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-rw-r--r--kernel/trace/trace_probe.h77
1 files changed, 61 insertions, 16 deletions
diff --git a/kernel/trace/trace_probe.h b/kernel/trace/trace_probe.h
index f9a8c632188b..d1714820efe1 100644
--- a/kernel/trace/trace_probe.h
+++ b/kernel/trace/trace_probe.h
@@ -55,7 +55,6 @@
/* Flags for trace_probe */
#define TP_FLAG_TRACE 1
#define TP_FLAG_PROFILE 2
-#define TP_FLAG_REGISTERED 4
/* data_loc: data location, compatible with u32 */
#define make_data_loc(len, offs) \
@@ -92,10 +91,13 @@ enum fetch_op {
FETCH_OP_FOFFS, /* File offset: .immediate */
// Stage 2 (dereference) op
FETCH_OP_DEREF, /* Dereference: .offset */
+ FETCH_OP_UDEREF, /* User-space Dereference: .offset */
// Stage 3 (store) ops
FETCH_OP_ST_RAW, /* Raw: .size */
FETCH_OP_ST_MEM, /* Mem: .offset, .size */
+ FETCH_OP_ST_UMEM, /* Mem: .offset, .size */
FETCH_OP_ST_STRING, /* String: .offset, .size */
+ FETCH_OP_ST_USTRING, /* User String: .offset, .size */
// Stage 4 (modify) op
FETCH_OP_MOD_BF, /* Bitfield: .basesize, .lshift, .rshift */
// Stage 5 (loop) op
@@ -235,16 +237,71 @@ struct event_file_link {
struct list_head list;
};
+static inline bool trace_probe_test_flag(struct trace_probe *tp,
+ unsigned int flag)
+{
+ return !!(tp->flags & flag);
+}
+
+static inline void trace_probe_set_flag(struct trace_probe *tp,
+ unsigned int flag)
+{
+ tp->flags |= flag;
+}
+
+static inline void trace_probe_clear_flag(struct trace_probe *tp,
+ unsigned int flag)
+{
+ tp->flags &= ~flag;
+}
+
static inline bool trace_probe_is_enabled(struct trace_probe *tp)
{
- return !!(tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE));
+ return trace_probe_test_flag(tp, TP_FLAG_TRACE | TP_FLAG_PROFILE);
}
-static inline bool trace_probe_is_registered(struct trace_probe *tp)
+static inline const char *trace_probe_name(struct trace_probe *tp)
{
- return !!(tp->flags & TP_FLAG_REGISTERED);
+ return trace_event_name(&tp->call);
}
+static inline const char *trace_probe_group_name(struct trace_probe *tp)
+{
+ return tp->call.class->system;
+}
+
+static inline struct trace_event_call *
+ trace_probe_event_call(struct trace_probe *tp)
+{
+ return &tp->call;
+}
+
+static inline int trace_probe_unregister_event_call(struct trace_probe *tp)
+{
+ /* tp->event is unregistered in trace_remove_event_call() */
+ return trace_remove_event_call(&tp->call);
+}
+
+static inline bool trace_probe_has_single_file(struct trace_probe *tp)
+{
+ return !!list_is_singular(&tp->files);
+}
+
+int trace_probe_init(struct trace_probe *tp, const char *event,
+ const char *group);
+void trace_probe_cleanup(struct trace_probe *tp);
+int trace_probe_register_event_call(struct trace_probe *tp);
+int trace_probe_add_file(struct trace_probe *tp, struct trace_event_file *file);
+int trace_probe_remove_file(struct trace_probe *tp,
+ struct trace_event_file *file);
+struct event_file_link *trace_probe_get_file_link(struct trace_probe *tp,
+ struct trace_event_file *file);
+
+#define trace_probe_for_each_link(pos, tp) \
+ list_for_each_entry(pos, &(tp)->files, list)
+#define trace_probe_for_each_link_rcu(pos, tp) \
+ list_for_each_entry_rcu(pos, &(tp)->files, list)
+
/* Check the name is good for event/group/fields */
static inline bool is_good_name(const char *name)
{
@@ -257,18 +314,6 @@ static inline bool is_good_name(const char *name)
return true;
}
-static inline struct event_file_link *
-find_event_file_link(struct trace_probe *tp, struct trace_event_file *file)
-{
- struct event_file_link *link;
-
- list_for_each_entry(link, &tp->files, list)
- if (link->file == file)
- return link;
-
- return NULL;
-}
-
#define TPARG_FL_RETURN BIT(0)
#define TPARG_FL_KERNEL BIT(1)
#define TPARG_FL_FENTRY BIT(2)