| /* |
| * This is the linux wireless configuration interface. |
| * |
| * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
| * Copyright 2013-2014 Intel Mobile Communications GmbH |
| * Copyright 2015 Intel Deutschland GmbH |
| */ |
| |
| #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(); |
| |
| /* 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 (rdev->wiphy.debugfsdir && |
| !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, |
| rdev->wiphy.debugfsdir, |
| rdev->wiphy.debugfsdir->d_parent, |
| newname)) |
| pr_err("failed to rename debugfs dir to %s!\n", 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; |
| } |
| |
| wiphy_net_set(&rdev->wiphy, net); |
| |
| err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
| WARN_ON(err); |
| |
| 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) |
| { |
| ASSERT_RTNL(); |
| |
| 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->scan_req->info.aborted = true; |
| ___cfg80211_scan_done(rdev, false); |
| } |
| } |
| |
| void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, |
| struct wireless_dev *wdev) |
| { |
| ASSERT_RTNL(); |
| |
| 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 */ |
| 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; |
| } |
| } |
| } |
| 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_sync_work(struct work_struct *work) |
| { |
| struct cfg80211_registered_device *rdev; |
| |
| rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
| cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); |
| } |
| |
| static void cfg80211_event_work(struct work_struct *work) |
| { |
| struct cfg80211_registered_device *rdev; |
| |
| rdev = container_of(work, struct cfg80211_registered_device, |
| event_work); |
| |
| rtnl_lock(); |
| cfg80211_process_rdev_events(rdev); |
| rtnl_unlock(); |
| } |
| |
| 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) |
| rdev_del_virtual_intf(rdev, wdev); |
| } |
| } |
| |
| 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); |
| |
| rtnl_lock(); |
| 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); |
| } |
| rtnl_unlock(); |
| } |
| |
| 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(); |
| } |
| |
| /* 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; |
| |
| /* |
| * Make sure the padding is >= the rest of the struct so that we |
| * always keep it large enough to pad out the entire original |
| * kernel's struct. We really only need to make sure it's larger |
| * than the kernel compat is compiled against, but since it'll |
| * only increase in size make sure it's larger than the current |
| * version of it. Subtract since it's included. |
| */ |
| BUILD_BUG_ON(WIPHY_COMPAT_PAD_SIZE < |
| sizeof(struct wiphy) - WIPHY_COMPAT_PAD_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 { |
| 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? |
| */ |
| dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
| } |
| |
| 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_LIST_HEAD(&rdev->mlme_unreg); |
| spin_lock_init(&rdev->mlme_unreg_lock); |
| INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); |
| INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, |
| cfg80211_dfs_channels_update_work); |
| 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); |
| |
| #ifdef CPTCFG_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->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), |
| &rdev->wiphy.dev, RFKILL_TYPE_WLAN, |
| &rdev->rfkill_ops, rdev); |
| |
| if (!rdev->rfkill) { |
| kfree(rdev); |
| return NULL; |
| } |
| |
| INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
| INIT_WORK(&rdev->conn_work, cfg80211_conn_work); |
| INIT_WORK(&rdev->event_work, cfg80211_event_work); |
| |
| 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; |
| |
| /* |
| * Put a sane limit on maximum number of different |
| * channels to simplify channel accounting code. |
| */ |
| if (WARN_ON(c->num_different_channels > |
| CFG80211_MAX_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; |
| } |
| |
| #ifndef CPTCFG_WIRELESS_WDS |
| if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) |
| return -EINVAL; |
| #endif |
| |
| /* 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; |
| |
| #ifndef CPTCFG_WIRELESS_WDS |
| if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) |
| return -EINVAL; |
| #endif |
| |
| /* |
| * if a wiphy has unsupported modes for regulatory channel enforcement, |
| * opt-out of enforcement checking |
| */ |
| if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | |
| BIT(NL80211_IFTYPE_P2P_CLIENT) | |
| BIT(NL80211_IFTYPE_AP) | |
| BIT(NL80211_IFTYPE_P2P_GO) | |
| BIT(NL80211_IFTYPE_ADHOC) | |
| BIT(NL80211_IFTYPE_P2P_DEVICE) | |
| BIT(NL80211_IFTYPE_NAN) | |
| BIT(NL80211_IFTYPE_AP_VLAN) | |
| BIT(NL80211_IFTYPE_MONITOR))) |
| wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; |
| |
| 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 (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++) { |
| sband = wiphy->bands[band]; |
| if (!sband) |
| continue; |
| |
| sband->band = band; |
| if (WARN_ON(!sband->n_channels)) |
| return -EINVAL; |
| /* |
| * on 60GHz band, there are no legacy rates, so |
| * n_bitrates is 0 |
| */ |
| if (WARN_ON(band != NL80211_BAND_60GHZ && |
| !sband->n_bitrates)) |
| 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; |
| } |
| |
| have_band = true; |
| } |
| |
| if (!have_band) { |
| WARN_ON(1); |
| 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 |
| |
| /* 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; |
| } |
| |
| /* set up regulatory info */ |
| wiphy_regulatory_register(wiphy); |
| |
| 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 (IS_ERR(rdev->wiphy.debugfsdir)) |
| rdev->wiphy.debugfsdir = NULL; |
| |
| cfg80211_debugfs_rdev_add(rdev); |
| nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_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->rfkill); |
| if (res) { |
| rfkill_destroy(rdev->rfkill); |
| rdev->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(rdev->rfkill); |
| } |
| EXPORT_SYMBOL(wiphy_rfkill_start_polling); |
| |
| void wiphy_rfkill_stop_polling(struct wiphy *wiphy) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| |
| rfkill_pause_polling(rdev->rfkill); |
| } |
| EXPORT_SYMBOL(wiphy_rfkill_stop_polling); |
| |
| void wiphy_unregister(struct wiphy *wiphy) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| |
| wait_event(rdev->dev_wait, ({ |
| int __count; |
| rtnl_lock(); |
| __count = rdev->opencount; |
| rtnl_unlock(); |
| __count == 0; })); |
| |
| if (rdev->rfkill) |
| rfkill_unregister(rdev->rfkill); |
| |
| rtnl_lock(); |
| 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); |
| |
| rtnl_unlock(); |
| |
| 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); |
| flush_work(&rdev->destroy_work); |
| flush_work(&rdev->sched_scan_stop_wk); |
| flush_work(&rdev->mlme_unreg_wk); |
| flush_work(&rdev->propagate_radar_detect_wk); |
| flush_work(&rdev->propagate_cac_done_wk); |
| |
| #ifdef CONFIG_PM |
| if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) |
| rdev_set_wakeup(rdev, false); |
| #endif |
| 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->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); |
| kfree(rdev); |
| } |
| |
| void wiphy_free(struct wiphy *wiphy) |
| { |
| put_device(&wiphy->dev); |
| } |
| EXPORT_SYMBOL(wiphy_free); |
| |
| void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| |
| if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
| schedule_work(&rdev->rfkill_sync); |
| } |
| EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); |
| |
| void cfg80211_cqm_config_free(struct wireless_dev *wdev) |
| { |
| kfree(wdev->cqm_config); |
| wdev->cqm_config = NULL; |
| } |
| |
| void cfg80211_unregister_wdev(struct wireless_dev *wdev) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
| |
| ASSERT_RTNL(); |
| |
| if (WARN_ON(wdev->netdev)) |
| return; |
| |
| nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); |
| |
| list_del_rcu(&wdev->list); |
| rdev->devlist_generation++; |
| |
| switch (wdev->iftype) { |
| case NL80211_IFTYPE_P2P_DEVICE: |
| cfg80211_mlme_purge_registrations(wdev); |
| cfg80211_stop_p2p_device(rdev, wdev); |
| break; |
| case NL80211_IFTYPE_NAN: |
| cfg80211_stop_nan(rdev, wdev); |
| break; |
| default: |
| WARN_ON_ONCE(1); |
| break; |
| } |
| |
| cfg80211_cqm_config_free(wdev); |
| } |
| 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) |
| { |
| ASSERT_RTNL(); |
| |
| 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; |
| |
| ASSERT_RTNL(); |
| ASSERT_WDEV_LOCK(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 CPTCFG_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, true); |
| break; |
| case NL80211_IFTYPE_OCB: |
| __cfg80211_leave_ocb(rdev, dev); |
| break; |
| case NL80211_IFTYPE_WDS: |
| /* must be handled by mac80211/driver, has no APIs */ |
| 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 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); |
| |
| 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); |
| break; |
| case NETDEV_REGISTER: |
| /* |
| * NB: cannot take rdev->mtx here because this may be |
| * called within code protected by it when interfaces |
| * are added with nl80211. |
| */ |
| mutex_init(&wdev->mtx); |
| INIT_LIST_HEAD(&wdev->event_list); |
| spin_lock_init(&wdev->event_lock); |
| INIT_LIST_HEAD(&wdev->mgmt_registrations); |
| spin_lock_init(&wdev->mgmt_registrations_lock); |
| |
| /* |
| * 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++; |
| /* can only change netns with wiphy */ |
| dev->features |= NETIF_F_NETNS_LOCAL; |
| |
| if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
| "phy80211")) { |
| pr_err("failed to add phy80211 symlink to netdev!\n"); |
| } |
| wdev->netdev = dev; |
| #ifdef CPTCFG_CFG80211_WEXT |
| #ifdef CONFIG_WIRELESS_EXT |
| if (!dev->wireless_handlers) |
| dev->wireless_handlers = &cfg80211_wext_handler; |
| #else |
| printk_once(KERN_WARNING "cfg80211: wext will not work because " |
| "kernel was compiled with CONFIG_WIRELESS_EXT=n. " |
| "Tools using wext interface, like iwconfig will " |
| "not work.\n"); |
| #endif |
| 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) |
| dev->priv_flags |= IFF_DONT_BRIDGE; |
| |
| INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); |
| |
| nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); |
| break; |
| case NETDEV_GOING_DOWN: |
| cfg80211_leave(rdev, wdev); |
| break; |
| case NETDEV_DOWN: |
| 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->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 && pos->dev == wdev->netdev)) |
| cfg80211_stop_sched_scan_req(rdev, pos, false); |
| } |
| |
| rdev->opencount--; |
| wake_up(&rdev->dev_wait); |
| break; |
| case NETDEV_UP: |
| cfg80211_update_iface_num(rdev, wdev->iftype, 1); |
| wdev_lock(wdev); |
| switch (wdev->iftype) { |
| #ifdef CPTCFG_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->ssid; |
| setup.mesh_id_len = wdev->mesh_id_up_len; |
| if (wdev->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; |
| } |
| break; |
| case NETDEV_UNREGISTER: |
| /* |
| * It is possible to get NETDEV_UNREGISTER |
| * multiple times. To detect that, check |
| * that the interface is still on the list |
| * of registered interfaces, and only then |
| * remove and clean it up. |
| */ |
| if (!list_empty(&wdev->list)) { |
| nl80211_notify_iface(rdev, wdev, |
| NL80211_CMD_DEL_INTERFACE); |
| sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
| list_del_rcu(&wdev->list); |
| rdev->devlist_generation++; |
| cfg80211_mlme_purge_registrations(wdev); |
| #ifdef CPTCFG_CFG80211_WEXT |
| kzfree(wdev->wext.keys); |
| #endif |
| flush_work(&wdev->disconnect_wk); |
| cfg80211_cqm_config_free(wdev); |
| } |
| /* |
| * synchronise (so that we won't find this netdev |
| * from other code any more) and then clear the list |
| * head so that the above code can safely check for |
| * !list_empty() to avoid double-cleanup. |
| */ |
| synchronize_rcu(); |
| INIT_LIST_HEAD(&wdev->list); |
| /* |
| * Ensure that all events have been processed and |
| * freed. |
| */ |
| cfg80211_process_wdev_events(wdev); |
| |
| if (WARN_ON(wdev->current_bss)) { |
| cfg80211_unhold_bss(wdev->current_bss); |
| cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); |
| wdev->current_bss = NULL; |
| } |
| break; |
| case NETDEV_PRE_UP: |
| if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
| return notifier_from_errno(-EOPNOTSUPP); |
| if (rfkill_blocked(rdev->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, |
| }; |
| |
| 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; |
| } |
| subsys_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); |