Messages in this thread | | | From | Pintu Agarwal <> | Date | Fri, 16 Jul 2021 12:12:41 +0530 | Subject | MTD: How to get actual image size from MTD partition |
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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.
Problem: Currently, to find the checksum, we are using: $ md5sum /dev/mtd14 This returns the proper checksum of the entire partition. But we wanted to find the checksum only for the actual image data which will be used by our C utility to validate the image. Here, we don't know the actual image size. We only know the "partition-size" and "erasesize".
So, is there a mechanism to somehow find the image size at runtime?
Regards, Pintu
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