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1600 lines
40 KiB
1600 lines
40 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* This is the linux wireless configuration interface. |
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* |
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* Copyright 2006-2010 Johannes Berg <[email protected]> |
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* Copyright 2013-2014 Intel Mobile Communications GmbH |
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* Copyright 2015-2017 Intel Deutschland GmbH |
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* Copyright (C) 2018-2020 Intel Corporation |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/if.h> |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/list.h> |
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#include <linux/slab.h> |
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#include <linux/nl80211.h> |
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#include <linux/debugfs.h> |
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#include <linux/notifier.h> |
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#include <linux/device.h> |
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#include <linux/etherdevice.h> |
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#include <linux/rtnetlink.h> |
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#include <linux/sched.h> |
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#include <net/genetlink.h> |
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#include <net/cfg80211.h> |
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#include "nl80211.h" |
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#include "core.h" |
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#include "sysfs.h" |
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#include "debugfs.h" |
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#include "wext-compat.h" |
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#include "rdev-ops.h" |
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/* name for sysfs, %d is appended */ |
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#define PHY_NAME "phy" |
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MODULE_AUTHOR("Johannes Berg"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("wireless configuration support"); |
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MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); |
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/* RCU-protected (and RTNL for writers) */ |
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LIST_HEAD(cfg80211_rdev_list); |
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int cfg80211_rdev_list_generation; |
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/* for debugfs */ |
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static struct dentry *ieee80211_debugfs_dir; |
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/* for the cleanup, scan and event works */ |
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struct workqueue_struct *cfg80211_wq; |
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static bool cfg80211_disable_40mhz_24ghz; |
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module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); |
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MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, |
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"Disable 40MHz support in the 2.4GHz band"); |
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struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
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{ |
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struct cfg80211_registered_device *result = NULL, *rdev; |
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ASSERT_RTNL(); |
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list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
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if (rdev->wiphy_idx == wiphy_idx) { |
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result = rdev; |
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break; |
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} |
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} |
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return result; |
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} |
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int get_wiphy_idx(struct wiphy *wiphy) |
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{ |
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
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return rdev->wiphy_idx; |
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} |
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struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
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{ |
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struct cfg80211_registered_device *rdev; |
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ASSERT_RTNL(); |
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rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
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if (!rdev) |
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return NULL; |
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return &rdev->wiphy; |
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} |
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static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, |
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const char *newname) |
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{ |
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struct cfg80211_registered_device *rdev2; |
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int wiphy_idx, taken = -1, digits; |
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ASSERT_RTNL(); |
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if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) |
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return -EINVAL; |
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/* prohibit calling the thing phy%d when %d is not its number */ |
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sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); |
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if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { |
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/* count number of places needed to print wiphy_idx */ |
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digits = 1; |
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while (wiphy_idx /= 10) |
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digits++; |
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/* |
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* deny the name if it is phy<idx> where <idx> is printed |
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* without leading zeroes. taken == strlen(newname) here |
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*/ |
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if (taken == strlen(PHY_NAME) + digits) |
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return -EINVAL; |
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} |
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/* Ensure another device does not already have this name. */ |
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list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
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if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) |
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return -EINVAL; |
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return 0; |
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} |
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int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
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char *newname) |
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{ |
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int result; |
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ASSERT_RTNL(); |
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/* Ignore nop renames */ |
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if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) |
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return 0; |
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result = cfg80211_dev_check_name(rdev, newname); |
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if (result < 0) |
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return result; |
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result = device_rename(&rdev->wiphy.dev, newname); |
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if (result) |
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return result; |
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if (!IS_ERR_OR_NULL(rdev->wiphy.debugfsdir)) |
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debugfs_rename(rdev->wiphy.debugfsdir->d_parent, |
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rdev->wiphy.debugfsdir, |
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rdev->wiphy.debugfsdir->d_parent, newname); |
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nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); |
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return 0; |
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} |
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int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
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struct net *net) |
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{ |
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struct wireless_dev *wdev; |
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int err = 0; |
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if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
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return -EOPNOTSUPP; |
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list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
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if (!wdev->netdev) |
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continue; |
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wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
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err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); |
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if (err) |
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break; |
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wdev->netdev->features |= NETIF_F_NETNS_LOCAL; |
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} |
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if (err) { |
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/* failed -- clean up to old netns */ |
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net = wiphy_net(&rdev->wiphy); |
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list_for_each_entry_continue_reverse(wdev, |
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&rdev->wiphy.wdev_list, |
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list) { |
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if (!wdev->netdev) |
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continue; |
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wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
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err = dev_change_net_namespace(wdev->netdev, net, |
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"wlan%d"); |
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WARN_ON(err); |
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wdev->netdev->features |= NETIF_F_NETNS_LOCAL; |
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} |
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return err; |
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} |
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list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
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if (!wdev->netdev) |
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continue; |
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nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); |
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} |
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nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); |
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wiphy_net_set(&rdev->wiphy, net); |
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err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
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WARN_ON(err); |
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nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); |
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list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
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if (!wdev->netdev) |
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continue; |
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nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); |
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} |
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return 0; |
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} |
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static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
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{ |
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struct cfg80211_registered_device *rdev = data; |
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rdev_rfkill_poll(rdev); |
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} |
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void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, |
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struct wireless_dev *wdev) |
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{ |
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lockdep_assert_held(&rdev->wiphy.mtx); |
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) |
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return; |
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if (!wdev_running(wdev)) |
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return; |
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rdev_stop_p2p_device(rdev, wdev); |
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wdev->is_running = false; |
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rdev->opencount--; |
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if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
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if (WARN_ON(!rdev->scan_req->notified && |
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(!rdev->int_scan_req || |
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!rdev->int_scan_req->notified))) |
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rdev->scan_req->info.aborted = true; |
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___cfg80211_scan_done(rdev, false); |
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} |
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} |
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void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, |
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struct wireless_dev *wdev) |
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{ |
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lockdep_assert_held(&rdev->wiphy.mtx); |
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) |
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return; |
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if (!wdev_running(wdev)) |
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return; |
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rdev_stop_nan(rdev, wdev); |
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wdev->is_running = false; |
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rdev->opencount--; |
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} |
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void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) |
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{ |
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
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struct wireless_dev *wdev; |
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ASSERT_RTNL(); |
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list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
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if (wdev->netdev) { |
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dev_close(wdev->netdev); |
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continue; |
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} |
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/* otherwise, check iftype */ |
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wiphy_lock(wiphy); |
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switch (wdev->iftype) { |
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case NL80211_IFTYPE_P2P_DEVICE: |
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cfg80211_stop_p2p_device(rdev, wdev); |
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break; |
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case NL80211_IFTYPE_NAN: |
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cfg80211_stop_nan(rdev, wdev); |
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break; |
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default: |
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break; |
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} |
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wiphy_unlock(wiphy); |
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} |
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} |
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EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); |
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static int cfg80211_rfkill_set_block(void *data, bool blocked) |
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{ |
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struct cfg80211_registered_device *rdev = data; |
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if (!blocked) |
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return 0; |
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rtnl_lock(); |
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cfg80211_shutdown_all_interfaces(&rdev->wiphy); |
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rtnl_unlock(); |
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return 0; |
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} |
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static void cfg80211_rfkill_block_work(struct work_struct *work) |
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{ |
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struct cfg80211_registered_device *rdev; |
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rdev = container_of(work, struct cfg80211_registered_device, |
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rfkill_block); |
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cfg80211_rfkill_set_block(rdev, true); |
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} |
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static void cfg80211_event_work(struct work_struct *work) |
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{ |
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struct cfg80211_registered_device *rdev; |
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rdev = container_of(work, struct cfg80211_registered_device, |
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event_work); |
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wiphy_lock(&rdev->wiphy); |
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cfg80211_process_rdev_events(rdev); |
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wiphy_unlock(&rdev->wiphy); |
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} |
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void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) |
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{ |
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struct wireless_dev *wdev, *tmp; |
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bool found = false; |
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ASSERT_RTNL(); |
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list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
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if (wdev->nl_owner_dead) { |
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if (wdev->netdev) |
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dev_close(wdev->netdev); |
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found = true; |
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} |
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} |
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if (!found) |
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return; |
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wiphy_lock(&rdev->wiphy); |
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list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { |
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if (wdev->nl_owner_dead) { |
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cfg80211_leave(rdev, wdev); |
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rdev_del_virtual_intf(rdev, wdev); |
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} |
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} |
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wiphy_unlock(&rdev->wiphy); |
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} |
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static void cfg80211_destroy_iface_wk(struct work_struct *work) |
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{ |
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struct cfg80211_registered_device *rdev; |
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rdev = container_of(work, struct cfg80211_registered_device, |
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destroy_work); |
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rtnl_lock(); |
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cfg80211_destroy_ifaces(rdev); |
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rtnl_unlock(); |
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} |
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static void cfg80211_sched_scan_stop_wk(struct work_struct *work) |
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{ |
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struct cfg80211_registered_device *rdev; |
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struct cfg80211_sched_scan_request *req, *tmp; |
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rdev = container_of(work, struct cfg80211_registered_device, |
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sched_scan_stop_wk); |
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rtnl_lock(); |
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list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { |
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if (req->nl_owner_dead) |
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cfg80211_stop_sched_scan_req(rdev, req, false); |
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} |
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rtnl_unlock(); |
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} |
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static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) |
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{ |
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struct cfg80211_registered_device *rdev; |
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rdev = container_of(work, struct cfg80211_registered_device, |
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propagate_radar_detect_wk); |
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rtnl_lock(); |
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regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef, |
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NL80211_DFS_UNAVAILABLE, |
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NL80211_RADAR_DETECTED); |
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rtnl_unlock(); |
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} |
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static void cfg80211_propagate_cac_done_wk(struct work_struct *work) |
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{ |
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struct cfg80211_registered_device *rdev; |
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rdev = container_of(work, struct cfg80211_registered_device, |
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propagate_cac_done_wk); |
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rtnl_lock(); |
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regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef, |
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NL80211_DFS_AVAILABLE, |
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NL80211_RADAR_CAC_FINISHED); |
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rtnl_unlock(); |
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} |
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/* exported functions */ |
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struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, |
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const char *requested_name) |
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{ |
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static atomic_t wiphy_counter = ATOMIC_INIT(0); |
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struct cfg80211_registered_device *rdev; |
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int alloc_size; |
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WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
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WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); |
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WARN_ON(ops->connect && !ops->disconnect); |
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WARN_ON(ops->join_ibss && !ops->leave_ibss); |
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WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); |
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WARN_ON(ops->add_station && !ops->del_station); |
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WARN_ON(ops->add_mpath && !ops->del_mpath); |
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WARN_ON(ops->join_mesh && !ops->leave_mesh); |
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WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); |
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WARN_ON(ops->start_ap && !ops->stop_ap); |
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WARN_ON(ops->join_ocb && !ops->leave_ocb); |
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WARN_ON(ops->suspend && !ops->resume); |
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WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); |
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WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); |
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WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); |
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WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); |
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alloc_size = sizeof(*rdev) + sizeof_priv; |
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rdev = kzalloc(alloc_size, GFP_KERNEL); |
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if (!rdev) |
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return NULL; |
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rdev->ops = ops; |
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rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); |
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if (unlikely(rdev->wiphy_idx < 0)) { |
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/* ugh, wrapped! */ |
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atomic_dec(&wiphy_counter); |
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kfree(rdev); |
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return NULL; |
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} |
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/* atomic_inc_return makes it start at 1, make it start at 0 */ |
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rdev->wiphy_idx--; |
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/* give it a proper name */ |
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if (requested_name && requested_name[0]) { |
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int rv; |
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rtnl_lock(); |
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rv = cfg80211_dev_check_name(rdev, requested_name); |
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if (rv < 0) { |
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rtnl_unlock(); |
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goto use_default_name; |
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} |
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rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); |
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rtnl_unlock(); |
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if (rv) |
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goto use_default_name; |
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} else { |
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int rv; |
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use_default_name: |
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/* NOTE: This is *probably* safe w/out holding rtnl because of |
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* the restrictions on phy names. Probably this call could |
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* fail if some other part of the kernel (re)named a device |
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* phyX. But, might should add some locking and check return |
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* value, and use a different name if this one exists? |
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*/ |
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rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
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if (rv < 0) { |
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kfree(rdev); |
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return NULL; |
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} |
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} |
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mutex_init(&rdev->wiphy.mtx); |
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INIT_LIST_HEAD(&rdev->wiphy.wdev_list); |
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INIT_LIST_HEAD(&rdev->beacon_registrations); |
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spin_lock_init(&rdev->beacon_registrations_lock); |
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spin_lock_init(&rdev->bss_lock); |
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INIT_LIST_HEAD(&rdev->bss_list); |
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INIT_LIST_HEAD(&rdev->sched_scan_req_list); |
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INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); |
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INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, |
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cfg80211_dfs_channels_update_work); |
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#ifdef CONFIG_CFG80211_WEXT |
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rdev->wiphy.wext = &cfg80211_wext_handler; |
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#endif |
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device_initialize(&rdev->wiphy.dev); |
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rdev->wiphy.dev.class = &ieee80211_class; |
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rdev->wiphy.dev.platform_data = rdev; |
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device_enable_async_suspend(&rdev->wiphy.dev); |
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INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); |
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INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); |
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INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); |
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INIT_WORK(&rdev->propagate_radar_detect_wk, |
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cfg80211_propagate_radar_detect_wk); |
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INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); |
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INIT_WORK(&rdev->mgmt_registrations_update_wk, |
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cfg80211_mgmt_registrations_update_wk); |
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#ifdef CONFIG_CFG80211_DEFAULT_PS |
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rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; |
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#endif |
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wiphy_net_set(&rdev->wiphy, &init_net); |
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rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
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rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), |
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&rdev->wiphy.dev, RFKILL_TYPE_WLAN, |
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&rdev->rfkill_ops, rdev); |
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if (!rdev->rfkill) { |
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wiphy_free(&rdev->wiphy); |
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return NULL; |
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} |
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INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); |
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INIT_WORK(&rdev->conn_work, cfg80211_conn_work); |
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INIT_WORK(&rdev->event_work, cfg80211_event_work); |
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|
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init_waitqueue_head(&rdev->dev_wait); |
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|
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/* |
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* Initialize wiphy parameters to IEEE 802.11 MIB default values. |
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* Fragmentation and RTS threshold are disabled by default with the |
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* special -1 value. |
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*/ |
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rdev->wiphy.retry_short = 7; |
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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; |
|
} |
|
|
|
if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) |
|
return -EINVAL; |
|
|
|
/* You can't even choose that many! */ |
|
if (WARN_ON(cnt < c->max_interfaces)) |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int wiphy_register(struct wiphy *wiphy) |
|
{ |
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
|
int res; |
|
enum nl80211_band band; |
|
struct ieee80211_supported_band *sband; |
|
bool have_band = false; |
|
int i; |
|
u16 ifmodes = wiphy->interface_modes; |
|
|
|
#ifdef CONFIG_PM |
|
if (WARN_ON(wiphy->wowlan && |
|
(wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && |
|
!(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) |
|
return -EINVAL; |
|
if (WARN_ON(wiphy->wowlan && |
|
!wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && |
|
!wiphy->wowlan->tcp)) |
|
return -EINVAL; |
|
#endif |
|
if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && |
|
(!rdev->ops->tdls_channel_switch || |
|
!rdev->ops->tdls_cancel_channel_switch))) |
|
return -EINVAL; |
|
|
|
if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && |
|
(!rdev->ops->start_nan || !rdev->ops->stop_nan || |
|
!rdev->ops->add_nan_func || !rdev->ops->del_nan_func || |
|
!(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) |
|
return -EINVAL; |
|
|
|
if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) |
|
return -EINVAL; |
|
|
|
if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) |
|
return -EINVAL; |
|
|
|
if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { |
|
if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && |
|
!wiphy->pmsr_capa->ftm.non_asap)) |
|
return -EINVAL; |
|
if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || |
|
!wiphy->pmsr_capa->ftm.bandwidths)) |
|
return -EINVAL; |
|
if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & |
|
~(BIT(NL80211_PREAMBLE_LEGACY) | |
|
BIT(NL80211_PREAMBLE_HT) | |
|
BIT(NL80211_PREAMBLE_VHT) | |
|
BIT(NL80211_PREAMBLE_HE) | |
|
BIT(NL80211_PREAMBLE_DMG)))) |
|
return -EINVAL; |
|
if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || |
|
wiphy->pmsr_capa->ftm.non_trigger_based) && |
|
!(wiphy->pmsr_capa->ftm.preambles & |
|
BIT(NL80211_PREAMBLE_HE)))) |
|
return -EINVAL; |
|
if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & |
|
~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | |
|
BIT(NL80211_CHAN_WIDTH_20) | |
|
BIT(NL80211_CHAN_WIDTH_40) | |
|
BIT(NL80211_CHAN_WIDTH_80) | |
|
BIT(NL80211_CHAN_WIDTH_80P80) | |
|
BIT(NL80211_CHAN_WIDTH_160) | |
|
BIT(NL80211_CHAN_WIDTH_5) | |
|
BIT(NL80211_CHAN_WIDTH_10)))) |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* if 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 (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && |
|
rdev->ops->update_connect_params)) |
|
return -EINVAL; |
|
|
|
if (wiphy->addresses) |
|
memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); |
|
|
|
/* sanity check ifmodes */ |
|
WARN_ON(!ifmodes); |
|
ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
|
if (WARN_ON(ifmodes != wiphy->interface_modes)) |
|
wiphy->interface_modes = ifmodes; |
|
|
|
res = wiphy_verify_combinations(wiphy); |
|
if (res) |
|
return res; |
|
|
|
/* sanity check supported bands/channels */ |
|
for (band = 0; band < NUM_NL80211_BANDS; band++) { |
|
u16 types = 0; |
|
bool have_he = false; |
|
|
|
sband = wiphy->bands[band]; |
|
if (!sband) |
|
continue; |
|
|
|
sband->band = band; |
|
if (WARN_ON(!sband->n_channels)) |
|
return -EINVAL; |
|
/* |
|
* on 60GHz or sub-1Ghz band, there are no legacy rates, so |
|
* n_bitrates is 0 |
|
*/ |
|
if (WARN_ON((band != NL80211_BAND_60GHZ && |
|
band != NL80211_BAND_S1GHZ) && |
|
!sband->n_bitrates)) |
|
return -EINVAL; |
|
|
|
if (WARN_ON(band == NL80211_BAND_6GHZ && |
|
(sband->ht_cap.ht_supported || |
|
sband->vht_cap.vht_supported))) |
|
return -EINVAL; |
|
|
|
/* |
|
* Since cfg80211_disable_40mhz_24ghz is global, we can |
|
* modify the sband's ht data even if the driver uses a |
|
* global structure for that. |
|
*/ |
|
if (cfg80211_disable_40mhz_24ghz && |
|
band == NL80211_BAND_2GHZ && |
|
sband->ht_cap.ht_supported) { |
|
sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
|
sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; |
|
} |
|
|
|
/* |
|
* Since we use a u32 for rate bitmaps in |
|
* ieee80211_get_response_rate, we cannot |
|
* have more than 32 legacy rates. |
|
*/ |
|
if (WARN_ON(sband->n_bitrates > 32)) |
|
return -EINVAL; |
|
|
|
for (i = 0; i < sband->n_channels; i++) { |
|
sband->channels[i].orig_flags = |
|
sband->channels[i].flags; |
|
sband->channels[i].orig_mag = INT_MAX; |
|
sband->channels[i].orig_mpwr = |
|
sband->channels[i].max_power; |
|
sband->channels[i].band = band; |
|
|
|
if (WARN_ON(sband->channels[i].freq_offset >= 1000)) |
|
return -EINVAL; |
|
} |
|
|
|
for (i = 0; i < sband->n_iftype_data; i++) { |
|
const struct ieee80211_sband_iftype_data *iftd; |
|
|
|
iftd = &sband->iftype_data[i]; |
|
|
|
if (WARN_ON(!iftd->types_mask)) |
|
return -EINVAL; |
|
if (WARN_ON(types & iftd->types_mask)) |
|
return -EINVAL; |
|
|
|
/* at least one piece of information must be present */ |
|
if (WARN_ON(!iftd->he_cap.has_he)) |
|
return -EINVAL; |
|
|
|
types |= iftd->types_mask; |
|
|
|
if (i == 0) |
|
have_he = iftd->he_cap.has_he; |
|
else |
|
have_he = have_he && |
|
iftd->he_cap.has_he; |
|
} |
|
|
|
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 |
|
|
|
/* 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); |
|
|
|
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; |
|
wiphy_lock(&rdev->wiphy); |
|
__count = rdev->opencount; |
|
wiphy_unlock(&rdev->wiphy); |
|
__count == 0; })); |
|
|
|
if (rdev->rfkill) |
|
rfkill_unregister(rdev->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); |
|
|
|
wiphy_unlock(&rdev->wiphy); |
|
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->propagate_radar_detect_wk); |
|
flush_work(&rdev->propagate_cac_done_wk); |
|
flush_work(&rdev->mgmt_registrations_update_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); |
|
mutex_destroy(&rdev->wiphy.mtx); |
|
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_block); |
|
} |
|
EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); |
|
|
|
void cfg80211_cqm_config_free(struct wireless_dev *wdev) |
|
{ |
|
kfree(wdev->cqm_config); |
|
wdev->cqm_config = NULL; |
|
} |
|
|
|
static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, |
|
bool unregister_netdev) |
|
{ |
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
|
|
|
ASSERT_RTNL(); |
|
lockdep_assert_held(&rdev->wiphy.mtx); |
|
|
|
flush_work(&wdev->pmsr_free_wk); |
|
|
|
nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); |
|
|
|
wdev->registered = false; |
|
|
|
if (wdev->netdev) { |
|
sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211"); |
|
if (unregister_netdev) |
|
unregister_netdevice(wdev->netdev); |
|
} |
|
|
|
list_del_rcu(&wdev->list); |
|
synchronize_net(); |
|
rdev->devlist_generation++; |
|
|
|
cfg80211_mlme_purge_registrations(wdev); |
|
|
|
switch (wdev->iftype) { |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
cfg80211_stop_p2p_device(rdev, wdev); |
|
break; |
|
case NL80211_IFTYPE_NAN: |
|
cfg80211_stop_nan(rdev, wdev); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
#ifdef CONFIG_CFG80211_WEXT |
|
kfree_sensitive(wdev->wext.keys); |
|
wdev->wext.keys = NULL; |
|
#endif |
|
/* only initialized if we have a netdev */ |
|
if (wdev->netdev) |
|
flush_work(&wdev->disconnect_wk); |
|
|
|
cfg80211_cqm_config_free(wdev); |
|
|
|
/* |
|
* 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; |
|
} |
|
} |
|
|
|
void cfg80211_unregister_wdev(struct wireless_dev *wdev) |
|
{ |
|
_cfg80211_unregister_wdev(wdev, true); |
|
} |
|
EXPORT_SYMBOL(cfg80211_unregister_wdev); |
|
|
|
static const struct device_type wiphy_type = { |
|
.name = "wlan", |
|
}; |
|
|
|
void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
|
enum nl80211_iftype iftype, int num) |
|
{ |
|
lockdep_assert_held(&rdev->wiphy.mtx); |
|
|
|
rdev->num_running_ifaces += num; |
|
if (iftype == NL80211_IFTYPE_MONITOR) |
|
rdev->num_running_monitor_ifaces += num; |
|
} |
|
|
|
void __cfg80211_leave(struct cfg80211_registered_device *rdev, |
|
struct wireless_dev *wdev) |
|
{ |
|
struct net_device *dev = wdev->netdev; |
|
struct cfg80211_sched_scan_request *pos, *tmp; |
|
|
|
lockdep_assert_held(&rdev->wiphy.mtx); |
|
ASSERT_WDEV_LOCK(wdev); |
|
|
|
cfg80211_pmsr_wdev_down(wdev); |
|
|
|
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, true); |
|
break; |
|
case NL80211_IFTYPE_OCB: |
|
__cfg80211_leave_ocb(rdev, dev); |
|
break; |
|
case NL80211_IFTYPE_P2P_DEVICE: |
|
case NL80211_IFTYPE_NAN: |
|
/* cannot happen, has no netdev */ |
|
break; |
|
case NL80211_IFTYPE_AP_VLAN: |
|
case NL80211_IFTYPE_MONITOR: |
|
/* nothing to do */ |
|
break; |
|
case NL80211_IFTYPE_UNSPECIFIED: |
|
case NL80211_IFTYPE_WDS: |
|
case NUM_NL80211_IFTYPES: |
|
/* invalid */ |
|
break; |
|
} |
|
} |
|
|
|
void cfg80211_leave(struct cfg80211_registered_device *rdev, |
|
struct wireless_dev *wdev) |
|
{ |
|
wdev_lock(wdev); |
|
__cfg80211_leave(rdev, wdev); |
|
wdev_unlock(wdev); |
|
} |
|
|
|
void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, |
|
gfp_t gfp) |
|
{ |
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
|
struct cfg80211_event *ev; |
|
unsigned long flags; |
|
|
|
trace_cfg80211_stop_iface(wiphy, wdev); |
|
|
|
ev = kzalloc(sizeof(*ev), gfp); |
|
if (!ev) |
|
return; |
|
|
|
ev->type = EVENT_STOPPED; |
|
|
|
spin_lock_irqsave(&wdev->event_lock, flags); |
|
list_add_tail(&ev->list, &wdev->event_list); |
|
spin_unlock_irqrestore(&wdev->event_lock, flags); |
|
queue_work(cfg80211_wq, &rdev->event_work); |
|
} |
|
EXPORT_SYMBOL(cfg80211_stop_iface); |
|
|
|
void cfg80211_init_wdev(struct wireless_dev *wdev) |
|
{ |
|
mutex_init(&wdev->mtx); |
|
INIT_LIST_HEAD(&wdev->event_list); |
|
spin_lock_init(&wdev->event_lock); |
|
INIT_LIST_HEAD(&wdev->mgmt_registrations); |
|
spin_lock_init(&wdev->mgmt_registrations_lock); |
|
INIT_LIST_HEAD(&wdev->pmsr_list); |
|
spin_lock_init(&wdev->pmsr_lock); |
|
INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); |
|
|
|
#ifdef CONFIG_CFG80211_WEXT |
|
wdev->wext.default_key = -1; |
|
wdev->wext.default_mgmt_key = -1; |
|
wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
|
#endif |
|
|
|
if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
|
wdev->ps = true; |
|
else |
|
wdev->ps = false; |
|
/* allow mac80211 to determine the timeout */ |
|
wdev->ps_timeout = -1; |
|
|
|
if ((wdev->iftype == NL80211_IFTYPE_STATION || |
|
wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
|
wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
|
wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; |
|
|
|
INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); |
|
} |
|
|
|
void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, |
|
struct wireless_dev *wdev) |
|
{ |
|
ASSERT_RTNL(); |
|
lockdep_assert_held(&rdev->wiphy.mtx); |
|
|
|
/* |
|
* We get here also when the interface changes network namespaces, |
|
* as it's registered into the new one, but we don't want it to |
|
* change ID in that case. Checking if the ID is already assigned |
|
* works, because 0 isn't considered a valid ID and the memory is |
|
* 0-initialized. |
|
*/ |
|
if (!wdev->identifier) |
|
wdev->identifier = ++rdev->wdev_id; |
|
list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); |
|
rdev->devlist_generation++; |
|
wdev->registered = true; |
|
|
|
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; |
|
|
|
if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
|
"phy80211")) { |
|
pr_err("failed to add phy80211 symlink to netdev!\n"); |
|
unregister_netdevice(dev); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
cfg80211_register_wdev(rdev, wdev); |
|
ret = 0; |
|
out: |
|
wdev->registering = false; |
|
if (ret) |
|
wdev->registered = false; |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(cfg80211_register_netdevice); |
|
|
|
static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
|
unsigned long state, void *ptr) |
|
{ |
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
|
struct wireless_dev *wdev = dev->ieee80211_ptr; |
|
struct cfg80211_registered_device *rdev; |
|
struct cfg80211_sched_scan_request *pos, *tmp; |
|
|
|
if (!wdev) |
|
return NOTIFY_DONE; |
|
|
|
rdev = wiphy_to_rdev(wdev->wiphy); |
|
|
|
WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
|
|
|
switch (state) { |
|
case NETDEV_POST_INIT: |
|
SET_NETDEV_DEVTYPE(dev, &wiphy_type); |
|
wdev->netdev = dev; |
|
/* can only change netns with wiphy */ |
|
dev->features |= NETIF_F_NETNS_LOCAL; |
|
|
|
cfg80211_init_wdev(wdev); |
|
break; |
|
case NETDEV_REGISTER: |
|
if (!wdev->registered) { |
|
wiphy_lock(&rdev->wiphy); |
|
cfg80211_register_wdev(rdev, wdev); |
|
wiphy_unlock(&rdev->wiphy); |
|
} |
|
break; |
|
case NETDEV_UNREGISTER: |
|
/* |
|
* It is possible to get NETDEV_UNREGISTER multiple times, |
|
* so check wdev->registered. |
|
*/ |
|
if (wdev->registered && !wdev->registering) { |
|
wiphy_lock(&rdev->wiphy); |
|
_cfg80211_unregister_wdev(wdev, false); |
|
wiphy_unlock(&rdev->wiphy); |
|
} |
|
break; |
|
case NETDEV_GOING_DOWN: |
|
wiphy_lock(&rdev->wiphy); |
|
cfg80211_leave(rdev, wdev); |
|
wiphy_unlock(&rdev->wiphy); |
|
break; |
|
case NETDEV_DOWN: |
|
wiphy_lock(&rdev->wiphy); |
|
cfg80211_update_iface_num(rdev, wdev->iftype, -1); |
|
if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
|
if (WARN_ON(!rdev->scan_req->notified && |
|
(!rdev->int_scan_req || |
|
!rdev->int_scan_req->notified))) |
|
rdev->scan_req->info.aborted = true; |
|
___cfg80211_scan_done(rdev, false); |
|
} |
|
|
|
list_for_each_entry_safe(pos, tmp, |
|
&rdev->sched_scan_req_list, list) { |
|
if (WARN_ON(pos->dev == wdev->netdev)) |
|
cfg80211_stop_sched_scan_req(rdev, pos, false); |
|
} |
|
|
|
rdev->opencount--; |
|
wiphy_unlock(&rdev->wiphy); |
|
wake_up(&rdev->dev_wait); |
|
break; |
|
case NETDEV_UP: |
|
wiphy_lock(&rdev->wiphy); |
|
cfg80211_update_iface_num(rdev, wdev->iftype, 1); |
|
wdev_lock(wdev); |
|
switch (wdev->iftype) { |
|
#ifdef CONFIG_CFG80211_WEXT |
|
case NL80211_IFTYPE_ADHOC: |
|
cfg80211_ibss_wext_join(rdev, wdev); |
|
break; |
|
case NL80211_IFTYPE_STATION: |
|
cfg80211_mgd_wext_connect(rdev, wdev); |
|
break; |
|
#endif |
|
#ifdef CONFIG_MAC80211_MESH |
|
case NL80211_IFTYPE_MESH_POINT: |
|
{ |
|
/* backward compat code... */ |
|
struct mesh_setup setup; |
|
memcpy(&setup, &default_mesh_setup, |
|
sizeof(setup)); |
|
/* back compat only needed for mesh_id */ |
|
setup.mesh_id = wdev->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; |
|
} |
|
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->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; |
|
} |
|
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);
|
|
|