Some setups have alternate boot actions in case the main OS fails to
boot. These can include a secondary copy of the OS, a recovery OS, a
fallback to TFTP boot, etc.
This commit invalidates the kernel image while rootfs is being written
which, if a sysupgrade is interrupted, will trigger an alternate boot
action in devices that support it. This results in safer sysupgrades.
Signed-off-by: Rodrigo Balerdi <lanchon@gmail.com>
emmc_do_upgrade() relies on identify() from the nand.sh upgrade helper.
This only works because FEATURES=emmc targets also tend to include
FEATURES=nand.
Rename identify_magic() to identify_magic_long() to match the common.sh
style and make it clear it pairs with other *_long() variants (and not,
say *_word()).
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Rootfs overlays get created at a ROOTDEV_OVERLAY_ALIGN (64KiB)
alignment after the rootfs, but emmc_do_upgrade() is assuming
it comes at the very next 512-byte sector.
Suggested-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
(move spaces around, mention fstools' libtoolfs)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Adds generic support for sysupgrading on eMMC-based devices.
Provide function emmc_do_upgrade and emmc_copy_config to be used in
/lib/upgrade/platform.sh instead of redundantly implementing the same
logic over and over again.
Similar to generic sysupgrade on NAND, use environment variables
CI_KERNPART, CI_ROOTPART and newly introduce CI_DATAPART to indicate
GPT partition names to be used. On devices with more than one MMC
block device, CI_ROOTDEV can be used to specify the MMC device for
partition name lookups.
Also allow to select block devices directly using EMMC_KERN_DEV,
EMMC_ROOT_DEV and EMMC_DATA_DEV, as using GPT partition names is not
always an option (e.g. when forced to use MBR).
To easily handle writing kernel and rootfs make use of sysupgrade.tar
format convention which is also already used for generic NAND support.
Signed-off-by: Enrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
CC: Li Zhang <li.zhang@gl-inet.com>
CC: TruongSinh Tran-Nguyen <i@truongsinh.pro>
