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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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) 2018-2026 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"
/* maximum length of radio debugfs directory name */#define RADIO_DEBUGFSDIR_MAX_LEN 8
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();
for_each_rdev(rdev) { 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. */ for_each_rdev(rdev2) 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(); lockdep_assert_wiphy(&rdev->wiphy);
/* 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;
debugfs_change_name(rdev->wiphy.debugfsdir, "%s", 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->netns_immutable = false; err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); if (err) break; wdev->netdev->netns_immutable = true; }
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->netns_immutable = false; err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); WARN_ON(err); wdev->netdev->netns_immutable = true; }
return err; }
guard(wiphy)(&rdev->wiphy);
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;
guard(wiphy)(&rdev->wiphy);
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->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){ struct cfg80211_nan_local_sched empty_sched = {};
lockdep_assert_held(&rdev->wiphy.mtx);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) return;
if (!wdev_running(wdev)) return;
/* * If there is a scheduled update pending, mark it as canceled, so the * empty schedule will be accepted */ wdev->u.nan.sched_update_pending = false;
/* Unschedule all */ cfg80211_nan_set_local_schedule(rdev, wdev, &empty_sched);
rdev_stop_nan(rdev, wdev); wdev->is_running = false;
eth_zero_addr(wdev->u.nan.cluster_id);
rdev->opencount--;}
int cfg80211_nan_set_local_schedule(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, struct cfg80211_nan_local_sched *sched){ int ret;
lockdep_assert_held(&rdev->wiphy.mtx);
if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev)) return -EINVAL;
if (wdev->u.nan.sched_update_pending) return -EBUSY;
ret = rdev_nan_set_local_sched(rdev, wdev, sched); if (ret) return ret;
wdev->u.nan.sched_update_pending = sched->deferred;
kfree(wdev->u.nan.chandefs); wdev->u.nan.chandefs = NULL; wdev->u.nan.n_channels = 0;
if (!sched->n_channels) return 0;
wdev->u.nan.chandefs = kcalloc(sched->n_channels, sizeof(*wdev->u.nan.chandefs), GFP_KERNEL); if (!wdev->u.nan.chandefs) return -ENOMEM;
for (int i = 0; i < sched->n_channels; i++) wdev->u.nan.chandefs[i] = sched->nan_channels[i].chandef;
wdev->u.nan.n_channels = sched->n_channels;
return 0;}
void cfg80211_stop_pd(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev){ lockdep_assert_held(&rdev->wiphy.mtx);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_PD)) return;
if (!rdev->ops->stop_pd) return;
if (!wdev_running(wdev)) return;
cfg80211_pmsr_wdev_down(wdev);
rdev_stop_pd(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();
/* * Some netdev interfaces need to be closed before some non-netdev * ones, i.e. NAN_DATA interfaces need to be closed before the NAN * interface */ list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { if (wdev->netdev) { dev_close(wdev->netdev); continue; } }
guard(wiphy)(wiphy);
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 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; case NL80211_IFTYPE_PD: cfg80211_stop_pd(rdev, wdev); break; default: break; } }}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);
guard(wiphy)(&rdev->wiphy);
cfg80211_process_rdev_events(rdev);}
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) { cfg80211_close_dependents(rdev, wdev);
if (wdev->netdev) dev_close(wdev->netdev);
guard(wiphy)(&rdev->wiphy);
cfg80211_remove_virtual_intf(rdev, wdev); } }}
void cfg80211_close_dependents(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev){ ASSERT_RTNL();
if (wdev->iftype != NL80211_IFTYPE_NAN) return;
/* Close all NAN DATA interfaces */ list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) dev_close(wdev->netdev); }}
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 wiphy *wiphy, struct wiphy_work *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);
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); }}
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);
trace_wiphy_work_worker_start(&rdev->wiphy);
guard(wiphy)(&rdev->wiphy); if (rdev->suspended) return;
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)) queue_work(system_dfl_wq, work); spin_unlock_irq(&rdev->wiphy_work_lock);
trace_wiphy_work_run(&rdev->wiphy, wk); wk->func(&rdev->wiphy, wk); } else { spin_unlock_irq(&rdev->wiphy_work_lock); }}
/* 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); wiphy_work_init(&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); wiphy_work_init(&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); INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); INIT_LIST_HEAD(&rdev->wiphy_work_list); spin_lock_init(&rdev->wiphy_work_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->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);
staticint wiphy_verify_iface_combinations(struct wiphy *wiphy, const struct ieee80211_iface_combination *iface_comb, int n_iface_comb, bool combined_radio){ const struct ieee80211_iface_combination *c; int i, j;
for (i = 0; i < n_iface_comb; i++) { u32 cnt = 0; u16 all_iftypes = 0;
c = &iface_comb[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. Avoid this check * for multi-radio global combination, since it hold * the capabilities of all radio combinations. */ if (!combined_radio && 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, avoid this * check for multi-radio global combination, since it * hold the capabilities of all radio combinations. */ if (!combined_radio && 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;}
static int wiphy_verify_combinations(struct wiphy *wiphy){ int i, ret; bool combined_radio = false;
if (wiphy->n_radio) { for (i = 0; i < wiphy->n_radio; i++) { const struct wiphy_radio *radio = &wiphy->radio[i];
ret = wiphy_verify_iface_combinations(wiphy, radio->iface_combinations, radio->n_iface_combinations, false); if (ret) return ret; }
combined_radio = true; }
ret = wiphy_verify_iface_combinations(wiphy, wiphy->iface_combinations, wiphy->n_iface_combinations, combined_radio);
return ret;}
static bool wiphy_cipher_suites_valid(const struct wiphy *wiphy){ int i, j;
if (wiphy->n_cipher_suites && !wiphy->cipher_suites) return false;
for (i = 0; i < wiphy->n_cipher_suites; i++) { for (j = 0; j < i; j++) { if (wiphy->cipher_suites[i] == wiphy->cipher_suites[j]) return false; } }
return true;}
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_PD)) && (!rdev->ops->start_pd || !rdev->ops->stop_pd))) 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_NAN_DATA)) && (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1))) 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_320)))) 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;
if (!wiphy_cipher_suites_valid(wiphy)) return -EINVAL;
/* sanity check supported bands/channels */ for (band = 0; band < NUM_NL80211_BANDS; band++) { const struct ieee80211_sband_iftype_data *iftd; 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_each_sband_iftype_data(sband, i, iftd) { bool has_ap, has_non_ap; u32 ap_bits = BIT(NL80211_IFTYPE_AP) | BIT(NL80211_IFTYPE_P2P_GO);
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;
/* Allocate radio configuration space for multi-radio wiphy */ if (wiphy->n_radio > 0) { int idx;
wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg, wiphy->n_radio); if (!wiphy->radio_cfg) return -ENOMEM; /* * Initialize wiphy radio parameters to IEEE 802.11 * MIB default values. RTS threshold is disabled by * default with the special -1 value. */ for (idx = 0; idx < wiphy->n_radio; idx++) wiphy->radio_cfg[idx].rts_threshold = (u32)-1; }
/* check and set up bitrates */ ieee80211_set_bitrate_flags(wiphy);
rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW) rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN; else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN) rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW; if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS) rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS; else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS) rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS;
rtnl_lock(); wiphy_lock(&rdev->wiphy); res = device_add(&rdev->wiphy.dev); if (res) { wiphy_unlock(&rdev->wiphy); 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); if (wiphy->n_radio > 0) { int idx; char radio_name[RADIO_DEBUGFSDIR_MAX_LEN];
for (idx = 0; idx < wiphy->n_radio; idx++) { scnprintf(radio_name, sizeof(radio_name), "radio%d", idx); wiphy->radio_cfg[idx].radio_debugfsdir = debugfs_create_dir(radio_name, rdev->wiphy.debugfsdir); } }
cfg80211_debugfs_rdev_add(rdev); nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); wiphy_unlock(&rdev->wiphy);
/* set up regulatory info */ wiphy_regulatory_register(wiphy);
if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { struct regulatory_request request = { .wiphy_idx = get_wiphy_idx(wiphy), .initiator = NL80211_REGDOM_SET_BY_DRIVER, .alpha2[0] = '9', .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);
trace_wiphy_work_run(&rdev->wiphy, wk); 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);
cancel_work_sync(&rdev->sched_scan_res_wk); cancel_work_sync(&rdev->rfkill_block); 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->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_free_coalesce(rdev->coalesce); rdev->coalesce = NULL;}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; unsigned long flags;
spin_lock_irqsave(&rdev->wiphy_work_lock, flags); WARN_ON(!list_empty(&rdev->wiphy_work_list)); spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags); cancel_work_sync(&rdev->wiphy_work);
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){ kfree(wiphy->radio_cfg); 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);
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++; wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk);
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; case NL80211_IFTYPE_PD: cfg80211_stop_pd(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); RCU_INIT_POINTER(wdev->cqm_config, NULL);
/* * 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_locked(struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, int link_id){ struct net_device *dev = wdev->netdev; struct cfg80211_sched_scan_request *pos, *tmp;
lockdep_assert_held(&rdev->wiphy.mtx);
cfg80211_pmsr_wdev_down(wdev);
cfg80211_stop_radar_detection(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, link_id, true); break; case NL80211_IFTYPE_OCB: cfg80211_leave_ocb(rdev, dev); break; case NL80211_IFTYPE_P2P_DEVICE: cfg80211_stop_p2p_device(rdev, wdev); break; case NL80211_IFTYPE_NAN: cfg80211_stop_nan(rdev, wdev); break; case NL80211_IFTYPE_PD: cfg80211_stop_pd(rdev, wdev); break; case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_MONITOR: case NL80211_IFTYPE_NAN_DATA: /* 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, int link_id){ ASSERT_RTNL();
/* NAN_DATA interfaces must be closed before stopping NAN */ cfg80211_close_dependents(rdev, wdev);
guard(wiphy)(&rdev->wiphy);
cfg80211_leave_locked(rdev, wdev, link_id);}
void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev, int link_id, gfp_t gfp){ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); struct cfg80211_event *ev; unsigned long flags;
/* Only AP/GO interfaces may have a specific link_id */ if (WARN_ON_ONCE(link_id != -1 && wdev->iftype != NL80211_IFTYPE_AP && wdev->iftype != NL80211_IFTYPE_P2P_GO)) link_id = -1;
trace_cfg80211_stop_link(wiphy, wdev, link_id);
if (wdev->iftype == NL80211_IFTYPE_NAN) return;
ev = kzalloc_obj(*ev, gfp); if (!ev) return;
ev->type = EVENT_STOPPED; ev->link_id = link_id;
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_link);
void cfg80211_init_wdev(struct wireless_dev *wdev){ 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); wiphy_work_init(&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;
wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 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;
wiphy_work_init(&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->netns_immutable = true;
cfg80211_init_wdev(wdev); break; case NETDEV_REGISTER: if (!wdev->registered) { guard(wiphy)(&rdev->wiphy);
cfg80211_register_wdev(rdev, wdev); } break; case NETDEV_UNREGISTER: /* * It is possible to get NETDEV_UNREGISTER multiple times, * so check wdev->registered. */ if (wdev->registered && !wdev->registering) { guard(wiphy)(&rdev->wiphy);
_cfg80211_unregister_wdev(wdev, false); } break; case NETDEV_GOING_DOWN: cfg80211_leave(rdev, wdev, -1); scoped_guard(wiphy, &rdev->wiphy) { cfg80211_remove_links(wdev); /* since we just did cfg80211_leave() nothing to do there */ wiphy_work_cancel(wdev->wiphy, &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->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); 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; } 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);
/* NAN_DATA interfaces require a running NAN interface */ if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) { struct wireless_dev *iter; bool nan_started = false;
list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) { if (iter->iftype == NL80211_IFTYPE_NAN && wdev_running(iter)) { nan_started = true; break; } }
if (!nan_started) return notifier_from_errno(-ENOLINK); } 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(); for_each_rdev(rdev) { 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;
trace_wiphy_work_queue(wiphy, work);
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_dfl_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);
trace_wiphy_work_cancel(wiphy, work);
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;
trace_wiphy_work_flush(wiphy, work);
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 = timer_container_of(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){ trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay);
if (!delay) { timer_delete(&dwork->timer); 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);
timer_delete_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);
timer_delete_sync(&dwork->timer); wiphy_work_flush(wiphy, &dwork->work);}EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush);
bool wiphy_delayed_work_pending(struct wiphy *wiphy, struct wiphy_delayed_work *dwork){ return timer_pending(&dwork->timer);}EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending);
enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t){ struct wiphy_hrtimer_work *hrwork = container_of(t, struct wiphy_hrtimer_work, timer);
wiphy_work_queue(hrwork->wiphy, &hrwork->work);
return HRTIMER_NORESTART;}EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer);
void wiphy_hrtimer_work_queue(struct wiphy *wiphy, struct wiphy_hrtimer_work *hrwork, ktime_t delay){ trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay);
if (!delay) { hrtimer_cancel(&hrwork->timer); wiphy_work_queue(wiphy, &hrwork->work); return; }
hrwork->wiphy = wiphy; hrtimer_start_range_ns(&hrwork->timer, delay, 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL);}EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue);
void wiphy_hrtimer_work_cancel(struct wiphy *wiphy, struct wiphy_hrtimer_work *hrwork){ lockdep_assert_held(&wiphy->mtx);
hrtimer_cancel(&hrwork->timer); wiphy_work_cancel(wiphy, &hrwork->work);}EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel);
void wiphy_hrtimer_work_flush(struct wiphy *wiphy, struct wiphy_hrtimer_work *hrwork){ lockdep_assert_held(&wiphy->mtx);
hrtimer_cancel(&hrwork->timer); wiphy_work_flush(wiphy, &hrwork->work);}EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush);
bool wiphy_hrtimer_work_pending(struct wiphy *wiphy, struct wiphy_hrtimer_work *hrwork){ return hrtimer_is_queued(&hrwork->timer);}EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending);
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);