Hello, On Mon, 30 Aug 2021 23:48:40 +0530 Pintu Agarwal <pintu.ping@xxxxxxxxx> wrote: > ohh that means we already have a working reference. > If possible can you share the details, even 4.19 or higher will be > also a good reference. > > > > Or, another option is to use the new concept from 5.1 kernel that is: > > > dm-mod.create = ? > > How are you doing it today without dm-mod.create ? > I think in 4.14 we don't have dm-mod.create right ? No, but you can backport it easily. Back at http://lists.infradead.org/pipermail/openwrt-devel/2019-November/025967.html I provided backports of this feature to OpenWrt, for the 4.14 and 4.19 kernels. > Here is our kernel command line: > > [ 0.000000] Kernel command line: ro rootwait > console=ttyMSM0,115200,n8 .... verity="95384 11923 > 16da5e4bbc706e5d90511d2a3dae373b5d878f9aebd522cd614a4faaace6baa3 12026 > " rootfstype=squashfs ubi.mtd=40,0,30 ubi.block=0,0 root=/dev/dm-0 > .... init=/sbin/init root=/dev/dm-0 dm="rootfs none ro,0 95384 verity > 1 /dev/ubiblock0_0 /dev/mtdblock53 4096 4096 11923 8 sha256 > 16da5e4bbc706e5d90511d2a3dae373b5d878f9aebd522cd614a4faaace6baa3 > aee087a5be3b982978c923f566a94613496b417f2af592639bc80d141e34dfe7 10 > restart_on_corruption ignore_zero_blocks use_fec_from_device > /dev/mtdblock53 fec_roots 2 fec_blocks 12026 fec_start 12026" ... I don't see how this can work without the dm-mod.create feature. Are you sure the verity= and dm= kernel arguments exist? Best regards, Thomas -- Thomas Petazzoni, co-owner and CEO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
