![Kalle Valo](/assets/img/avatar_default.png)
The most needed command from nl80211, which Wireless Extensions had, is support for power save mode. Add a simple command to make it possible to enable and disable power save via nl80211. I was also planning about extending the interface, for example adding the timeout value, but after thinking more about this I decided not to do it. Basically there were three reasons: Firstly, the parameters for power save are very much hardware dependent. Trying to find a unified interface which would work with all hardware, and still make sense to users, will be very difficult. Secondly, IEEE 802.11 power save implementation in Linux is still in state of flux. We have a long way to still to go and there is no way to predict what kind of implementation we will have after few years. And because we need to support nl80211 interface a long time, practically forever, adding now parameters to nl80211 might create maintenance problems later on. Third issue are the users. Power save parameters are mostly used for debugging, so debugfs is better, more flexible, interface for this. For example, wpa_supplicant currently doesn't configure anything related to power save mode. It's better to strive that kernel can automatically optimise the power save parameters, like with help of pm qos network and other traffic parameters. Later on, when we have better understanding of power save, we can extend this command with more features, if there's a need for that. Signed-off-by: Kalle Valo <kalle.valo@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
906 lines
22 KiB
C
906 lines
22 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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#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/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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/* 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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/* requires cfg80211_mutex to be held! */
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struct cfg80211_registered_device *
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__cfg80211_rdev_from_info(struct genl_info *info)
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{
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int ifindex;
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struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
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struct net_device *dev;
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int err = -EINVAL;
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assert_cfg80211_lock();
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if (info->attrs[NL80211_ATTR_WIPHY]) {
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bywiphyidx = cfg80211_rdev_by_wiphy_idx(
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nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
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err = -ENODEV;
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}
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if (info->attrs[NL80211_ATTR_IFINDEX]) {
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ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
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dev = dev_get_by_index(genl_info_net(info), ifindex);
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if (dev) {
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if (dev->ieee80211_ptr)
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byifidx =
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wiphy_to_dev(dev->ieee80211_ptr->wiphy);
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dev_put(dev);
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}
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err = -ENODEV;
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}
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if (bywiphyidx && byifidx) {
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if (bywiphyidx != byifidx)
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return ERR_PTR(-EINVAL);
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else
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return bywiphyidx; /* == byifidx */
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}
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if (bywiphyidx)
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return bywiphyidx;
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if (byifidx)
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return byifidx;
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return ERR_PTR(err);
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}
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struct cfg80211_registered_device *
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cfg80211_get_dev_from_info(struct genl_info *info)
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{
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struct cfg80211_registered_device *rdev;
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mutex_lock(&cfg80211_mutex);
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rdev = __cfg80211_rdev_from_info(info);
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/* if it is not an error we grab the lock on
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* it to assure it won't be going away while
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* we operate on it */
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if (!IS_ERR(rdev))
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mutex_lock(&rdev->mtx);
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mutex_unlock(&cfg80211_mutex);
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return rdev;
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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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printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
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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->netdev_list, list) {
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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->netdev_list,
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list) {
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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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}
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wiphy_net_set(&rdev->wiphy, net);
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return err;
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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->netdev_list, list)
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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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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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INIT_LIST_HEAD(&rdev->netdev_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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#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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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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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 << __NL80211_IFTYPE_AFTER_LAST) - 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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/* 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 || !sband->n_bitrates))
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return -EINVAL;
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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.
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*/
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if (WARN_ON(sband->n_bitrates > 32))
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return -EINVAL;
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for (i = 0; i < sband->n_channels; i++) {
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sband->channels[i].orig_flags =
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sband->channels[i].flags;
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sband->channels[i].orig_mag =
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sband->channels[i].max_antenna_gain;
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sband->channels[i].orig_mpwr =
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sband->channels[i].max_power;
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sband->channels[i].band = band;
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}
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have_band = true;
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}
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if (!have_band) {
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WARN_ON(1);
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return -EINVAL;
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}
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/* check and set up bitrates */
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ieee80211_set_bitrate_flags(wiphy);
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res = device_add(&rdev->wiphy.dev);
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if (res)
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return res;
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res = rfkill_register(rdev->rfkill);
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if (res)
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goto out_rm_dev;
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mutex_lock(&cfg80211_mutex);
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/* set up regulatory info */
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wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
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list_add_rcu(&rdev->list, &cfg80211_rdev_list);
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cfg80211_rdev_list_generation++;
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mutex_unlock(&cfg80211_mutex);
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/* add to debugfs */
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rdev->wiphy.debugfsdir =
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debugfs_create_dir(wiphy_name(&rdev->wiphy),
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ieee80211_debugfs_dir);
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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);
|
|
|
|
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);
|
|
|
|
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->netdev_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 */
|
|
reg_device_remove(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);
|
|
}
|
|
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);
|
|
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->dev == wdev->netdev)) {
|
|
rdev->scan_req->aborted = true;
|
|
___cfg80211_scan_done(rdev, true);
|
|
}
|
|
|
|
cfg80211_unlock_rdev(rdev);
|
|
|
|
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",
|
|
};
|
|
|
|
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;
|
|
|
|
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->action_registrations);
|
|
spin_lock_init(&wdev->action_registrations_lock);
|
|
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
list_add_rcu(&wdev->list, &rdev->netdev_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")) {
|
|
printk(KERN_ERR "wireless: 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;
|
|
wdev->ps_timeout = 100;
|
|
if (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;
|
|
}
|
|
|
|
if (!dev->ethtool_ops)
|
|
dev->ethtool_ops = &cfg80211_ethtool_ops;
|
|
|
|
if ((wdev->iftype == NL80211_IFTYPE_STATION ||
|
|
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_STATION:
|
|
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;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case NETDEV_DOWN:
|
|
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_lock_rdev(rdev);
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
#ifdef CONFIG_CFG80211_WEXT
|
|
wdev_lock(wdev);
|
|
switch (wdev->iftype) {
|
|
case NL80211_IFTYPE_ADHOC:
|
|
cfg80211_ibss_wext_join(rdev, wdev);
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
cfg80211_mgd_wext_connect(rdev, wdev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
wdev_unlock(wdev);
|
|
#endif
|
|
rdev->opencount++;
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
cfg80211_unlock_rdev(rdev);
|
|
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_actions(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);
|
|
break;
|
|
case NETDEV_PRE_UP:
|
|
if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
|
|
return notifier_from_errno(-EOPNOTSUPP);
|
|
if (rfkill_blocked(rdev->rfkill))
|
|
return notifier_from_errno(-ERFKILL);
|
|
break;
|
|
}
|
|
|
|
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 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);
|