On 07/08/2015 07:42 PM, Bruno Randolf wrote: > Hi! > > I have the below change to add rudimentary support for sysupgrade on the > Raspberry Pi. I looked at the way platform_copy_config() is implemented > for x86 and tried to do the same, but I get the following error on mount: > > mount: mounting /dev/mmcblk0p2 on /mnt failed: Device or resource busy > > I believe I'd need some way to re-read the partition table after the dd > command. How does it work on x86? Any ideas? > > Also would it be OK to gzip the sdcard image to save space? It > compresses from 76M to 11M.
I think it would be nice to put the gzip command into an
ifneq ($(CONFIG_TARGET_IMAGES_GZIP),) check. CONFIG_TARGET_IMAGES_GZIP
defaults to y, but is currently only respected on x86... I guess it
would make sense to handle it on other targets with ext4 images as well.
Matthias
>
> Below is the diff, but this is not a properly formatted patch, yet.
>
> bruno
>
> diff --git a/target/linux/brcm2708/base-files/lib/upgrade/platform.sh
> b/target/linux/brcm2708/base-files/lib/upgrade/platform.sh
> new file mode 100644
> index 0000000..95ade38
> --- /dev/null
> +++ b/target/linux/brcm2708/base-files/lib/upgrade/platform.sh
> @@ -0,0 +1,19 @@
> +platform_check_image() {
> + # i know no way to verify the image
> + return 0;
> +}
> +
> +platform_do_upgrade() {
> + sync
> + get_image "$1" | dd of=/dev/mmcblk0 bs=2M conv=fsync
> + sleep 1
> +}
> +
> +## mount does not work. I think I'd need to re-read the partition table!
> +#platform_copy_config() {
> +# echo "*** platform_copy_config called" > /dev/console
> +# mount -t ext4 -o rw,noatime /dev/mmcblk0p2 /mnt
> +# cp -af "$CONF_TAR" /mnt/
> +# umount /mnt
> +# echo "*** platform_copy_config done" > /dev/console
> +#}
> diff --git a/target/linux/brcm2708/image/Makefile
> b/target/linux/brcm2708/image/Makefile
> index e70bdd0..095cf0d 100644
> --- a/target/linux/brcm2708/image/Makefile
> +++ b/target/linux/brcm2708/image/Makefile
> @@ -28,6 +28,7 @@ define Image/Build/RaspberryPi
> mcopy -i $(KDIR)/boot.img $(KDIR)/Image ::kernel.img # Copy
> OpenWrt built kernel
> ./gen_rpi_sdcard_img.sh
> $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1).img $(KDIR)/boot.img
> $(KDIR)/root.$(1) \
> $(CONFIG_BRCM2708_SD_BOOT_PARTSIZE)
> $(CONFIG_TARGET_ROOTFS_PARTSIZE)
> + gzip -k -f $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1).img
> endef
>
> define Image/Build
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