173 lines
8.4 KiB
Diff
173 lines
8.4 KiB
Diff
From 11c3e695d9a2130f325bb5459a9881ff70338f71 Mon Sep 17 00:00:00 2001
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From: Vojtech Trefny <vtrefny@redhat.com>
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Date: Thu, 9 Mar 2023 13:18:42 +0100
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Subject: [PATCH] Add support for specifying stripe size for RAID LVs
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---
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blivet/devices/lvm.py | 28 +++++++++++++++++---
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tests/storage_tests/devices_test/lvm_test.py | 12 +++++++--
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tests/unit_tests/devices_test/lvm_test.py | 27 +++++++++++++++++++
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3 files changed, 61 insertions(+), 6 deletions(-)
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diff --git a/blivet/devices/lvm.py b/blivet/devices/lvm.py
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index b8595d63..41358e9b 100644
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--- a/blivet/devices/lvm.py
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+++ b/blivet/devices/lvm.py
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@@ -659,7 +659,8 @@ class LVMLogicalVolumeBase(DMDevice, RaidDevice):
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def __init__(self, name, parents=None, size=None, uuid=None, seg_type=None,
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fmt=None, exists=False, sysfs_path='', grow=None, maxsize=None,
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- percent=None, cache_request=None, pvs=None, from_lvs=None):
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+ percent=None, cache_request=None, pvs=None, from_lvs=None,
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+ stripe_size=0):
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if not exists:
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if seg_type not in [None, "linear", "thin", "thin-pool", "cache", "vdo-pool", "vdo", "cache-pool"] + lvm.raid_seg_types:
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@@ -756,6 +757,15 @@ class LVMLogicalVolumeBase(DMDevice, RaidDevice):
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if self._pv_specs:
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self._assign_pv_space()
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+ self._stripe_size = stripe_size
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+ if not self.exists and self._stripe_size:
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+ if self.seg_type not in lvm.raid_seg_types:
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+ raise errors.DeviceError("Stripe size can be specified only for RAID volumes")
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+ if self.seg_type in ("raid1", "RAID1", "1", 1, "mirror"):
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+ raise errors.DeviceError("Specifying stripe size is not allowed for RAID1 or mirror")
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+ if self.cache:
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+ raise errors.DeviceError("Creating cached LVs with custom stripe size is not supported")
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+
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def _assign_pv_space(self):
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if not self.is_raid_lv:
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# nothing to do for non-RAID (and thus non-striped) LVs here
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@@ -2295,7 +2305,7 @@ class LVMLogicalVolumeDevice(LVMLogicalVolumeBase, LVMInternalLogicalVolumeMixin
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parent_lv=None, int_type=None, origin=None, vorigin=False,
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metadata_size=None, chunk_size=None, profile=None, from_lvs=None,
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compression=False, deduplication=False, index_memory=0,
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- write_policy=None, cache_mode=None, attach_to=None):
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+ write_policy=None, cache_mode=None, attach_to=None, stripe_size=0):
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"""
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:param name: the device name (generally a device node's basename)
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:type name: str
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@@ -2375,6 +2385,11 @@ class LVMLogicalVolumeDevice(LVMLogicalVolumeBase, LVMInternalLogicalVolumeMixin
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be attached to when created
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:type attach_to: :class:`LVMLogicalVolumeDevice`
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+ For RAID LVs only:
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+
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+ :keyword stripe_size: size of the RAID stripe
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+ :type stripe_size: :class:`~.size.Size`
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+
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"""
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if isinstance(parents, (list, ParentList)):
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@@ -2395,7 +2410,8 @@ class LVMLogicalVolumeDevice(LVMLogicalVolumeBase, LVMInternalLogicalVolumeMixin
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LVMCachePoolMixin.__init__(self, metadata_size, cache_mode, attach_to)
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LVMLogicalVolumeBase.__init__(self, name, parents, size, uuid, seg_type,
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fmt, exists, sysfs_path, grow, maxsize,
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- percent, cache_request, pvs, from_lvs)
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+ percent, cache_request, pvs, from_lvs,
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+ stripe_size)
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LVMVDOPoolMixin.__init__(self, compression, deduplication, index_memory,
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write_policy)
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LVMVDOLogicalVolumeMixin.__init__(self)
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@@ -2651,8 +2667,12 @@ class LVMLogicalVolumeDevice(LVMLogicalVolumeBase, LVMInternalLogicalVolumeMixin
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pvs = [spec.pv.path for spec in self._pv_specs]
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pvs = pvs or None
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+ extra = dict()
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+ if self._stripe_size:
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+ extra["stripesize"] = str(int(self._stripe_size.convert_to("KiB")))
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+
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blockdev.lvm.lvcreate(self.vg.name, self._name, self.size,
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- type=self.seg_type, pv_list=pvs)
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+ type=self.seg_type, pv_list=pvs, **extra)
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else:
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fast_pvs = [pv.path for pv in self.cache.fast_pvs]
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diff --git a/tests/storage_tests/devices_test/lvm_test.py b/tests/storage_tests/devices_test/lvm_test.py
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index a055fc27..97ef1c4b 100644
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--- a/tests/storage_tests/devices_test/lvm_test.py
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+++ b/tests/storage_tests/devices_test/lvm_test.py
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@@ -1,4 +1,5 @@
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import os
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+import subprocess
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from ..storagetestcase import StorageTestCase
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@@ -127,7 +128,7 @@ class LVMTestCase(StorageTestCase):
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self.assertTrue(snap.is_snapshot_lv)
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self.assertEqual(snap.origin, thinlv)
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- def _test_lvm_raid(self, seg_type, raid_level):
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+ def _test_lvm_raid(self, seg_type, raid_level, stripe_size=0):
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disk1 = self.storage.devicetree.get_device_by_path(self.vdevs[0])
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self.assertIsNotNone(disk1)
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self.storage.initialize_disk(disk1)
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@@ -151,7 +152,7 @@ class LVMTestCase(StorageTestCase):
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raidlv = self.storage.new_lv(fmt_type="ext4", size=blivet.size.Size("50 MiB"),
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parents=[vg], name="blivetTestRAIDLV",
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- seg_type=seg_type, pvs=[pv1, pv2])
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+ seg_type=seg_type, pvs=[pv1, pv2], stripe_size=stripe_size)
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self.storage.create_device(raidlv)
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self.storage.do_it()
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@@ -163,9 +164,16 @@ class LVMTestCase(StorageTestCase):
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self.assertEqual(raidlv.raid_level, raid_level)
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self.assertEqual(raidlv.seg_type, seg_type)
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+ if stripe_size:
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+ out = subprocess.check_output(["lvs", "-o", "stripe_size", "--noheadings", "--nosuffix", "--units=b", raidlv.vg.name + "/" + raidlv.lvname])
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+ self.assertEqual(out.decode().strip(), str(int(stripe_size.convert_to())))
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+
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def test_lvm_raid_raid0(self):
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self._test_lvm_raid("raid0", blivet.devicelibs.raid.RAID0)
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+ def test_lvm_raid_raid0_stripe_size(self):
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+ self._test_lvm_raid("raid0", blivet.devicelibs.raid.RAID0, stripe_size=blivet.size.Size("1 MiB"))
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+
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def test_lvm_raid_striped(self):
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self._test_lvm_raid("striped", blivet.devicelibs.raid.Striped)
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diff --git a/tests/unit_tests/devices_test/lvm_test.py b/tests/unit_tests/devices_test/lvm_test.py
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index 995c2da4..d7b55224 100644
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--- a/tests/unit_tests/devices_test/lvm_test.py
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+++ b/tests/unit_tests/devices_test/lvm_test.py
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@@ -363,6 +363,33 @@ class LVMDeviceTest(unittest.TestCase):
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self.assertEqual(pv.format.free, Size("264 MiB"))
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self.assertEqual(pv2.format.free, Size("256 MiB"))
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+ def test_lvm_logical_volume_raid_stripe_size(self):
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+ pv = StorageDevice("pv1", fmt=blivet.formats.get_format("lvmpv"),
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+ size=Size("1025 MiB"))
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+ pv2 = StorageDevice("pv2", fmt=blivet.formats.get_format("lvmpv"),
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+ size=Size("513 MiB"))
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+ vg = LVMVolumeGroupDevice("testvg", parents=[pv, pv2])
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+
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+ with self.assertRaises(blivet.errors.DeviceError):
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+ # non-raid LV
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+ lv = LVMLogicalVolumeDevice("testlv", parents=[vg], size=Size("1 GiB"),
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+ fmt=blivet.formats.get_format("xfs"),
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+ exists=False, stripe_size=Size("1 MiB"))
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+
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+ with self.assertRaises(blivet.errors.DeviceError):
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+ # raid1 LV
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+ lv = LVMLogicalVolumeDevice("testlv", parents=[vg], size=Size("1 GiB"),
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+ fmt=blivet.formats.get_format("xfs"),
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+ exists=False, seg_type="raid1", pvs=[pv, pv2],
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+ stripe_size=Size("1 MiB"))
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+
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+ lv = LVMLogicalVolumeDevice("testlv", parents=[vg], size=Size("1 GiB"),
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+ fmt=blivet.formats.get_format("xfs"),
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+ exists=False, seg_type="raid0", pvs=[pv, pv2],
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+ stripe_size=Size("1 MiB"))
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+
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+ self.assertEqual(lv._stripe_size, Size("1 MiB"))
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+
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def test_target_size(self):
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pv = StorageDevice("pv1", fmt=blivet.formats.get_format("lvmpv"),
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size=Size("1 GiB"))
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--
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2.40.1
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