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Support ext4 fs with checksum seed feature.

This commit is contained in:
longpanda 2024-05-19 12:14:02 +08:00
parent 712f10e86a
commit d672af4819
1 changed files with 14 additions and 5 deletions
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19
GRUB2/MOD_SRC/grub-2.04/grub-core/fs/ext2.c
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@ -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
@ -723,10 +731,11 @@ grub_ext2_read_symlink (grub_fshelp_node_t node)
if (! symlink)
return 0;
/* If the filesize of the symlink is bigger than
60 the symlink is stored in a separate block,
otherwise it is stored in the inode. */
if (grub_le_to_cpu32 (diro->inode.size) <= sizeof (diro->inode.symlink))
/*
* If the filesize of the symlink is equal to or bigger than 60 the symlink
* is stored in a separate block, otherwise it is stored in the inode.
*/
if (grub_le_to_cpu32 (diro->inode.size) < sizeof (diro->inode.symlink))
grub_memcpy (symlink,
diro->inode.symlink,
grub_le_to_cpu32 (diro->inode.size));