diff options
Diffstat (limited to 'debian/patches/ignore_checksum_seed_incompat_feature.patch')
| -rw-r--r-- | debian/patches/ignore_checksum_seed_incompat_feature.patch | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/debian/patches/ignore_checksum_seed_incompat_feature.patch b/debian/patches/ignore_checksum_seed_incompat_feature.patch new file mode 100644 index 0000000..cd9b897 --- /dev/null +++ b/debian/patches/ignore_checksum_seed_incompat_feature.patch @@ -0,0 +1,54 @@ +commit 7fd5feff97c4b1f446f8fcf6d37aca0c64e7c763 +Author: Javier Martinez Canillas <javierm@redhat.com> +Date: Fri Jun 11 21:36:16 2021 +0200 + + fs/ext2: Ignore checksum seed incompat feature + + This incompat feature is used to denote that the filesystem stored its + metadata checksum seed in the superblock. This is used to allow tune2fs + changing the UUID on a mounted metdata_csum filesystem without having + to rewrite all the disk metadata. However, the GRUB doesn't use the + metadata checksum at all. So, it can just ignore this feature if it + is enabled. This is consistent with the GRUB filesystem code in general + which just does a best effort to access the filesystem's data. + + The checksum seed incompat feature has to be removed from the ignore + list if the support for metadata checksum verification is added to the + GRUB ext2 driver later. + + Suggested-by: Eric Sandeen <esandeen@redhat.com> + Suggested-by: Lukas Czerner <lczerner@redhat.com> + Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> + Reviewed-by: Lukas Czerner <lczerner@redhat.com> + Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> + +diff --git a/grub-core/fs/ext2.c b/grub-core/fs/ext2.c +index e7dd78e66..4953a1591 100644 +--- a/grub-core/fs/ext2.c ++++ b/grub-core/fs/ext2.c +@@ -103,6 +103,7 @@ GRUB_MOD_LICENSE ("GPLv3+"); + #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 + #define EXT4_FEATURE_INCOMPAT_MMP 0x0100 + #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 ++#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 + #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 + + /* The set of back-incompatible features this driver DOES support. Add (OR) +@@ -123,10 +124,15 @@ GRUB_MOD_LICENSE ("GPLv3+"); + * mmp: Not really back-incompatible - was added as such to + * avoid multiple read-write mounts. Safe to ignore for this + * RO driver. ++ * checksum seed: Not really back-incompatible - was added to allow tools ++ * such as tune2fs to change the UUID on a mounted metadata ++ * checksummed filesystem. Safe to ignore for now since the ++ * driver doesn't support checksum verification. However, it ++ * has to be removed from this list if the support is added later. + */ + #define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER \ +- | EXT4_FEATURE_INCOMPAT_MMP) +- ++ | EXT4_FEATURE_INCOMPAT_MMP \ ++ | EXT4_FEATURE_INCOMPAT_CSUM_SEED) + + #define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U + |