From dc1e2fe7783748528cac2f7aa516c89d1959b052 Mon Sep 17 00:00:00 2001
From: Vojtech Trefny <vtrefny@redhat.com>
Date: Thu, 29 Jul 2021 14:44:22 +0200
Subject: [PATCH] Do not set chunk size for RAID 1
Setting chunk size for RAID 1 doesn't make sense and latest
mdadm started returning error instead of ignoring the --chunk
option when creating an array.
Resolves: rhbz#1987170
---
blivet/devicelibs/raid.py | 12 ++++++++++
blivet/devices/md.py | 15 ++++++++++---
tests/devices_test/md_test.py | 41 +++++++++++++++++++++++++++++++++--
3 files changed, 63 insertions(+), 5 deletions(-)
diff --git a/blivet/devicelibs/raid.py b/blivet/devicelibs/raid.py
index 19c3fae98..a9e241c7a 100644
--- a/blivet/devicelibs/raid.py
+++ b/blivet/devicelibs/raid.py
@@ -462,6 +462,18 @@ def _pad(self, size, chunk_size):
def _get_recommended_stride(self, member_count):
return None
+ def get_size(self, member_sizes, num_members=None, chunk_size=None, superblock_size_func=None):
+ if not member_sizes:
+ return Size(0)
+
+ if num_members is None:
+ num_members = len(member_sizes)
+
+ min_size = min(member_sizes)
+ superblock_size = superblock_size_func(min_size)
+ min_data_size = self._trim(min_size - superblock_size, chunk_size)
+ return self.get_net_array_size(num_members, min_data_size)
+
RAID1 = RAID1()
ALL_LEVELS.add_raid_level(RAID1)
diff --git a/blivet/devices/md.py b/blivet/devices/md.py
index 69eee93a5..d1a2faf1f 100644
--- a/blivet/devices/md.py
+++ b/blivet/devices/md.py
@@ -138,7 +138,7 @@ def __init__(self, name, level=None, major=None, minor=None, size=None,
if self.exists:
self._chunk_size = self.read_chunk_size()
else:
- self._chunk_size = chunk_size or mdraid.MD_CHUNK_SIZE
+ self.chunk_size = chunk_size or Size(0)
if not self.exists and not isinstance(metadata_version, str):
self.metadata_version = "default"
@@ -208,8 +208,14 @@ def sector_size(self):
@property
def chunk_size(self):
- if self.exists and self._chunk_size == Size(0):
- self._chunk_size = self.read_chunk_size()
+ if self._chunk_size == Size(0):
+ if self.exists:
+ return self.read_chunk_size()
+ else:
+ if self.level == raid.RAID1:
+ return self._chunk_size
+ else:
+ return mdraid.MD_CHUNK_SIZE
return self._chunk_size
@chunk_size.setter
@@ -223,6 +229,9 @@ def chunk_size(self, newsize):
if self.exists:
raise ValueError("cannot set chunk size for an existing device")
+ if self.level == raid.RAID1 and newsize != Size(0):
+ raise ValueError("specifying chunk size is not allowed for raid1")
+
self._chunk_size = newsize
def read_chunk_size(self):
diff --git a/tests/devices_test/md_test.py b/tests/devices_test/md_test.py
index 46df76d3d..47a0fa0cc 100644
--- a/tests/devices_test/md_test.py
+++ b/tests/devices_test/md_test.py
@@ -1,6 +1,11 @@
import six
import unittest
+try:
+ from unittest.mock import patch
+except ImportError:
+ from mock import patch
+
import blivet
from blivet.devices import StorageDevice
@@ -27,9 +32,27 @@ def test_chunk_size1(self):
raid_array = MDRaidArrayDevice(name="raid", level="raid0", member_devices=2,
total_devices=2, parents=[member1, member2])
- # no chunk_size specified -- default value
+ # no chunk_size specified and RAID0 -- default value
self.assertEqual(raid_array.chunk_size, mdraid.MD_CHUNK_SIZE)
+ with patch("blivet.devices.md.blockdev.md.create") as md_create:
+ raid_array._create()
+ md_create.assert_called_with("/dev/md/raid", "raid0", ["/dev/member1", "/dev/member2"],
+ 0, version="default", bitmap=False,
+ chunk_size=mdraid.MD_CHUNK_SIZE)
+
+ raid_array = MDRaidArrayDevice(name="raid", level="raid1", member_devices=2,
+ total_devices=2, parents=[member1, member2])
+
+ # no chunk_size specified and RAID1 -- no chunk size set (0)
+ self.assertEqual(raid_array.chunk_size, Size(0))
+
+ with patch("blivet.devices.md.blockdev.md.create") as md_create:
+ raid_array._create()
+ md_create.assert_called_with("/dev/md/raid", "raid1", ["/dev/member1", "/dev/member2"],
+ 0, version="default", bitmap=True,
+ chunk_size=0)
+
def test_chunk_size2(self):
member1 = StorageDevice("member1", fmt=blivet.formats.get_format("mdmember"),
@@ -40,11 +63,25 @@ def test_chunk_size2(self):
raid_array = MDRaidArrayDevice(name="raid", level="raid0", member_devices=2,
total_devices=2, parents=[member1, member2],
chunk_size=Size("1024 KiB"))
-
self.assertEqual(raid_array.chunk_size, Size("1024 KiB"))
+ # for raid0 setting chunk_size = 0 means "default"
+ raid_array.chunk_size = Size(0)
+ self.assertEqual(raid_array.chunk_size, mdraid.MD_CHUNK_SIZE)
+
with six.assertRaisesRegex(self, ValueError, "new chunk size must be of type Size"):
raid_array.chunk_size = 1
with six.assertRaisesRegex(self, ValueError, "new chunk size must be multiple of 4 KiB"):
raid_array.chunk_size = Size("5 KiB")
+
+ with six.assertRaisesRegex(self, ValueError, "specifying chunk size is not allowed for raid1"):
+ MDRaidArrayDevice(name="raid", level="raid1", member_devices=2,
+ total_devices=2, parents=[member1, member2],
+ chunk_size=Size("1024 KiB"))
+
+ raid_array = MDRaidArrayDevice(name="raid", level="raid1", member_devices=2,
+ total_devices=2, parents=[member1, member2])
+
+ with six.assertRaisesRegex(self, ValueError, "specifying chunk size is not allowed for raid1"):
+ raid_array.chunk_size = Size("512 KiB")