[Devel] [PATCH RHEL10 COMMIT] selftests/damon: add script dir to sys.path for PYTHONSAFEPATH compatibility

[Konstantin Khorenko <khorenko@virtuozzo.com>]

The commit is pushed to "branch-rh10-6.12.0-211.39.1.16.x.vz10-ovz" and will appear at git at bitbucket.org:openvz/vzkernel.git
after rh10-6.12.0-211.39.1.16.6.vz10
------>
commit e6c430f5a2cc31a0244492728ab9af8d0530710a
Author: Eva Kurchatova <eva.kurchatova@virtuozzo.com>
Date:   Fri Jun 26 14:34:27 2026 +0300

    selftests/damon: add script dir to sys.path for PYTHONSAFEPATH compatibility
    
    The RHEL10 import (commit 9f055df11343) changed the Python shebang from
    '#!/usr/bin/python3 -s' to '#!/usr/bin/python3 -sP'. The -P flag enables
    Python's safe path mode (PYTHONSAFEPATH, added in Python 3.11), which
    prevents prepending the script's directory to sys.path.
    
    This breaks all 7 DAMON Python selftests that import the _damon_sysfs
    helper module located in the same directory:
    
      ModuleNotFoundError: No module named '_damon_sysfs'
    
    Fix this by explicitly adding the script's directory to sys.path before
    importing _damon_sysfs, following the same pattern used in commit
    c3b3eb565bd7 ("tools: ynl: add script dir to sys.path") which fixed the
    identical issue for the YNL tools.
    
    Note: CentOS 10 Stream git does NOT have "-sP" due to some reason [1].
    
    [1] https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10/-/blob/main/tools/testing/selftests/damon/damon_nr_regions.py
    
    Fixes: 9f055df11343 ("rh10: import RHEL10 kernel-6.12.0-211.16.1.el10")
    https://virtuozzo.atlassian.net/browse/VSTOR-132453
    Feature: fix selftests
    Signed-off-by: Eva Kurchatova <eva.kurchatova@virtuozzo.com>
    Acked-by: Konstantin Khorenko <khorenko@virtuozzo.com>
---
 tools/testing/selftests/damon/damon_nr_regions.py                      | 3 +++
 tools/testing/selftests/damon/damos_apply_interval.py                  | 3 +++
 tools/testing/selftests/damon/damos_quota.py                           | 3 +++
 tools/testing/selftests/damon/damos_quota_goal.py                      | 3 +++
 tools/testing/selftests/damon/damos_tried_regions.py                   | 3 +++
 .../testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py | 3 +++
 .../damon/sysfs_update_schemes_tried_regions_wss_estimation.py         | 3 +++
 7 files changed, 21 insertions(+)

diff --git a/tools/testing/selftests/damon/damon_nr_regions.py b/tools/testing/selftests/damon/damon_nr_regions.py
index cb31cd140d220..8d0a352f7e85c 100755
--- a/tools/testing/selftests/damon/damon_nr_regions.py
+++ b/tools/testing/selftests/damon/damon_nr_regions.py
@@ -1,9 +1,12 @@
 #! /usr/bin/python3 -sP
 # SPDX-License-Identifier: GPL-2.0
 
+import os
 import subprocess
+import sys
 import time
 
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 import _damon_sysfs
 
 def test_nr_regions(real_nr_regions, min_nr_regions, max_nr_regions):
diff --git a/tools/testing/selftests/damon/damos_apply_interval.py b/tools/testing/selftests/damon/damos_apply_interval.py
index e81de3c06a8d2..b1d78397bc41d 100755
--- a/tools/testing/selftests/damon/damos_apply_interval.py
+++ b/tools/testing/selftests/damon/damos_apply_interval.py
@@ -1,9 +1,12 @@
 #! /usr/bin/python3 -sP
 # SPDX-License-Identifier: GPL-2.0
 
+import os
 import subprocess
+import sys
 import time
 
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 import _damon_sysfs
 
 def main():
diff --git a/tools/testing/selftests/damon/damos_quota.py b/tools/testing/selftests/damon/damos_quota.py
index 7498b9472e9f7..45b8b17f940a0 100755
--- a/tools/testing/selftests/damon/damos_quota.py
+++ b/tools/testing/selftests/damon/damos_quota.py
@@ -1,9 +1,12 @@
 #! /usr/bin/python3 -sP
 # SPDX-License-Identifier: GPL-2.0
 
+import os
 import subprocess
+import sys
 import time
 
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 import _damon_sysfs
 
 def main():
diff --git a/tools/testing/selftests/damon/damos_quota_goal.py b/tools/testing/selftests/damon/damos_quota_goal.py
index da43f69ed30db..a2d3abd780aeb 100755
--- a/tools/testing/selftests/damon/damos_quota_goal.py
+++ b/tools/testing/selftests/damon/damos_quota_goal.py
@@ -1,9 +1,12 @@
 #! /usr/bin/python3 -sP
 # SPDX-License-Identifier: GPL-2.0
 
+import os
 import subprocess
+import sys
 import time
 
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 import _damon_sysfs
 
 def main():
diff --git a/tools/testing/selftests/damon/damos_tried_regions.py b/tools/testing/selftests/damon/damos_tried_regions.py
index 7d1a44dbbe3df..188097475aa41 100755
--- a/tools/testing/selftests/damon/damos_tried_regions.py
+++ b/tools/testing/selftests/damon/damos_tried_regions.py
@@ -1,9 +1,12 @@
 #! /usr/bin/python3 -sP
 # SPDX-License-Identifier: GPL-2.0
 
+import os
 import subprocess
+import sys
 import time
 
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 import _damon_sysfs
 
 def main():
diff --git a/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py b/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py
index 1ae639549f6de..b0710fb371f14 100755
--- a/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py
+++ b/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_hang.py
@@ -1,9 +1,12 @@
 #! /usr/bin/python3 -sP
 # SPDX-License-Identifier: GPL-2.0
 
+import os
 import subprocess
+import sys
 import time
 
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 import _damon_sysfs
 
 def main():
diff --git a/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_wss_estimation.py b/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_wss_estimation.py
index b7d35ca4c129a..cd8d901b8263b 100755
--- a/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_wss_estimation.py
+++ b/tools/testing/selftests/damon/sysfs_update_schemes_tried_regions_wss_estimation.py
@@ -1,9 +1,12 @@
 #! /usr/bin/python3 -sP
 # SPDX-License-Identifier: GPL-2.0
 
+import os
 import subprocess
+import sys
 import time
 
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
 import _damon_sysfs
 
 def main():