mesh dfu distributor image size

[AndyM]

Hello

I am playing with the mesh dfu and the distributor application on nRF52840 DK board

I load the image I want to distribute using mcumgr application on a Raspberry pi

Noticed a discrepancy in the image size listed by the "ls -al" command on linux and the size returned from 

boot_read_bank_header(FIXED_PARTITION_ID(slot1_partition), &header,sizeof(header)) API on the distributor.

The size of the header.h.v1.image_size is 633 bytes less than the one reported by the file system.

As a result the  image is transferred successfully to the target but fails to be applied. And the 'mcumgr list image' command does not list the image in slot 1 on the target device after the transfer completes

If I specify the image image size listed on linux in the 'mesh models dfu slot add' command the transfer and image swap succeed

This must be some sort of a header `

The question is, is the size fixed or will vary from image to image? If the latter - where can I obtain the size of the header so I can add it to the header.h.v1.image_size returned by boot_read_bank_header() API?
Thanks

[tesc]

Hi,

I am sorry for the delays. Have you found an answer on your own, or do you still want us to look into the issue?

Also, may I ask what the size reported by the file system is? Might it be that the file size reported by the file system is block aligned, such that empty space beyond the end of the file contents is counted?

Regards,
Terje

[AndyM]

I worked around this, let's close

Thank you