bandwidths))
+ return -EINVAL;
+ if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
+ ~(BIT(NL80211_PREAMBLE_LEGACY) |
+ BIT(NL80211_PREAMBLE_HT) |
+ BIT(NL80211_PREAMBLE_VHT) |
+ BIT(NL80211_PREAMBLE_HE) |
+ BIT(NL80211_PREAMBLE_DMG))))
+ return -EINVAL;
+ if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
+ wiphy->pmsr_capa->ftm.non_trigger_based) &&
+ !(wiphy->pmsr_capa->ftm.preambles &
+ BIT(NL80211_PREAMBLE_HE))))
+ return -EINVAL;
+ if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
+ ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
+ BIT(NL80211_CHAN_WIDTH_20) |
+ BIT(NL80211_CHAN_WIDTH_40) |
+ BIT(NL80211_CHAN_WIDTH_80) |
+ BIT(NL80211_CHAN_WIDTH_80P80) |
+ BIT(NL80211_CHAN_WIDTH_160) |
+ BIT(NL80211_CHAN_WIDTH_5) |
+ BIT(NL80211_CHAN_WIDTH_10))))
+ return -EINVAL;
+ }
+
+ if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
+ (wiphy->regulatory_flags &
+ (REGULATORY_CUSTOM_REG |
+ REGULATORY_STRICT_REG |
+ REGULATORY_COUNTRY_IE_FOLLOW_POWER |
+ REGULATORY_COUNTRY_IE_IGNORE))))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy->coalesce &&
+ (!wiphy->coalesce->n_rules ||
+ !wiphy->coalesce->n_patterns) &&
+ (!wiphy->coalesce->pattern_min_len ||
+ wiphy->coalesce->pattern_min_len >
+ wiphy->coalesce->pattern_max_len)))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy->ap_sme_capa &&
+ !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy->addresses &&
+ !is_zero_ether_addr(wiphy->perm_addr) &&
+ memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
+ ETH_ALEN)))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy->max_acl_mac_addrs &&
+ (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
+ !rdev->ops->set_mac_acl)))
+ return -EINVAL;
+
+ /* assure only valid behaviours are flagged by driver
+ * hence subtract 2 as bit 0 is invalid.
+ */
+ if (WARN_ON(wiphy->bss_select_support &&
+ (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
+ return -EINVAL;
+
+ if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
+ (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
+ return -EINVAL;
+
+ if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
+ rdev->ops->update_connect_params))
+ return -EINVAL;
+
+ if (wiphy->addresses)
+ memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
+
+ /* sanity check ifmodes */
+ WARN_ON(!ifmodes);
+ ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
+ if (WARN_ON(ifmodes != wiphy->interface_modes))
+ wiphy->interface_modes = ifmodes;
+
+ res = wiphy_verify_combinations(wiphy);
+ if (res)
+ return res;
+
+ /* sanity check supported bands/channels */
+ for (band = 0; band < NUM_NL80211_BANDS; band++) {
+ u16 types = 0;
+ bool have_he = false;
+
+ sband = wiphy->bands[band];
+ if (!sband)
+ continue;
+
+ sband->band = band;
+ if (WARN_ON(!sband->n_channels))
+ return -EINVAL;
+ /*
+ * on 60GHz or sub-1Ghz band, there are no legacy rates, so
+ * n_bitrates is 0
+ */
+ if (WARN_ON((band != NL80211_BAND_60GHZ &&
+ band != NL80211_BAND_S1GHZ) &&
+ !sband->n_bitrates))
+ return -EINVAL;
+
+ if (WARN_ON(band == NL80211_BAND_6GHZ &&
+ (sband->ht_cap.ht_supported ||
+ sband->vht_cap.vht_supported)))
+ return -EINVAL;
+
+ /*
+ * Since cfg80211_disable_40mhz_24ghz is global, we can
+ * modify the sband's ht data even if the driver uses a
+ * global structure for that.
+ */
+ if (cfg80211_disable_40mhz_24ghz &&
+ band == NL80211_BAND_2GHZ &&
+ sband->ht_cap.ht_supported) {
+ sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+ sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
+ }
+
+ /*
+ * Since we use a u32 for rate bitmaps in
+ * ieee80211_get_response_rate, we cannot
+ * have more than 32 legacy rates.
+ */
+ if (WARN_ON(sband->n_bitrates > 32))
+ return -EINVAL;
+
+ for (i = 0; i < sband->n_channels; i++) {
+ sband->channels[i].orig_flags =
+ sband->channels[i].flags;
+ sband->channels[i].orig_mag = INT_MAX;
+ sband->channels[i].orig_mpwr =
+ sband->channels[i].max_power;
+ sband->channels[i].band = band;
+
+ if (WARN_ON(sband->channels[i].freq_offset >= 1000))
+ return -EINVAL;
+ }
+
+ for (i = 0; i < sband->n_iftype_data; i++) {
+ const struct ieee80211_sband_iftype_data *iftd;
+ bool has_ap, has_non_ap;
+ u32 ap_bits = BIT(NL80211_IFTYPE_AP) |
+ BIT(NL80211_IFTYPE_P2P_GO);
+
+ iftd = &sband->iftype_data[i];
+
+ if (WARN_ON(!iftd->types_mask))
+ return -EINVAL;
+ if (WARN_ON(types & iftd->types_mask))
+ return -EINVAL;
+
+ /* at least one piece of information must be present */
+ if (WARN_ON(!iftd->he_cap.has_he))
+ return -EINVAL;
+
+ types |= iftd->types_mask;
+
+ if (i == 0)
+ have_he = iftd->he_cap.has_he;
+ else
+ have_he = have_he &&
+ iftd->he_cap.has_he;
+
+ has_ap = iftd->types_mask & ap_bits;
+ has_non_ap = iftd->types_mask & ~ap_bits;
+
+ /*
+ * For EHT 20 MHz STA, the capabilities format differs
+ * but to simplify, don't check 20 MHz but rather check
+ * only if AP and non-AP were mentioned at the same time,
+ * reject if so.
+ */
+ if (WARN_ON(iftd->eht_cap.has_eht &&
+ has_ap && has_non_ap))
+ return -EINVAL;
+ }
+
+ if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
+ return -EINVAL;
+
+ have_band = true;
+ }
+
+ if (!have_band) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
+ /*
+ * Validate we have a policy (can be explicitly set to
+ * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
+ * we have at least one of doit/dumpit.
+ */
+ if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
+ return -EINVAL;
+ if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
+ !rdev->wiphy.vendor_commands[i].dumpit))
+ return -EINVAL;
+ }
+
+#ifdef CONFIG_PM
+ if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
+ (!rdev->wiphy.wowlan->pattern_min_len ||
+ rdev->wiphy.wowlan->pattern_min_len >
+ rdev->wiphy.wowlan->pattern_max_len)))
+ return -EINVAL;
+#endif
+
+ if (!wiphy->max_num_akm_suites)
+ wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES;
+ else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES ||
+ wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES)
+ return -EINVAL;
+
+ /* check and set up bitrates */
+ ieee80211_set_bitrate_flags(wiphy);
+
+ rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
+
+ rtnl_lock();
+ res = device_add(&rdev->wiphy.dev);
+ if (res) {
+ rtnl_unlock();
+ return res;
+ }
+
+ list_add_rcu(&rdev->list, &cfg80211_rdev_list);
+ cfg80211_rdev_list_generation++;
+
+ /* add to debugfs */
+ rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
+ ieee80211_debugfs_dir);
+
+ cfg80211_debugfs_rdev_add(rdev);
+ nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
+
+ /* set up regulatory info */
+ wiphy_regulatory_register(wiphy);
+
+ if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
+ struct regulatory_request request;
+
+ request.wiphy_idx = get_wiphy_idx(wiphy);
+ request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
+ request.alpha2[0] = '9';
+ request.alpha2[1] = '9';
+
+ nl80211_send_reg_change_event(&request);
+ }
+
+ /* Check that nobody globally advertises any capabilities they do not
+ * advertise on all possible interface types.
+ */
+ if (wiphy->extended_capabilities_len &&
+ wiphy->num_iftype_ext_capab &&
+ wiphy->iftype_ext_capab) {
+ u8 supported_on_all, j;
+ const struct wiphy_iftype_ext_capab *capab;
+
+ capab = wiphy->iftype_ext_capab;
+ for (j = 0; j < wiphy->extended_capabilities_len; j++) {
+ if (capab[0].extended_capabilities_len > j)
+ supported_on_all =
+ capab[0].extended_capabilities[j];
+ else
+ supported_on_all = 0x00;
+ for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
+ if (j >= capab[i].extended_capabilities_len) {
+ supported_on_all = 0x00;
+ break;
+ }
+ supported_on_all &=
+ capab[i].extended_capabilities[j];
+ }
+ if (WARN_ON(wiphy->extended_capabilities[j] &
+ ~supported_on_all))
+ break;
+ }
+ }
+
+ rdev->wiphy.registered = true;
+ rtnl_unlock();
+
+ res = rfkill_register(rdev->wiphy.rfkill);
+ if (res) {
+ rfkill_destroy(rdev->wiphy.rfkill);
+ rdev->wiphy.rfkill = NULL;
+ wiphy_unregister(&rdev->wiphy);
+ return res;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(wiphy_register);
+
+void wiphy_rfkill_start_polling(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ if (!rdev->ops->rfkill_poll)
+ return;
+ rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
+ rfkill_resume_polling(wiphy->rfkill);
+}
+EXPORT_SYMBOL(wiphy_rfkill_start_polling);
+
+void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev,
+ struct wiphy_work *end)
+{
+ unsigned int runaway_limit = 100;
+ unsigned long flags;
+
+ lockdep_assert_held(&rdev->wiphy.mtx);
+
+ spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
+ while (!list_empty(&rdev->wiphy_work_list)) {
+ struct wiphy_work *wk;
+
+ wk = list_first_entry(&rdev->wiphy_work_list,
+ struct wiphy_work, entry);
+ list_del_init(&wk->entry);
+ spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
+
+ wk->func(&rdev->wiphy, wk);
+
+ spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
+
+ if (wk == end)
+ break;
+
+ if (WARN_ON(--runaway_limit == 0))
+ INIT_LIST_HEAD(&rdev->wiphy_work_list);
+ }
+ spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
+}
+
+void wiphy_unregister(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ wait_event(rdev->dev_wait, ({
+ int __count;
+ wiphy_lock(&rdev->wiphy);
+ __count = rdev->opencount;
+ wiphy_unlock(&rdev->wiphy);
+ __count == 0; }));
+
+ if (rdev->wiphy.rfkill)
+ rfkill_unregister(rdev->wiphy.rfkill);
+
+ rtnl_lock();
+ wiphy_lock(&rdev->wiphy);
+ nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
+ rdev->wiphy.registered = false;
+
+ WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
+
+ /*
+ * First remove the hardware from everywhere, this makes
+ * it impossible to find from userspace.
+ */
+ debugfs_remove_recursive(rdev->wiphy.debugfsdir);
+ list_del_rcu(&rdev->list);
+ synchronize_rcu();
+
+ /*
+ * If this device got a regulatory hint tell core its
+ * free to listen now to a new shiny device regulatory hint
+ */
+ wiphy_regulatory_deregister(wiphy);
+
+ cfg80211_rdev_list_generation++;
+ device_del(&rdev->wiphy.dev);
+
+#ifdef CONFIG_PM
+ if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
+ rdev_set_wakeup(rdev, false);
+#endif
+
+ /* surely nothing is reachable now, clean up work */
+ cfg80211_process_wiphy_works(rdev, NULL);
+ wiphy_unlock(&rdev->wiphy);
+ rtnl_unlock();
+
+ /* this has nothing to do now but make sure it's gone */
+ cancel_work_sync(&rdev->wiphy_work);
+
+ flush_work(&rdev->scan_done_wk);
+ cancel_work_sync(&rdev->conn_work);
+ flush_work(&rdev->event_work);
+ cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
+ cancel_delayed_work_sync(&rdev->background_cac_done_wk);
+ flush_work(&rdev->destroy_work);
+ flush_work(&rdev->sched_scan_stop_wk);
+ flush_work(&rdev->propagate_radar_detect_wk);
+ flush_work(&rdev->propagate_cac_done_wk);
+ flush_work(&rdev->mgmt_registrations_update_wk);
+ flush_work(&rdev->background_cac_abort_wk);
+
+ cfg80211_rdev_free_wowlan(rdev);
+ cfg80211_rdev_free_coalesce(rdev);
+}
+EXPORT_SYMBOL(wiphy_unregister);
+
+void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
+{
+ struct cfg80211_internal_bss *scan, *tmp;
+ struct cfg80211_beacon_registration *reg, *treg;
+ rfkill_destroy(rdev->wiphy.rfkill);
+ list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
+ list_del(&reg->list);
+ kfree(reg);
+ }
+ list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
+ cfg80211_put_bss(&rdev->wiphy, &scan->pub);
+ mutex_destroy(&rdev->wiphy.mtx);
+
+ /*
+ * The 'regd' can only be non-NULL if we never finished
+ * initializing the wiphy and thus never went through the
+ * unregister path - e.g. in failure scenarios. Thus, it
+ * cannot have been visible to anyone if non-NULL, so we
+ * can just free it here.
+ */
+ kfree(rcu_dereference_raw(rdev->wiphy.regd));
+
+ kfree(rdev);
+}
+
+void wiphy_free(struct wiphy *wiphy)
+{
+ put_device(&wiphy->dev);
+}
+EXPORT_SYMBOL(wiphy_free);
+
+void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
+ enum rfkill_hard_block_reasons reason)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason))
+ schedule_work(&rdev->rfkill_block);
+}
+EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason);
+
+static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
+ bool unregister_netdev)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+ struct cfg80211_cqm_config *cqm_config;
+ unsigned int link_id;
+
+ ASSERT_RTNL();
+ lockdep_assert_held(&rdev->wiphy.mtx);
+
+ flush_work(&wdev->pmsr_free_wk);
+
+ nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
+
+ wdev->registered = false;
+
+ if (wdev->netdev) {
+ sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
+ if (unregister_netdev)
+ unregister_netdevice(wdev->netdev);
+ }
+
+ list_del_rcu(&wdev->list);
+ synchronize_net();
+ rdev->devlist_generation++;
+
+ cfg80211_mlme_purge_registrations(wdev);
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_P2P_DEVICE:
+ cfg80211_stop_p2p_device(rdev, wdev);
+ break;
+ case NL80211_IFTYPE_NAN:
+ cfg80211_stop_nan(rdev, wdev);
+ break;
+ default:
+ break;
+ }
+
+#ifdef CONFIG_CFG80211_WEXT
+ kfree_sensitive(wdev->wext.keys);
+ wdev->wext.keys = NULL;
+#endif
+ wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work);
+ /* deleted from the list, so can't be found from nl80211 any more */
+ cqm_config = rcu_access_pointer(wdev->cqm_config);
+ kfree_rcu(cqm_config, rcu_head);
+
+ /*
+ * Ensure that all events have been processed and
+ * freed.
+ */
+ cfg80211_process_wdev_events(wdev);
+
+ if (wdev->iftype == NL80211_IFTYPE_STATION ||
+ wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
+ for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) {
+ struct cfg80211_internal_bss *curbss;
+
+ curbss = wdev->links[link_id].client.current_bss;
+
+ if (WARN_ON(curbss)) {
+ cfg80211_unhold_bss(curbss);
+ cfg80211_put_bss(wdev->wiphy, &curbss->pub);
+ wdev->links[link_id].client.current_bss = NULL;
+ }
+ }
+ }
+
+ wdev->connected = false;
+}
+
+void cfg80211_unregister_wdev(struct wireless_dev *wdev)
+{
+ _cfg80211_unregister_wdev(wdev, true);
+}
+EXPORT_SYMBOL(cfg80211_unregister_wdev);
+
+static const struct device_type wiphy_type = {
+ .name = "wlan",
+};
+
+void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
+ enum nl80211_iftype iftype, int num)
+{
+ lockdep_assert_held(&rdev->wiphy.mtx);
+
+ rdev->num_running_ifaces += num;
+ if (iftype == NL80211_IFTYPE_MONITOR)
+ rdev->num_running_monitor_ifaces += num;
+}
+
+void __cfg80211_leave(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev)
+{
+ struct net_device *dev = wdev->netdev;
+ struct cfg80211_sched_scan_request *pos, *tmp;
+
+ lockdep_assert_held(&rdev->wiphy.mtx);
+ ASSERT_WDEV_LOCK(wdev);
+
+ cfg80211_pmsr_wdev_down(wdev);
+
+ cfg80211_stop_background_radar_detection(wdev);
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ __cfg80211_leave_ibss(rdev, dev, true);
+ break;
+ case NL80211_IFTYPE_P2P_CLIENT:
+ case NL80211_IFTYPE_STATION:
+ list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
+ list) {
+ if (dev == pos->dev)
+ cfg80211_stop_sched_scan_req(rdev, pos, false);
+ }
+
+#ifdef CONFIG_CFG80211_WEXT
+ kfree(wdev->wext.ie);
+ wdev->wext.ie = NULL;
+ wdev->wext.ie_len = 0;
+ wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
+#endif
+ cfg80211_disconnect(rdev, dev,
+ WLAN_REASON_DEAUTH_LEAVING, true);
+ break;
+ case NL80211_IFTYPE_MESH_POINT:
+ __cfg80211_leave_mesh(rdev, dev);
+ break;
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_P2P_GO:
+ __cfg80211_stop_ap(rdev, dev, -1, true);
+ break;
+ case NL80211_IFTYPE_OCB:
+ __cfg80211_leave_ocb(rdev, dev);
+ break;
+ case NL80211_IFTYPE_P2P_DEVICE:
+ case NL80211_IFTYPE_NAN:
+ /* cannot happen, has no netdev */
+ break;
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_MONITOR:
+ /* nothing to do */
+ break;
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case NL80211_IFTYPE_WDS:
+ case NUM_NL80211_IFTYPES:
+ /* invalid */
+ break;
+ }
+}
+
+void cfg80211_leave(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev)
+{
+ wdev_lock(wdev);
+ __cfg80211_leave(rdev, wdev);
+ wdev_unlock(wdev);
+}
+
+void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
+ gfp_t gfp)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ struct cfg80211_event *ev;
+ unsigned long flags;
+
+ trace_cfg80211_stop_iface(wiphy, wdev);
+
+ ev = kzalloc(sizeof(*ev), gfp);
+ if (!ev)
+ return;
+
+ ev->type = EVENT_STOPPED;
+
+ spin_lock_irqsave(&wdev->event_lock, flags);
+ list_add_tail(&ev->list, &wdev->event_list);
+ spin_unlock_irqrestore(&wdev->event_lock, flags);
+ queue_work(cfg80211_wq, &rdev->event_work);
+}
+EXPORT_SYMBOL(cfg80211_stop_iface);
+
+void cfg80211_init_wdev(struct wireless_dev *wdev)
+{
+ mutex_init(&wdev->mtx);
+ INIT_LIST_HEAD(&wdev->event_list);
+ spin_lock_init(&wdev->event_lock);
+ INIT_LIST_HEAD(&wdev->mgmt_registrations);
+ INIT_LIST_HEAD(&wdev->pmsr_list);
+ spin_lock_init(&wdev->pmsr_lock);
+ INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
+
+#ifdef CONFIG_CFG80211_WEXT
+ wdev->wext.default_key = -1;
+ wdev->wext.default_mgmt_key = -1;
+ wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
+#endif
+
+ wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work);
+
+ if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
+ wdev->ps = true;
+ else
+ wdev->ps = false;
+ /* allow mac80211 to determine the timeout */
+ wdev->ps_timeout = -1;
+
+ if ((wdev->iftype == NL80211_IFTYPE_STATION ||
+ wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
+ wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
+ wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
+
+ INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
+}
+
+void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev)
+{
+ ASSERT_RTNL();
+ lockdep_assert_held(&rdev->wiphy.mtx);
+
+ /*
+ * We get here also when the interface changes network namespaces,
+ * as it's registered into the new one, but we don't want it to
+ * change ID in that case. Checking if the ID is already assigned
+ * works, because 0 isn't considered a valid ID and the memory is
+ * 0-initialized.
+ */
+ if (!wdev->identifier)
+ wdev->identifier = ++rdev->wdev_id;
+ list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
+ rdev->devlist_generation++;
+ wdev->registered = true;
+
+ if (wdev->netdev &&
+ sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj,
+ "phy80211"))
+ pr_err("failed to add phy80211 symlink to netdev!\n");
+
+ nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
+}
+
+int cfg80211_register_netdevice(struct net_device *dev)
+{
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct cfg80211_registered_device *rdev;
+ int ret;
+
+ ASSERT_RTNL();
+
+ if (WARN_ON(!wdev))
+ return -EINVAL;
+
+ rdev = wiphy_to_rdev(wdev->wiphy);
+
+ lockdep_assert_held(&rdev->wiphy.mtx);
+
+ /* we'll take care of this */
+ wdev->registered = true;
+ wdev->registering = true;
+ ret = register_netdevice(dev);
+ if (ret)
+ goto out;
+
+ cfg80211_register_wdev(rdev, wdev);
+ ret = 0;
+out:
+ wdev->registering = false;
+ if (ret)
+ wdev->registered = false;
+ return ret;
+}
+EXPORT_SYMBOL(cfg80211_register_netdevice);
+
+static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
+ unsigned long state, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct cfg80211_registered_device *rdev;
+ struct cfg80211_sched_scan_request *pos, *tmp;
+
+ if (!wdev)
+ return NOTIFY_DONE;
+
+ rdev = wiphy_to_rdev(wdev->wiphy);
+
+ WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
+
+ switch (state) {
+ case NETDEV_POST_INIT:
+ SET_NETDEV_DEVTYPE(dev, &wiphy_type);
+ wdev->netdev = dev;
+ /* can only change netns with wiphy */
+ dev->features |= NETIF_F_NETNS_LOCAL;
+
+ cfg80211_init_wdev(wdev);
+ break;
+ case NETDEV_REGISTER:
+ if (!wdev->registered) {
+ wiphy_lock(&rdev->wiphy);
+ cfg80211_register_wdev(rdev, wdev);
+ wiphy_unlock(&rdev->wiphy);
+ }
+ break;
+ case NETDEV_UNREGISTER:
+ /*
+ * It is possible to get NETDEV_UNREGISTER multiple times,
+ * so check wdev->registered.
+ */
+ if (wdev->registered && !wdev->registering) {
+ wiphy_lock(&rdev->wiphy);
+ _cfg80211_unregister_wdev(wdev, false);
+ wiphy_unlock(&rdev->wiphy);
+ }
+ break;
+ case NETDEV_GOING_DOWN:
+ wiphy_lock(&rdev->wiphy);
+ cfg80211_leave(rdev, wdev);
+ cfg80211_remove_links(wdev);
+ wiphy_unlock(&rdev->wiphy);
+ /* since we just did cfg80211_leave() nothing to do there */
+ cancel_work_sync(&wdev->disconnect_wk);
+ break;
+ case NETDEV_DOWN:
+ wiphy_lock(&rdev->wiphy);
+ cfg80211_update_iface_num(rdev, wdev->iftype, -1);
+ if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
+ if (WARN_ON(!rdev->scan_req->notified &&
+ (!rdev->int_scan_req ||
+ !rdev->int_scan_req->notified)))
+ rdev->scan_req->info.aborted = true;
+ ___cfg80211_scan_done(rdev, false);
+ }
+
+ list_for_each_entry_safe(pos, tmp,
+ &rdev->sched_scan_req_list, list) {
+ if (WARN_ON(pos->dev == wdev->netdev))
+ cfg80211_stop_sched_scan_req(rdev, pos, false);
+ }
+
+ rdev->opencount--;
+ wiphy_unlock(&rdev->wiphy);
+ wake_up(&rdev->dev_wait);
+ break;
+ case NETDEV_UP:
+ wiphy_lock(&rdev->wiphy);
+ cfg80211_update_iface_num(rdev, wdev->iftype, 1);
+ wdev_lock(wdev);
+ switch (wdev->iftype) {
+#ifdef CONFIG_CFG80211_WEXT
+ case NL80211_IFTYPE_ADHOC:
+ cfg80211_ibss_wext_join(rdev, wdev);
+ break;
+ case NL80211_IFTYPE_STATION:
+ cfg80211_mgd_wext_connect(rdev, wdev);
+ break;
+#endif
+#ifdef CONFIG_MAC80211_MESH
+ case NL80211_IFTYPE_MESH_POINT:
+ {
+ /* backward compat code... */
+ struct mesh_setup setup;
+ memcpy(&setup, &default_mesh_setup,
+ sizeof(setup));
+ /* back compat only needed for mesh_id */
+ setup.mesh_id = wdev->u.mesh.id;
+ setup.mesh_id_len = wdev->u.mesh.id_up_len;
+ if (wdev->u.mesh.id_up_len)
+ __cfg80211_join_mesh(rdev, dev,
+ &setup,
+ &default_mesh_config);
+ break;
+ }
+#endif
+ default:
+ break;
+ }
+ wdev_unlock(wdev);
+ rdev->opencount++;
+
+ /*
+ * Configure power management to the driver here so that its
+ * correctly set also after interface type changes etc.
+ */
+ if ((wdev->iftype == NL80211_IFTYPE_STATION ||
+ wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
+ rdev->ops->set_power_mgmt &&
+ rdev_set_power_mgmt(rdev, dev, wdev->ps,
+ wdev->ps_timeout)) {
+ /* assume this means it's off */
+ wdev->ps = false;
+ }
+ wiphy_unlock(&rdev->wiphy);
+ break;
+ case NETDEV_PRE_UP:
+ if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
+ wdev->use_4addr, 0))
+ return notifier_from_errno(-EOPNOTSUPP);
+
+ if (rfkill_blocked(rdev->wiphy.rfkill))
+ return notifier_from_errno(-ERFKILL);
+ break;
+ default:
+ return NOTIFY_DONE;
+ }
+
+ wireless_nlevent_flush();
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block cfg80211_netdev_notifier = {
+ .notifier_call = cfg80211_netdev_notifier_call,
+};
+
+static void __net_exit cfg80211_pernet_exit(struct net *net)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rtnl_lock();
+ list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
+ if (net_eq(wiphy_net(&rdev->wiphy), net))
+ WARN_ON(cfg80211_switch_netns(rdev, &init_net));
+ }
+ rtnl_unlock();
+}
+
+static struct pernet_operations cfg80211_pernet_ops = {
+ .exit = cfg80211_pernet_exit,
+};
+
+void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ unsigned long flags;
+
+ spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
+ if (list_empty(&work->entry))
+ list_add_tail(&work->entry, &rdev->wiphy_work_list);
+ spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
+
+ queue_work(system_unbound_wq, &rdev->wiphy_work);
+}
+EXPORT_SYMBOL_GPL(wiphy_work_queue);
+
+void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ unsigned long flags;
+
+ lockdep_assert_held(&wiphy->mtx);
+
+ spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
+ if (!list_empty(&work->entry))
+ list_del_init(&work->entry);
+ spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
+}
+EXPORT_SYMBOL_GPL(wiphy_work_cancel);
+
+void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ unsigned long flags;
+ bool run;
+
+ spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
+ run = !work || !list_empty(&work->entry);
+ spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
+
+ if (run)
+ cfg80211_process_wiphy_works(rdev, work);
+}
+EXPORT_SYMBOL_GPL(wiphy_work_flush);
+
+void wiphy_delayed_work_timer(struct timer_list *t)
+{
+ struct wiphy_delayed_work *dwork = from_timer(dwork, t, timer);
+
+ wiphy_work_queue(dwork->wiphy, &dwork->work);
+}
+EXPORT_SYMBOL(wiphy_delayed_work_timer);
+
+void wiphy_delayed_work_queue(struct wiphy *wiphy,
+ struct wiphy_delayed_work *dwork,
+ unsigned long delay)
+{
+ if (!delay) {
+ wiphy_work_queue(wiphy, &dwork->work);
+ return;
+ }
+
+ dwork->wiphy = wiphy;
+ mod_timer(&dwork->timer, jiffies + delay);
+}
+EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue);
+
+void wiphy_delayed_work_cancel(struct wiphy *wiphy,
+ struct wiphy_delayed_work *dwork)
+{
+ lockdep_assert_held(&wiphy->mtx);
+
+ del_timer_sync(&dwork->timer);
+ wiphy_work_cancel(wiphy, &dwork->work);
+}
+EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel);
+
+void wiphy_delayed_work_flush(struct wiphy *wiphy,
+ struct wiphy_delayed_work *dwork)
+{
+ lockdep_assert_held(&wiphy->mtx);
+
+ del_timer_sync(&dwork->timer);
+ wiphy_work_flush(wiphy, &dwork->work);
+}
+EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush);
+
+static int __init cfg80211_init(void)
+{
+ int err;
+
+ err = register_pernet_device(&cfg80211_pernet_ops);
+ if (err)
+ goto out_fail_pernet;
+
+ err = wiphy_sysfs_init();
+ if (err)
+ goto out_fail_sysfs;
+
+ err = register_netdevice_notifier(&cfg80211_netdev_notifier);
+ if (err)
+ goto out_fail_notifier;
+
+ err = nl80211_init();
+ if (err)
+ goto out_fail_nl80211;
+
+ ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
+
+ err = regulatory_init();
+ if (err)
+ goto out_fail_reg;
+
+ cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
+ if (!cfg80211_wq) {
+ err = -ENOMEM;
+ goto out_fail_wq;
+ }
+
+ return 0;
+
+out_fail_wq:
+ regulatory_exit();
+out_fail_reg:
+ debugfs_remove(ieee80211_debugfs_dir);
+ nl80211_exit();
+out_fail_nl80211:
+ unregister_netdevice_notifier(&cfg80211_netdev_notifier);
+out_fail_notifier:
+ wiphy_sysfs_exit();
+out_fail_sysfs:
+ unregister_pernet_device(&cfg80211_pernet_ops);
+out_fail_pernet:
+ return err;
+}
+fs_initcall(cfg80211_init);
+
+static void __exit cfg80211_exit(void)
+{
+ debugfs_remove(ieee80211_debugfs_dir);
+ nl80211_exit();
+ unregister_netdevice_notifier(&cfg80211_netdev_notifier);
+ wiphy_sysfs_exit();
+ regulatory_exit();
+ unregister_pernet_device(&cfg80211_pernet_ops);
+ destroy_workqueue(cfg80211_wq);
+}
+module_exit(cfg80211_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-18 16:35:37 +0000