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qemu-kvm/kvm-iotests-Test-node-bitmap-aliases-during-migration.patch
Danilo C. L. de Paula e5fba7f9b3 * Thu Aug 27 2020 Danilo Cesar Lemes de Paula <ddepaula@redhat.com> - 5.1.0-4.el8 
- kvm-Drop-bogus-IPv6-messages.patch [bz#1867075]
- kvm-machine-types-numa-set-numa_mem_supported-on-old-mac.patch [bz#1849707]
- kvm-machine_types-numa-compatibility-for-auto_enable_num.patch [bz#1849707]
- kvm-migration-Add-block-bitmap-mapping-parameter.patch [bz#1790492]
- kvm-iotests.py-Let-wait_migration-return-on-failure.patch [bz#1790492]
- kvm-iotests-Test-node-bitmap-aliases-during-migration.patch [bz#1790492]
- Resolves: bz#1790492
  ('dirty-bitmaps' migration capability should allow configuring target nodenames)
- Resolves: bz#1849707
  (8.3 machine types for x86 - 5.1 update)
- Resolves: bz#1867075
  (CVE-2020-10756 virt:8.3/qemu-kvm: QEMU: slirp: networking out-of-bounds read information disclosure vulnerability [rhel-av-8])
2020-08-27 14:28:38 -04:00

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From 2877fd4f92a86f43a113691f56738b09a0b4d500 Mon Sep 17 00:00:00 2001
From: Max Reitz <mreitz@redhat.com>
Date: Mon, 24 Aug 2020 09:20:38 -0400
Subject: [PATCH 6/6] iotests: Test node/bitmap aliases during migration
RH-Author: Max Reitz <mreitz@redhat.com>
Message-id: <20200824092038.227913-4-mreitz@redhat.com>
Patchwork-id: 98214
O-Subject: [RHEL-AV-8.3.0 qemu-kvm PATCH 3/3] iotests: Test node/bitmap aliases during migration
Bugzilla: 1790492
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200820150725.68687-4-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
[eblake: fold in python cleanups recommended by Vladimir]
Signed-off-by: Eric Blake <eblake@redhat.com>
(cherry picked from commit cb5c6cd2dc984812f560fbe41f57a6bfc34d8708)
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
tests/qemu-iotests/300 | 593 +++++++++++++++++++++++++++++++++++++
tests/qemu-iotests/300.out | 5 +
tests/qemu-iotests/group | 1 +
3 files changed, 599 insertions(+)
create mode 100755 tests/qemu-iotests/300
create mode 100644 tests/qemu-iotests/300.out
diff --git a/tests/qemu-iotests/300 b/tests/qemu-iotests/300
new file mode 100755
index 0000000000..5b75121b84
--- /dev/null
+++ b/tests/qemu-iotests/300
@@ -0,0 +1,593 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 Red Hat, Inc.
+#
+# Tests for dirty bitmaps migration with node aliases
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+import os
+import random
+import re
+from typing import Dict, List, Optional, Union
+import iotests
+import qemu
+
+BlockBitmapMapping = List[Dict[str, Union[str, List[Dict[str, str]]]]]
+
+assert iotests.sock_dir is not None
+mig_sock = os.path.join(iotests.sock_dir, 'mig_sock')
+
+
+class TestDirtyBitmapMigration(iotests.QMPTestCase):
+ src_node_name: str = ''
+ dst_node_name: str = ''
+ src_bmap_name: str = ''
+ dst_bmap_name: str = ''
+
+ def setUp(self) -> None:
+ self.vm_a = iotests.VM(path_suffix='-a')
+ self.vm_a.add_blockdev(f'node-name={self.src_node_name},'
+ 'driver=null-co')
+ self.vm_a.launch()
+
+ self.vm_b = iotests.VM(path_suffix='-b')
+ self.vm_b.add_blockdev(f'node-name={self.dst_node_name},'
+ 'driver=null-co')
+ self.vm_b.add_incoming(f'unix:{mig_sock}')
+ self.vm_b.launch()
+
+ result = self.vm_a.qmp('block-dirty-bitmap-add',
+ node=self.src_node_name,
+ name=self.src_bmap_name)
+ self.assert_qmp(result, 'return', {})
+
+ # Dirty some random megabytes
+ for _ in range(9):
+ mb_ofs = random.randrange(1024)
+ self.vm_a.hmp_qemu_io(self.src_node_name, f'discard {mb_ofs}M 1M')
+
+ result = self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256',
+ node=self.src_node_name,
+ name=self.src_bmap_name)
+ self.bitmap_hash_reference = result['return']['sha256']
+
+ caps = [{'capability': name, 'state': True}
+ for name in ('dirty-bitmaps', 'events')]
+
+ for vm in (self.vm_a, self.vm_b):
+ result = vm.qmp('migrate-set-capabilities', capabilities=caps)
+ self.assert_qmp(result, 'return', {})
+
+ def tearDown(self) -> None:
+ self.vm_a.shutdown()
+ self.vm_b.shutdown()
+ try:
+ os.remove(mig_sock)
+ except OSError:
+ pass
+
+ def check_bitmap(self, bitmap_name_valid: bool) -> None:
+ result = self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256',
+ node=self.dst_node_name,
+ name=self.dst_bmap_name)
+ if bitmap_name_valid:
+ self.assert_qmp(result, 'return/sha256',
+ self.bitmap_hash_reference)
+ else:
+ self.assert_qmp(result, 'error/desc',
+ f"Dirty bitmap '{self.dst_bmap_name}' not found")
+
+ def migrate(self, bitmap_name_valid: bool = True,
+ migration_success: bool = True) -> None:
+ result = self.vm_a.qmp('migrate', uri=f'unix:{mig_sock}')
+ self.assert_qmp(result, 'return', {})
+
+ with iotests.Timeout(5, 'Timeout waiting for migration to complete'):
+ self.assertEqual(self.vm_a.wait_migration('postmigrate'),
+ migration_success)
+ self.assertEqual(self.vm_b.wait_migration('running'),
+ migration_success)
+
+ if migration_success:
+ self.check_bitmap(bitmap_name_valid)
+
+ def verify_dest_error(self, msg: Optional[str]) -> None:
+ """
+ Check whether the given error message is present in vm_b's log.
+ (vm_b is shut down to do so.)
+ If @msg is None, check that there has not been any error.
+ """
+ self.vm_b.shutdown()
+ if msg is None:
+ self.assertNotIn('qemu-system-', self.vm_b.get_log())
+ else:
+ self.assertIn(msg, self.vm_b.get_log())
+
+ @staticmethod
+ def mapping(node_name: str, node_alias: str,
+ bitmap_name: str, bitmap_alias: str) -> BlockBitmapMapping:
+ return [{
+ 'node-name': node_name,
+ 'alias': node_alias,
+ 'bitmaps': [{
+ 'name': bitmap_name,
+ 'alias': bitmap_alias
+ }]
+ }]
+
+ def set_mapping(self, vm: iotests.VM, mapping: BlockBitmapMapping,
+ error: Optional[str] = None) -> None:
+ """
+ Invoke migrate-set-parameters on @vm to set the given @mapping.
+ Check for success if @error is None, or verify the error message
+ if it is not.
+ On success, verify that "info migrate_parameters" on HMP returns
+ our mapping. (Just to check its formatting code.)
+ """
+ result = vm.qmp('migrate-set-parameters',
+ block_bitmap_mapping=mapping)
+
+ if error is None:
+ self.assert_qmp(result, 'return', {})
+
+ result = vm.qmp('human-monitor-command',
+ command_line='info migrate_parameters')
+
+ m = re.search(r'^block-bitmap-mapping:\r?(\n .*)*\n',
+ result['return'], flags=re.MULTILINE)
+ hmp_mapping = m.group(0).replace('\r', '') if m else None
+
+ self.assertEqual(hmp_mapping, self.to_hmp_mapping(mapping))
+ else:
+ self.assert_qmp(result, 'error/desc', error)
+
+ @staticmethod
+ def to_hmp_mapping(mapping: BlockBitmapMapping) -> str:
+ result = 'block-bitmap-mapping:\n'
+
+ for node in mapping:
+ result += f" '{node['node-name']}' -> '{node['alias']}'\n"
+
+ assert isinstance(node['bitmaps'], list)
+ for bitmap in node['bitmaps']:
+ result += f" '{bitmap['name']}' -> '{bitmap['alias']}'\n"
+
+ return result
+
+
+class TestAliasMigration(TestDirtyBitmapMigration):
+ src_node_name = 'node0'
+ dst_node_name = 'node0'
+ src_bmap_name = 'bmap0'
+ dst_bmap_name = 'bmap0'
+
+ def test_migration_without_alias(self) -> None:
+ self.migrate(self.src_node_name == self.dst_node_name and
+ self.src_bmap_name == self.dst_bmap_name)
+
+ # Check for error message on the destination
+ if self.src_node_name != self.dst_node_name:
+ self.verify_dest_error(f"Cannot find "
+ f"device={self.src_node_name} nor "
+ f"node_name={self.src_node_name}")
+ else:
+ self.verify_dest_error(None)
+
+ def test_alias_on_src_migration(self) -> None:
+ mapping = self.mapping(self.src_node_name, self.dst_node_name,
+ self.src_bmap_name, self.dst_bmap_name)
+
+ self.set_mapping(self.vm_a, mapping)
+ self.migrate()
+ self.verify_dest_error(None)
+
+ def test_alias_on_dst_migration(self) -> None:
+ mapping = self.mapping(self.dst_node_name, self.src_node_name,
+ self.dst_bmap_name, self.src_bmap_name)
+
+ self.set_mapping(self.vm_b, mapping)
+ self.migrate()
+ self.verify_dest_error(None)
+
+ def test_alias_on_both_migration(self) -> None:
+ src_map = self.mapping(self.src_node_name, 'node-alias',
+ self.src_bmap_name, 'bmap-alias')
+
+ dst_map = self.mapping(self.dst_node_name, 'node-alias',
+ self.dst_bmap_name, 'bmap-alias')
+
+ self.set_mapping(self.vm_a, src_map)
+ self.set_mapping(self.vm_b, dst_map)
+ self.migrate()
+ self.verify_dest_error(None)
+
+
+class TestNodeAliasMigration(TestAliasMigration):
+ src_node_name = 'node-src'
+ dst_node_name = 'node-dst'
+
+
+class TestBitmapAliasMigration(TestAliasMigration):
+ src_bmap_name = 'bmap-src'
+ dst_bmap_name = 'bmap-dst'
+
+
+class TestFullAliasMigration(TestAliasMigration):
+ src_node_name = 'node-src'
+ dst_node_name = 'node-dst'
+ src_bmap_name = 'bmap-src'
+ dst_bmap_name = 'bmap-dst'
+
+
+class TestLongBitmapNames(TestAliasMigration):
+ # Giving long bitmap names is OK, as long as there is a short alias for
+ # migration
+ src_bmap_name = 'a' * 512
+ dst_bmap_name = 'b' * 512
+
+ # Skip all tests that do not use the intermediate alias
+ def test_migration_without_alias(self) -> None:
+ pass
+
+ def test_alias_on_src_migration(self) -> None:
+ pass
+
+ def test_alias_on_dst_migration(self) -> None:
+ pass
+
+
+class TestBlockBitmapMappingErrors(TestDirtyBitmapMigration):
+ src_node_name = 'node0'
+ dst_node_name = 'node0'
+ src_bmap_name = 'bmap0'
+ dst_bmap_name = 'bmap0'
+
+ """
+ Note that mapping nodes or bitmaps that do not exist is not an error.
+ """
+
+ def test_non_injective_node_mapping(self) -> None:
+ mapping: BlockBitmapMapping = [
+ {
+ 'node-name': 'node0',
+ 'alias': 'common-alias',
+ 'bitmaps': [{
+ 'name': 'bmap0',
+ 'alias': 'bmap-alias0'
+ }]
+ },
+ {
+ 'node-name': 'node1',
+ 'alias': 'common-alias',
+ 'bitmaps': [{
+ 'name': 'bmap1',
+ 'alias': 'bmap-alias1'
+ }]
+ }
+ ]
+
+ self.set_mapping(self.vm_a, mapping,
+ "Invalid mapping given for block-bitmap-mapping: "
+ "The node alias 'common-alias' is used twice")
+
+ def test_non_injective_bitmap_mapping(self) -> None:
+ mapping: BlockBitmapMapping = [{
+ 'node-name': 'node0',
+ 'alias': 'node-alias0',
+ 'bitmaps': [
+ {
+ 'name': 'bmap0',
+ 'alias': 'common-alias'
+ },
+ {
+ 'name': 'bmap1',
+ 'alias': 'common-alias'
+ }
+ ]
+ }]
+
+ self.set_mapping(self.vm_a, mapping,
+ "Invalid mapping given for block-bitmap-mapping: "
+ "The bitmap alias 'node-alias0'/'common-alias' is "
+ "used twice")
+
+ def test_ambiguous_node_mapping(self) -> None:
+ mapping: BlockBitmapMapping = [
+ {
+ 'node-name': 'node0',
+ 'alias': 'node-alias0',
+ 'bitmaps': [{
+ 'name': 'bmap0',
+ 'alias': 'bmap-alias0'
+ }]
+ },
+ {
+ 'node-name': 'node0',
+ 'alias': 'node-alias1',
+ 'bitmaps': [{
+ 'name': 'bmap0',
+ 'alias': 'bmap-alias0'
+ }]
+ }
+ ]
+
+ self.set_mapping(self.vm_a, mapping,
+ "Invalid mapping given for block-bitmap-mapping: "
+ "The node name 'node0' is mapped twice")
+
+ def test_ambiguous_bitmap_mapping(self) -> None:
+ mapping: BlockBitmapMapping = [{
+ 'node-name': 'node0',
+ 'alias': 'node-alias0',
+ 'bitmaps': [
+ {
+ 'name': 'bmap0',
+ 'alias': 'bmap-alias0'
+ },
+ {
+ 'name': 'bmap0',
+ 'alias': 'bmap-alias1'
+ }
+ ]
+ }]
+
+ self.set_mapping(self.vm_a, mapping,
+ "Invalid mapping given for block-bitmap-mapping: "
+ "The bitmap 'node0'/'bmap0' is mapped twice")
+
+ def test_migratee_node_is_not_mapped_on_src(self) -> None:
+ self.set_mapping(self.vm_a, [])
+ # Should just ignore all bitmaps on unmapped nodes
+ self.migrate(False)
+ self.verify_dest_error(None)
+
+ def test_migratee_node_is_not_mapped_on_dst(self) -> None:
+ self.set_mapping(self.vm_b, [])
+ self.migrate(False)
+ self.verify_dest_error(f"Unknown node alias '{self.src_node_name}'")
+
+ def test_migratee_bitmap_is_not_mapped_on_src(self) -> None:
+ mapping: BlockBitmapMapping = [{
+ 'node-name': self.src_node_name,
+ 'alias': self.dst_node_name,
+ 'bitmaps': []
+ }]
+
+ self.set_mapping(self.vm_a, mapping)
+ # Should just ignore all unmapped bitmaps
+ self.migrate(False)
+ self.verify_dest_error(None)
+
+ def test_migratee_bitmap_is_not_mapped_on_dst(self) -> None:
+ mapping: BlockBitmapMapping = [{
+ 'node-name': self.dst_node_name,
+ 'alias': self.src_node_name,
+ 'bitmaps': []
+ }]
+
+ self.set_mapping(self.vm_b, mapping)
+ self.migrate(False)
+ self.verify_dest_error(f"Unknown bitmap alias "
+ f"'{self.src_bmap_name}' "
+ f"on node '{self.dst_node_name}' "
+ f"(alias '{self.src_node_name}')")
+
+ def test_unused_mapping_on_dst(self) -> None:
+ # Let the source not send any bitmaps
+ self.set_mapping(self.vm_a, [])
+
+ # Establish some mapping on the destination
+ self.set_mapping(self.vm_b, [])
+
+ # The fact that there is a mapping on B without any bitmaps
+ # being received should be fine, not fatal
+ self.migrate(False)
+ self.verify_dest_error(None)
+
+ def test_non_wellformed_node_alias(self) -> None:
+ alias = '123-foo'
+
+ mapping: BlockBitmapMapping = [{
+ 'node-name': self.src_node_name,
+ 'alias': alias,
+ 'bitmaps': []
+ }]
+
+ self.set_mapping(self.vm_a, mapping,
+ f"Invalid mapping given for block-bitmap-mapping: "
+ f"The node alias '{alias}' is not well-formed")
+
+ def test_node_alias_too_long(self) -> None:
+ alias = 'a' * 256
+
+ mapping: BlockBitmapMapping = [{
+ 'node-name': self.src_node_name,
+ 'alias': alias,
+ 'bitmaps': []
+ }]
+
+ self.set_mapping(self.vm_a, mapping,
+ f"Invalid mapping given for block-bitmap-mapping: "
+ f"The node alias '{alias}' is longer than 255 bytes")
+
+ def test_bitmap_alias_too_long(self) -> None:
+ alias = 'a' * 256
+
+ mapping = self.mapping(self.src_node_name, self.dst_node_name,
+ self.src_bmap_name, alias)
+
+ self.set_mapping(self.vm_a, mapping,
+ f"Invalid mapping given for block-bitmap-mapping: "
+ f"The bitmap alias '{alias}' is longer than 255 "
+ f"bytes")
+
+ def test_bitmap_name_too_long(self) -> None:
+ name = 'a' * 256
+
+ result = self.vm_a.qmp('block-dirty-bitmap-add',
+ node=self.src_node_name,
+ name=name)
+ self.assert_qmp(result, 'return', {})
+
+ self.migrate(False, False)
+
+ # Check for the error in the source's log
+ self.vm_a.shutdown()
+ self.assertIn(f"Cannot migrate bitmap '{name}' on node "
+ f"'{self.src_node_name}': Name is longer than 255 bytes",
+ self.vm_a.get_log())
+
+ # Expect abnormal shutdown of the destination VM because of
+ # the failed migration
+ try:
+ self.vm_b.shutdown()
+ except qemu.machine.AbnormalShutdown:
+ pass
+
+ def test_aliased_bitmap_name_too_long(self) -> None:
+ # Longer than the maximum for bitmap names
+ self.dst_bmap_name = 'a' * 1024
+
+ mapping = self.mapping(self.dst_node_name, self.src_node_name,
+ self.dst_bmap_name, self.src_bmap_name)
+
+ # We would have to create this bitmap during migration, and
+ # that would fail, because the name is too long. Better to
+ # catch it early.
+ self.set_mapping(self.vm_b, mapping,
+ f"Invalid mapping given for block-bitmap-mapping: "
+ f"The bitmap name '{self.dst_bmap_name}' is longer "
+ f"than 1023 bytes")
+
+ def test_node_name_too_long(self) -> None:
+ # Longer than the maximum for node names
+ self.dst_node_name = 'a' * 32
+
+ mapping = self.mapping(self.dst_node_name, self.src_node_name,
+ self.dst_bmap_name, self.src_bmap_name)
+
+ # During migration, this would appear simply as a node that
+ # cannot be found. Still better to catch impossible node
+ # names early (similar to test_non_wellformed_node_alias).
+ self.set_mapping(self.vm_b, mapping,
+ f"Invalid mapping given for block-bitmap-mapping: "
+ f"The node name '{self.dst_node_name}' is longer "
+ f"than 31 bytes")
+
+
+class TestCrossAliasMigration(TestDirtyBitmapMigration):
+ """
+ Swap aliases, both to see that qemu does not get confused, and
+ that we can migrate multiple things at once.
+
+ So we migrate this:
+ node-a.bmap-a -> node-b.bmap-b
+ node-a.bmap-b -> node-b.bmap-a
+ node-b.bmap-a -> node-a.bmap-b
+ node-b.bmap-b -> node-a.bmap-a
+ """
+
+ src_node_name = 'node-a'
+ dst_node_name = 'node-b'
+ src_bmap_name = 'bmap-a'
+ dst_bmap_name = 'bmap-b'
+
+ def setUp(self) -> None:
+ TestDirtyBitmapMigration.setUp(self)
+
+ # Now create another block device and let both have two bitmaps each
+ result = self.vm_a.qmp('blockdev-add',
+ node_name='node-b', driver='null-co')
+ self.assert_qmp(result, 'return', {})
+
+ result = self.vm_b.qmp('blockdev-add',
+ node_name='node-a', driver='null-co')
+ self.assert_qmp(result, 'return', {})
+
+ bmaps_to_add = (('node-a', 'bmap-b'),
+ ('node-b', 'bmap-a'),
+ ('node-b', 'bmap-b'))
+
+ for (node, bmap) in bmaps_to_add:
+ result = self.vm_a.qmp('block-dirty-bitmap-add',
+ node=node, name=bmap)
+ self.assert_qmp(result, 'return', {})
+
+ @staticmethod
+ def cross_mapping() -> BlockBitmapMapping:
+ return [
+ {
+ 'node-name': 'node-a',
+ 'alias': 'node-b',
+ 'bitmaps': [
+ {
+ 'name': 'bmap-a',
+ 'alias': 'bmap-b'
+ },
+ {
+ 'name': 'bmap-b',
+ 'alias': 'bmap-a'
+ }
+ ]
+ },
+ {
+ 'node-name': 'node-b',
+ 'alias': 'node-a',
+ 'bitmaps': [
+ {
+ 'name': 'bmap-b',
+ 'alias': 'bmap-a'
+ },
+ {
+ 'name': 'bmap-a',
+ 'alias': 'bmap-b'
+ }
+ ]
+ }
+ ]
+
+ def verify_dest_has_all_bitmaps(self) -> None:
+ bitmaps = self.vm_b.query_bitmaps()
+
+ # Extract and sort bitmap names
+ for node in bitmaps:
+ bitmaps[node] = sorted((bmap['name'] for bmap in bitmaps[node]))
+
+ self.assertEqual(bitmaps,
+ {'node-a': ['bmap-a', 'bmap-b'],
+ 'node-b': ['bmap-a', 'bmap-b']})
+
+ def test_alias_on_src(self) -> None:
+ self.set_mapping(self.vm_a, self.cross_mapping())
+
+ # Checks that node-a.bmap-a was migrated to node-b.bmap-b, and
+ # that is enough
+ self.migrate()
+ self.verify_dest_has_all_bitmaps()
+ self.verify_dest_error(None)
+
+ def test_alias_on_dst(self) -> None:
+ self.set_mapping(self.vm_b, self.cross_mapping())
+
+ # Checks that node-a.bmap-a was migrated to node-b.bmap-b, and
+ # that is enough
+ self.migrate()
+ self.verify_dest_has_all_bitmaps()
+ self.verify_dest_error(None)
+
+
+if __name__ == '__main__':
+ iotests.main(supported_protocols=['file'])
diff --git a/tests/qemu-iotests/300.out b/tests/qemu-iotests/300.out
new file mode 100644
index 0000000000..cafb8161f7
--- /dev/null
+++ b/tests/qemu-iotests/300.out
@@ -0,0 +1,5 @@
+.....................................
+----------------------------------------------------------------------
+Ran 37 tests
+
+OK
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 025ed5238d..b0b55e241c 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -307,5 +307,6 @@
296 rw
297 meta
299 auto quick
+300 migration
301 backing quick
302 quick
--
2.27.0
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