/*
* This is the linux wireless configuration interface.
*
- * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006-2008 Johannes Berg <johannes@sipsolutions.net>
*/
#include <linux/if.h>
#include <linux/module.h>
#include <linux/err.h>
-#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/nl80211.h>
#include <linux/debugfs.h>
#include <net/genetlink.h>
#include <net/cfg80211.h>
#include <net/wireless.h>
+#include "nl80211.h"
#include "core.h"
#include "sysfs.h"
* only read the list, and that can happen quite
* often because we need to do it for each command */
LIST_HEAD(cfg80211_drv_list);
-DEFINE_MUTEX(cfg80211_drv_mutex);
-static int wiphy_counter;
+
+/*
+ * This is used to protect the cfg80211_drv_list, cfg80211_regdomain,
+ * country_ie_regdomain, the reg_beacon_list and the the last regulatory
+ * request receipt (last_request).
+ */
+DEFINE_MUTEX(cfg80211_mutex);
/* for debugfs */
static struct dentry *ieee80211_debugfs_dir;
+/* requires cfg80211_mutex to be held! */
+struct cfg80211_registered_device *cfg80211_drv_by_wiphy_idx(int wiphy_idx)
+{
+ struct cfg80211_registered_device *result = NULL, *drv;
+
+ if (!wiphy_idx_valid(wiphy_idx))
+ return NULL;
+
+ assert_cfg80211_lock();
+
+ list_for_each_entry(drv, &cfg80211_drv_list, list) {
+ if (drv->wiphy_idx == wiphy_idx) {
+ result = drv;
+ break;
+ }
+ }
+
+ return result;
+}
+
+int get_wiphy_idx(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *drv;
+ if (!wiphy)
+ return WIPHY_IDX_STALE;
+ drv = wiphy_to_dev(wiphy);
+ return drv->wiphy_idx;
+}
+
+/* requires cfg80211_drv_mutex to be held! */
+struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
+{
+ struct cfg80211_registered_device *drv;
+
+ if (!wiphy_idx_valid(wiphy_idx))
+ return NULL;
+
+ assert_cfg80211_lock();
+
+ drv = cfg80211_drv_by_wiphy_idx(wiphy_idx);
+ if (!drv)
+ return NULL;
+ return &drv->wiphy;
+}
+
+/* requires cfg80211_mutex to be held! */
+struct cfg80211_registered_device *
+__cfg80211_drv_from_info(struct genl_info *info)
+{
+ int ifindex;
+ struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
+ struct net_device *dev;
+ int err = -EINVAL;
+
+ assert_cfg80211_lock();
+
+ if (info->attrs[NL80211_ATTR_WIPHY]) {
+ bywiphyidx = cfg80211_drv_by_wiphy_idx(
+ nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
+ err = -ENODEV;
+ }
+
+ if (info->attrs[NL80211_ATTR_IFINDEX]) {
+ ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
+ dev = dev_get_by_index(&init_net, ifindex);
+ if (dev) {
+ if (dev->ieee80211_ptr)
+ byifidx =
+ wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+ dev_put(dev);
+ }
+ err = -ENODEV;
+ }
+
+ if (bywiphyidx && byifidx) {
+ if (bywiphyidx != byifidx)
+ return ERR_PTR(-EINVAL);
+ else
+ return bywiphyidx; /* == byifidx */
+ }
+ if (bywiphyidx)
+ return bywiphyidx;
+
+ if (byifidx)
+ return byifidx;
+
+ return ERR_PTR(err);
+}
+
+struct cfg80211_registered_device *
+cfg80211_get_dev_from_info(struct genl_info *info)
+{
+ struct cfg80211_registered_device *drv;
+
+ mutex_lock(&cfg80211_mutex);
+ drv = __cfg80211_drv_from_info(info);
+
+ /* if it is not an error we grab the lock on
+ * it to assure it won't be going away while
+ * we operate on it */
+ if (!IS_ERR(drv))
+ mutex_lock(&drv->mtx);
+
+ mutex_unlock(&cfg80211_mutex);
+
+ return drv;
+}
+
+struct cfg80211_registered_device *
+cfg80211_get_dev_from_ifindex(int ifindex)
+{
+ struct cfg80211_registered_device *drv = ERR_PTR(-ENODEV);
+ struct net_device *dev;
+
+ mutex_lock(&cfg80211_mutex);
+ dev = dev_get_by_index(&init_net, ifindex);
+ if (!dev)
+ goto out;
+ if (dev->ieee80211_ptr) {
+ drv = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+ mutex_lock(&drv->mtx);
+ } else
+ drv = ERR_PTR(-ENODEV);
+ dev_put(dev);
+ out:
+ mutex_unlock(&cfg80211_mutex);
+ return drv;
+}
+
+void cfg80211_put_dev(struct cfg80211_registered_device *drv)
+{
+ BUG_ON(IS_ERR(drv));
+ mutex_unlock(&drv->mtx);
+}
+
+/* requires cfg80211_mutex to be held */
+int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
+ char *newname)
+{
+ struct cfg80211_registered_device *drv;
+ int wiphy_idx, taken = -1, result, digits;
+
+ assert_cfg80211_lock();
+
+ /* prohibit calling the thing phy%d when %d is not its number */
+ sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
+ if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
+ /* count number of places needed to print wiphy_idx */
+ digits = 1;
+ while (wiphy_idx /= 10)
+ digits++;
+ /*
+ * deny the name if it is phy<idx> where <idx> is printed
+ * without leading zeroes. taken == strlen(newname) here
+ */
+ if (taken == strlen(PHY_NAME) + digits)
+ return -EINVAL;
+ }
+
+
+ /* Ignore nop renames */
+ if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
+ return 0;
+
+ /* Ensure another device does not already have this name. */
+ list_for_each_entry(drv, &cfg80211_drv_list, list)
+ if (strcmp(newname, dev_name(&drv->wiphy.dev)) == 0)
+ return -EINVAL;
+
+ result = device_rename(&rdev->wiphy.dev, newname);
+ if (result)
+ return result;
+
+ if (rdev->wiphy.debugfsdir &&
+ !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
+ rdev->wiphy.debugfsdir,
+ rdev->wiphy.debugfsdir->d_parent,
+ newname))
+ printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
+ newname);
+
+ nl80211_notify_dev_rename(rdev);
+
+ return 0;
+}
+
/* exported functions */
struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
{
+ static int wiphy_counter;
+
struct cfg80211_registered_device *drv;
int alloc_size;
+ WARN_ON(!ops->add_key && ops->del_key);
+ WARN_ON(ops->add_key && !ops->del_key);
+
alloc_size = sizeof(*drv) + sizeof_priv;
drv = kzalloc(alloc_size, GFP_KERNEL);
drv->ops = ops;
- mutex_lock(&cfg80211_drv_mutex);
+ mutex_lock(&cfg80211_mutex);
- drv->idx = wiphy_counter;
+ drv->wiphy_idx = wiphy_counter++;
- /* now increase counter for the next device unless
- * it has wrapped previously */
- if (wiphy_counter >= 0)
- wiphy_counter++;
-
- mutex_unlock(&cfg80211_drv_mutex);
-
- if (unlikely(drv->idx < 0)) {
+ if (unlikely(!wiphy_idx_valid(drv->wiphy_idx))) {
+ wiphy_counter--;
+ mutex_unlock(&cfg80211_mutex);
/* ugh, wrapped! */
kfree(drv);
return NULL;
}
+ mutex_unlock(&cfg80211_mutex);
+
/* give it a proper name */
- snprintf(drv->wiphy.dev.bus_id, BUS_ID_SIZE,
- PHY_NAME "%d", drv->idx);
+ dev_set_name(&drv->wiphy.dev, PHY_NAME "%d", drv->wiphy_idx);
mutex_init(&drv->mtx);
mutex_init(&drv->devlist_mtx);
INIT_LIST_HEAD(&drv->netdev_list);
+ spin_lock_init(&drv->bss_lock);
+ INIT_LIST_HEAD(&drv->bss_list);
device_initialize(&drv->wiphy.dev);
drv->wiphy.dev.class = &ieee80211_class;
{
struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
int res;
+ enum ieee80211_band band;
+ struct ieee80211_supported_band *sband;
+ bool have_band = false;
+ int i;
+ u16 ifmodes = wiphy->interface_modes;
+
+ if (WARN_ON(wiphy->max_scan_ssids < 1))
+ return -EINVAL;
+
+ /* sanity check ifmodes */
+ WARN_ON(!ifmodes);
+ ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
+ if (WARN_ON(ifmodes != wiphy->interface_modes))
+ wiphy->interface_modes = ifmodes;
+
+ /* 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 || !sband->n_bitrates))
+ return -EINVAL;
+
+ /*
+ * 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 =
+ sband->channels[i].max_antenna_gain;
+ sband->channels[i].orig_mpwr =
+ sband->channels[i].max_power;
+ sband->channels[i].band = band;
+ }
+
+ have_band = true;
+ }
- mutex_lock(&cfg80211_drv_mutex);
+ if (!have_band) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ /* check and set up bitrates */
+ ieee80211_set_bitrate_flags(wiphy);
+
+ mutex_lock(&cfg80211_mutex);
+
+ /* set up regulatory info */
+ wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
res = device_add(&drv->wiphy.dev);
if (res)
drv->wiphy.debugfsdir =
debugfs_create_dir(wiphy_name(&drv->wiphy),
ieee80211_debugfs_dir);
+ if (IS_ERR(drv->wiphy.debugfsdir))
+ drv->wiphy.debugfsdir = NULL;
+
+ if (wiphy->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);
+ }
res = 0;
out_unlock:
- mutex_unlock(&cfg80211_drv_mutex);
+ mutex_unlock(&cfg80211_mutex);
return res;
}
EXPORT_SYMBOL(wiphy_register);
struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy);
/* protect the device list */
- mutex_lock(&cfg80211_drv_mutex);
+ mutex_lock(&cfg80211_mutex);
BUG_ON(!list_empty(&drv->netdev_list));
/* unlock again before freeing */
mutex_unlock(&drv->mtx);
+ /* 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);
+
list_del(&drv->list);
device_del(&drv->wiphy.dev);
debugfs_remove(drv->wiphy.debugfsdir);
- mutex_unlock(&cfg80211_drv_mutex);
+ mutex_unlock(&cfg80211_mutex);
}
EXPORT_SYMBOL(wiphy_unregister);
void cfg80211_dev_free(struct cfg80211_registered_device *drv)
{
+ struct cfg80211_internal_bss *scan, *tmp;
mutex_destroy(&drv->mtx);
mutex_destroy(&drv->devlist_mtx);
+ list_for_each_entry_safe(scan, tmp, &drv->bss_list, list)
+ cfg80211_put_bss(&scan->pub);
kfree(drv);
}
rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
+ WARN_ON(dev->ieee80211_ptr->iftype == NL80211_IFTYPE_UNSPECIFIED);
+
switch (state) {
case NETDEV_REGISTER:
mutex_lock(&rdev->devlist_mtx);
static int cfg80211_init(void)
{
- int err = wiphy_sysfs_init();
+ int err;
+
+ err = wiphy_sysfs_init();
if (err)
goto out_fail_sysfs;
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:
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();
}
module_exit(cfg80211_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff