add capture file version check

1 files changed, 9 insertions, 5 deletions

diff --git a/systemtap/src/ioriot.stp b/systemtap/src/ioriot.stp
index 4029ebb..ee77263 100644
--- a/systemtap/src/ioriot.stp
+++ b/systemtap/src/ioriot.stp
@@ -71,6 +71,15 @@ function absolute_path (path) {
     return task_dentry_path(tc, pwd_dentry, pwd_mnt) . "/" . path;
 }
 
+# Stop probing after 1h (for safety)
+probe timer.s(3600) {
+    exit();
+}
+
+probe begin {
+    printf("#|capture_version=%d|\n", 2);
+}
+
 probe syscall.open.return, syscall.openat.return {
     if (execname() != "stapio") {
         pathname = user_string(@entry($filename))
@@ -597,9 +606,4 @@ probe syscall.exit_group {
     }
 }
 
-# Stop probing after 1h (for safety)
-probe timer.s(3600) {
-    exit();
-}
-
 # vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4