From 68f294f0596af050ae3166df26d6c78848be2995 Mon Sep 17 00:00:00 2001
From: Sina Radmehr <sina_rad@hamravesh.com>
Date: Sat, 11 Sep 2021 03:18:33 +0430
Subject: [PATCH] tools/ttysnoop: Fix KFUNC_PROBE to support new iov_iter
 signature

Kernel commit [1] used ->iter_type and ->data_source instead of ->type

[1] 8cd54c1c8480 iov_iter: separate direction from flavour

Signed-off-by: Sina Radmehr <sina_rad@hamravesh.com>
---
 tools/ttysnoop.py | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tools/ttysnoop.py b/tools/ttysnoop.py
index 237f333c7f7c..ebddb4c0cb58 100755
--- a/tools/ttysnoop.py
+++ b/tools/ttysnoop.py
@@ -138,9 +138,20 @@ def usage():
 
     if (iocb->ki_filp->f_inode->i_ino != PTS)
         return 0;
-
+/**
+ * commit 8cd54c1c8480 iov_iter: separate direction from flavour 
+ * `type` is represented by iter_type and data_source seperately
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 14, 0)
     if (from->type != (ITER_IOVEC + WRITE))
         return 0;
+#else
+    if (from->iter_type != ITER_IOVEC)
+        return 0;
+    if (from->data_source != WRITE)
+        return 0;
+#endif
+
 
     kvec  = from->kvec;
     buf   = kvec->iov_base;