1 files changed, 54 insertions, 0 deletions
diff --git a/test/py/tests/fs_helper.py b/test/py/tests/fs_helper.py
new file mode 100644
index 0000000000..2d8f1f63ad
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+++ b/test/py/tests/fs_helper.py
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier:      GPL-2.0+
+#
+# Helper functions for dealing with filesystems
+#
+# Copyright (c) 2018, Linaro Limited
+# Author: Takahiro Akashi <takahiro.akashi@linaro.org>
+
+import re
+import os
+from subprocess import call, check_call, check_output, CalledProcessError
+
+def mk_fs(config, fs_type, size, prefix):
+    """Create a file system volume
+
+    Args:
+        fs_type (str): File system type, e.g. 'ext4'
+        size (int): Size of file system in bytes
+        prefix (str): Prefix string of volume's file name
+    """
+    fs_img = '%s.%s.img' % (prefix, fs_type)
+    fs_img = config.persistent_data_dir + '/' + fs_img
+
+    if fs_type == 'fat16':
+        mkfs_opt = '-F 16'
+    elif fs_type == 'fat32':
+        mkfs_opt = '-F 32'
+    else:
+        mkfs_opt = ''
+
+    if re.match('fat', fs_type):
+        fs_lnxtype = 'vfat'
+    else:
+        fs_lnxtype = fs_type
+
+    count = (size + 1048576 - 1) / 1048576
+
+    # Some distributions do not add /sbin to the default PATH, where mkfs lives
+    if '/sbin' not in os.environ["PATH"].split(os.pathsep):
+        os.environ["PATH"] += os.pathsep + '/sbin'
+
+    try:
+        check_call('rm -f %s' % fs_img, shell=True)
+        check_call('dd if=/dev/zero of=%s bs=1M count=%d'
+            % (fs_img, count), shell=True)
+        check_call('mkfs.%s %s %s'
+            % (fs_lnxtype, mkfs_opt, fs_img), shell=True)
+        if fs_type == 'ext4':
+            sb_content = check_output('tune2fs -l %s' % fs_img, shell=True).decode()
+            if 'metadata_csum' in sb_content:
+                check_call('tune2fs -O ^metadata_csum %s' % fs_img, shell=True)
+        return fs_img
+    except CalledProcessError:
+        call('rm -f %s' % fs_img, shell=True)
+        raise