----- Ursprüngliche Mail ----- > Von: "Greg KH" <greg@xxxxxxxxx> > An: "Pintu Agarwal" <pintu.ping@xxxxxxxxx> > CC: "linux-kernel" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-mtd" <linux-mtd@xxxxxxxxxxxxxxxxxxx>, "linux-fsdevel" > <linux-fsdevel@xxxxxxxxxxxxxxx>, "Phillip Lougher" <phillip@xxxxxxxxxxxxxxx>, "Sean Nyekjaer" <sean@xxxxxxxxxx>, > "Kernelnewbies" <kernelnewbies@xxxxxxxxxxxxxxxxx>, "richard" <richard@xxxxxx> > Gesendet: Freitag, 16. Juli 2021 17:41:01 > Betreff: Re: MTD: How to get actual image size from MTD partition > On Fri, Jul 16, 2021 at 12:12:41PM +0530, Pintu Agarwal wrote: >> Hi, >> >> Our ARM32 Linux embedded system consists of these: >> * Linux Kernel: 4.14 >> * Processor: Qualcomm Arm32 Cortex-A7 >> * Storage: NAND 512MB >> * Platform: Simple busybox >> * Filesystem: UBIFS, Squashfs >> * Consists of nand raw partitions, squashfs ubi volumes. >> >> My requirement: >> To find the checksum of a real image in runtime which is flashed in an >> MTD partition. > > Try using the dm-verity module for ensuring that a block device really > is properly signed before mounting it. That's what it was designed for > and is independent of the block device type. MTDs are not block devices. :-) Thanks, //richard
