[Bluetooth] Allow security for outgoing L2CAP connections

[pandora-kernel.git] / kernel / timer.c

diff --git a/kernel/timer.c b/kernel/timer.c
index f3d35d4..ceacc66 100644 (file)
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -320,14 +320,130 @@ static void timer_stats_account_timer(struct timer_list *timer)
 static void timer_stats_account_timer(struct timer_list *timer) {}
 #endif
 
-/**
- * init_timer - initialize a timer.
- * @timer: the timer to be initialized
- *
- * init_timer() must be done to a timer prior calling *any* of the
- * other timer functions.
+#ifdef CONFIG_DEBUG_OBJECTS_TIMERS
+
+static struct debug_obj_descr timer_debug_descr;
+
+/*
+ * fixup_init is called when:
+ * - an active object is initialized
  */
-void init_timer(struct timer_list *timer)
+static int timer_fixup_init(void *addr, enum debug_obj_state state)
+{
+       struct timer_list *timer = addr;
+
+       switch (state) {
+       case ODEBUG_STATE_ACTIVE:
+               del_timer_sync(timer);
+               debug_object_init(timer, &timer_debug_descr);
+               return 1;
+       default:
+               return 0;
+       }
+}
+
+/*
+ * fixup_activate is called when:
+ * - an active object is activated
+ * - an unknown object is activated (might be a statically initialized object)
+ */
+static int timer_fixup_activate(void *addr, enum debug_obj_state state)
+{
+       struct timer_list *timer = addr;
+
+       switch (state) {
+
+       case ODEBUG_STATE_NOTAVAILABLE:
+               /*
+                * This is not really a fixup. The timer was
+                * statically initialized. We just make sure that it
+                * is tracked in the object tracker.
+                */
+               if (timer->entry.next == NULL &&
+                   timer->entry.prev == TIMER_ENTRY_STATIC) {
+                       debug_object_init(timer, &timer_debug_descr);
+                       debug_object_activate(timer, &timer_debug_descr);
+                       return 0;
+               } else {
+                       WARN_ON_ONCE(1);
+               }
+               return 0;
+
+       case ODEBUG_STATE_ACTIVE:
+               WARN_ON(1);
+
+       default:
+               return 0;
+       }
+}
+
+/*
+ * fixup_free is called when:
+ * - an active object is freed
+ */
+static int timer_fixup_free(void *addr, enum debug_obj_state state)
+{
+       struct timer_list *timer = addr;
+
+       switch (state) {
+       case ODEBUG_STATE_ACTIVE:
+               del_timer_sync(timer);
+               debug_object_free(timer, &timer_debug_descr);
+               return 1;
+       default:
+               return 0;
+       }
+}
+
+static struct debug_obj_descr timer_debug_descr = {
+       .name           = "timer_list",
+       .fixup_init     = timer_fixup_init,
+       .fixup_activate = timer_fixup_activate,
+       .fixup_free     = timer_fixup_free,
+};
+
+static inline void debug_timer_init(struct timer_list *timer)
+{
+       debug_object_init(timer, &timer_debug_descr);
+}
+
+static inline void debug_timer_activate(struct timer_list *timer)
+{
+       debug_object_activate(timer, &timer_debug_descr);
+}
+
+static inline void debug_timer_deactivate(struct timer_list *timer)
+{
+       debug_object_deactivate(timer, &timer_debug_descr);
+}
+
+static inline void debug_timer_free(struct timer_list *timer)
+{
+       debug_object_free(timer, &timer_debug_descr);
+}
+
+static void __init_timer(struct timer_list *timer);
+
+void init_timer_on_stack(struct timer_list *timer)
+{
+       debug_object_init_on_stack(timer, &timer_debug_descr);
+       __init_timer(timer);
+}
+EXPORT_SYMBOL_GPL(init_timer_on_stack);
+
+void destroy_timer_on_stack(struct timer_list *timer)
+{
+       debug_object_free(timer, &timer_debug_descr);
+}
+EXPORT_SYMBOL_GPL(destroy_timer_on_stack);
+
+#else
+static inline void debug_timer_init(struct timer_list *timer) { }
+static inline void debug_timer_activate(struct timer_list *timer) { }
+static inline void debug_timer_deactivate(struct timer_list *timer) { }
+#endif
+
+static void __init_timer(struct timer_list *timer)
 {
        timer->entry.next = NULL;
        timer->base = __raw_get_cpu_var(tvec_bases);
@@ -337,6 +453,19 @@ void init_timer(struct timer_list *timer)
        memset(timer->start_comm, 0, TASK_COMM_LEN);
 #endif
 }
+
+/**
+ * init_timer - initialize a timer.
+ * @timer: the timer to be initialized
+ *
+ * init_timer() must be done to a timer prior calling *any* of the
+ * other timer functions.
+ */
+void init_timer(struct timer_list *timer)
+{
+       debug_timer_init(timer);
+       __init_timer(timer);
+}
 EXPORT_SYMBOL(init_timer);
 
 void init_timer_deferrable(struct timer_list *timer)
@@ -351,6 +480,8 @@ static inline void detach_timer(struct timer_list *timer,
 {
        struct list_head *entry = &timer->entry;
 
+       debug_timer_deactivate(timer);
+
        __list_del(entry->prev, entry->next);
        if (clear_pending)
                entry->next = NULL;
@@ -405,6 +536,8 @@ int __mod_timer(struct timer_list *timer, unsigned long expires)
                ret = 1;
        }
 
+       debug_timer_activate(timer);
+
        new_base = __get_cpu_var(tvec_bases);
 
        if (base != new_base) {
@@ -450,6 +583,7 @@ void add_timer_on(struct timer_list *timer, int cpu)
        BUG_ON(timer_pending(timer) || !timer->function);
        spin_lock_irqsave(&base->lock, flags);
        timer_set_base(timer, base);
+       debug_timer_activate(timer);
        internal_add_timer(base, timer);
        /*
         * Check whether the other CPU is idle and needs to be
@@ -1086,11 +1220,14 @@ signed long __sched schedule_timeout(signed long timeout)
 
        expire = timeout + jiffies;
 
-       setup_timer(&timer, process_timeout, (unsigned long)current);
+       setup_timer_on_stack(&timer, process_timeout, (unsigned long)current);
        __mod_timer(&timer, expire);
        schedule();
        del_singleshot_timer_sync(&timer);
 
+       /* Remove the timer from the object tracker */
+       destroy_timer_on_stack(&timer);
+
        timeout = expire - jiffies;
 
  out: