automount doesn't work without GPT table

[Alexander Shiyan]

Hello Sascha.

The error occurs in the cdev_mount_default() function.
cdev_get_mount_path() returns "/boot".
And indeed, the partition is mounted here for some reason...
I don't understand yet why this happens.

barebox at Mega-Milas Informer SAMA5D2:/ mount
none on / type ramfs
none on /dev type devfs
/dev/mmc1.0 on /boot type fat

Update:
I found that this happens if the CONFIG_OF_BAREBOX_ENV_IN_FS option is used.
When disabled, mounting occurs as expected, but in this case I cannot
use environments from a file from a partition on the SD card.
It is not yet clear how to get out of this situation...

Thanks!

чт, 27 февр. 2025 г. в 20:01, Sascha Hauer <s.hauer at pengutronix.de>:
>
> Hi ALexander,
>
> On Thu, Feb 27, 2025 at 09:37:37AM +0300, Alexander Shiyan wrote:
> > Hello All.
> >
> > I found that automounting does not work without a GPT table.
>
> So you mean it doesn't work when the device has a MBR instead of a GPT?
>
> > In the example below, it is not possible to automatically mount a
> > partition from an MMC card.
> > However, if I add the full paths to the command manually, everything works.
> >
> > barebox 2025.02.0-00690-ga6a0a0ba4f61 #12 Thu Feb 27 08:27:56 MSK 2025
> > Board: Mega-Milas MM-SM-SAMA5D2
> > AT91: Detected soc type: sama5d2
> > AT91: Detected soc subtype: sama5d27c_d1g
> > ...
> > sdhci-at91 b0000000.sdio-host at b0000000.of: registered as mmc1
> > mmc1: detected SD card version 2.0
> > mmc1: registered mmc1
> > ...
> > barebox at Mega-Milas Informer SAMA5D2:/ ls /mnt/mmc1.0
> > mount: Device or resource busy
>
> -EBUSY is a strange error code from mount(). Can you follow where it
> comes from?
>
> I can't reproduce it here. I tried both with a MBR and a GPT.
>
> Sascha
>
>
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