diff options
| author | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2020-07-09 19:46:44 +0200 |
|---|---|---|
| committer | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2020-07-31 11:40:15 +0200 |
| commit | 02d6ac1060b4a937adce5912cc22177cac86c318 (patch) | |
| tree | 53478401e7ed3933d1b8314f1212d8c96303cc73 /include/image-commands.mk | |
| parent | ad3e1f9db4cffaec6700d780308fb6241c09a96f (diff) | |
| download | upstream-02d6ac1060b4a937adce5912cc22177cac86c318.tar.gz upstream-02d6ac1060b4a937adce5912cc22177cac86c318.tar.bz2 upstream-02d6ac1060b4a937adce5912cc22177cac86c318.zip | |
base-files: fwtool: make compat_version backward compatible
So far, the compatibility mechanism only works if both device and
image are already updated to the new routines. This patch extends
the sysupgrade metadata and fwtool_check_image() to account for
"older" images as well:
The basic mechanism for older devices to check for image compatibility
is the supported_devices entry. This can be exploited by putting
a custom message into this variable of the metadata, so older FW
will produce a mismatch and print the message as it thinks it's the
list of supported devices. So, we have two cases:
device 1.0, image 1.0:
The metadata will just contain supported_devices as before.
device 1.0, image 1.1:
The metadata will contain:
"new_supported_devices":["device_string1", "device_string2", ...],
"supported_devices":["Image version 1.1 incompatible to device: ..."]
If the device is "legacy", i.e. does not have the updated fwtool.sh,
it will just fail with image check and print the content of
supported_devices. If DEVICE_COMPAT_MESSAGE is set, this will be
printed on old devices as well through the same mechanism. Otherwise
a generic "Please check documentation ..." is appended.
Upgrade can still be performed with -F like when
SUPPORTED_DEVICES has been removed to prevent bricking.
If the device has updated fwtool.sh (but is 1.0), it will just use
the new_supported_devices instead, and work as intended (flashing
with -n will work, flashing without will print the appropriate
warning).
This mechanism should provide a fair tradeoff between simplicity
and functionality.
Since we touched a lot of fields in metadata, this also bumps
metadata_version to 1.1.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Diffstat (limited to 'include/image-commands.mk')
| -rw-r--r-- | include/image-commands.mk | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/image-commands.mk b/include/image-commands.mk index 9da712e733..7a370034c8 100644 --- a/include/image-commands.mk +++ b/include/image-commands.mk @@ -390,10 +390,13 @@ json_quote=$(subst ','\'',$(subst ",\",$(1))) metadata_devices=$(if $(1),$(subst "$(space)","$(comma)",$(strip $(foreach v,$(1),"$(call json_quote,$(v))")))) metadata_json = \ '{ $(if $(IMAGE_METADATA),$(IMAGE_METADATA)$(comma)) \ - "metadata_version": "1.0", \ + "metadata_version": "1.1", \ "compat_version": "$(call json_quote,$(compat_version))", \ $(if $(DEVICE_COMPAT_MESSAGE),"compat_message": "$(call json_quote,$(DEVICE_COMPAT_MESSAGE))"$(comma)) \ - "supported_devices":[$(call metadata_devices,$(SUPPORTED_DEVICES))], \ + $(if $(filter-out 1.0,$(compat_version)),"new_supported_devices":[$(call metadata_devices,$(SUPPORTED_DEVICES))]$(comma)) \ + $(if $(filter-out 1.0,$(compat_version)),"supported_devices": \ + ["$(call json_quote,Image version $(compat_version) incompatible to device: $(if $(DEVICE_COMPAT_MESSAGE),$(DEVICE_COMPAT_MESSAGE),Please check documentation ...))"]$(comma)) \ + $(if $(filter 1.0,$(compat_version)),"supported_devices":[$(call metadata_devices,$(SUPPORTED_DEVICES))]$(comma)) \ "version": { \ "dist": "$(call json_quote,$(VERSION_DIST))", \ "version": "$(call json_quote,$(VERSION_NUMBER))", \ |