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Von: "Greg KH" <greg@kroah.com> An: "Pintu Agarwal" <pintu.ping@gmail.com> CC: "linux-kernel" <linux-kernel@vger.kernel.org>, "linux-mtd" <linux-mtd@lists.infradead.org>, "linux-fsdevel" <linux-fsdevel@vger.kernel.org>, "Phillip Lougher" <phillip@squashfs.org.uk>, "Sean Nyekjaer" <sean@geanix.com>, "Kernelnewbies" <kernelnewbies@kernelnewbies.org>, "richard" <richard@nod.at> 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