---

yaml
---
r: 90593
b: refs/heads/master
c: 3b96766
h: refs/heads/master
i:
  90591: 6f7f08a
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7d1559f1737d5ca27b267b0392015f42b3bbe2fa
+refs/heads/master: 3b96766f0e643f52ae19e134664df6730c737e87

trunk/net/mac80211/cfg.c

@@ -135,6 +135,7 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 	struct sta_info *sta = NULL;
 	enum ieee80211_key_alg alg;
 	struct ieee80211_key *key;
+	int err;
 
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
@@ -157,17 +158,24 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 	if (!key)
 		return -ENOMEM;
 
+	rcu_read_lock();
+
 	if (mac_addr) {
 		sta = sta_info_get(sdata->local, mac_addr);
 		if (!sta) {
 			ieee80211_key_free(key);
-			return -ENOENT;
+			err = -ENOENT;
+			goto out_unlock;
 		}
 	}
 
 	ieee80211_key_link(key, sdata, sta);
 
-	return 0;
+	err = 0;
+ out_unlock:
+	rcu_read_unlock();
+
+	return err;
 }
 
 static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
@@ -179,28 +187,37 @@ static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
 
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
+	rcu_read_lock();
+
 	if (mac_addr) {
+		ret = -ENOENT;
+
 		sta = sta_info_get(sdata->local, mac_addr);
 		if (!sta)
-			return -ENOENT;
+			goto out_unlock;
 
-		ret = 0;
 		if (sta->key) {
 			ieee80211_key_free(sta->key);
 			WARN_ON(sta->key);
-		} else
-			ret = -ENOENT;
+			ret = 0;
+		}
 
-		return ret;
+		goto out_unlock;
 	}
 
-	if (!sdata->keys[key_idx])
-		return -ENOENT;
+	if (!sdata->keys[key_idx]) {
+		ret = -ENOENT;
+		goto out_unlock;
+	}
 
 	ieee80211_key_free(sdata->keys[key_idx]);
 	WARN_ON(sdata->keys[key_idx]);
 
-	return 0;
+	ret = 0;
+ out_unlock:
+	rcu_read_unlock();
+
+	return ret;
 }
 
 static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
@@ -217,6 +234,8 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 	u16 iv16;
 	int err = -ENOENT;
 
+	rcu_read_lock();
+
 	if (mac_addr) {
 		sta = sta_info_get(sdata->local, mac_addr);
 		if (!sta)
@@ -280,6 +299,7 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
 	err = 0;
 
  out:
+	rcu_read_unlock();
 	return err;
 }
 
@@ -289,9 +309,13 @@ static int ieee80211_config_default_key(struct wiphy *wiphy,
 {
 	struct ieee80211_sub_if_data *sdata;
 
+	rcu_read_lock();
+
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	ieee80211_set_default_key(sdata, key_idx);
 
+	rcu_read_unlock();
+
 	return 0;
 }
 

trunk/net/mac80211/debugfs_key.c

@@ -184,23 +184,35 @@ KEY_OPS(key);
 	key->debugfs.name = debugfs_create_file(#name, 0400,\
 				key->debugfs.dir, key, &key_##name##_ops);
 
-void ieee80211_debugfs_key_add(struct ieee80211_local *local,
-			       struct ieee80211_key *key)
-{
+void ieee80211_debugfs_key_add(struct ieee80211_key *key)
+  {
 	static int keycount;
-	char buf[20];
+	char buf[50];
+	DECLARE_MAC_BUF(mac);
+	struct sta_info *sta;
 
-	if (!local->debugfs.keys)
+	if (!key->local->debugfs.keys)
 		return;
 
 	sprintf(buf, "%d", keycount);
 	keycount++;
 	key->debugfs.dir = debugfs_create_dir(buf,
-					local->debugfs.keys);
+					key->local->debugfs.keys);
 
 	if (!key->debugfs.dir)
 		return;
 
+	rcu_read_lock();
+	sta = rcu_dereference(key->sta);
+	if (sta)
+		sprintf(buf, "../../stations/%s", print_mac(mac, sta->addr));
+	rcu_read_unlock();
+
+	/* using sta as a boolean is fine outside RCU lock */
+	if (sta)
+		key->debugfs.stalink =
+			debugfs_create_symlink("station", key->debugfs.dir, buf);
+
 	DEBUGFS_ADD(keylen);
 	DEBUGFS_ADD(flags);
 	DEBUGFS_ADD(keyidx);
@@ -258,19 +270,6 @@ void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
 	debugfs_remove(sdata->debugfs.default_key);
 	sdata->debugfs.default_key = NULL;
 }
-void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key,
-				    struct sta_info *sta)
-{
-	char buf[50];
-	DECLARE_MAC_BUF(mac);
-
-	if (!key->debugfs.dir)
-		return;
-
-	sprintf(buf, "../../stations/%s", print_mac(mac, sta->addr));
-	key->debugfs.stalink =
-		debugfs_create_symlink("station", key->debugfs.dir, buf);
-}
 
 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
 				   struct sta_info *sta)

trunk/net/mac80211/debugfs_key.h

@@ -2,18 +2,14 @@
 #define __MAC80211_DEBUGFS_KEY_H
 
 #ifdef CONFIG_MAC80211_DEBUGFS
-void ieee80211_debugfs_key_add(struct ieee80211_local *local,
-			       struct ieee80211_key *key);
+void ieee80211_debugfs_key_add(struct ieee80211_key *key);
 void ieee80211_debugfs_key_remove(struct ieee80211_key *key);
 void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata);
 void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata);
-void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key,
-				    struct sta_info *sta);
 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
 				   struct sta_info *sta);
 #else
-static inline void ieee80211_debugfs_key_add(struct ieee80211_local *local,
-					     struct ieee80211_key *key)
+static inline void ieee80211_debugfs_key_add(struct ieee80211_key *key)
 {}
 static inline void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
 {}
@@ -23,9 +19,6 @@ static inline void ieee80211_debugfs_key_add_default(
 static inline void ieee80211_debugfs_key_remove_default(
 	struct ieee80211_sub_if_data *sdata)
 {}
-static inline void ieee80211_debugfs_key_sta_link(
-	struct ieee80211_key *key, struct sta_info *sta)
-{}
 static inline void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
 						 struct sta_info *sta)
 {}

trunk/net/mac80211/ieee80211.c

@@ -1868,6 +1868,12 @@ static void __exit ieee80211_exit(void)
 {
 	rc80211_pid_exit();
 
+	/*
+	 * For key todo, it'll be empty by now but the work
+	 * might still be scheduled.
+	 */
+	flush_scheduled_work();
+
 	if (mesh_allocated)
 		ieee80211s_stop();
 

trunk/net/mac80211/ieee80211_i.h

@@ -600,8 +600,8 @@ struct ieee80211_local {
 	/*
 	 * The lock only protects the list, hash, timer and counter
 	 * against manipulation, reads are done in RCU. Additionally,
-	 * the lock protects each BSS's TIM bitmap and a few items
-	 * in a STA info structure.
+	 * the lock protects each BSS's TIM bitmap, a few items in
+	 * STA info structures and various key pointers.
 	 */
 	spinlock_t sta_lock;
 	unsigned long num_sta;

trunk/net/mac80211/ieee80211_ioctl.c

@@ -36,6 +36,7 @@ static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr,
 	struct sta_info *sta;
 	struct ieee80211_key *key;
 	struct ieee80211_sub_if_data *sdata;
+	int err;
 
 	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
@@ -46,23 +47,31 @@ static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr,
 	}
 
 	if (remove) {
+		rcu_read_lock();
+
+		err = 0;
+
 		if (is_broadcast_ether_addr(sta_addr)) {
 			key = sdata->keys[idx];
 		} else {
 			sta = sta_info_get(local, sta_addr);
-			if (!sta)
-				return -ENOENT;
+			if (!sta) {
+				err = -ENOENT;
+				goto out_unlock;
+			}
 			key = sta->key;
 		}
 
 		ieee80211_key_free(key);
-		return 0;
 	} else {
 		key = ieee80211_key_alloc(alg, idx, key_len, _key);
 		if (!key)
 			return -ENOMEM;
 
 		sta = NULL;
+		err = 0;
+
+		rcu_read_lock();
 
 		if (!is_broadcast_ether_addr(sta_addr)) {
 			set_tx_key = 0;
@@ -74,13 +83,15 @@ static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr,
 			 */
 			if (idx != 0 && alg != ALG_WEP) {
 				ieee80211_key_free(key);
-				return -EINVAL;
+				err = -EINVAL;
+				goto out_unlock;
 			}
 
 			sta = sta_info_get(local, sta_addr);
 			if (!sta) {
 				ieee80211_key_free(key);
-				return -ENOENT;
+				err = -ENOENT;
+				goto out_unlock;
 			}
 		}
 
@@ -90,7 +101,10 @@ static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr,
 			ieee80211_set_default_key(sdata, idx);
 	}
 
-	return 0;
+ out_unlock:
+	rcu_read_unlock();
+
+	return err;
 }
 
 static int ieee80211_ioctl_siwgenie(struct net_device *dev,

trunk/net/mac80211/ieee80211_key.h

@@ -51,22 +51,32 @@ struct sta_info;
  *
  * @KEY_FLAG_UPLOADED_TO_HARDWARE: Indicates that this key is present
  *	in the hardware for TX crypto hardware acceleration.
- * @KEY_FLAG_REMOVE_FROM_HARDWARE: Indicates to the key code that this
- *	key is present in the hardware (but it cannot be used for
- *	hardware acceleration any more!)
+ * @KEY_FLAG_TODO_DELETE: Key is marked for deletion and will, after an
+ *	RCU grace period, no longer be reachable other than from the
+ *	todo list.
+ * @KEY_FLAG_TODO_HWACCEL: Key needs to be added to hardware acceleration.
+ * @KEY_FLAG_TODO_DEFKEY: Key is default key and debugfs needs to be updated.
+ * @KEY_FLAG_TODO_ADD_DEBUGFS: Key needs to be added to debugfs.
  */
 enum ieee80211_internal_key_flags {
 	KEY_FLAG_UPLOADED_TO_HARDWARE	= BIT(0),
-	KEY_FLAG_REMOVE_FROM_HARDWARE	= BIT(1),
+	KEY_FLAG_TODO_DELETE		= BIT(1),
+	KEY_FLAG_TODO_HWACCEL		= BIT(2),
+	KEY_FLAG_TODO_DEFKEY		= BIT(3),
+	KEY_FLAG_TODO_ADD_DEBUGFS	= BIT(4),
 };
 
 struct ieee80211_key {
 	struct ieee80211_local *local;
 	struct ieee80211_sub_if_data *sdata;
 	struct sta_info *sta;
 
+	/* for sdata list */
 	struct list_head list;
+	/* for todo list */
+	struct list_head todo;
 
+	/* protected by todo lock! */
 	unsigned int flags;
 
 	union {
@@ -142,4 +152,6 @@ void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
 void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
 void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
 
+void ieee80211_key_todo(void);
+
 #endif /* IEEE80211_KEY_H */

trunk/net/mac80211/ieee80211_sta.c

@@ -952,11 +952,8 @@ static void ieee80211_associated(struct net_device *dev,
 
 	rcu_read_unlock();
 
-	if (disassoc && sta) {
-		rtnl_lock();
+	if (disassoc && sta)
 		sta_info_destroy(sta);
-		rtnl_unlock();
-	}
 
 	if (disassoc) {
 		ifsta->state = IEEE80211_DISABLED;
@@ -3104,12 +3101,8 @@ static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
 		}
 	spin_unlock_irqrestore(&local->sta_lock, flags);
 
-	synchronize_rcu();
-
-	rtnl_lock();
 	list_for_each_entry_safe(sta, tmp, &tmp_list, list)
 		sta_info_destroy(sta);
-	rtnl_unlock();
 }