You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
2.4 KiB
54 lines
2.4 KiB
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
|
From: Javier Martinez Canillas <javierm@redhat.com> |
|
Date: Fri, 11 Jun 2021 00:01:29 +0200 |
|
Subject: [PATCH] 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 |
|
to change the UUID on a mounted metadata_csum filesystem without having |
|
to rewrite all the disk metadata. |
|
|
|
But GRUB doesn't use the metadata checksum in anyway, so can just ignore |
|
this feature if is enabled. This is consistent with GRUB filesystem code |
|
in general which just does a best effort to access the filesystem's data. |
|
|
|
It may be removed from the ignored list in the future if supports to do |
|
metadata checksumming verification is added to the read-only FS driver. |
|
|
|
Suggested-by: Eric Sandeen <esandeen@redhat.com> |
|
Suggested-by: Lukas Czerner <lczerner@redhat.com> |
|
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> |
|
--- |
|
grub-core/fs/ext2.c | 10 +++++++++- |
|
1 file changed, 9 insertions(+), 1 deletion(-) |
|
|
|
diff --git a/grub-core/fs/ext2.c b/grub-core/fs/ext2.c |
|
index e7dd78e6635..731d346f886 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) |
|
@@ -123,9 +124,16 @@ 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. But it must |
|
+ * be removed from this list if that 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
|
|
|