BTRFS Support btrload, btrls

[Jonathan Liu]

Hi Ottinger,

Perhaps you can enable CONFIG_CMD_FS_GENERIC=y in your config and try
to use the generic commands - size, load, save, ls, ln, fstype,
fstypes?

Regards,
Jonathan

On Tue, 30 May 2023 at 22:07, Ottinger Georg <g.ottinger at abatec.at> wrote:
>
>
> Hi Everybody,
>
> I am currently evaluating filesystems that can be used reliable on eMMC storage, which support transparent compression.
>
> I see that U-Boot supports btrfs. But I don't understand how to load for example a kernel image from the fs, I was expecting 'btrload' as an analog to 'ext4load' or 'fatload'.
>
> Is there a reason why this commands are not implemented?
>
> When I do patch the file cmd/btfs.c to add 'btrload' I do get a working U-Boot capable of loading DT and kernal image from btrfs.
>
> '''
> char subvolname[1];
>
> int do_btr_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
> {
>
> subvolname[0] = '\0';
>
> return do_load(cmdtp, flag, argc, argv, FS_TYPE_BTRFS);
> }
>
>
> U_BOOT_CMD(
> btrload,        7,      0,      do_btr_fsload,
> "load binary file from a btr filesystem",
> "<interface> [<dev[:part]>]  <addr> <filename>\n"
> "    - Load binary file 'filename' from 'dev' on 'interface'\n"
> "      to address 'addr' from better filesystem.\n"
> "      the load stops on end of file.\n"
> "      All numeric parameters are assumed to be hex."
> );
> '''
>
> Are there any known stability issues, why 'btrload' and 'btrfs' are not included in the current U-Boot?
> Or is there an alternative to 'btrload' to load a kernelimage from fs to ram?
>
> thanks,
> Georg
>
>
> Georg Ottinger
>
> Software Engineer
>
> RESEARCH & DEVELOPMENT
>
> ABATEC GmbH
>
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