[PATCH v2 3/5] selftests/damon/_damon_sysfs: implement updat_schemes_tried_bytes command

[SeongJae Park <sj@kernel.org>]

Implement update_schemes_tried_bytes command of DAMON sysfs interface in
_damon_sysfs.py.  It is not only making the update, but also read the
updated value from the sysfs interface and store it in the Kdamond
python objects so that the user of the module can easily get the value.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 tools/testing/selftests/damon/_damon_sysfs.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tools/testing/selftests/damon/_damon_sysfs.py b/tools/testing/selftests/damon/_damon_sysfs.py
index 6b99f87a5f1e..e98cf4b6a4b7 100644
--- a/tools/testing/selftests/damon/_damon_sysfs.py
+++ b/tools/testing/selftests/damon/_damon_sysfs.py
@@ -76,6 +76,7 @@ class Damos:
     # todo: Support quotas, watermarks, stats, tried_regions
     idx = None
     context = None
+    tried_bytes = None
 
     def __init__(self, action='stat', access_pattern=DamosAccessPattern()):
         self.action = action
@@ -284,6 +285,19 @@ class Kdamond:
         err = write_file(os.path.join(self.sysfs_dir(), 'state'), 'on')
         return err
 
+    def update_schemes_tried_bytes(self):
+        err = write_file(os.path.join(self.sysfs_dir(), 'state'),
+                'update_schemes_tried_bytes')
+        if err != None:
+            return err
+        for context in self.contexts:
+            for scheme in context.schemes:
+                content, err = read_file(os.path.join(scheme.sysfs_dir(),
+                    'tried_regions', 'total_bytes'))
+                if err != None:
+                    return err
+                scheme.tried_bytes = int(content)
+
 class Kdamonds:
     kdamonds = []
 
-- 
2.34.1