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-rw-r--r--kernel/trace/trace.h83
1 files changed, 48 insertions, 35 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 1ea51ab53edf..ae1cce91fead 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -753,6 +753,21 @@ enum print_line_t print_trace_line(struct trace_iterator *iter);
extern char trace_find_mark(unsigned long long duration);
+struct ftrace_hash {
+ unsigned long size_bits;
+ struct hlist_head *buckets;
+ unsigned long count;
+ struct rcu_head rcu;
+};
+
+struct ftrace_func_entry *
+ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
+
+static __always_inline bool ftrace_hash_empty(struct ftrace_hash *hash)
+{
+ return !hash || !hash->count;
+}
+
/* Standard output formatting function used for function return traces */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
@@ -787,53 +802,50 @@ extern void __trace_graph_return(struct trace_array *tr,
struct ftrace_graph_ret *trace,
unsigned long flags, int pc);
-
#ifdef CONFIG_DYNAMIC_FTRACE
-/* TODO: make this variable */
-#define FTRACE_GRAPH_MAX_FUNCS 32
-extern int ftrace_graph_count;
-extern unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS];
-extern int ftrace_graph_notrace_count;
-extern unsigned long ftrace_graph_notrace_funcs[FTRACE_GRAPH_MAX_FUNCS];
+extern struct ftrace_hash *ftrace_graph_hash;
+extern struct ftrace_hash *ftrace_graph_notrace_hash;
static inline int ftrace_graph_addr(unsigned long addr)
{
- int i;
-
- if (!ftrace_graph_count)
- return 1;
-
- for (i = 0; i < ftrace_graph_count; i++) {
- if (addr == ftrace_graph_funcs[i]) {
- /*
- * If no irqs are to be traced, but a set_graph_function
- * is set, and called by an interrupt handler, we still
- * want to trace it.
- */
- if (in_irq())
- trace_recursion_set(TRACE_IRQ_BIT);
- else
- trace_recursion_clear(TRACE_IRQ_BIT);
- return 1;
- }
+ int ret = 0;
+
+ preempt_disable_notrace();
+
+ if (ftrace_hash_empty(ftrace_graph_hash)) {
+ ret = 1;
+ goto out;
}
- return 0;
+ if (ftrace_lookup_ip(ftrace_graph_hash, addr)) {
+ /*
+ * If no irqs are to be traced, but a set_graph_function
+ * is set, and called by an interrupt handler, we still
+ * want to trace it.
+ */
+ if (in_irq())
+ trace_recursion_set(TRACE_IRQ_BIT);
+ else
+ trace_recursion_clear(TRACE_IRQ_BIT);
+ ret = 1;
+ }
+
+out:
+ preempt_enable_notrace();
+ return ret;
}
static inline int ftrace_graph_notrace_addr(unsigned long addr)
{
- int i;
+ int ret = 0;
- if (!ftrace_graph_notrace_count)
- return 0;
+ preempt_disable_notrace();
- for (i = 0; i < ftrace_graph_notrace_count; i++) {
- if (addr == ftrace_graph_notrace_funcs[i])
- return 1;
- }
+ if (ftrace_lookup_ip(ftrace_graph_notrace_hash, addr))
+ ret = 1;
- return 0;
+ preempt_enable_notrace();
+ return ret;
}
#else
static inline int ftrace_graph_addr(unsigned long addr)
@@ -1300,7 +1312,8 @@ static inline bool is_string_field(struct ftrace_event_field *field)
{
return field->filter_type == FILTER_DYN_STRING ||
field->filter_type == FILTER_STATIC_STRING ||
- field->filter_type == FILTER_PTR_STRING;
+ field->filter_type == FILTER_PTR_STRING ||
+ field->filter_type == FILTER_COMM;
}
static inline bool is_function_field(struct ftrace_event_field *field)