Function tracer support

[lttng-modules.git] / ltt-debugfs-abi.h

diff --git a/ltt-debugfs-abi.h b/ltt-debugfs-abi.h
index 3a2af561294582caf1c00872744b11ebddd37551..74ad764da2bdf9ab4d5685c0f8fccb8bedb710ea 100644 (file)
--- a/ltt-debugfs-abi.h
+++ b/ltt-debugfs-abi.h
@@ -11,33 +11,69 @@
 
 #include <linux/fs.h>
 
-enum instrum_type {
-       INSTRUM_TRACEPOINTS,
+#define LTTNG_SYM_NAME_LEN     128
+
+enum lttng_kernel_instrumentation {
+       LTTNG_KERNEL_TRACEPOINTS,
+       LTTNG_KERNEL_KPROBES,
+       LTTNG_KERNEL_FUNCTION_TRACER,
 };
 
 /*
  * LTTng DebugFS ABI structures.
  */
 
-struct lttng_channel {
+struct lttng_kernel_channel {
        int overwrite;                  /* 1: overwrite, 0: discard */
-       u64 subbuf_size;
-       u64 num_subbuf;
+       uint64_t subbuf_size;
+       uint64_t num_subbuf;
        unsigned int switch_timer_interval;
        unsigned int read_timer_interval;
 };
 
-struct lttng_event {
-       enum instrum_type itype;
-       char name[];
+/*
+ * Either addr is used, or symbol_name and offset.
+ */
+struct lttng_kernel_kprobe {
+       uint64_t addr;
+
+       uint64_t offset;
+       char symbol_name[LTTNG_SYM_NAME_LEN];
+};
+
+struct lttng_kernel_function_tracer {
+       char symbol_name[LTTNG_SYM_NAME_LEN];
+};
+
+struct lttng_kernel_event {
+       enum lttng_kernel_instrumentation instrumentation;
+       /* Per instrumentation type configuration */
+       union {
+               struct lttng_kernel_kprobe kprobe;
+               struct lttng_kernel_function_tracer ftrace;
+       } u;
+       char name[];    /* event name */
+};
+
+struct lttng_kernel_tracer_version {
+       uint32_t version;
+       uint32_t patchlevel;
+       uint32_t sublevel;
 };
 
-#define LTTNG_SESSION          _IO(0xF6, 0x40)
-#define LTTNG_SESSION_START    _IO(0xF6, 0x41)
-#define LTTNG_SESSION_STOP     _IO(0xF6, 0x42)
-#define LTTNG_CHANNEL          _IOW(0xF6, 0x43, struct lttng_channel)
-#define LTTNG_STREAM           _IO(0xF6, 0x44)
-#define LTTNG_EVENT            _IOW(0xF6, 0x45, struct lttng_event)
-#define LTTNG_METADATA         _IOW(0xF6, 0x46, struct lttng_channel)
+#define LTTNG_KERNEL_SESSION           _IO(0xF6, 0x40)
+#define LTTNG_KERNEL_SESSION_START     _IO(0xF6, 0x41)
+#define LTTNG_KERNEL_SESSION_STOP      _IO(0xF6, 0x42)
+#define LTTNG_KERNEL_CHANNEL           \
+       _IOW(0xF6, 0x43, struct lttng_kernel_channel)
+#define LTTNG_KERNEL_STREAM            _IO(0xF6, 0x44)
+#define LTTNG_KERNEL_EVENT             \
+       _IOW(0xF6, 0x45, struct lttng_kernel_event)
+#define LTTNG_KERNEL_METADATA          \
+       _IOW(0xF6, 0x46, struct lttng_kernel_channel)
+#define LTTNG_KERNEL_KPROBE            \
+       _IOW(0xF6, 0x47, struct lttng_kernel_kprobe)
+#define LTTNG_KERNEL_TRACER_VERSION    \
+       _IOR(0xF6, 0x48, struct lttng_kernel_tracer_version)
 
 #endif /* _LTT_DEBUGFS_ABI_H */