Add units to debugfs abi header

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

diff --git a/ltt-debugfs-abi.h b/ltt-debugfs-abi.h
index ef2554b81bce95f546e799ac1ad4021a5d118bca..85e689c88705928579383d4ad9ff1fd4b5f91ac3 100644 (file)
--- a/ltt-debugfs-abi.h
+++ b/ltt-debugfs-abi.h
@@ -11,9 +11,12 @@
 
 #include <linux/fs.h>
 
+#define LTTNG_SYM_NAME_LEN     128
+
 enum lttng_kernel_instrumentation {
        LTTNG_KERNEL_TRACEPOINTS,
        LTTNG_KERNEL_KPROBES,
+       LTTNG_KERNEL_FUNCTION_TRACER,
 };
 
 /*
@@ -21,16 +24,11 @@ enum lttng_kernel_instrumentation {
  */
 
 struct lttng_kernel_channel {
-       int overwrite;                  /* 1: overwrite, 0: discard */
-       uint64_t subbuf_size;
+       int overwrite;                          /* 1: overwrite, 0: discard */
+       uint64_t subbuf_size;                   /* in bytes */
        uint64_t num_subbuf;
-       unsigned int switch_timer_interval;
-       unsigned int read_timer_interval;
-};
-
-struct lttng_kernel_event {
-       enum lttng_kernel_instrumentation instrumentation;
-       char name[];
+       unsigned int switch_timer_interval;     /* usecs */
+       unsigned int read_timer_interval;       /* usecs */
 };
 
 /*
@@ -40,7 +38,21 @@ struct lttng_kernel_kprobe {
        uint64_t addr;
 
        uint64_t offset;
-       char symbol_name[];
+       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 {