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synced 2024-08-23 17:30:02 +00:00
![Johannes Berg](/assets/img/avatar_default.png)
When the interface type changes while connected, and the driver does not require the interface to be down for a type change, it is currently possible to get very strange results unless the driver takes special care, which it shouldn't have to. To fix this, take care to disconnect/leave IBSS when changing the interface type -- even if the driver may fail the call. Also process all events that may be pending to avoid running into a situation where an event is reported but only processed after the type has already changed, which would lead to missing events and warnings. A side effect of this is that you will have disconnected or left the IBSS even if the mode change ultimately fails, but since the intention was to change it and thus leave or disconnect, this is not a problem. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
851 lines
20 KiB
C
851 lines
20 KiB
C
/*
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* This is the linux wireless configuration interface.
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*
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* Copyright 2006-2009 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 <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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/* 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 might be appropriate here since we usually
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* only read the list, and that can happen quite
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* often because we need to do it for each command */
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LIST_HEAD(cfg80211_rdev_list);
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int cfg80211_rdev_list_generation;
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/*
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* This is used to protect the cfg80211_rdev_list
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*/
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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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/* 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.netnsok)
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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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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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rdev->wiphy.ps_default = CONFIG_CFG80211_DEFAULT_PS_VALUE;
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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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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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/* 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(&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))
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rdev->wiphy.debugfsdir = NULL;
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if (wiphy->custom_regulatory) {
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struct regulatory_request request;
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request.wiphy_idx = get_wiphy_idx(wiphy);
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request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
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request.alpha2[0] = '9';
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request.alpha2[1] = '9';
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nl80211_send_reg_change_event(&request);
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}
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cfg80211_debugfs_rdev_add(rdev);
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return 0;
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out_rm_dev:
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device_del(&rdev->wiphy.dev);
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return res;
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}
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EXPORT_SYMBOL(wiphy_register);
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void wiphy_rfkill_start_polling(struct wiphy *wiphy)
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{
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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if (!rdev->ops->rfkill_poll)
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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.
|
|
*/
|
|
cfg80211_debugfs_rdev_del(rdev);
|
|
list_del(&rdev->list);
|
|
|
|
/*
|
|
* 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);
|
|
debugfs_remove(rdev->wiphy.debugfsdir);
|
|
|
|
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 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_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);
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
list_add(&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_WIRELESS_EXT
|
|
if (!dev->wireless_handlers)
|
|
dev->wireless_handlers = &cfg80211_wext_handler;
|
|
wdev->wext.default_key = -1;
|
|
wdev->wext.default_mgmt_key = -1;
|
|
wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
|
|
wdev->wext.ps = wdev->wiphy->ps_default;
|
|
wdev->wext.ps_timeout = 100;
|
|
if (rdev->ops->set_power_mgmt)
|
|
if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
|
|
wdev->wext.ps,
|
|
wdev->wext.ps_timeout)) {
|
|
/* assume this means it's off */
|
|
wdev->wext.ps = false;
|
|
}
|
|
#endif
|
|
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_WIRELESS_EXT
|
|
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);
|
|
schedule_work(&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);
|
|
}
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
cfg80211_lock_rdev(rdev);
|
|
mutex_lock(&rdev->devlist_mtx);
|
|
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);
|
|
rdev->opencount++;
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
cfg80211_unlock_rdev(rdev);
|
|
#endif
|
|
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_init(&wdev->list);
|
|
rdev->devlist_generation++;
|
|
#ifdef CONFIG_WIRELESS_EXT
|
|
kfree(wdev->wext.keys);
|
|
#endif
|
|
}
|
|
mutex_unlock(&rdev->devlist_mtx);
|
|
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;
|
|
|
|
return 0;
|
|
|
|
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);
|
|
}
|
|
module_exit(cfg80211_exit);
|