[U-Boot] [PATCH V5 0/2] *** Add ext4 filesystem support in uboot ***

[Rob Herring]

On 05/25/2012 10:48 AM, Uma Shankar wrote:
> ***
> This patch series adds support for ext4 ls,load and write features in uboot
> Journaling is supported for write feature.
> 
> To Enable ext2 ls and load commands, modify the board specific config file with
> #define CONFIG_CMD_EXT2
> 
> To Enable ext4 ls and load commands, modify the board specific config file with
> #define CONFIG_CMD_EXT4
> 
> To enable ext4 write command, modify the board specific config file with
> #define CONFIG_CMD_EXT4
> #define CONFIG_CMD_EXT4_WRITE
> 
> Steps to test:
> 
> 1. After applying the patch, ext4 specific commands can be seen
>    in the boot loader prompt using
>         UBOOT #help
> 
>         ext4load- load binary file from a Ext4 file system
>         ext4ls  - list files in a directory (default /)
>         ext4write- create a file in ext4 formatted partition
> 
> 2. To list the files in ext4 formatted partition, execute
>         ext4ls <interface> <dev[:part]> [directory]
>         For example:
>         UBOOT #ext4ls mmc 0:5 /usr/lib
> 
> 3. To read and load a file from an ext4 formatted partition to RAM, execute
>         ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
>         For example:
>         UBOOT #ext4load mmc 2:2 0x30007fc0 uImage
> 
> 4. To write a file to a ext4 formatted partition.
>         a) First load a file to RAM at a particular address for example 0x30007fc0.
>         Now execute ext4write command
>         ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes]
>         For example:
>         UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120
>         (here 6183120 is the size of the file to be written)
>         Note: Absolute path is required for the file to be written
> 
> ***

FYI, in the prior version, I'm seeing some issues with reading
sub-directories on ext4 filesystem. When doing an ls some directories
are present, but have a size of 0 and can't be listed. In Linux, they
are fine.

Rob