Re: [PATCH v2] tools: mkimage: Call verify_header after writing image to disk

[Tom Rini]

On Fri, Jan 14, 2022 at 06:34:43PM +0100, Pali Rohár wrote:

> If image backend provides verify_header callback then call it after writing
> image to disk. This ensures that written image is correct.
> 
> Signed-off-by: Pali Rohár <p...@kernel.org>
> Reviewed-by: Stefan Roese <s...@denx.de>
> Reviewed-by: Simon Glass <s...@chromium.org>
> ---
>  tools/mkimage.c | 41 +++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
> 
> diff --git a/tools/mkimage.c b/tools/mkimage.c
> index fbe883ce3620..d5ad0925225c 100644
> --- a/tools/mkimage.c
> +++ b/tools/mkimage.c
> @@ -336,6 +336,44 @@ static void process_args(int argc, char **argv)
>               usage("Missing output filename");
>  }
>  
> +static void verify_image(const struct image_type_params *tparams)
> +{
> +     struct stat sbuf;
> +     void *ptr;
> +     int ifd;
> +
> +     ifd = open(params.imagefile, O_RDONLY | O_BINARY);
> +     if (ifd < 0) {
> +             fprintf(stderr, "%s: Can't open %s: %s\n",
> +                     params.cmdname, params.imagefile,
> +                     strerror(errno));
> +             exit(EXIT_FAILURE);
> +     }
> +
> +     if (fstat(ifd, &sbuf) < 0) {
> +             fprintf(stderr, "%s: Can't stat %s: %s\n",
> +                     params.cmdname, params.imagefile, strerror(errno));
> +             exit(EXIT_FAILURE);
> +     }
> +     params.file_size = sbuf.st_size;
> +
> +     ptr = mmap(0, params.file_size, PROT_READ, MAP_SHARED, ifd, 0);
> +     if (ptr == MAP_FAILED) {
> +             fprintf(stderr, "%s: Can't map %s: %s\n",
> +                     params.cmdname, params.imagefile, strerror(errno));
> +             exit(EXIT_FAILURE);
> +     }
> +
> +     if (tparams->verify_header((unsigned char *)ptr, params.file_size, 
> &params) != 0) {
> +             fprintf(stderr, "%s: Failed to verify header of %s\n",
> +                     params.cmdname, params.imagefile);
> +             exit(EXIT_FAILURE);
> +     }
> +
> +     (void)munmap(ptr, params.file_size);
> +     (void)close(ifd);
> +}
> +
>  int main(int argc, char **argv)
>  {
>       int ifd = -1;
> @@ -698,6 +736,9 @@ int main(int argc, char **argv)
>               exit (EXIT_FAILURE);
>       }
>  
> +     if (tparams->verify_header)
> +             verify_image(tparams);
> +
>       exit (EXIT_SUCCESS);
>  }

I've added Joseph Chen to the thread as with this patch applied,
evb-rk3568 fails to build now with:
./tools/mkimage: Failed to verify header of idbloader.img
which is another issue to resolve.

-- 
Tom

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