Add incremental load tests with core pool

ocf

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-Subproject commit a0740267731195260208f0d29857f740424a6c25
+Subproject commit 3aa68bcb15e513bb0a53934445fa9e4c75a77ba1

test/functional/test-framework

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-Subproject commit 0fb571232040ab6e39aedfc979b1fb8ef82245c3
+Subproject commit 588d6d72d93de63fbed334832ef529cb3ade0077

test/functional/tests/incremental_load/test_core_pool.py

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+#
+# Copyright(c) 2019 Intel Corporation
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+#
+import pytest
+
+from api.cas import casadm
+from api.cas.core import CoreStatus
+from core.test_run import TestRun
+from storage_devices.disk import DiskTypeSet, DiskType, DiskTypeLowerThan
+from test_tools.disk_utils import Filesystem
+from test_utils.output import CmdException
+from test_utils.size import Size, Unit
+
+
+@pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
+@pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
+def test_attach_core_pool():
+    """
+    title: Attaching from core pool on cache load.
+    description: |
+      Check that CAS has the ability on cache load to attach core devices that were added to
+      core device pool if those devices were previously used by cache instance being loaded.
+      Prevent attaching core device if they were not previously used.
+    pass_criteria:
+      - No system crash while reloading CAS modules.
+      - Core device was added successfully to core pool.
+      - Core device has been successfully attached to cache on cache load.
+      - Second core device was not attached to the cache instance.
+    """
+    with TestRun.step("Prepare devices."):
+        cache_disk = TestRun.disks["cache"]
+        cache_disk.create_partitions([Size(1, Unit.GibiByte)])
+        cache_dev = cache_disk.partitions[0]
+        core_disk = TestRun.disks["core"]
+        core_disk.create_partitions([Size(2, Unit.GibiByte), Size(2, Unit.GibiByte)])
+        core_dev = core_disk.partitions[0]
+        second_core_dev = core_disk.partitions[1]
+    with TestRun.step("Start cache."):
+        cache = casadm.start_cache(cache_dev, force=True)
+    with TestRun.step("Add core device."):
+        cache.add_core(core_dev)
+    with TestRun.step("Stop cache."):
+        cache.stop()
+    with TestRun.step("Add previously used core device to core pool using --try-add flag."):
+        first_core = casadm.try_add(core_dev, cache.cache_id)
+    with TestRun.step("Add different core device to core pool using --try-add flag."):
+        second_core = casadm.try_add(second_core_dev, cache.cache_id)
+    with TestRun.step("Load cache."):
+        cache = casadm.load_cache(cache_dev)
+    with TestRun.step("Check each core status."):
+        if first_core.get_status() is not CoreStatus.active:
+            TestRun.fail(f"First core status should be active but is {first_core.get_status()}.")
+        if second_core.get_status() is not CoreStatus.detached:
+            TestRun.fail(
+                f"Second core status should be detached but is {second_core.get_status()}.")
+    with TestRun.step("Stop cache and remove core from core pool."):
+        casadm.remove_all_detached_cores()
+        cache.stop()
+
+
+@pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
+@pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
+def test_core_pool_exclusive_open():
+    """
+    title: Exclusive open of core pool.
+    description: |
+      Check that CAS exclusively opens core devices from core device pool so that the core device
+      cannot be used in any other way.
+    pass_criteria:
+      - No system crash while reloading CAS modules.
+      - Core device was added successfully to core pool.
+      - Core device is exclusively open in the core pool and cannot be used otherwise.
+    """
+    with TestRun.step("Prepare core device and create filesystem on it."):
+        core_disk = TestRun.disks["core"]
+        core_disk.create_partitions([Size(1, Unit.GibiByte)])
+        core_dev = core_disk.partitions[0]
+        core_dev.create_filesystem(Filesystem.ext4)
+    with TestRun.step("Add core device to core device pool using --try-add flag."):
+        core = casadm.try_add(core_dev, 1)
+    with TestRun.step("Check if core status of added core in core pool is detached."):
+        status = core.get_status()
+        if status is not CoreStatus.detached:
+            TestRun.fail(f"Core status should be detached but is {status}.")
+    with TestRun.step("Check if it is impossible to add core device from core pool to "
+                      "running cache."):
+        TestRun.disks["cache"].create_partitions([Size(2, Unit.GibiByte)])
+        cache_dev = TestRun.disks["cache"].partitions[0]
+        cache = casadm.start_cache(cache_dev, force=True)
+        try:
+            cache.add_core(core_dev)
+            TestRun.fail("Core from core pool added to cache, this is unexpected behaviour.")
+        except CmdException:
+            TestRun.LOGGER.info("Adding core from core pool to cache is blocked as expected.")
+        cache.stop()
+    with TestRun.step("Check if it is impossible to start cache with casadm start command on the "
+                      "core device from core pool."):
+        try:
+            cache = casadm.start_cache(core_dev)
+            cache.stop()
+            TestRun.fail("Cache started successfully on core device from core pool, "
+                         "this is unexpected behaviour.")
+        except CmdException:
+            TestRun.LOGGER.info("Using core device from core pool as cache is blocked as expected.")
+    with TestRun.step("Check if it is impossible to make filesystem on the core device "
+                      "from core pool."):
+        try:
+            core_dev.create_filesystem(Filesystem.ext4, force=False)
+            TestRun.fail("Successfully created filesystem on core from core pool, "
+                         "this is unexpected behaviour.")
+        except Exception:
+            TestRun.LOGGER.info("Creating filesystem on core device from core pool is "
+                                "blocked as expected.")
+    with TestRun.step("Check if it is impossible to mount the core device from core pool."):
+        try:
+            core_dev.mount("/mnt")
+            TestRun.fail("Successfully mounted core pool device, this is unexpected behaviour.")
+        except Exception:
+            TestRun.LOGGER.info("Mounting core device form core pool is blocked as expected.")
+    with TestRun.step("Remove core from core pool."):
+        casadm.remove_all_detached_cores()