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Von: "Pintu Agarwal" <pintu.ping@gmail.com> An: "richard" <richard@nod.at> CC: "Greg KH" <greg@kroah.com>, "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> Gesendet: Montag, 19. Juli 2021 11:09:46 Betreff: Re: MTD: How to get actual image size from MTD partition
On Fri, 16 Jul 2021 at 21:56, Richard Weinberger <richard@nod.at> wrote:
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. :-)
Is it possible to use dm-verity with squashfs ? We are using squashfs for our rootfs which is an MTD block /dev/mtdblock44
Well, if you emulate a block device using mtdblock, you can use dm-verity and friends. Also consider using ubiblock. It offers better performance and wear leveling support. Thanks, //richard