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Diffstat (limited to 'net/wireless/core.c')
-rw-r--r--net/wireless/core.c162
1 files changed, 107 insertions, 55 deletions
diff --git a/net/wireless/core.c b/net/wireless/core.c
index b96fc0c3f1c4..d1f556535f6d 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -7,7 +7,6 @@
 #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>
@@ -31,18 +30,29 @@ MODULE_DESCRIPTION("wireless configuration support");
  * 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);
+
+/*
+ * 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_drv_mutex to be held! */
-static struct cfg80211_registered_device *cfg80211_drv_by_wiphy(int wiphy)
+/* 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->idx == wiphy) {
+		if (drv->wiphy_idx == wiphy_idx) {
 			result = drv;
 			break;
 		}
@@ -51,17 +61,44 @@ static struct cfg80211_registered_device *cfg80211_drv_by_wiphy(int wiphy)
 	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! */
-static struct cfg80211_registered_device *
+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 *bywiphy = NULL, *byifidx = NULL;
+	struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
 	struct net_device *dev;
 	int err = -EINVAL;
 
+	assert_cfg80211_lock();
+
 	if (info->attrs[NL80211_ATTR_WIPHY]) {
-		bywiphy = cfg80211_drv_by_wiphy(
+		bywiphyidx = cfg80211_drv_by_wiphy_idx(
 				nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
 		err = -ENODEV;
 	}
@@ -78,14 +115,14 @@ __cfg80211_drv_from_info(struct genl_info *info)
 		err = -ENODEV;
 	}
 
-	if (bywiphy && byifidx) {
-		if (bywiphy != byifidx)
+	if (bywiphyidx && byifidx) {
+		if (bywiphyidx != byifidx)
 			return ERR_PTR(-EINVAL);
 		else
-			return bywiphy; /* == byifidx */
+			return bywiphyidx; /* == byifidx */
 	}
-	if (bywiphy)
-		return bywiphy;
+	if (bywiphyidx)
+		return bywiphyidx;
 
 	if (byifidx)
 		return byifidx;
@@ -98,7 +135,7 @@ cfg80211_get_dev_from_info(struct genl_info *info)
 {
 	struct cfg80211_registered_device *drv;
 
-	mutex_lock(&cfg80211_drv_mutex);
+	mutex_lock(&cfg80211_mutex);
 	drv = __cfg80211_drv_from_info(info);
 
 	/* if it is not an error we grab the lock on
@@ -107,7 +144,7 @@ cfg80211_get_dev_from_info(struct genl_info *info)
 	if (!IS_ERR(drv))
 		mutex_lock(&drv->mtx);
 
-	mutex_unlock(&cfg80211_drv_mutex);
+	mutex_unlock(&cfg80211_mutex);
 
 	return drv;
 }
@@ -118,7 +155,7 @@ cfg80211_get_dev_from_ifindex(int ifindex)
 	struct cfg80211_registered_device *drv = ERR_PTR(-ENODEV);
 	struct net_device *dev;
 
-	mutex_lock(&cfg80211_drv_mutex);
+	mutex_lock(&cfg80211_mutex);
 	dev = dev_get_by_index(&init_net, ifindex);
 	if (!dev)
 		goto out;
@@ -129,7 +166,7 @@ cfg80211_get_dev_from_ifindex(int ifindex)
 		drv = ERR_PTR(-ENODEV);
 	dev_put(dev);
  out:
-	mutex_unlock(&cfg80211_drv_mutex);
+	mutex_unlock(&cfg80211_mutex);
 	return drv;
 }
 
@@ -139,49 +176,43 @@ void cfg80211_put_dev(struct cfg80211_registered_device *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 idx, taken = -1, result, digits;
+	int wiphy_idx, taken = -1, result, digits;
 
-	mutex_lock(&cfg80211_drv_mutex);
+	assert_cfg80211_lock();
 
 	/* prohibit calling the thing phy%d when %d is not its number */
-	sscanf(newname, PHY_NAME "%d%n", &idx, &taken);
-	if (taken == strlen(newname) && idx != rdev->idx) {
-		/* count number of places needed to print idx */
+	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 (idx /= 10)
+		while (wiphy_idx /= 10)
 			digits++;
 		/*
 		 * deny the name if it is phy<idx> where <idx> is printed
 		 * without leading zeroes. taken == strlen(newname) here
 		 */
-		result = -EINVAL;
 		if (taken == strlen(PHY_NAME) + digits)
-			goto out_unlock;
+			return -EINVAL;
 	}
 
 
 	/* Ignore nop renames */
-	result = 0;
 	if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
-		goto out_unlock;
+		return 0;
 
 	/* Ensure another device does not already have this name. */
-	list_for_each_entry(drv, &cfg80211_drv_list, list) {
-		result = -EINVAL;
+	list_for_each_entry(drv, &cfg80211_drv_list, list)
 		if (strcmp(newname, dev_name(&drv->wiphy.dev)) == 0)
-			goto out_unlock;
-	}
+			return -EINVAL;
 
-	/* this will only check for collisions in sysfs
-	 * which is not even always compiled in.
-	 */
 	result = device_rename(&rdev->wiphy.dev, newname);
 	if (result)
-		goto out_unlock;
+		return result;
 
 	if (rdev->wiphy.debugfsdir &&
 	    !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
@@ -191,13 +222,9 @@ int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 		printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
 		       newname);
 
-	result = 0;
-out_unlock:
-	mutex_unlock(&cfg80211_drv_mutex);
-	if (result == 0)
-		nl80211_notify_dev_rename(rdev);
+	nl80211_notify_dev_rename(rdev);
 
-	return result;
+	return 0;
 }
 
 /* exported functions */
@@ -220,26 +247,28 @@ struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv)
 
 	drv->ops = ops;
 
-	mutex_lock(&cfg80211_drv_mutex);
+	mutex_lock(&cfg80211_mutex);
 
-	drv->idx = wiphy_counter++;
+	drv->wiphy_idx = wiphy_counter++;
 
-	if (unlikely(drv->idx < 0)) {
+	if (unlikely(!wiphy_idx_valid(drv->wiphy_idx))) {
 		wiphy_counter--;
-		mutex_unlock(&cfg80211_drv_mutex);
+		mutex_unlock(&cfg80211_mutex);
 		/* ugh, wrapped! */
 		kfree(drv);
 		return NULL;
 	}
 
-	mutex_unlock(&cfg80211_drv_mutex);
+	mutex_unlock(&cfg80211_mutex);
 
 	/* give it a proper name */
-	dev_set_name(&drv->wiphy.dev, 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;
@@ -259,6 +288,9 @@ int wiphy_register(struct wiphy *wiphy)
 	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;
@@ -273,10 +305,16 @@ int wiphy_register(struct wiphy *wiphy)
 
 		sband->band = band;
 
-		if (!sband->n_channels || !sband->n_bitrates) {
-			WARN_ON(1);
+		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 =
@@ -299,10 +337,10 @@ int wiphy_register(struct wiphy *wiphy)
 	/* check and set up bitrates */
 	ieee80211_set_bitrate_flags(wiphy);
 
-	mutex_lock(&cfg80211_drv_mutex);
+	mutex_lock(&cfg80211_mutex);
 
 	/* set up regulatory info */
-	wiphy_update_regulatory(wiphy, REGDOM_SET_BY_CORE);
+	wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
 
 	res = device_add(&drv->wiphy.dev);
 	if (res)
@@ -317,9 +355,20 @@ int wiphy_register(struct wiphy *wiphy)
 	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);
@@ -329,7 +378,7 @@ void wiphy_unregister(struct wiphy *wiphy)
 	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));
 
@@ -355,14 +404,17 @@ void wiphy_unregister(struct wiphy *wiphy)
 	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);
 }
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-10-19 15:55:44 +0000