[U-Boot] [PATCH] ext4: add support for filesystems without JOURNAL
Lukasz Majewski
lukma at denx.de
Mon Jun 24 09:32:25 UTC 2019
On Fri, 21 Jun 2019 15:35:35 +0200
Marek Szyprowski <m.szyprowski at samsung.com> wrote:
> JOURNAL is optional for EXT4 (and EXT3) filesystems, so add support
> for skipping it. This fixes corrupting EXT4 volumes without JOURNAL
> after using uboot's 'ext4write' command.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---
> fs/ext4/ext4_journal.c | 4 ++++
> fs/ext4/ext4_journal.h | 2 ++
> 2 files changed, 6 insertions(+)
>
> diff --git a/fs/ext4/ext4_journal.c b/fs/ext4/ext4_journal.c
> index 6adbab93a68..3559daf11d2 100644
> --- a/fs/ext4/ext4_journal.c
> +++ b/fs/ext4/ext4_journal.c
> @@ -645,6 +645,10 @@ void ext4fs_update_journal(void)
> struct ext_filesystem *fs = get_fs();
> long int blknr;
> int i;
> +
> + if (!(fs->sb->feature_compatibility &
> EXT4_FEATURE_COMPAT_HAS_JOURNAL))
> + return;
> +
> ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO,
> &inode_journal); blknr = read_allocated_block(&inode_journal,
> jrnl_blk_idx++, NULL); update_descriptor_block(blknr);
> diff --git a/fs/ext4/ext4_journal.h b/fs/ext4/ext4_journal.h
> index c9cf195f333..43fb8e76641 100644
> --- a/fs/ext4/ext4_journal.h
> +++ b/fs/ext4/ext4_journal.h
> @@ -17,6 +17,8 @@
> #ifndef __EXT4_JRNL__
> #define __EXT4_JRNL__
>
> +#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004
> +
> #define EXT2_JOURNAL_INO 8 /* Journal inode */
> #define EXT2_JOURNAL_SUPERBLOCK 0 /* Journal
> Superblock number */
Reviewed-by: Lukasz Majewski <lukma at denx.de>
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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