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70654f4ef8
a/grub-2.06-x86_64-5.txz: Rebuilt. [PATCH] fs/ext2: Ignore checksum seed incompat feature. Fixes using ext4 with the default options in e2fsprogs-1.47.0. Thanks to USUARIONUEVO. a/shadow-4.13-x86_64-1.txz: Upgraded. ap/squashfs-tools-4.6.1-x86_64-1.txz: Upgraded. l/gsettings-desktop-schemas-44.0-x86_64-1.txz: Upgraded. l/gvfs-1.50.4-x86_64-1.txz: Upgraded. l/libcap-2.68-x86_64-1.txz: Upgraded. x/libva-utils-2.18.1-x86_64-1.txz: Upgraded. xfce/xfce4-screensaver-4.18.1-x86_64-1.txz: Upgraded. testing/packages/rust-1.68.2-x86_64-1.txz: Upgraded.
59 lines
2.6 KiB
Diff
59 lines
2.6 KiB
Diff
From 7fd5feff97c4b1f446f8fcf6d37aca0c64e7c763 Mon Sep 17 00:00:00 2001
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From: Javier Martinez Canillas <javierm@redhat.com>
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Date: Fri, 11 Jun 2021 21:36:16 +0200
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Subject: fs/ext2: Ignore checksum seed incompat feature
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This incompat feature is used to denote that the filesystem stored its
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metadata checksum seed in the superblock. This is used to allow tune2fs
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changing the UUID on a mounted metdata_csum filesystem without having
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to rewrite all the disk metadata. However, the GRUB doesn't use the
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metadata checksum at all. So, it can just ignore this feature if it
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is enabled. This is consistent with the GRUB filesystem code in general
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which just does a best effort to access the filesystem's data.
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The checksum seed incompat feature has to be removed from the ignore
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list if the support for metadata checksum verification is added to the
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GRUB ext2 driver later.
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Suggested-by: Eric Sandeen <esandeen@redhat.com>
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Suggested-by: Lukas Czerner <lczerner@redhat.com>
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Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
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Reviewed-by: Lukas Czerner <lczerner@redhat.com>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/fs/ext2.c | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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diff --git a/grub-core/fs/ext2.c b/grub-core/fs/ext2.c
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index e7dd78e..4953a15 100644
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--- a/grub-core/fs/ext2.c
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+++ b/grub-core/fs/ext2.c
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@@ -103,6 +103,7 @@ GRUB_MOD_LICENSE ("GPLv3+");
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#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
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#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
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#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
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+#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000
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#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000
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/* The set of back-incompatible features this driver DOES support. Add (OR)
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@@ -123,10 +124,15 @@ GRUB_MOD_LICENSE ("GPLv3+");
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* mmp: Not really back-incompatible - was added as such to
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* avoid multiple read-write mounts. Safe to ignore for this
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* RO driver.
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+ * checksum seed: Not really back-incompatible - was added to allow tools
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+ * such as tune2fs to change the UUID on a mounted metadata
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+ * checksummed filesystem. Safe to ignore for now since the
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+ * driver doesn't support checksum verification. However, it
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+ * has to be removed from this list if the support is added later.
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*/
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#define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER \
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- | EXT4_FEATURE_INCOMPAT_MMP)
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-
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+ | EXT4_FEATURE_INCOMPAT_MMP \
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+ | EXT4_FEATURE_INCOMPAT_CSUM_SEED)
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#define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U
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--
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cgit v1.1
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