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2430816b4e
When the interface goes down, there's no need to call cfg80211_mlme_down() after __cfg80211_disconnect() as the latter will call the former (if appropriate.) Also, in __cfg80211_disconnect(), if the cfg80211 SME isn't used, __cfg80211_disconnected() may still need to be called (depending on the current state) so that the SME state gets cleared. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1165 lines
29 KiB
C
1165 lines
29 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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#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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/* 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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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 = 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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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_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->devlist_mtx);
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lockdep_assert_held(&rdev->sched_scan_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->p2p_started)
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return;
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rdev_stop_p2p_device(rdev, wdev);
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wdev->p2p_started = false;
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rdev->opencount--;
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if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
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bool busy = work_busy(&rdev->scan_done_wk);
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/*
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* If the work isn't pending or running (in which case it would
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* be waiting for the lock we hold) the driver didn't properly
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* cancel the scan when the interface was removed. In this case
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* warn and leak the scan request object to not crash later.
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*/
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WARN_ON(!busy);
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rdev->scan_req->aborted = true;
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___cfg80211_scan_done(rdev, !busy);
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}
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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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/* read-only iteration need not hold the 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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continue;
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}
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/* otherwise, check iftype */
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switch (wdev->iftype) {
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case NL80211_IFTYPE_P2P_DEVICE:
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/* but this requires it */
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mutex_lock(&rdev->devlist_mtx);
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mutex_lock(&rdev->sched_scan_mtx);
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cfg80211_stop_p2p_device(rdev, wdev);
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mutex_unlock(&rdev->sched_scan_mtx);
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mutex_unlock(&rdev->devlist_mtx);
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break;
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default:
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break;
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}
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}
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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(rdev->wiphy_idx < 0)) {
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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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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_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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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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#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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rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH;
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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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/*
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* Combinations with just one interface aren't real,
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* however we make an exception for DFS.
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*/
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if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
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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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/* DFS only works on one channel. */
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if (WARN_ON(c->radar_detect_widths &&
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(c->num_different_channels > 1)))
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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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/* Only a single P2P_DEVICE can be allowed */
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if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
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c->limits[j].max > 1))
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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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|
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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 &&
|
|
!(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;
|
|
|
|
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 < IEEE80211_NUM_BANDS; band++) {
|
|
sband = wiphy->bands[band];
|
|
if (!sband)
|
|
continue;
|
|
|
|
sband->band = band;
|
|
if (WARN_ON(!sband->n_channels))
|
|
return -EINVAL;
|
|
/*
|
|
* on 60gHz band, there are no legacy rates, so
|
|
* n_bitrates is 0
|
|
*/
|
|
if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
|
|
!sband->n_bitrates))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Since cfg80211_disable_40mhz_24ghz is global, we can
|
|
* modify the sband's ht data even if the driver uses a
|
|
* global structure for that.
|
|
*/
|
|
if (cfg80211_disable_40mhz_24ghz &&
|
|
band == IEEE80211_BAND_2GHZ &&
|
|
sband->ht_cap.ht_supported) {
|
|
sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
|
|
sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
|
|
}
|
|
|
|
/*
|
|
* Since we use a u32 for rate bitmaps in
|
|
* ieee80211_get_response_rate, we cannot
|
|
* have more than 32 legacy rates.
|
|
*/
|
|
if (WARN_ON(sband->n_bitrates > 32))
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < sband->n_channels; i++) {
|
|
sband->channels[i].orig_flags =
|
|
sband->channels[i].flags;
|
|
sband->channels[i].orig_mag = INT_MAX;
|
|
sband->channels[i].orig_mpwr =
|
|
sband->channels[i].max_power;
|
|
sband->channels[i].band = band;
|
|
}
|
|
|
|
have_band = true;
|
|
}
|
|
|
|
if (!have_band) {
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
if (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) {
|
|
device_del(&rdev->wiphy.dev);
|
|
|
|
mutex_lock(&cfg80211_mutex);
|
|
debugfs_remove_recursive(rdev->wiphy.debugfsdir);
|
|
list_del_rcu(&rdev->list);
|
|
wiphy_regulatory_deregister(wiphy);
|
|
mutex_unlock(&cfg80211_mutex);
|
|
return res;
|
|
}
|
|
|
|
rtnl_lock();
|
|
rdev->wiphy.registered = true;
|
|
rtnl_unlock();
|
|
return 0;
|
|
}
|
|
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);
|
|
cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
|
|
|
|
if (rdev->wowlan && rdev->ops->set_wakeup)
|
|
rdev_set_wakeup(rdev, 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;
|
|
struct cfg80211_beacon_registration *reg, *treg;
|
|
rfkill_destroy(rdev->rfkill);
|
|
mutex_destroy(&rdev->mtx);
|
|
mutex_destroy(&rdev->devlist_mtx);
|
|
mutex_destroy(&rdev->sched_scan_mtx);
|
|
list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
|
|
list_del(®->list);
|
|
kfree(reg);
|
|
}
|
|
list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
|
|
cfg80211_put_bss(&rdev->wiphy, &scan->pub);
|
|
kfree(rdev);
|
|
}
|
|
|
|
void wiphy_free(struct wiphy *wiphy)
|
|
{
|
|
put_device(&wiphy->dev);
|
|
}
|
|
EXPORT_SYMBOL(wiphy_free);
|
|
|
|
void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
|
|
{
|
|
struct cfg80211_registered_device *rdev = wiphy_to_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);
|
|
|
|
mutex_lock(&rdev->sched_scan_mtx);
|
|
|
|
if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
|
|
rdev->scan_req->aborted = true;
|
|
___cfg80211_scan_done(rdev, true);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void cfg80211_unregister_wdev(struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
|
|
|
|
ASSERT_RTNL();
|
|
|
|
if (WARN_ON(wdev->netdev))
|
|
return;
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
mutex_lock(&rdev->sched_scan_mtx);
|
|
list_del_rcu(&wdev->list);
|
|
rdev->devlist_generation++;
|
|
|
|
switch (wdev->iftype) {
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
cfg80211_stop_p2p_device(rdev, wdev);
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
break;
|
|
}
|
|
mutex_unlock(&rdev->sched_scan_mtx);
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_unregister_wdev);
|
|
|
|
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;
|
|
}
|
|
|
|
void cfg80211_leave(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev)
|
|
{
|
|
struct net_device *dev = wdev->netdev;
|
|
|
|
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);
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
netdev_set_default_ethtool_ops(dev, &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:
|
|
cfg80211_leave(rdev, wdev);
|
|
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);
|
|
mutex_lock(&rdev->sched_scan_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);
|
|
mutex_unlock(&rdev->sched_scan_mtx);
|
|
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_set_power_mgmt(rdev, 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) {
|
|
err = -ENOMEM;
|
|
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);
|