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From 2aba050e74dc5df483da022dcf436b101c7a4301 Mon Sep 17 00:00:00 2001
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From: Vojtech Trefny <vtrefny@redhat.com>
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Date: Wed, 11 Jan 2023 14:59:24 +0100
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Subject: [PATCH] Default to encryption sector size 512 for LUKS devices
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We are currently letting cryptsetup decide the optimal encryption
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sector size for LUKS. The problem is that for disks with physical
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sector size 4096 cryptsetup will default to 4096 encryption sector
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size even if the drive logical sector size is 512 which means
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these disks cannot be combined with other 512 logical sector size
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disks in LVM. This requires a more sophisticated solution in the
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future, but for now just default to 512 if not specified by the
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user otherwise.
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Resolves: rhbz#2103800
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---
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blivet/formats/luks.py | 10 +++++++---
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tests/unit_tests/formats_tests/luks_test.py | 2 +-
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2 files changed, 8 insertions(+), 4 deletions(-)
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diff --git a/blivet/formats/luks.py b/blivet/formats/luks.py
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index 8de4911f..2637e0c5 100644
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--- a/blivet/formats/luks.py
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+++ b/blivet/formats/luks.py
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@@ -166,9 +166,13 @@ class LUKS(DeviceFormat):
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if self.pbkdf_args.type == "pbkdf2" and self.pbkdf_args.max_memory_kb:
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log.warning("Memory limit is not used for pbkdf2 and it will be ignored.")
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- self.luks_sector_size = kwargs.get("luks_sector_size") or 0
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- if self.luks_sector_size and self.luks_version != "luks2":
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- raise ValueError("Sector size argument is valid only for LUKS version 2.")
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+ self.luks_sector_size = kwargs.get("luks_sector_size")
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+ if self.luks_version == "luks2":
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+ if self.luks_sector_size is None:
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+ self.luks_sector_size = 512 # XXX we don't want cryptsetup choose automatically here so fallback to 512
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+ else:
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+ if self.luks_sector_size:
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+ raise ValueError("Sector size argument is valid only for LUKS version 2.")
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def __repr__(self):
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s = DeviceFormat.__repr__(self)
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diff --git a/tests/unit_tests/formats_tests/luks_test.py b/tests/unit_tests/formats_tests/luks_test.py
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index 5ae6acfe..ec7b7592 100644
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--- a/tests/unit_tests/formats_tests/luks_test.py
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+++ b/tests/unit_tests/formats_tests/luks_test.py
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@@ -53,7 +53,7 @@ class LUKSNodevTestCase(unittest.TestCase):
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def test_sector_size(self):
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fmt = LUKS()
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- self.assertEqual(fmt.luks_sector_size, 0)
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+ self.assertEqual(fmt.luks_sector_size, 512)
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with self.assertRaises(ValueError):
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fmt = LUKS(luks_version="luks1", luks_sector_size=4096)
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--
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2.39.0
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