![Daniel Drake](/assets/img/avatar_default.png)
libertas currently calls cfg80211_disconnected() when it is being brought down. This causes an event to be allocated, but since the wdev is already removed from the rdev by the time that the event processing work executes, the event is never processed or freed. http://article.gmane.org/gmane.linux.kernel.wireless.general/95666 Fix this leak, and other possible situations, by processing the event queue when a device is being unregistered. Thanks to Johannes Berg for the suggestion. Signed-off-by: Daniel Drake <dsd@laptop.org> Cc: stable@vger.kernel.org Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1057 lines
26 KiB
C
1057 lines
26 KiB
C
/*
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* This is the linux wireless configuration interface.
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*
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* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
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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 "ethtool.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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/* RCU-protected (and cfg80211_mutex for writers) */
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LIST_HEAD(cfg80211_rdev_list);
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int cfg80211_rdev_list_generation;
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DEFINE_MUTEX(cfg80211_mutex);
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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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/* requires cfg80211_mutex to be held! */
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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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if (!wiphy_idx_valid(wiphy_idx))
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return NULL;
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assert_cfg80211_lock();
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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;
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if (!wiphy)
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return WIPHY_IDX_STALE;
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rdev = wiphy_to_dev(wiphy);
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return rdev->wiphy_idx;
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}
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/* requires cfg80211_rdev_mutex to be held! */
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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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if (!wiphy_idx_valid(wiphy_idx))
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return NULL;
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assert_cfg80211_lock();
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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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struct cfg80211_registered_device *
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cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
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{
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struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
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struct net_device *dev;
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mutex_lock(&cfg80211_mutex);
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dev = dev_get_by_index(net, ifindex);
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if (!dev)
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goto out;
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if (dev->ieee80211_ptr) {
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rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
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mutex_lock(&rdev->mtx);
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} else
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rdev = ERR_PTR(-ENODEV);
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dev_put(dev);
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out:
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mutex_unlock(&cfg80211_mutex);
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return rdev;
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}
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/* requires cfg80211_mutex to be held */
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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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struct cfg80211_registered_device *rdev2;
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int wiphy_idx, taken = -1, result, digits;
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assert_cfg80211_lock();
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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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/* Ignore nop renames */
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if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
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return 0;
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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, dev_name(&rdev2->wiphy.dev)) == 0)
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return -EINVAL;
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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 (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,
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newname))
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pr_err("failed to rename debugfs dir to %s!\n", newname);
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nl80211_notify_dev_rename(rdev);
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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->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, &rdev->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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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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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->ops->rfkill_poll(&rdev->wiphy);
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}
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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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struct wireless_dev *wdev;
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if (!blocked)
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return 0;
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rtnl_lock();
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mutex_lock(&rdev->devlist_mtx);
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list_for_each_entry(wdev, &rdev->wdev_list, list)
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if (wdev->netdev)
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dev_close(wdev->netdev);
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mutex_unlock(&rdev->devlist_mtx);
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rtnl_unlock();
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return 0;
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}
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static void cfg80211_rfkill_sync_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, rfkill_sync);
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cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
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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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rtnl_lock();
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cfg80211_lock_rdev(rdev);
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cfg80211_process_rdev_events(rdev);
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cfg80211_unlock_rdev(rdev);
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rtnl_unlock();
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}
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/* exported functions */
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struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
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{
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static int wiphy_counter;
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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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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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mutex_lock(&cfg80211_mutex);
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rdev->wiphy_idx = wiphy_counter++;
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if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
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wiphy_counter--;
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mutex_unlock(&cfg80211_mutex);
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/* ugh, wrapped! */
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kfree(rdev);
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return NULL;
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}
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mutex_unlock(&cfg80211_mutex);
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/* give it a proper name */
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dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
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mutex_init(&rdev->mtx);
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mutex_init(&rdev->devlist_mtx);
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mutex_init(&rdev->sched_scan_mtx);
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INIT_LIST_HEAD(&rdev->wdev_list);
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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_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
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INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
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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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#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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kfree(rdev);
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return NULL;
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}
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INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_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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init_waitqueue_head(&rdev->dev_wait);
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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;
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rdev->wiphy.frag_threshold = (u32) -1;
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rdev->wiphy.rts_threshold = (u32) -1;
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rdev->wiphy.coverage_class = 0;
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return &rdev->wiphy;
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}
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EXPORT_SYMBOL(wiphy_new);
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static int wiphy_verify_combinations(struct wiphy *wiphy)
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{
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const struct ieee80211_iface_combination *c;
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int i, j;
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for (i = 0; i < wiphy->n_iface_combinations; i++) {
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u32 cnt = 0;
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u16 all_iftypes = 0;
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c = &wiphy->iface_combinations[i];
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/* Combinations with just one interface aren't real */
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if (WARN_ON(c->max_interfaces < 2))
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return -EINVAL;
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/* Need at least one channel */
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if (WARN_ON(!c->num_different_channels))
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return -EINVAL;
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/*
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* Put a sane limit on maximum number of different
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* channels to simplify channel accounting code.
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*/
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if (WARN_ON(c->num_different_channels >
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CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
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return -EINVAL;
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if (WARN_ON(!c->n_limits))
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return -EINVAL;
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for (j = 0; j < c->n_limits; j++) {
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u16 types = c->limits[j].types;
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/*
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* interface types shouldn't overlap, this is
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* used in cfg80211_can_change_interface()
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*/
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if (WARN_ON(types & all_iftypes))
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return -EINVAL;
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all_iftypes |= types;
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if (WARN_ON(!c->limits[j].max))
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return -EINVAL;
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/* Shouldn't list software iftypes in combinations! */
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if (WARN_ON(wiphy->software_iftypes & types))
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return -EINVAL;
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cnt += c->limits[j].max;
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/*
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* Don't advertise an unsupported type
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* in a combination.
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*/
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if (WARN_ON((wiphy->interface_modes & types) != types))
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return -EINVAL;
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}
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/* You can't even choose that many! */
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if (WARN_ON(cnt < c->max_interfaces))
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return -EINVAL;
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}
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return 0;
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}
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int wiphy_register(struct wiphy *wiphy)
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{
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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int res;
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enum ieee80211_band band;
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struct ieee80211_supported_band *sband;
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bool have_band = false;
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int i;
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u16 ifmodes = wiphy->interface_modes;
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#ifdef CONFIG_PM
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if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
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!(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
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return -EINVAL;
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#endif
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if (WARN_ON(wiphy->ap_sme_capa &&
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!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
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return -EINVAL;
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if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
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return -EINVAL;
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if (WARN_ON(wiphy->addresses &&
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!is_zero_ether_addr(wiphy->perm_addr) &&
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memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
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ETH_ALEN)))
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return -EINVAL;
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if (wiphy->addresses)
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memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
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/* sanity check ifmodes */
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WARN_ON(!ifmodes);
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ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
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if (WARN_ON(ifmodes != wiphy->interface_modes))
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wiphy->interface_modes = ifmodes;
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res = wiphy_verify_combinations(wiphy);
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if (res)
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return res;
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/* sanity check supported bands/channels */
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for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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sband = wiphy->bands[band];
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if (!sband)
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continue;
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sband->band = band;
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if (WARN_ON(!sband->n_channels))
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return -EINVAL;
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/*
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* on 60gHz band, there are no legacy rates, so
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* n_bitrates is 0
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*/
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if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
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!sband->n_bitrates))
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return -EINVAL;
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/*
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* Since cfg80211_disable_40mhz_24ghz is global, we can
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* modify the sband's ht data even if the driver uses a
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* global structure for that.
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*/
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if (cfg80211_disable_40mhz_24ghz &&
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band == IEEE80211_BAND_2GHZ &&
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sband->ht_cap.ht_supported) {
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sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
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sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
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}
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/*
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* Since we use a u32 for rate bitmaps in
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* ieee80211_get_response_rate, we cannot
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* 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 =
|
|
sband->channels[i].max_antenna_gain;
|
|
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 (rdev->wiphy.wowlan.n_patterns) {
|
|
if (WARN_ON(!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);
|
|
|
|
mutex_lock(&cfg80211_mutex);
|
|
|
|
res = device_add(&rdev->wiphy.dev);
|
|
if (res) {
|
|
mutex_unlock(&cfg80211_mutex);
|
|
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;
|
|
|
|
if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
|
|
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);
|
|
}
|
|
|
|
cfg80211_debugfs_rdev_add(rdev);
|
|
mutex_unlock(&cfg80211_mutex);
|
|
|
|
/*
|
|
* due to a locking dependency this has to be outside of the
|
|
* cfg80211_mutex lock
|
|
*/
|
|
res = rfkill_register(rdev->rfkill);
|
|
if (res)
|
|
goto out_rm_dev;
|
|
|
|
rtnl_lock();
|
|
rdev->wiphy.registered = true;
|
|
rtnl_unlock();
|
|
return 0;
|
|
|
|
out_rm_dev:
|
|
device_del(&rdev->wiphy.dev);
|
|
return res;
|
|
}
|
|
EXPORT_SYMBOL(wiphy_register);
|
|
|
|
void wiphy_rfkill_start_polling(struct wiphy *wiphy)
|
|
{
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(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_dev(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_dev(wiphy);
|
|
|
|
rtnl_lock();
|
|
rdev->wiphy.registered = false;
|
|
rtnl_unlock();
|
|
|
|
rfkill_unregister(rdev->rfkill);
|
|
|
|
/* protect the device list */
|
|
mutex_lock(&cfg80211_mutex);
|
|
|
|
wait_event(rdev->dev_wait, ({
|
|
int __count;
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
__count = rdev->opencount;
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
__count == 0; }));
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
BUG_ON(!list_empty(&rdev->wdev_list));
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
|
|
/*
|
|
* 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();
|
|
|
|
/*
|
|
* Try to grab rdev->mtx. If a command is still in progress,
|
|
* hopefully the driver will refuse it since it's tearing
|
|
* down the device already. We wait for this command to complete
|
|
* before unlinking the item from the list.
|
|
* Note: as codified by the BUG_ON above we cannot get here if
|
|
* a virtual interface is still present. Hence, we can only get
|
|
* to lock contention here if userspace issues a command that
|
|
* identified the hardware by wiphy index.
|
|
*/
|
|
cfg80211_lock_rdev(rdev);
|
|
/* nothing */
|
|
cfg80211_unlock_rdev(rdev);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
mutex_unlock(&cfg80211_mutex);
|
|
|
|
flush_work(&rdev->scan_done_wk);
|
|
cancel_work_sync(&rdev->conn_work);
|
|
flush_work(&rdev->event_work);
|
|
|
|
if (rdev->wowlan && rdev->ops->set_wakeup)
|
|
rdev->ops->set_wakeup(&rdev->wiphy, false);
|
|
cfg80211_rdev_free_wowlan(rdev);
|
|
}
|
|
EXPORT_SYMBOL(wiphy_unregister);
|
|
|
|
void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
|
|
{
|
|
struct cfg80211_internal_bss *scan, *tmp;
|
|
rfkill_destroy(rdev->rfkill);
|
|
mutex_destroy(&rdev->mtx);
|
|
mutex_destroy(&rdev->devlist_mtx);
|
|
mutex_destroy(&rdev->sched_scan_mtx);
|
|
list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
|
|
cfg80211_put_bss(&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_dev(wiphy);
|
|
|
|
if (rfkill_set_hw_state(rdev->rfkill, blocked))
|
|
schedule_work(&rdev->rfkill_sync);
|
|
}
|
|
EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
|
|
|
|
static void wdev_cleanup_work(struct work_struct *work)
|
|
{
|
|
struct wireless_dev *wdev;
|
|
struct cfg80211_registered_device *rdev;
|
|
|
|
wdev = container_of(work, struct wireless_dev, cleanup_work);
|
|
rdev = wiphy_to_dev(wdev->wiphy);
|
|
|
|
cfg80211_lock_rdev(rdev);
|
|
|
|
if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
|
|
rdev->scan_req->aborted = true;
|
|
___cfg80211_scan_done(rdev, true);
|
|
}
|
|
|
|
cfg80211_unlock_rdev(rdev);
|
|
|
|
mutex_lock(&rdev->sched_scan_mtx);
|
|
|
|
if (WARN_ON(rdev->sched_scan_req &&
|
|
rdev->sched_scan_req->dev == wdev->netdev)) {
|
|
__cfg80211_stop_sched_scan(rdev, false);
|
|
}
|
|
|
|
mutex_unlock(&rdev->sched_scan_mtx);
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
rdev->opencount--;
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
wake_up(&rdev->dev_wait);
|
|
|
|
dev_put(wdev->netdev);
|
|
}
|
|
|
|
static 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;
|
|
}
|
|
|
|
static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
|
|
unsigned long state,
|
|
void *ndev)
|
|
{
|
|
struct net_device *dev = ndev;
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_registered_device *rdev;
|
|
int ret;
|
|
|
|
if (!wdev)
|
|
return NOTIFY_DONE;
|
|
|
|
rdev = wiphy_to_dev(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_WORK(&wdev->cleanup_work, wdev_cleanup_work);
|
|
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);
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
wdev->identifier = ++rdev->wdev_id;
|
|
list_add_rcu(&wdev->list, &rdev->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;
|
|
wdev->sme_state = CFG80211_SME_IDLE;
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
#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 (!dev->ethtool_ops)
|
|
dev->ethtool_ops = &cfg80211_ethtool_ops;
|
|
|
|
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;
|
|
break;
|
|
case NETDEV_GOING_DOWN:
|
|
switch (wdev->iftype) {
|
|
case NL80211_IFTYPE_ADHOC:
|
|
cfg80211_leave_ibss(rdev, dev, true);
|
|
break;
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
case NL80211_IFTYPE_STATION:
|
|
mutex_lock(&rdev->sched_scan_mtx);
|
|
__cfg80211_stop_sched_scan(rdev, false);
|
|
mutex_unlock(&rdev->sched_scan_mtx);
|
|
|
|
wdev_lock(wdev);
|
|
#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);
|
|
cfg80211_mlme_down(rdev, dev);
|
|
wdev_unlock(wdev);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
cfg80211_leave_mesh(rdev, dev);
|
|
break;
|
|
case NL80211_IFTYPE_AP:
|
|
cfg80211_stop_ap(rdev, dev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
wdev->beacon_interval = 0;
|
|
break;
|
|
case NETDEV_DOWN:
|
|
cfg80211_update_iface_num(rdev, wdev->iftype, -1);
|
|
dev_hold(dev);
|
|
queue_work(cfg80211_wq, &wdev->cleanup_work);
|
|
break;
|
|
case NETDEV_UP:
|
|
/*
|
|
* If we have a really quick DOWN/UP succession we may
|
|
* have this work still pending ... cancel it and see
|
|
* if it was pending, in which case we need to account
|
|
* for some of the work it would have done.
|
|
*/
|
|
if (cancel_work_sync(&wdev->cleanup_work)) {
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
rdev->opencount--;
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
dev_put(dev);
|
|
}
|
|
cfg80211_update_iface_num(rdev, wdev->iftype, 1);
|
|
cfg80211_lock_rdev(rdev);
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
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++;
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
cfg80211_unlock_rdev(rdev);
|
|
|
|
/*
|
|
* 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)
|
|
if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
|
|
wdev->ps,
|
|
wdev->ps_timeout)) {
|
|
/* assume this means it's off */
|
|
wdev->ps = false;
|
|
}
|
|
break;
|
|
case NETDEV_UNREGISTER:
|
|
/*
|
|
* NB: cannot take rdev->mtx here because this may be
|
|
* called within code protected by it when interfaces
|
|
* are removed with nl80211.
|
|
*/
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
/*
|
|
* 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)) {
|
|
sysfs_remove_link(&dev->dev.kobj, "phy80211");
|
|
list_del_rcu(&wdev->list);
|
|
rdev->devlist_generation++;
|
|
cfg80211_mlme_purge_registrations(wdev);
|
|
#ifdef CONFIG_CFG80211_WEXT
|
|
kfree(wdev->wext.keys);
|
|
#endif
|
|
}
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
/*
|
|
* 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);
|
|
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);
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
ret = cfg80211_can_add_interface(rdev, wdev->iftype);
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
if (ret)
|
|
return notifier_from_errno(ret);
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
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();
|
|
mutex_lock(&cfg80211_mutex);
|
|
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));
|
|
}
|
|
mutex_unlock(&cfg80211_mutex);
|
|
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 = create_singlethread_workqueue("cfg80211");
|
|
if (!cfg80211_wq)
|
|
goto out_fail_wq;
|
|
|
|
return 0;
|
|
|
|
out_fail_wq:
|
|
regulatory_exit();
|
|
out_fail_reg:
|
|
debugfs_remove(ieee80211_debugfs_dir);
|
|
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);
|