tracing: Add trace options for tracer options to instances

Add the tracer options to instances options directory as well. Only add the
options for tracers that are allowed to be enabled by an instance. But note,
that tracer options are global. That is, tracer options enabled in an
instance, also take affect at the top level and in other instances.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 423cb48..fb8a61c 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -159,6 +159,7 @@
 };
 
 struct tracer;
+struct trace_option_dentry;
 
 struct trace_buffer {
 	struct trace_array		*tr;
@@ -170,6 +171,11 @@
 
 #define TRACE_FLAGS_MAX_SIZE		32
 
+struct trace_options {
+	struct tracer			*tracer;
+	struct trace_option_dentry	*topts;
+};
+
 /*
  * The trace array - an array of per-CPU trace arrays. This is the
  * highest level data structure that individual tracers deal with.
@@ -218,6 +224,7 @@
 #endif
 	int			stop_count;
 	int			clock_id;
+	int			nr_topts;
 	struct tracer		*current_trace;
 	unsigned int		trace_flags;
 	unsigned char		trace_flags_index[TRACE_FLAGS_MAX_SIZE];
@@ -227,6 +234,7 @@
 	struct dentry		*options;
 	struct dentry		*percpu_dir;
 	struct dentry		*event_dir;
+	struct trace_options	*topts;
 	struct list_head	systems;
 	struct list_head	events;
 	cpumask_var_t		tracing_cpumask; /* only trace on set CPUs */
@@ -398,7 +406,6 @@
 						u32 mask, int set);
 	struct tracer		*next;
 	struct tracer_flags	*flags;
-	struct trace_option_dentry *topts;
 	int			enabled;
 	int			ref;
 	bool			print_max;