installing bundle using streaming giving error : BLK_DEV_NBD not enabled in kernel

[abdo12007]

i have bitbaked a core-image-base for the rspberry pi
i have made sure that this options kernel are enable in the rauc.cfg :

CONFIG_BLK_DEV_LOOP=y
CONFIG_SQUASHFS=y
CONFIG_MD=y
CONFIG_BLK_DEV_DM=y
CONFIG_DM_VERITY=y
CONFIG_CRYPTO_SHA256=y

then i generate the img , flashing it on an sd card and it works on the raspberry pi3
then i generate a bundle in the plain format and i installed it using rauc install ... and it works fine.

then

uncommenting this option on the .bb file
RAUC_BUNDLE_FORMAT = "verity"

and i generated another bundle in the verity format and i installed it using streaming
but i get this error :
failed mounting bundle: failed to resolve 'ndb' netlink family - BLK_DEV_NBD not enabled in kernel

why i got BLK_DEV_NBD not enabled in kernel although i have enable it on the rauc.cfg ?
could that be because i am using an sd card ?
how can i solve this ?

[leon-anavi]

Hi @abdo12007,

Which Yocto release and branch for meta-rauc-raspberrypi are you using?

Best regards, Leon

[abdo12007]

hello @leon-anavi
i am using Yocto Dunfell
meta-rauc-raspberrypi = "dunfell:738db79bd714f7ca5969482a2c7cab80471d8e9f

[leon-anavi]

Hi @abdo12007,

Support for streaming installation from a HTTP(S) server for bundles in verity was added in RAUC version v1.7 and I see meta-rauc dunfell as of the moment provide v1.8 so in this aspect you should be ok.

Have you added CONFIG_BLK_DEV_NBD=y to the rauc.cfg kernel fragment for Raspberry Pi?

Best regards,
Leon

[abdo12007]

yes i have added CONFIG_BLK_DEV_NBD=y .
this is the content of $PWD/poky-rpi-rauc/meta-rauc/recipes-kernel/linux/linux-yocto/rauc.cfg
CONFIG_BLK_DEV_LOOP=y
CONFIG_SQUASHFS=y
CONFIG_MD=y
CONFIG_BLK_DEV_DM=y
CONFIG_DM_VERITY=y
CONFIG_CRYPTO_SHA256=y
CONFIG_BLK_DEV_NBD=y

always the same issue

[abdo12007]

hello @leon-anavi
after i rebuild the hole image
now i am getting this error :
Failed mounting bundle: failed to open /dev/mapper/control: no such file or directory

[ejoerns]

@abdo12007 please check if the kernel generated actually has DM enabled. It does not look like if this would be the case.

In your kernel build dir you should see the actual .config generated. If this looks fine, please check if the kernel built is actually the kernel installed on the target (e.g. by comparing checksums).

[abdo12007]

hello,
I verified and the DM is enable go this error :
failed mounting bundle: failed to load dm table: invalid argument
are you familiar with this error ?

[ejoerns]

hello, I verified and the DM is enable go this error : failed mounting bundle: failed to load dm table: invalid argument are you familiar with this error ?

This could mean you have enabled DM support but not DM_VERITY.

[abdo12007]

[ejoerns]

It is a kernel option (CONFIG_DM_VERITY) and you already mentioned it in the above config fragment.

Make sure that you apply the config fragment to the kernel you are using (above one assumes you are using linux-yocto).

Please refer to general yocto project documentation on yocto usage and how to manipulate kernel config since this is out-of-scope here.