Re-reading the partition table doesn't work reliably, it fails if
anything on the device is still in use and it's not trivial to prevent
every possible case of a block device still being in use somehow.
Therefore, instead of relying on the in-kernel partition parser to know
where to write the configuration backup, use OpenWrt's format-agnostic
fwtool to strip off all metadata from the image and count its blocks
while writing. In that way we can know where to write the config backup
without needing the kernel to parse the MBR and FIT structures.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Use find_mmc_part instead of previously introduced
get_partition_by_name which requires a custom kernel patch.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
In case of the block device still being in use, re-reading the
partition table fails. In that case, abort sysupgrade to avoid
corrupting the just-written image because of wrong offsets caused
by failure to re-read the partition table.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
* introduce recovery (=initramfs) vs. production dual boot scheme
* make use of uImage.FIT (instead of FAT partition)
* generate images using build steps (instead of external scripts)
* simplify sysupgrade and config restore (thanks to uImage.FIT)
* make sure mmc devices are ordered persistently (set DT aliases)
This commit breaks sysupgrade from existing installations, you will
have to re-install using the sdcard.img.gz image.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
An upcoming commit will add a full system image for U7623 which will
contain the MBR partition table and U-Boot too.
That contrasts with the current image which only owns the eMMC from
sector 0xa00 onwards, and must start with a legacy uImage.
Prepare for sysupgrade to the new images, and cope with the fact that
the recovery partition will be /dev/mmcblk0p2 instead of /dev/mmcblk0p1
after the upgrade.
This commit could potentially be backported to 19.07 to allow for direct
sysupgrade to the new image layout.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This splits some base-files across subtargets, as done previously
on ath79 and ramips and also introduced for mt7629 subtarget here
already. Most of the existing base-files content is specific to
mt7623.
While at it, apply the following fixes:
- Remove lots of trailing whitespaces
- Remove wildcard on unielec,u7623-02-emmc-512m
- Remove inconsistent quotation marks in cases
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: John Crispin <john@phrozen.org>
