[U-Boot] [PATCH] ext4: fix calculating inode blkcount for non-512 blocksize filesystems

[Lukasz Majewski <lukma@denx.de>]

On Fri, 21 Jun 2019 15:32:51 +0200
Marek Szyprowski <m.szyprowski@samsung.com> wrote:

> The block count entry in the EXT4 filesystem disk structures uses
> standard 512-bytes units for most of the typical files. The only
> exception are HUGE files, which use the filesystem block size, but
> those are not supported by uboot's EXT4 implementation anyway. This
> patch fixes the EXT4 code to use proper unit count for inode block
> count. This fixes errors reported by fsck.ext4 on disks with
> non-standard (i.e. 4KiB, in case of new flash drives) PHYSICAL block
> size after using 'ext4write' uboot's command.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>  fs/ext4/ext4_common.c | 2 +-
>  fs/ext4/ext4_write.c  | 2 +-
>  include/ext_common.h  | 1 +
>  3 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
> index 464c33d0d74..8a142e2e6a1 100644
> --- a/fs/ext4/ext4_common.c
> +++ b/fs/ext4/ext4_common.c
> @@ -570,7 +570,7 @@ restart_read:
>  				g_parent_inode->size =
> cpu_to_le32(new_size); 
>  				new_blockcnt =
> le32_to_cpu(g_parent_inode->blockcnt);
> -				new_blockcnt += fs->sect_perblk;
> +				new_blockcnt += fs->blksz >>
> LOG2_SECTOR_SIZE; g_parent_inode->blockcnt =
> cpu_to_le32(new_blockcnt); 
>  				if (ext4fs_put_metadata
> diff --git a/fs/ext4/ext4_write.c b/fs/ext4/ext4_write.c
> index 504d23a8956..3368bd8c005 100644
> --- a/fs/ext4/ext4_write.c
> +++ b/fs/ext4/ext4_write.c
> @@ -957,7 +957,7 @@ int ext4fs_write(const char *fname, const char
> *buffer, ext4fs_allocate_blocks(file_inode, blocks_remaining,
>  			       &blks_reqd_for_file);
>  	file_inode->blockcnt = cpu_to_le32((blks_reqd_for_file *
> fs->blksz) >>
> -		fs->dev_desc->log2blksz);
> +					   LOG2_SECTOR_SIZE);
>  
>  	temp_ptr = zalloc(fs->blksz);
>  	if (!temp_ptr)
> diff --git a/include/ext_common.h b/include/ext_common.h
> index 17c92f1750b..1c10c504748 100644
> --- a/include/ext_common.h
> +++ b/include/ext_common.h
> @@ -21,6 +21,7 @@
>  #define __EXT_COMMON__
>  #include <command.h>
>  #define SECTOR_SIZE		0x200
> +#define LOG2_SECTOR_SIZE	9
>  
>  /* Magic value used to identify an ext2 filesystem.  */
>  #define	EXT2_MAGIC			0xEF53

Reviewed-by: Lukasz Majewski <lukma@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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