On 2016-10-21 09:15, Andre Valentin wrote:
> Hi Felix!
>
> Am 19.10.2016 um 21:43 schrieb Felix Fietkau:
>>>>> thanks for your comments. Please take a look:
>>>>>
>>>>> Am 18.10.2016 um 08:22 schrieb John Crispin:
>>>>>
>>>>>>> +++ b/target/linux/ipq806x/base-files/lib/preinit/04_set_mtd_ipq806x.sh
>>>>>>> @@ -0,0 +1,21 @@
>>>>>>> +#
>>>>>>> +# Copyright (C) 2009 OpenWrt.org
>>>>>>> +#
>>>>>>> +
>>>>>>> +. /lib/ipq806x.sh
>>>>>>> +. /lib/functions/system.sh
>>>>>>> +
>>>>>>> +preinit_assign_mtd2block() {
>>>>>>> + case $(ipq806x_board_name) in
>>>>>>> + nbg6817)
>>>>>>> + echo "/dev/mmcblk0p2,64KiB,romd" >
>>>>>>> /sys/module/block2mtd/parameters/block2mtd
>>>>>>> + echo "/dev/mmcblk0p3,64KiB,header" >
>>>>>>> /sys/module/block2mtd/parameters/block2mtd
>>>>>>> + echo "/dev/mmcblk0p4,64KiB,kernel" >
>>>>>>> /sys/module/block2mtd/parameters/block2mtd
>>>>>>> + echo "/dev/mmcblk0p6,64KiB,header_1" >
>>>>>>> /sys/module/block2mtd/parameters/block2mtd
>>>>>>> + echo "/dev/mmcblk0p7,64KiB,kernel_1" >
>>>>>>> /sys/module/block2mtd/parameters/block2mtd
>>>>>>> + echo "/dev/mmcblk0p8,64KiB,rootfs_1" >
>>>>>>> /sys/module/block2mtd/parameters/block2mtd
>>>>>>> + ;;
>>>>>>> + esac
>>>>>>> +}
>>>>>>> +
>>>>>>
>>>>>> can this not go into the commandline inside the devicetree ?
>>>>> I tried, but block2mtd accepts only one mapping in the command line.
>>>>>
>>>>> I will rework the patch the next days and send an update.
>>>> Why do we need block2mtd at all for this target?
>>>
>>> The system uses an internal mmc for storage of root fs and other data. I
>>> saw that the rb532 platform also uses block2mtd for this.
>>> With ubi on top of it, everything including sysupgrade worked nearly out of
>>> the box. That's why I preferred to use existing parts.
>>> If you have another idea, please tell. For me it's my first mmc based
>>> platform.
>> MMC is just a block device like any other. Please take a look at octeon,
>> mvebu or x86 as examples of how to do it without block2mtd.
>
> I have switched rootfs now to squashfs, that ist working. But I have problems
> with the overlayfs.
> It is on /dev/mmcblk0p1, but I do not understand how to tell the system to
> use this partition. I cannot find a matching example.
>
> What I did:
> 1) Added an fstab to the squassh image:
> config 'global'
> option anon_swap '0'
> option anon_mount '0'
> option auto_swap '1'
> option auto_mount '1'
> option delay_root '5'
> option check_fs '0'
>
> config 'mount'
> option device '/dev/mmcblk0p1'
> option enabled '1'
> option target '/overlay'
> option fstype 'ext4'
> option options 'rw,sync'
> option enabled_fsck 0
> option is_rootfs '1'
>
> 2) label the ext4fs rootfs_data
> 3) added rootfs_data=/dev/mmcblk0p1 on kernel commandline.
>
> But fstools does not mount it.
> Please help.
Don't put overlay mount stuff in the config. Make sure you have
e2fsprogs and mkf2fs enabled in your config and that the rootfs
partition is big enough to fit both the squashfs image and the overlay
filesystem.
- Felix
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