diff options
Diffstat (limited to 'net/wireless/core.c')
| -rw-r--r-- | net/wireless/core.c | 174 |
1 files changed, 141 insertions, 33 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c index b3ec9eaec36b..25bc2e50a061 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -129,6 +129,7 @@ int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, int result; ASSERT_RTNL(); + lockdep_assert_wiphy(&rdev->wiphy); /* Ignore nop renames */ if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) @@ -195,6 +196,8 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, continue; nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); } + + wiphy_lock(&rdev->wiphy); nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); wiphy_net_set(&rdev->wiphy, net); @@ -203,6 +206,8 @@ int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, WARN_ON(err); nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); + wiphy_unlock(&rdev->wiphy); + list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { if (!wdev->netdev) continue; @@ -360,7 +365,8 @@ static void cfg80211_destroy_iface_wk(struct work_struct *work) rtnl_unlock(); } -static void cfg80211_sched_scan_stop_wk(struct work_struct *work) +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; @@ -368,12 +374,10 @@ static void cfg80211_sched_scan_stop_wk(struct work_struct *work) 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) @@ -408,6 +412,34 @@ static void cfg80211_propagate_cac_done_wk(struct work_struct *work) 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, @@ -495,7 +527,7 @@ use_default_name: 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); + 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 @@ -508,7 +540,7 @@ use_default_name: 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); + 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); @@ -533,6 +565,9 @@ use_default_name: 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); @@ -721,22 +756,6 @@ int wiphy_register(struct wiphy *wiphy) return -EINVAL; } - /* - * 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_MESH_POINT) | - 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 | @@ -941,8 +960,10 @@ int wiphy_register(struct wiphy *wiphy) rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; rtnl_lock(); + wiphy_lock(&rdev->wiphy); res = device_add(&rdev->wiphy.dev); if (res) { + wiphy_unlock(&rdev->wiphy); rtnl_unlock(); return res; } @@ -956,6 +977,7 @@ int wiphy_register(struct wiphy *wiphy) 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); @@ -1027,6 +1049,31 @@ void wiphy_rfkill_start_polling(struct wiphy *wiphy) } EXPORT_SYMBOL(wiphy_rfkill_start_polling); +void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev) +{ + 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 (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); @@ -1065,25 +1112,29 @@ void wiphy_unregister(struct wiphy *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); wiphy_unlock(&rdev->wiphy); rtnl_unlock(); - flush_work(&rdev->scan_done_wk); + /* this has nothing to do now but make sure it's gone */ + cancel_work_sync(&rdev->wiphy_work); + 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); -#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); } @@ -1145,8 +1196,6 @@ static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, 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; @@ -1178,10 +1227,6 @@ static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, kfree_sensitive(wdev->wext.keys); wdev->wext.keys = NULL; #endif - /* only initialized if we have a netdev */ - if (wdev->netdev) - flush_work(&wdev->disconnect_wk); - cfg80211_cqm_config_free(wdev); /* @@ -1455,6 +1500,9 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb, 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); + cancel_work_sync(&wdev->pmsr_free_wk); break; case NETDEV_DOWN: wiphy_lock(&rdev->wiphy); @@ -1564,6 +1612,66 @@ 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); + + schedule_work(&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_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); + static int __init cfg80211_init(void) { int err; |