OS tools refactor

Signed-off-by: Katarzyna Treder <katarzyna.treder@h-partners.com>

test/functional/api/cas/cache.py

@@ -8,7 +8,7 @@ from api.cas.casadm_parser import *
 from api.cas.core import Core
 from api.cas.dmesg import get_metadata_size_on_device
 from api.cas.statistics import CacheStats, CacheIoClassStats
-from test_utils.os_utils import *
+from test_tools.os_tools import *
 from connection.utils.output import Output
 
 

test/functional/api/cas/cache_config.py

@@ -6,7 +6,7 @@
 
 from enum import Enum, IntFlag
 
-from test_utils.os_utils import get_kernel_module_parameter
+from test_tools.os_tools import get_kernel_module_parameter
 from types.size import Size, Unit
 from types.time import Time
 

test/functional/api/cas/cas_module.py

@@ -6,8 +6,7 @@
 
 from enum import Enum
 from core.test_run import TestRun
-from test_utils import os_utils
-from test_utils.os_utils import ModuleRemoveMethod
+from test_tools import os_tools
 
 
 class CasModule(Enum):
@@ -15,12 +14,12 @@ class CasModule(Enum):
 
 
 def reload_all_cas_modules():
-    os_utils.unload_kernel_module(CasModule.cache.value, ModuleRemoveMethod.modprobe)
-    os_utils.load_kernel_module(CasModule.cache.value)
+    os_tools.unload_kernel_module(CasModule.cache.value)
+    os_tools.load_kernel_module(CasModule.cache.value)
 
 
 def unload_all_cas_modules():
-    os_utils.unload_kernel_module(CasModule.cache.value, os_utils.ModuleRemoveMethod.rmmod)
+    os_tools.unload_kernel_module(CasModule.cache.value)
 
 
 def is_cas_management_dev_present():

test/functional/api/cas/casadm.py

@@ -20,7 +20,7 @@ from api.cas.cli import *
 from api.cas.core import Core
 from core.test_run import TestRun
 from storage_devices.device import Device
-from test_utils.os_utils import reload_kernel_module
+from test_tools.os_tools import reload_kernel_module
 from connection.utils.output import CmdException, Output
 from types.size import Size, Unit
 

test/functional/api/cas/core.py

@@ -16,7 +16,7 @@ from api.cas.statistics import CoreStats, CoreIoClassStats
 from core.test_run_utils import TestRun
 from storage_devices.device import Device
 from test_tools import fs_utils, disk_utils
-from test_utils.os_utils import sync
+from test_tools.os_tools import sync
 from test_tools.common.wait import wait
 from types.size import Unit, Size
 

test/functional/api/cas/installer.py

@@ -9,8 +9,7 @@ import os
 from core.test_run import TestRun
 from api.cas import cas_module
 from api.cas.version import get_installed_cas_version
-from test_utils import os_utils
-from test_tools import git
+from test_tools import git, os_tools
 from connection.utils.output import CmdException
 
 

test/functional/api/cas/ioclass_config.py

@@ -15,7 +15,7 @@ from packaging import version
 
 from core.test_run import TestRun
 from test_tools import fs_utils
-from test_utils import os_utils
+from test_tools.os_tools import get_kernel_version
 
 default_config_file_path = "/tmp/opencas_ioclass.conf"
 
@@ -166,7 +166,7 @@ class IoClass:
             "file_offset",
             "request_size",
         ]
-        if os_utils.get_kernel_version() >= version.Version("4.13"):
+        if get_kernel_version() >= version.Version("4.13"):
             rules.append("wlth")
 
         rule = random.choice(rules)

test/functional/test-framework

@@ -1 +1 @@
-Subproject commit ae9b036b4716934406a01f62277558f86a40bf46
+Subproject commit 7512420e2adbecf2a83847f963f61326d17c77fc

test/functional/tests/cache_ops/test_cleaning_policy_operation.py

@@ -18,7 +18,7 @@ from api.cas.cache_config import (
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from core.test_run import TestRun
 from types.size import Size, Unit
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
 

test/functional/tests/cache_ops/test_dynamic_cache_mode_switching.py

@@ -15,7 +15,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine, VerifyMethod
-from test_utils.os_utils import Udev, sync
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 io_size = Size(10000, Unit.Blocks4096)

test/functional/tests/cache_ops/test_multistream_seq_cutoff.py

@@ -24,7 +24,7 @@ from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 

test/functional/tests/cache_ops/test_seq_cutoff.py

@@ -15,7 +15,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine, CpusAllowedPolicy
-from test_utils.os_utils import Udev, sync, get_dut_cpu_physical_cores
+from test_tools.os_tools import sync, get_dut_cpu_physical_cores
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 

test/functional/tests/ci/test_ci_read_write.py

@@ -9,7 +9,7 @@ from api.cas import casadm
 from api.cas.cache_config import CacheMode
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Unit, Size
 from test_tools.dd import Dd
 from test_tools.iostat import IOstatBasic

test/functional/tests/cli/test_cas_memory_usage.py

@@ -9,14 +9,12 @@ import pytest
 from api.cas.cas_module import CasModule
 from core.test_run import TestRun
 from types.size import Unit
-from test_utils.os_utils import (allocate_memory,
-                                 disable_memory_affecting_functions,
-                                 drop_caches,
-                                 get_mem_free,
+from test_tools.os_tools import (drop_caches,
                                  is_kernel_module_loaded,
                                  load_kernel_module,
                                  unload_kernel_module,
                                  )
+from test_tools.memory import disable_memory_affecting_functions, get_mem_free, allocate_memory
 
 
 @pytest.mark.os_dependent

test/functional/tests/cli/test_cleaning_policy.py

@@ -15,7 +15,7 @@ from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
 from api.cas import casadm
 from api.cas.cache_config import CacheMode, CleaningPolicy
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 
 
 @pytest.mark.CI

test/functional/tests/cli/test_cli_script.py

@@ -8,7 +8,7 @@ import pytest
 
 from api.cas import casadm
 from core.test_run import TestRun
-from test_utils.os_utils import sync
+from test_tools.os_tools import sync
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from types.size import Unit, Size
 from test_tools.dd import Dd

test/functional/tests/cli/test_cli_standby.py

@@ -15,7 +15,7 @@ from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
 from test_utils.filesystem.file import File
-from test_utils.os_utils import sync
+from test_tools.os_tools import sync
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 from api.cas.cli_messages import (

test/functional/tests/cli/test_manual_casadm_flush.py

@@ -15,7 +15,7 @@ from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
 from api.cas import casadm
 from api.cas.cache_config import CacheMode, CleaningPolicy
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 
 
 @pytest.mark.CI

test/functional/tests/conftest.py

@@ -23,7 +23,8 @@ from api.cas import casadm
 from api.cas.cas_service import opencas_drop_in_directory
 from storage_devices.raid import Raid
 from storage_devices.ramdisk import RamDisk
-from test_utils.os_utils import Udev, kill_all_io
+from test_tools.os_tools import kill_all_io
+from test_tools.udev import Udev
 from test_utils.disk_finder import get_disk_serial_number
 from test_tools.disk_utils import PartitionTable, create_partition_table
 from test_tools.device_mapper import DeviceMapper

test/functional/tests/data_integrity/test_data_integrity_5d.py

@@ -18,7 +18,7 @@ from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine, VerifyMethod
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_utils.filesystem.file import File
-from test_utils.os_utils import sync
+from test_tools.os_tools import sync
 from types.size import Unit, Size
 
 

test/functional/tests/failover_standby/test_cache_activation_perf.py

@@ -10,7 +10,7 @@ from core.test_run import TestRun
 from test_tools.dd import Dd
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from storage_devices.disk import DiskType, DiskTypeSet
 from storage_devices.device import Device

test/functional/tests/failover_standby/test_failover_multihost.py

@@ -4,7 +4,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
-from time import sleep
 import pytest
 
 from api.cas import casadm
@@ -27,7 +26,8 @@ from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite
 from test_tools.fs_utils import readlink
 from test_utils.drbd import Resource, Node
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from test_tools import fs_utils
 

test/functional/tests/fault_injection/test_cache_insert_error.py

@@ -20,7 +20,7 @@ from test_tools.device_mapper import DmTable
 from storage_devices.error_device import ErrorDevice
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine, ErrorFilter, VerifyMethod
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 start_size = Size(512, Unit.Byte)

test/functional/tests/fault_injection/test_fault_injection_interrupts.py

@@ -14,8 +14,8 @@ from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
 from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
-from test_utils import os_utils
-from test_utils.os_utils import Udev, DropCachesMode
+from test_tools.os_tools import DropCachesMode, sync, drop_caches
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from tests.lazy_writes.recovery.recovery_tests_methods import compare_files
 
@@ -65,8 +65,8 @@ def test_interrupt_core_flush(cache_mode, filesystem):
             test_file_md5sum_before = test_file.md5sum()
 
         with TestRun.step("Get number of dirty data on exported object before interruption."):
-            os_utils.sync()
-            os_utils.drop_caches(DropCachesMode.ALL)
+            sync()
+            drop_caches(DropCachesMode.ALL)
             core_dirty_blocks_before = core.get_dirty_blocks()
 
         with TestRun.step("Start flushing core device."):
@@ -149,8 +149,8 @@ def test_interrupt_cache_flush(cache_mode, filesystem):
             test_file_md5sum_before = test_file.md5sum()
 
         with TestRun.step("Get number of dirty data on exported object before interruption."):
-            os_utils.sync()
-            os_utils.drop_caches(DropCachesMode.ALL)
+            sync()
+            drop_caches(DropCachesMode.ALL)
             cache_dirty_blocks_before = cache.get_dirty_blocks()
 
         with TestRun.step("Start flushing cache."):
@@ -238,8 +238,8 @@ def test_interrupt_core_remove(cache_mode, filesystem):
         with TestRun.step(
             "Get number of dirty data on exported object before core removal interruption"
         ):
-            os_utils.sync()
-            os_utils.drop_caches(DropCachesMode.ALL)
+            sync()
+            drop_caches(DropCachesMode.ALL)
             cache_dirty_blocks_before = cache.get_dirty_blocks()
 
         with TestRun.step("Unmount core"):
@@ -358,8 +358,8 @@ def test_interrupt_cache_mode_switch_parametrized(cache_mode, stop_percentage):
             dd.run()
 
         with TestRun.step("Get number of dirty data on exported object before interruption"):
-            os_utils.sync()
-            os_utils.drop_caches(DropCachesMode.ALL)
+            sync()
+            drop_caches(DropCachesMode.ALL)
             cache_dirty_blocks_before = cache.get_dirty_blocks()
 
         with TestRun.step("Start switching cache mode"):
@@ -450,8 +450,8 @@ def test_interrupt_cache_stop(cache_mode, filesystem):
             test_file = create_test_file()
 
         with TestRun.step("Get number of dirty data on exported object before interruption."):
-            os_utils.sync()
-            os_utils.drop_caches(DropCachesMode.ALL)
+            sync()
+            drop_caches(DropCachesMode.ALL)
             cache_dirty_blocks_before = cache.get_dirty_blocks()
 
         with TestRun.step("Unmount core."):

test/functional/tests/fault_injection/test_fault_injection_many_to_one.py

@@ -12,7 +12,7 @@ from api.cas.core import Core
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from core.test_run import TestRun
 from test_tools.dd import Dd
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 block_size = Size(1, Unit.Blocks4096)

test/functional/tests/fault_injection/test_fault_injection_opencas_load.py

@@ -5,13 +5,13 @@
 
 import pytest
 
+import test_tools.udev
 from api.cas import casadm, casadm_parser, cli, cli_messages
 from api.cas.cache_config import CacheMode, CleaningPolicy, CacheModeTrait
 from tests.lazy_writes.recovery.recovery_tests_methods import copy_file, compare_files
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
-from test_utils import os_utils
 from types.size import Size, Unit
 
 mount_point = "/mnt/cas"
@@ -99,5 +99,5 @@ def prepare():
     core_dev = TestRun.disks['core']
     core_dev.create_partitions([Size(2, Unit.GibiByte)])
     core_part = core_dev.partitions[0]
-    os_utils.Udev.disable()
+    test_tools.udev.Udev.disable()
     return cache_part, core_part

test/functional/tests/fault_injection/test_fault_injection_standby.py

@@ -15,7 +15,7 @@ from api.cas.cache_config import CacheLineSize, CacheMode
 from api.cas.cli import standby_activate_cmd, standby_load_cmd
 from api.cas.dmesg import get_md_section_size
 from test_tools.dd import Dd
-from test_utils.os_utils import sync
+from test_tools.os_tools import sync
 from test_utils.filesystem.file import File
 
 

test/functional/tests/fault_injection/test_max_io_greater_in_core.py

@@ -9,7 +9,7 @@ from api.cas.cache_config import CacheMode, CacheLineSize
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet
 from test_tools.dd import Dd
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 

test/functional/tests/fault_injection/test_primary_device_error.py

@@ -19,7 +19,7 @@ from api.cas.cache_config import (
     CleaningPolicy,
 )
 from storage_devices.disk import DiskTypeSet, DiskType, DiskTypeLowerThan
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 

test/functional/tests/fault_injection/test_standby_activate_different_cache_path.py

@@ -16,7 +16,7 @@ from api.cas.cache_config import CacheLineSize
 from api.cas.cache import CacheStatus
 from test_tools.dd import Dd
 from test_tools.fs_utils import check_if_symlink_exists
-from test_utils.os_utils import sync
+from test_tools.os_tools import sync
 
 
 @pytest.mark.CI

test/functional/tests/incremental_load/test_incremental_load.py

@@ -29,7 +29,8 @@ from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
 from test_utils.filesystem.file import File
-from test_utils.os_utils import Udev, sync
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 from types.time import Time

test/functional/tests/initialize/test_clean_reboot.py

@@ -14,7 +14,7 @@ from storage_devices.disk import DiskTypeSet, DiskType, DiskTypeLowerThan
 from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
 from test_utils.filesystem.file import File
-from test_utils.os_utils import drop_caches, DropCachesMode, sync
+from test_tools.os_tools import drop_caches, DropCachesMode, sync
 from types.size import Size, Unit
 
 

test/functional/tests/initialize/test_initialize_runlevel.py

@@ -6,6 +6,8 @@
 import os
 import pytest
 import time
+
+import test_tools.runlevel
 from api.cas import casadm, casadm_parser
 from api.cas.cache_config import CacheMode
 from api.cas.init_config import InitConfig
@@ -14,8 +16,8 @@ from storage_devices.disk import DiskTypeLowerThan, DiskTypeSet, DiskType
 from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils import os_utils
-from test_utils.os_utils import Runlevel
+from test_tools.os_tools import sync, drop_caches
+from test_tools.runlevel import Runlevel
 from types.size import Size, Unit
 
 
@@ -36,7 +38,7 @@ def test_init_reboot_runlevels(runlevel, cache_mode):
           - Cache should be loaded successfully after reboot.
     """
     with TestRun.step(f"Set runlevel to {runlevel.value}."):
-        os_utils.change_runlevel(runlevel)
+        test_tools.runlevel.change_runlevel(runlevel)
 
     with TestRun.step("Prepare CAS device."):
         cache_disk = TestRun.disks['cache']
@@ -65,8 +67,8 @@ def test_init_reboot_runlevels(runlevel, cache_mode):
             .file_size(Size(30, Unit.GibiByte))
 
         fio.run_in_background()
-        os_utils.sync()
-        os_utils.drop_caches()
+        sync()
+        drop_caches()
 
         time.sleep(10)
         TestRun.executor.run_expect_success("pgrep fio")
@@ -86,5 +88,5 @@ def test_init_reboot_runlevels(runlevel, cache_mode):
     with TestRun.step("Stop cache and set default runlevel."):
         if len(caches) != 0:
             casadm.stop_all_caches()
-        os_utils.change_runlevel(Runlevel.runlevel3)
+        test_tools.runlevel.change_runlevel(Runlevel.runlevel3)
         TestRun.executor.reboot()

test/functional/tests/initialize/test_initialize_status.py

@@ -10,7 +10,7 @@ import pytest
 from api.cas import cas_module, casctl
 from api.cas.cas_module import CasModule
 from core.test_run import TestRun
-from test_utils import os_utils
+from test_tools.os_tools import load_kernel_module
 
 
 @pytest.mark.os_dependent
@@ -46,5 +46,5 @@ def test_init_status():
             TestRun.fail("CAS management device is present in OS when CAS module is not loaded.")
 
     with TestRun.step("Load CAS modules and start CAS service"):
-        os_utils.load_kernel_module(CasModule.cache.value)
+        load_kernel_module(CasModule.cache.value)
         casctl.start()

test/functional/tests/initialize/test_recovery.py

@@ -17,7 +17,7 @@ from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
 from test_tools.fs_utils import check_if_file_exists
 from test_utils.filesystem.file import File
-from test_utils.os_utils import sync
+from test_tools.os_tools import sync
 from types.size import Size, Unit
 
 mount_point = "/mnt/cas"

test/functional/tests/initialize/test_startup_init_config.py

@@ -18,7 +18,8 @@ from test_tools.disk_utils import Filesystem
 from test_tools import fstab
 from test_tools.dd import Dd
 from types.size import Unit, Size
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from test_utils.emergency_escape import EmergencyEscape
 from api.cas.cas_service import set_cas_service_timeout, clear_cas_service_timeout
 

test/functional/tests/io/test_io_engines.py

@@ -14,7 +14,7 @@ from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, CpusAllowedPolicy, ReadWrite
-from test_utils.os_utils import get_dut_cpu_physical_cores
+from test_tools.os_tools import get_dut_cpu_physical_cores
 from types.size import Size, Unit
 
 mount_point = "/mnt/test"

test/functional/tests/io/test_write_fetch.py

@@ -13,7 +13,7 @@ from storage_devices.disk import DiskTypeSet, DiskTypeLowerThan, DiskType
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
 from test_utils.filesystem.symlink import Symlink
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 

test/functional/tests/io/trim/test_trim.py

@@ -3,12 +3,13 @@
 # Copyright(c) 2024 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
-import os
 import posixpath
 import time
 
 import pytest
 
+from test_tools.os_tools import sync, drop_caches
+from test_tools.udev import Udev
 from api.cas import casadm
 from api.cas.cache_config import CacheMode, CacheModeTrait, CleaningPolicy, SeqCutOffPolicy
 from core.test_run import TestRun
@@ -18,7 +19,6 @@ from test_tools.blktrace import BlkTrace, BlkTraceMask, RwbsKind
 from test_tools.disk_utils import Filesystem, check_if_device_supports_trim
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils import os_utils
 from types.size import Size, Unit
 from api.cas.dmesg import get_metadata_size_on_device
 
@@ -129,7 +129,7 @@ def test_trim_propagation():
             raise Exception("Core device doesn't support discards")
 
     with TestRun.step(f"Disable udev"):
-        os_utils.Udev.disable()
+        Udev.disable()
 
     with TestRun.step(f"Prepare cache instance in WB with one core"):
         cache = casadm.start_cache(cache_dev, CacheMode.WB, force=True)
@@ -161,7 +161,7 @@ def test_trim_propagation():
     with TestRun.step("Power cycle"):
         power_control = TestRun.plugin_manager.get_plugin("power_control")
         power_control.power_cycle()
-        os_utils.Udev.disable()
+        Udev.disable()
 
     with TestRun.step("Load cache"):
         cache = casadm.start_cache(cache_dev, load=True)
@@ -246,8 +246,8 @@ def test_trim_device_discard_support(
 
     with TestRun.step("Remove file."):
         test_file.remove()
-        os_utils.sync()
-        os_utils.drop_caches()
+        sync()
+        drop_caches()
         time.sleep(5)
 
     with TestRun.step("Ensure that discards were detected by blktrace on proper devices."):
@@ -315,8 +315,8 @@ def compare_properties(value, expected_value, property_name):
 
 def stop_monitoring_and_check_discards(blktraces, discard_support):
     time.sleep(60)
-    os_utils.sync()
-    os_utils.drop_caches()
+    sync()
+    drop_caches()
     time.sleep(5)
 
     discard_flag = RwbsKind.D  # Discard

test/functional/tests/io_class/io_class_common.py

@@ -16,8 +16,9 @@ from core.test_run import TestRun
 from test_tools.dd import Dd
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import Udev, sync
-from test_utils.os_utils import drop_caches, DropCachesMode
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
+from test_tools.os_tools import drop_caches, DropCachesMode
 from types.size import Size, Unit
 
 ioclass_config_path = "/etc/opencas/ioclass.conf"

test/functional/tests/io_class/test_io_class_core_id.py

@@ -10,7 +10,8 @@ from api.cas.cache_config import CacheMode, CleaningPolicy, SeqCutOffPolicy
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.dd import Dd
-from test_utils.os_utils import sync, Udev, drop_caches
+from test_tools.os_tools import sync, drop_caches
+from test_tools.udev import Udev
 from types.size import Unit, Size
 
 dd_bs = Size(1, Unit.Blocks4096)

test/functional/tests/io_class/test_io_class_directory.py

@@ -17,7 +17,8 @@ from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
 from test_utils.filesystem.directory import Directory
 from test_utils.filesystem.file import File
-from test_utils.os_utils import drop_caches, DropCachesMode, sync, Udev
+from test_tools.os_tools import drop_caches, DropCachesMode, sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from tests.io_class.io_class_common import mountpoint, prepare, ioclass_config_path
 

test/functional/tests/io_class/test_io_class_eviction_pinned_after_unpin.py

@@ -12,7 +12,8 @@ from core.test_run import TestRun
 from api.cas.cache_config import CacheMode, CleaningPolicy, SeqCutOffPolicy
 from .io_class_common import ioclass_config, get_io_class_occupancy, run_io_dir
 from api.cas import casadm
-from test_utils.os_utils import sync, Udev, drop_caches
+from test_tools.os_tools import sync, drop_caches
+from test_tools.udev import Udev
 from types.size import Unit, Size
 
 

test/functional/tests/io_class/test_io_class_file.py

@@ -13,7 +13,7 @@ from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
 from test_utils.filesystem.file import File
-from test_utils.os_utils import sync, DropCachesMode, drop_caches
+from test_tools.os_tools import sync, DropCachesMode, drop_caches
 from types.size import Size, Unit
 from tests.io_class.io_class_common import mountpoint, prepare, ioclass_config_path
 

test/functional/tests/io_class/test_io_class_occupancy.py

@@ -16,7 +16,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
 from test_tools.disk_utils import Filesystem
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Unit, Size
 from tests.io_class.io_class_common import (
     prepare,

test/functional/tests/io_class/test_io_class_occupancy_load.py

@@ -15,7 +15,8 @@ from storage_devices.device import Device
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
 from test_tools.disk_utils import Filesystem
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from tests.io_class.io_class_common import (
     prepare,
     mountpoint,

test/functional/tests/io_class/test_io_class_occupancy_repart.py

@@ -15,7 +15,8 @@ from core.test_run_utils import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
 from test_tools.disk_utils import Filesystem
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Unit
 from tests.io_class.io_class_common import (
     prepare,

test/functional/tests/io_class/test_io_class_occupancy_resize.py

@@ -13,7 +13,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
 from test_tools.disk_utils import Filesystem
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Unit
 from tests.io_class.io_class_common import (
     mountpoint,

test/functional/tests/io_class/test_io_class_process.py

@@ -11,7 +11,8 @@ from api.cas import ioclass_config, casadm
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.dd import Dd
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from tests.io_class.io_class_common import prepare, ioclass_config_path
 

test/functional/tests/io_class/test_io_class_purge.py

@@ -14,7 +14,8 @@ from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
 from test_tools.dd import Dd
 from test_tools.disk_utils import Filesystem
-from test_utils.os_utils import drop_caches, DropCachesMode, sync, Udev
+from test_tools.os_tools import drop_caches, DropCachesMode, sync
+from test_tools.udev import Udev
 from types.size import Unit, Size
 from tests.io_class.io_class_common import prepare, mountpoint, ioclass_config_path
 

test/functional/tests/io_class/test_io_class_service_support.py

@@ -6,6 +6,8 @@
 import os
 import pytest
 from datetime import timedelta
+
+import test_tools.runlevel
 from api.cas import ioclass_config, casadm_parser
 from api.cas.cache_config import CacheMode
 from api.cas.casadm_params import StatsFilter
@@ -17,8 +19,8 @@ from test_tools import fs_utils
 from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
-from test_utils import os_utils
-from test_utils.os_utils import Runlevel
+from test_tools.os_tools import sync, drop_caches
+from test_tools.runlevel import Runlevel
 from types.size import Size, Unit
 from tests.io_class.io_class_common import (
     prepare,
@@ -73,10 +75,10 @@ def test_io_class_service_load(runlevel):
         InitConfig.create_init_config_from_running_configuration(
             cache_extra_flags=f"ioclass_file={ioclass_config_path}"
         )
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Reboot system to runlevel {runlevel}."):
-        os_utils.change_runlevel(runlevel)
+        test_tools.runlevel.change_runlevel(runlevel)
         TestRun.executor.reboot()
 
     with TestRun.step(
@@ -152,8 +154,8 @@ def run_io():
     )
     fio.run()
 
-    os_utils.sync()
-    os_utils.drop_caches()
+    sync()
+    drop_caches()
 
 
 def prepare_and_load_io_class_config(cache, metadata_not_cached=False):

test/functional/tests/io_class/test_io_class_stats_file_size_core.py

@@ -17,7 +17,7 @@ from test_tools import fs_utils
 from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
-from test_utils.os_utils import sync, drop_caches
+from test_tools.os_tools import sync, drop_caches
 from types.size import Size, Unit
 from tests.io_class.io_class_common import template_config_path
 

test/functional/tests/io_class/test_io_class_wlth.py

@@ -10,7 +10,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import sync, Udev, drop_caches
+from test_tools.os_tools import sync, drop_caches
+from test_tools.udev import Udev
 from types.size import Unit, Size
 from tests.io_class.io_class_common import prepare
 

test/functional/tests/io_class/test_io_classification.py

@@ -19,7 +19,8 @@ from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
 from test_utils.filesystem.file import File
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from tests.io_class.io_class_common import prepare, ioclass_config_path, mountpoint
 

test/functional/tests/lazy_writes/cleaning_policy/test_acp.py

@@ -24,7 +24,7 @@ from storage_devices.disk import DiskTypeSet, DiskTypeLowerThan, DiskType
 from test_tools.blktrace import BlkTrace, BlkTraceMask, ActionKind, RwbsKind
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
-from test_utils.os_utils import kill_all_io
+from test_tools.os_tools import kill_all_io
 from types.size import Size, Unit
 from types.time import Time
 

test/functional/tests/lazy_writes/cleaning_policy/test_alru.py

@@ -14,7 +14,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import Udev, kill_all_io
+from test_tools.os_tools import kill_all_io
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from types.time import Time
 

test/functional/tests/lazy_writes/cleaning_policy/test_cleaning_params.py

@@ -18,7 +18,7 @@ from api.cas.cache_config import (
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.dd import Dd
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 from types.time import Time
 

test/functional/tests/lazy_writes/recovery/recovery_tests_methods.py

@@ -9,7 +9,6 @@ import test_tools.common.wait
 from core.test_run import TestRun
 from test_tools import fs_utils
 from test_tools.dd import Dd
-from test_utils import os_utils
 from test_utils.filesystem.file import File
 from types.size import Size, Unit
 

test/functional/tests/lazy_writes/recovery/test_recovery_all_options.py

@@ -15,9 +15,8 @@ from storage_devices.disk import DiskTypeSet, DiskType, DiskTypeLowerThan
 from test_tools.disk_utils import Filesystem
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
-from test_utils import os_utils
 from test_utils.filesystem.file import File
-from test_utils.os_utils import DropCachesMode
+from test_tools.os_tools import DropCachesMode, drop_caches, sync
 from types.size import Size, Unit
 from types.time import Time
 from tests.lazy_writes.recovery.recovery_tests_methods import power_cycle_dut
@@ -63,7 +62,7 @@ def test_recovery_all_options(cache_mode, cache_line_size, cleaning_policy, file
     with TestRun.step("Mount core device."):
         core_device.mount(mount_point)
         file_operation(test_file.full_path, other_pattern, ReadWrite.write)
-        os_utils.drop_caches(DropCachesMode.ALL)
+        drop_caches(DropCachesMode.ALL)
 
     with TestRun.step("Unmount core device."):
         core_device.unmount()
@@ -85,9 +84,9 @@ def test_recovery_all_options(cache_mode, cache_line_size, cleaning_policy, file
         cache.set_cache_mode(CacheMode.WT, flush=False)
 
     with TestRun.step("Reset platform."):
-        os_utils.sync()
+        sync()
         core.unmount()
-        os_utils.drop_caches(DropCachesMode.ALL)
+        drop_caches(DropCachesMode.ALL)
         TestRun.LOGGER.info(f"Number of dirty blocks in cache: {cache.get_dirty_blocks()}")
         power_cycle_dut()
 

test/functional/tests/lazy_writes/recovery/test_recovery_flush_reset.py

@@ -13,8 +13,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskTypeSet, DiskType, DiskTypeLowerThan
 from test_tools.disk_utils import Filesystem
 from test_tools.fs_utils import readlink
-from test_utils import os_utils
-from test_utils.os_utils import Udev, DropCachesMode
+from test_tools.os_tools import DropCachesMode, sync, drop_caches
+from test_tools.udev import Udev
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 from tests.lazy_writes.recovery.recovery_tests_methods import create_test_files, copy_file, \
@@ -62,13 +62,13 @@ def test_recovery_flush_reset_raw(cache_mode):
                   direct="oflag")
 
     with TestRun.step("Sync and flush buffers."):
-        os_utils.sync()
+        sync()
         output = TestRun.executor.run(f"hdparm -f {core.path}")
         if output.exit_code != 0:
             raise CmdException("Error during hdparm", output)
 
     with TestRun.step("Trigger flush."):
-        os_utils.drop_caches(DropCachesMode.ALL)
+        drop_caches(DropCachesMode.ALL)
         TestRun.executor.run_in_background(cli.flush_cache_cmd(f"{cache.cache_id}"))
 
     with TestRun.step("Hard reset DUT during data flushing."):

test/functional/tests/lazy_writes/test_clean_load.py

@@ -10,7 +10,7 @@ from core.test_run_utils import TestRun
 from storage_devices.disk import DiskTypeSet, DiskType, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 

test/functional/tests/lazy_writes/test_flush_huge_dirty_data.py

@@ -18,7 +18,8 @@ from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
 from test_tools.fs_utils import remove
 from test_utils.filesystem.file import File
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 file_size = Size(640, Unit.GiB)

test/functional/tests/lazy_writes/test_lazy_writes_clean.py

@@ -15,7 +15,8 @@ from test_tools.disk_utils import Filesystem
 from test_tools.fs_utils import create_random_test_file, remove
 from test_tools.iostat import IOstatBasic
 from test_utils.filesystem.file import File
-from test_utils.os_utils import Udev, sync
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 bs = Size(512, Unit.KibiByte)

test/functional/tests/lazy_writes/test_lazy_writes_signals.py

@@ -16,8 +16,8 @@ from storage_devices.disk import DiskType, DiskTypeSet
 from core.test_run import TestRun
 from test_tools.disk_utils import Filesystem
 from test_tools.fs_utils import create_random_test_file
+from test_tools.os_tools import sync
 from test_tools.scsi_debug import Logs, syslog_path
-from test_utils import os_utils
 from types.size import Size, Unit
 
 mount_point = "/mnt/cas"
@@ -60,11 +60,11 @@ def test_flush_signal_core(cache_mode):
 
     with TestRun.step("Create temporary file on exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Flush cache."):
         cache.flush_cache()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush request and delete temporary file."):
         Logs.check_syslog_for_signals()
@@ -72,11 +72,11 @@ def test_flush_signal_core(cache_mode):
 
     with TestRun.step("Create temporary file on exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Flush core."):
         core.flush_core()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush request and delete temporary file."):
         Logs.check_syslog_for_signals()
@@ -90,7 +90,7 @@ def test_flush_signal_core(cache_mode):
 
     with TestRun.step("Create big temporary file on exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(5, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Wait for automatic flush from alru cleaning policy and check log."):
         wait_time = (
@@ -107,12 +107,12 @@ def test_flush_signal_core(cache_mode):
 
     with TestRun.step("Create temporary file on exported object."):
         create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Unmount exported object and remove it from cache."):
         core.unmount()
         core.remove_core()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush request."):
         Logs.check_syslog_for_signals()
@@ -158,11 +158,11 @@ def test_flush_signal_cache(cache_mode):
 
     with TestRun.step("Create temporary file on exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Flush cache."):
         cache.flush_cache()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush and FUA requests and delete temporary file."):
         Logs.check_syslog_for_signals()
@@ -170,11 +170,11 @@ def test_flush_signal_cache(cache_mode):
 
     with TestRun.step("Create temporary file on exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Flush core."):
         core.flush_core()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush request and delete temporary file."):
         Logs.check_syslog_for_signals()
@@ -188,7 +188,7 @@ def test_flush_signal_cache(cache_mode):
 
     with TestRun.step("Create big temporary file on exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(5, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Wait for automatic flush from alru cleaning policy and check log."):
         wait_time = (
@@ -205,12 +205,12 @@ def test_flush_signal_cache(cache_mode):
 
     with TestRun.step("Create temporary file on exported object."):
         create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Unmount exported object and remove it from cache."):
         core.unmount()
         core.remove_core()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush and FUA requests."):
         Logs.check_syslog_for_signals()
@@ -262,12 +262,12 @@ def test_flush_signal_multilevel_cache(cache_mode):
 
     with TestRun.step("Create temporary file on the 2nd exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(512, Unit.MebiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Flush both caches."):
         cache2.flush_cache()
         cache1.flush_cache()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush and FUA requests and delete temporary file."):
         Logs.check_syslog_for_signals()
@@ -275,12 +275,12 @@ def test_flush_signal_multilevel_cache(cache_mode):
 
     with TestRun.step("Create temporary file on the 2nd exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(512, Unit.MebiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Flush both cores."):
         core2.flush_core()
         core1.flush_core()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush request and delete temporary file."):
         Logs.check_syslog_for_signals()
@@ -298,7 +298,7 @@ def test_flush_signal_multilevel_cache(cache_mode):
 
     with TestRun.step("Create big temporary file on the 2nd exported object."):
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(3, Unit.GibiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Wait for automatic flush from alru cleaning policy and check log."):
         wait_time = (
@@ -315,13 +315,13 @@ def test_flush_signal_multilevel_cache(cache_mode):
 
     with TestRun.step("Create temporary file on the 2nd exported object."):
         create_random_test_file(f"{mount_point}/tmp.file", Size(512, Unit.MebiByte))
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Unmount the 2nd exported object and remove cores from caches."):
         core2.unmount()
         core2.remove_core()
         core1.remove_core()
-        os_utils.sync()
+        sync()
 
     with TestRun.step(f"Check {syslog_path} for flush request."):
         Logs.check_syslog_for_signals()

test/functional/tests/lazy_writes/test_wb_throttling.py

@@ -12,25 +12,19 @@ from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
 from test_tools.iostat import IOstatExtended
-from test_utils.os_utils import (
+from test_tools.os_tools import (
     kill_all_io,
     set_wbt_lat,
     get_wbt_lat,
-    get_dut_cpu_number,
 )
 from test_tools.common.wait import wait
 from api.cas import casadm
 from api.cas.cache_config import (
     CacheMode,
-    CacheModeTrait,
     CleaningPolicy,
-    FlushParametersAcp,
     SeqCutOffPolicy,
     CacheLineSize,
-    Time,
 )
-from test_tools.blktrace import BlkTrace, BlkTraceMask, ActionKind, RwbsKind
-
 
 runtime = timedelta(days=30)
 

test/functional/tests/memory/test_check_number_of_processes.py

@@ -8,7 +8,7 @@ import pytest
 from api.cas import casadm
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
-from test_utils.os_utils import (get_number_of_processors_from_cpuinfo,
+from test_tools.os_tools import (get_number_of_processors_from_cpuinfo,
                                  get_number_of_processes)
 from types.size import Size, Unit
 

test/functional/tests/memory/test_memory_metadata_consumption.py

@@ -13,8 +13,9 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import get_mem_available, get_module_mem_footprint
-from test_utils.os_utils import sync, Udev
+from test_tools.memory import get_mem_available, get_module_mem_footprint
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 cores_count = 16

test/functional/tests/misc/test_flush_propagation.py

@@ -15,9 +15,9 @@ from api.cas.cache_config import (
 from storage_devices.disk import DiskType, DiskTypeSet
 from core.test_run import TestRun
 from test_tools.disk_utils import Filesystem
+from test_tools.os_tools import sync
 from test_tools.scsi_debug import Logs, syslog_path
 from test_tools.fs_utils import create_random_test_file
-from test_utils import os_utils
 from types.size import Size, Unit
 
 mount_point = "/mnt/cas"
@@ -56,12 +56,12 @@ def test_flush_signal_propagation_cache():
         if core.is_mounted():
             core.unmount()
         core.mount(mount_point)
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Create temporary file on the exported object."):
         Logs._read_syslog(Logs.last_read_line)
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
         sleep(3)
 
     with TestRun.step(f"Check {syslog_path} for flush request and delete temporary file."):
@@ -102,12 +102,12 @@ def test_flush_signal_propagation_core():
         if core.is_mounted():
             core.unmount()
         core.mount(mount_point)
-        os_utils.sync()
+        sync()
 
     with TestRun.step("Create temporary file on the exported object."):
         Logs._read_syslog(Logs.last_read_line)
         tmp_file = create_random_test_file(f"{mount_point}/tmp.file", Size(1, Unit.GibiByte))
-        os_utils.sync()
+        sync()
         sleep(3)
 
     with TestRun.step(f"Check {syslog_path} for flush request and delete temporary file."):

test/functional/tests/performance/test_100p_hits.py

@@ -17,7 +17,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskTypeSet, DiskTypeLowerThan, DiskType
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import IoEngine, ReadWrite
-from test_utils.os_utils import Udev, set_wbt_lat, get_dut_cpu_physical_cores
+from test_tools.os_tools import set_wbt_lat, get_dut_cpu_physical_cores
+from test_tools.udev import Udev
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 from utils.performance import WorkloadParameter

test/functional/tests/performance/test_performance_reads.py

@@ -13,7 +13,7 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine, CpusAllowedPolicy
-from test_utils.os_utils import (
+from test_tools.os_tools import (
     get_number_of_processors_from_cpuinfo,
     set_wbt_lat,
     get_dut_cpu_physical_cores,

test/functional/tests/performance/test_performance_write.py

@@ -13,7 +13,7 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine, CpusAllowedPolicy
-from test_utils.os_utils import (
+from test_tools.os_tools import (
     set_wbt_lat,
     get_number_of_processors_from_cpuinfo,
     get_dut_cpu_physical_cores,

test/functional/tests/security/fuzzy/kernel/fuzzy_add_core/test_fuzzy_add_core_cache_id.py

@@ -20,7 +20,7 @@ from api.cas.cli import add_core_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     get_fuzz_config,
     run_cmd_and_validate,

test/functional/tests/security/fuzzy/kernel/fuzzy_add_core/test_fuzzy_add_core_core_id.py

@@ -24,7 +24,7 @@ from tests.security.fuzzy.kernel.common.common import (
     get_fuzz_config,
     run_cmd_and_validate,
 )
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 
 core_id_min = 0
 core_id_max = 4095

test/functional/tests/security/fuzzy/kernel/fuzzy_add_core/test_fuzzy_add_core_device.py

@@ -20,7 +20,7 @@ from api.cas.cli import add_core_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     run_cmd_and_validate,
     get_device_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_add_core/test_fuzzy_script_add_core_try_add_cache_id.py

@@ -9,7 +9,7 @@ from api.cas.cli import script_try_add_cmd, remove_detached_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskTypeSet, DiskType
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     run_cmd_and_validate,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_add_core/test_fuzzy_script_add_core_try_add_core_id.py

@@ -9,7 +9,7 @@ from api.cas.cli import script_try_add_cmd, remove_detached_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskTypeSet, DiskType
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     run_cmd_and_validate,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_add_core/test_fuzzy_script_add_core_try_add_device.py

@@ -7,7 +7,7 @@
 from api.cas.cli import script_try_add_cmd, remove_detached_cmd
 from core.test_run import TestRun
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     run_cmd_and_validate,
     get_device_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_start/test_fuzzy_start_cache_flags.py

@@ -19,7 +19,7 @@ from api.cas.cli import start_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Unit, Size
 from tests.security.fuzzy.kernel.common.common import (
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_stop_remove/test_fuzzy_remove_core_cache_id.py

@@ -18,7 +18,7 @@ from api.cas.cli import remove_core_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     prepare_cas_instance,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_stop_remove/test_fuzzy_remove_core_core_id.py

@@ -18,7 +18,7 @@ from api.cas.cli import remove_core_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     prepare_cas_instance,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_stop_remove/test_fuzzy_remove_core_flag.py

@@ -17,7 +17,7 @@ from api.cas.cli import remove_core_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     prepare_cas_instance,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_stop_remove/test_fuzzy_remove_inactive_cache_id.py

@@ -20,7 +20,7 @@ from api.cas.init_config import InitConfig
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     prepare_cas_instance,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_stop_remove/test_fuzzy_remove_inactive_core_id.py

@@ -19,7 +19,7 @@ from api.cas.init_config import InitConfig
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     prepare_cas_instance,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_stop_remove/test_fuzzy_stop_cache_cache_id.py

@@ -18,7 +18,7 @@ from api.cas.cli import stop_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     prepare_cas_instance,
     get_fuzz_config,

test/functional/tests/security/fuzzy/kernel/fuzzy_stop_remove/test_fuzzy_stop_cache_flag.py

@@ -18,7 +18,7 @@ from api.cas.cli import stop_cmd
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.peach_fuzzer.peach_fuzzer import PeachFuzzer
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from tests.security.fuzzy.kernel.common.common import (
     prepare_cas_instance,
     get_fuzz_config,

test/functional/tests/security/test_security_user.py

@@ -14,7 +14,7 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools import fs_utils
 from test_tools.disk_utils import Filesystem
-from test_utils.os_utils import create_user, check_if_user_exists
+from test_tools.os_tools import create_user, check_if_user_exists
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 

test/functional/tests/stats/test_block_stats.py

@@ -15,7 +15,7 @@ from api.cas.statistics import get_stats_dict, get_stat_value, OperationType
 from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.dd import Dd
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 iterations = 10

test/functional/tests/stats/test_ioclass_stats.py

@@ -17,7 +17,6 @@ from api.cas.cli_messages import (
 )
 from api.cas.statistics import (
     config_stats_ioclass,
-    usage_stats,
     usage_stats_ioclass,
     request_stats,
     block_stats_core,
@@ -27,7 +26,8 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.disk_utils import Filesystem
 from test_utils.filesystem.file import File
-from test_utils.os_utils import sync, Udev
+from test_tools.os_tools import sync
+from test_tools.udev import Udev
 from connection.utils.output import CmdException
 from types.size import Size, Unit
 

test/functional/tests/stats/test_stat_max.py

@@ -16,7 +16,7 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 cache_size = Size(1, Unit.GibiByte)

test/functional/tests/stats/test_statistics_integrity.py

@@ -16,7 +16,7 @@ from core.test_run import TestRun
 from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from types.size import Size, Unit
 
 # One cache instance per every cache mode:

test/functional/tests/stress/test_stress_cleaning_policy_change.py

@@ -16,7 +16,7 @@ from storage_devices.disk import DiskType, DiskTypeSet, DiskTypeLowerThan
 from core.test_run import TestRun
 from test_tools.disk_utils import Filesystem
 from types.size import Size, Unit
-from test_utils.os_utils import Udev
+from test_tools.udev import Udev
 from test_tools.fio.fio import Fio
 from test_tools.fio.fio_param import ReadWrite, IoEngine
 

test/functional/tests/volumes/common.py

@@ -7,7 +7,7 @@
 from api.cas.init_config import InitConfig, opencas_conf_path
 from test_tools import fs_utils
 from core.test_run import TestRun
-from test_utils.os_utils import get_block_device_names_list
+from test_tools.disk_utils import get_block_device_names_list
 from types.size import Size, Unit
 
 test_file_size = Size(500, Unit.KiloByte)