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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * This is the linux wireless configuration interface.
- *
- * Copyright 2006-2010 Johannes Berg <[email protected]>
- * 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;
- rdev_rfkill_poll(rdev);
- }
- 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(®->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);
- void cfg80211_cqm_config_free(struct wireless_dev *wdev)
- {
- kfree(wdev->cqm_config);
- wdev->cqm_config = NULL;
- }
- static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
- bool unregister_netdev)
- {
- struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
- 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
- cfg80211_cqm_config_free(wdev);
- /*
- * 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
- 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);
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