Add read version ABI ioctl

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

diff --git a/ltt-debugfs-abi.c b/ltt-debugfs-abi.c
index 41b9f8fa55d7108a01290ec37bab95b3a4d14f7d..540164662e2b315fb4039bebb8f621d9f283708b 100644 (file)
--- a/ltt-debugfs-abi.c
+++ b/ltt-debugfs-abi.c
@@ -32,6 +32,7 @@
 #include "wrapper/ringbuffer/vfs.h"
 #include "ltt-debugfs-abi.h"
 #include "ltt-events.h"
+#include "ltt-tracer.h"
 
 /*
  * This is LTTng's own personal way to create a system call as an external
@@ -83,6 +84,21 @@ fd_error:
        return ret;
 }
 
+static
+long lttng_abi_tracer_version(struct file *file, 
+       struct lttng_kernel_tracer_version __user *uversion_param)
+{
+       struct lttng_kernel_tracer_version v;
+
+       v.version = LTTNG_VERSION;
+       v.patchlevel = LTTNG_PATCHLEVEL;
+       v.sublevel = LTTNG_SUBLEVEL;
+
+       if (copy_to_user(uversion_param, &v, sizeof(v)))
+               return -EFAULT;
+       return 0;
+}
+
 /**
  *     lttng_ioctl - lttng syscall through ioctl
  *
@@ -102,6 +118,9 @@ long lttng_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
        switch (cmd) {
        case LTTNG_KERNEL_SESSION:
                return lttng_abi_create_session();
+       case LTTNG_KERNEL_TRACER_VERSION:
+               return lttng_abi_tracer_version(file,
+                               (struct lttng_kernel_tracer_version __user *) arg);
        default:
                return -ENOIOCTLCMD;
        }