[MAC80211]: Add debugfs attributes.

[safe/jmp/linux-2.6] / net / mac80211 / sta_info.c

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index cddaf57..ab7b1f0 100644 (file)
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -19,6 +19,8 @@
 #include "ieee80211_i.h"
 #include "ieee80211_rate.h"
 #include "sta_info.h"
+#include "debugfs_key.h"
+#include "debugfs_sta.h"
 
 /* Caller must hold local->sta_lock */
 static void sta_info_hash_add(struct ieee80211_local *local,
@@ -120,6 +122,8 @@ static void sta_info_release(struct kref *kref)
        }
        rate_control_free_sta(sta->rate_ctrl, sta->rate_ctrl_priv);
        rate_control_put(sta->rate_ctrl);
+       if (sta->key)
+               ieee80211_debugfs_key_sta_del(sta->key, sta);
        kfree(sta);
 }
 
@@ -173,9 +177,42 @@ struct sta_info * sta_info_add(struct ieee80211_local *local,
               local->mdev->name, MAC_ARG(addr));
 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 
+#ifdef CONFIG_MAC80211_DEBUGFS
+       if (!in_interrupt()) {
+               sta->debugfs_registered = 1;
+               ieee80211_sta_debugfs_add(sta);
+               rate_control_add_sta_debugfs(sta);
+       } else {
+               /* debugfs entry adding might sleep, so schedule process
+                * context task for adding entry for STAs that do not yet
+                * have one. */
+               queue_work(local->hw.workqueue, &local->sta_debugfs_add);
+       }
+#endif
+
        return sta;
 }
 
+static void finish_sta_info_free(struct ieee80211_local *local,
+                                struct sta_info *sta)
+{
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+       printk(KERN_DEBUG "%s: Removed STA " MAC_FMT "\n",
+              local->mdev->name, MAC_ARG(sta->addr));
+#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
+
+       if (sta->key) {
+               ieee80211_debugfs_key_remove(sta->key);
+               ieee80211_key_free(sta->key);
+               sta->key = NULL;
+       }
+
+       rate_control_remove_sta_debugfs(sta);
+       ieee80211_sta_debugfs_remove(sta);
+
+       sta_info_put(sta);
+}
+
 static void sta_info_remove(struct sta_info *sta)
 {
        struct ieee80211_local *local = sta->local;
@@ -239,17 +276,13 @@ void sta_info_free(struct sta_info *sta, int locked)
                sta->key_idx_compression = HW_KEY_IDX_INVALID;
        }
 
-#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
-       printk(KERN_DEBUG "%s: Removed STA " MAC_FMT "\n",
-              local->mdev->name, MAC_ARG(sta->addr));
-#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
-
-       if (sta->key) {
-               ieee80211_key_free(sta->key);
-               sta->key = NULL;
-       }
-
-       sta_info_put(sta);
+#ifdef CONFIG_MAC80211_DEBUGFS
+       if (in_atomic()) {
+               list_add(&sta->list, &local->deleted_sta_list);
+               queue_work(local->hw.workqueue, &local->sta_debugfs_add);
+       } else
+#endif
+               finish_sta_info_free(local, sta);
 }
 
 
@@ -322,6 +355,50 @@ static void sta_info_cleanup(unsigned long data)
        add_timer(&local->sta_cleanup);
 }
 
+#ifdef CONFIG_MAC80211_DEBUGFS
+static void sta_info_debugfs_add_task(struct work_struct *work)
+{
+       struct ieee80211_local *local =
+               container_of(work, struct ieee80211_local, sta_debugfs_add);
+       struct sta_info *sta, *tmp;
+
+       while (1) {
+               spin_lock_bh(&local->sta_lock);
+               if (!list_empty(&local->deleted_sta_list)) {
+                       sta = list_entry(local->deleted_sta_list.next,
+                                        struct sta_info, list);
+                       list_del(local->deleted_sta_list.next);
+               } else
+                       sta = NULL;
+               spin_unlock_bh(&local->sta_lock);
+               if (!sta)
+                       break;
+               finish_sta_info_free(local, sta);
+       }
+
+       while (1) {
+               sta = NULL;
+               spin_lock_bh(&local->sta_lock);
+               list_for_each_entry(tmp, &local->sta_list, list) {
+                       if (!tmp->debugfs_registered) {
+                               sta = tmp;
+                               __sta_info_get(sta);
+                               break;
+                       }
+               }
+               spin_unlock_bh(&local->sta_lock);
+
+               if (!sta)
+                       break;
+
+               sta->debugfs_registered = 1;
+               ieee80211_sta_debugfs_add(sta);
+               rate_control_add_sta_debugfs(sta);
+               sta_info_put(sta);
+       }
+}
+#endif
+
 void sta_info_init(struct ieee80211_local *local)
 {
        spin_lock_init(&local->sta_lock);
@@ -332,6 +409,10 @@ void sta_info_init(struct ieee80211_local *local)
        local->sta_cleanup.expires = jiffies + STA_INFO_CLEANUP_INTERVAL;
        local->sta_cleanup.data = (unsigned long) local;
        local->sta_cleanup.function = sta_info_cleanup;
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+       INIT_WORK(&local->sta_debugfs_add, sta_info_debugfs_add_task);
+#endif
 }
 
 int sta_info_start(struct ieee80211_local *local)
@@ -347,7 +428,10 @@ void sta_info_stop(struct ieee80211_local *local)
        del_timer(&local->sta_cleanup);
 
        list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
-               /*  We don't need locking at this point. */
+               /* sta_info_free must be called with 0 as the last
+                * parameter to ensure all debugfs sta entries are
+                * unregistered. We don't need locking at this
+                * point. */
                sta_info_free(sta, 0);
        }
 }