Commit Graph

1407 Commits

Author SHA1 Message Date
Daniel Golle
287bd78e6f
base-files: remove unneeded '$' signs in nand.sh
When using Shell arithmetric evaluation via $((..)) the variables in
the expression do not need to be prefixed by the '$' sign.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-02-24 11:42:02 +00:00
Daniel Golle
5c10f26c28 sysupgrade-nand: allow limiting rootfs_data by setting env variable
Check if firmware environment variable 'rootfs_data_max' exists and is
set to a numerical value greater than 0. If so, limit rootfs_data
volume to that size instead of using the maximum available size.

This is useful on devices with lots of flash where users may want to
have eg. a volume for persistent logs and statistics or for external
applications/containers. Persistence on rootfs overlay is limited by
the size of memory available during the sysugprade process as that
data needs to be copied to RAM while the volume is being recreated
during sysupgrade. Hence it is unsuitable for keeping larger amounts
of data accross upgrade which makes additional volume(s) for
application data desirable.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-02-24 01:35:20 +00:00
Daniel Golle
e6aac8d98f image: add support for building FIT image with filesystem
Allow for single (external-data) FIT image to hold kernel, dtb and
squashfs. In that way, the bootloader verifies the system integrity
including the rootfs, because what's the point of checking that the
hash of the kernel is correct if it won't boot in case of squashfs
being corrupted? Better allow bootloader to check everything needed
to make it at least up to failsafe mode. As a positive side effect
this change also makes the sysupgrade process on nand potentially
much easier as it is now.
In short: mkimage has a parameter '-E' which allows generating FIT
images with 'external' data rather than embedding the data into the
device-tree blob itself. In this way, the FIT structure itself remains
small and can be parsed easily (rather than having to page around
megabytes of image content). This patch makes use of that and adds
support for adding sub-images of type 'filesystem' which are used to
store the squashfs. Now U-Boot can verify the whole OS and the new
partition parsers added in the Linux kernel can detect the filesystem
sub-images, create partitions for them, and select the active rootfs
volume based on the configuration in FIT (passing configuration via
device tree could be implemented easily at a later stage).

This new FIT partition parser works for NOR flash (on top of mtdblock),
NAND flash (on top of ubiblock) as well as classic block devices
(ie. eMMC, SDcard, SATA, NVME, ...).
It could even be used to mount such FIT images via `losetup -P` on a
user PC if this patch gets included in Linux upstream one day ;)

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-02-24 01:35:20 +00:00
Rosen Penev
157cd0bd97 base-files: use hwclock --systz
The date -k patch is non standard and will be removed in the next
commit.

Tested behavior to be identical with a simple C program:

 #define _GNU_SOURCE
 #include <unistd.h>
 #include <stdio.h>
 #include <sys/time.h>
 #include <sys/syscall.h>

int main()
{
        struct timezone tt;
	struct timezone tz;

        int a = syscall(SYS_gettimeofday, NULL, &tt);
        int b = gettimeofday(NULL, &tz);
        printf("%d - %d, %d\n", a, tt.tz_minuteswest, tt.tz_dsttime);
        printf("%d - %d, %d\n", b, tz.tz_minuteswest, tz.tz_dsttime);
}

Signed-off-by: Rosen Penev <rosenp@gmail.com>
2021-02-14 15:15:32 +01:00
Brian Norris
95b30f84d2 base-files: mount pstore if present
Pstore (persistent store) can be used to stash debug information (kernel
console, panics, ftrace) across reboots or crashes. If the filesystem is
present, mount it.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2021-01-29 22:26:36 +01:00
Adrian Schmutzler
396a35dd51 base-files: remove execute bit and shebang from functions.sh
/lib/functions.sh was executable for no obvious reason and its
execute property was even checked in package-ipkg.mk just to
source it afterwards.

Remove the execute bit and shebang as this is clearly a library.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Reviewed-by: Philip Prindeville <philipp@redfish-solutions.com>
2021-01-29 14:30:32 +01:00
Adrian Schmutzler
331892f85f treewide: drop shebang from non-executable lib files
This drops the shebang from another bunch of files in various /lib
folders, as these are sourced and the shebang is useless.

Fix execute bit in one case, too.

This should cover almost all trivial cases now, i.e. where /lib is
actually used for library files.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2021-01-29 14:29:41 +01:00
Paul Spooren
2d72be766d base-files: bump Copyright to 2021
This commit is only added to keep the PKG_RELEASE correct after fixing
the $(COMMITCOUNT) logic in the previous commit.

This way the PKG_RELEASE stays the same while the compiled packages
content isn't changed.

Signed-off-by: Paul Spooren <mail@aparcar.org>
2021-01-26 17:30:09 -10:00
Paul Spooren
aa589c77b4 base-files: use $(COMMITCOUNT) in PKG_RELEASE
The newly added `$(COMMITCOUNT)` varialbe allows automatic versioning
based on the number of Git commits of a package. Replace *tedious to
bump* and *merge conflict causing* `PKG_RELEASE` and replace it with
`$(COMMITCOUNT)`.

Signed-off-by: Paul Spooren <mail@aparcar.org>
2021-01-22 19:03:53 -10:00
Adrian Schmutzler
81655e1450 base-files: read all 3 bytes in get_magic_vfat() at once
While the speed improvement might be negligible, there is still no
reason to read individual bytes.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2021-01-07 19:51:50 +01:00
Daniel Golle
9c845a5ad1 base-files: wifi: add support for 802.11ad
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-01-05 02:16:24 +00:00
Kagurazaka Kotori
927b9df938 x86/efi: add FAT32 esp mounting support
Adds a new function get_magic_fat32() in base-files to read FAT32 magic.
Now FAT32 EFI system partition can be handled in the same way as FAT12/FAT16.

Signed-off-by: Kagurazaka Kotori <kagurazakakotori@gmail.com>
[replace '-o' with '] || [' to satisfy shellsheck]
Signed-off-by: Paul Spooren <mail@aparcar.org>
2021-01-03 13:48:50 -10:00
Oldřich Jedlička
49d678f0d2 base-files: allow reusing of boolean value extraction logic
The `functions.sh` script has `config_get_bool()` function, which is
usable when using UCI config direct access API, but there is no
equivalent for the callback API. Introduce `get_bool()` function to
allow reusing it from init scripts.

Example:

```sh
option_cb() {
    local option="$1"
    local value="$(get_bool "$2")"
    ...
}
```

Signed-off-by: Oldřich Jedlička <oldium.pro@gmail.com>
2021-01-01 10:23:56 -10:00
Adrian Schmutzler
93b6122212 base-files: sysupgrade: add function for conffiles retrieval
The find command to retrieve files from /etc/sysupgrade.conf and
/lib/upgrade/keep.d/* is used twice in almost the same way.

Move it into a function to consolidate, enhance readability and make
future adjustments easier.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Paul Spooren <mail@aparcar.org>
Reviewed-by: Philip Prindeville <philipp@redfish-solutions.com>
2020-12-30 00:00:13 +01:00
Piotr Dymacz
8c28da9724 base-files: drop banner.failsafe if failsafe is disabled
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
2020-12-22 21:27:25 +01:00
Hannu Nyman
3d12b47985 base-files: flush kernel memory cache during sysupgrade
Flush kernel memory caches during sysupgrade in order
to mitigate the impact from memory consumption spikes
in low-RAM devices.

This may help to prevent sysupgrade causing a reboot
before the actual flashing starts.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
2020-12-22 18:59:10 +01:00
Robert Marko
20d847d133 base-files: upgrade: fix initramfs detection
Commit "initramfs: switch to tmpfs to fix ujail" switched initramfs to
now use tmpfs, it causes $(rootfs_type) to now return tmpfs when
running initramfs image instead of being empty.

This broke initramfs detection which prevents config files from
being saved as it does not work from initramfs.

So, lets test for $(rootfs_type) returning "tmpfs" instead.

Fixes: 7fd3c68 ("initramfs: switch to tmpfs to fix ujail)

Signed-off-by: Robert Marko <robimarko@gmail.com>
2020-12-20 17:14:56 +00:00
John Thomson
d82c191283 package/base-files: caldata: use dd iflag fullblock
This dd flag ensures that the requested size
is retrieved from pipes or special filesystems (if available).

Without this flag, on multi-core systems,
Piped or special filesystem data can be truncated
when a size greater than PIPE_BUF is requested.

Fixes: FS#3494
Fixes: 7557e7f ("package/base-files: caldata: work around dd's
limitation")
Cc: Thibaut VARÈNE <hacks@slashdirt.org>

Signed-off-by: John Thomson <git@johnthomson.fastmail.com.au>
2020-12-11 13:48:24 +01:00
Stan Grishin
b4f1f9c9e4 base-files: informative service command in /etc/shinit. service command shows services enabled/disabled and running status, when the service command is invoked with no/invalid arguments, like this:
Usage: service <service> [command]
The following services are available:
/etc/init.d/acme                   enabled         stopped
/etc/init.d/boot                   enabled         stopped
/etc/init.d/cron                   enabled         running
/etc/init.d/dnsmasq                enabled         running
...

Signed-off-by: Stan Grishin <stangri@melmac.net>
2020-12-03 23:28:43 -10:00
John Crispin
9290539ca9 base-files: allow setting device and bridge macs
Add code for setting mac addresses inside board.json and rendering
them out to uci. On switches we want to have a unique MAC on each port.
With 48 port switches that would require 48 device sections in
/etc/config/network. Doing so via board.json is easier.

Signed-off-by: John Crispin <john@phrozen.org>
2020-12-02 07:51:36 +01:00
Huangbin Zhan
451c1eb8c2 base-files: fix alias more to properly detect /usr/bin/more
Package more is installed to /usr/bin rather than /bin.

Signed-off-by: Huangbin Zhan <zhanhb88@gmail.com>
2020-11-28 15:12:36 -10:00
Imran Khan
9c2eceef90 base-files: merge /etc/passwd on rw-rootfs
Support installations without root-overlayfs (and hence without /rom)
when migrating user accounts.

Signed-off-by: Imran Khan <gururug@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
[simplified patch, bumped PKG_RELEASE, cleaned message]
2020-11-27 09:59:14 +00:00
Rosen Penev
b9246bbdc9 base-files: functions.sh: replace [^...] with [!...] in case
Strictly speaking, ash does not support it.

From https://wiki.ubuntu.com/DashAsBinSh#A.5B.5E.5D

Not to be confused by sed's and other program's regular expression
syntax. Uses of [^...] in case (parameter/word expansion in general) need
to be replaced with [!...].

Found with shellcheck: https://github.com/koalaman/shellcheck/wiki/SC2169

Signed-off-by: Rosen Penev <rosenp@gmail.com>
[minor commit title/message adjustments]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-11-25 17:22:39 +01:00
John Crispin
8134c542e2 base-files: generated named bridge-vlan sections
Signed-off-by: John Crispin <john@phrozen.org>
2020-11-19 15:38:37 +01:00
Matthias Schiffer
3f1109bf2a
base-files: fix backwards compatiblity of rc.common EXTRA_COMMANDS
Avoid needlessly breaking old initscripts that set EXTRA_COMMANDS. This
will aid in debugging (as it simplifies reverting to an older version of
a package) and unbreaks third-party feeds (and packages that maintain
their OpenWrt initscripts as part of the software's repo instead of the
OpenWrt feed like fastd).

Without this, initscripts that set EXTRA_COMMANDS become completely
unusable, as all default commands like start/stop cease working.

Fixes: 1a69f50dc6 ("base-files: fix rc.common help alignment")
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
2020-11-17 17:57:42 +01:00
Yousong Zhou
600bcaf9c9 base-files: bump PKG_RELEASE
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
2020-11-11 21:29:55 +08:00
Yousong Zhou
00fb51f97e base-files: upgrade: stage2: use v for log lines
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
2020-11-11 21:29:55 +08:00
Yousong Zhou
128bb4e8d3 base-files: upgrade: fwtool.sh: rewording logs
The intent is to make it sound more like info level message, not some
error like "404 not found".  x86 target at the moment makes image with
only signature but no metadata (ref commit f8141216 "x86: append
metadata to combined images").

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Reviewed-By: Philip Prindeville <philipp@redfish-solutions.com>
2020-11-11 21:29:55 +08:00
Yousong Zhou
856b288d27 base-files: upgrade: fwtool.sh: use v for log lines
This will have at least the following effects

 - Log lines will have common prefix
 - They will be output to stderr instead of stdout

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
2020-11-11 21:29:55 +08:00
Yousong Zhou
50b870ee3c base-files: upgrade: add get_image_dd()
This is mainly to handle stderr message "Broken pipe", "F+P records
in/out" by common pattern "xcat | dd .."

Ref: https://bugs.openwrt.org/index.php?do=details&task_id=3140
Reported-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Reviewed-By: Philip Prindeville <philipp@redfish-solutions.com>
2020-11-11 21:29:55 +08:00
Yousong Zhou
bd21e4a936 base-files: upgrade: use stdin redirection to replace cat command
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
2020-11-11 21:29:55 +08:00
Yousong Zhou
7863c33cea base-files: upgrade: add vn and variants
To be used with in the following pattern

  vn "Remaining: "
  for p in $xx; do
    _vn "$p"
  done
  _v

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
2020-11-11 21:29:55 +08:00
Yousong Zhou
826bb13742 base-files: upgrade: log with date prefix
And log to stderr

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
2020-11-11 21:29:55 +08:00
John Crispin
be09c5a3cd base-files: add board.d support for bridge device
Latest netifd allows us to setup network bridges with implicit vlan
tagging. For this to work, we need to setup several additional uci
sections. This feature is particularly usefull for DSA tupe devices.
Add board.d and uci-defaults support for generating the sections.

Signed-off-by: John Crispin <john@phrozen.org>
2020-11-04 07:36:49 +01:00
Florian Eckert
1a69f50dc6 base-files: fix rc.common help alignment
This commit introduces a new function `extra_command` to better format
the help text without having to calculate the indentation in every startup
script that wants to add a new command. So far it looks weird and is not
formatted correctly on some startup scripts.

After using the new `extra_command` wrapper the alignement looks correctly.

And if the indentation is not sufficient in the future, this can be
changed in the function extra_command at a central location.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>
2020-11-02 21:32:38 +01:00
Daniel Golle
de7ca7dafa base-files: merge /etc/passwd et al at sysupgrade config restore
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-10-22 14:25:55 +01:00
Daniel Golle
d355b578b7 target: include selinux-variants if CONFIG_SELINUX is set
Rather than unconditionally adding busybox and procd to the set of
default packages, add busybox-selinux and procd-selinux in case
CONFIG_SELINUX is set.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-10-21 11:56:26 +01:00
Felix Fietkau
4a0688ed71 base-files: remove block2mtd checks from sysupgrade
This hasn't been used in a long time

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2020-10-17 16:43:17 +02:00
Adrian Schmutzler
9b4eab023c base-files: allow exceptions when removing devicename from LEDs
Without the model-based devicename for LEDs, there are still cases
where a third component is required, typically when it refers to
internal "devices" like phys etc. An example are the following two
found on ramips:

  - rt2800soc-phy0::radio
  - rt2800pci-phy0::radio

So far, the rt2800*-phy: prefixes would be removed by the devicename
removal ("migration") script, and the configuration for these LEDs
would be broken.

To address this, this patch allows to add arguments to a call of
remove_devicename_leds, which will be compared against the first
part of the LED names/labels, and then be ignored by the routine,
and thus not removed:

  remove_devicename_leds "rt2800soc-phy0" "rt2800pci-phy0"

This mechanism is supposed to be used when a "devicename" applies
to several devices. If only a single device is affected, it might
be more effective to use a case statement and exclude the device
from migration by that entirely.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-10-02 14:51:57 +02:00
Adrian Schmutzler
365a639f91 base-files: add function to remove devicename from LED labels
Currently, we request LED labels in OpenWrt to follow the scheme

  modelname:color:function

However, specifying the modelname at the beginning is actually
entirely useless for the devices we support in OpenWrt. In patches
subsequent to this one, we will thus remove the modelname from
the label definitions on various targets.

To migrate the existing definitions from older installations,
a migration script needs to be deployed that does

  modelname:color:function -> color:function

e.g.

  dir-789:green:status -> green:status

This patch introduces two functions that do exactly that:
For each entry in /etc/config/system, the routine will check whether
two (or more) colons are present, and then remove everything up to
(and including) the first colon.

For now, this will be applied unconditionally, i.e. if the function
is called for a device, all labels will be cut like this.

However, for a future case of mixed three-part and two-part labels,
it should not be too hard to provide a function argument with
exceptions to the removal.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-10-02 13:50:50 +02:00
Adrian Schmutzler
cb9bb908de base-files: drop default setup for vconfig
vconfig has been disabled by default since 2015 [1] and there are
no remaining uses in entire OpenWrt trunk. However, we still set up
a specific name_type for it during boot.

While this setup is properly implemented to be only triggered when
vconfig is present, it still seems anachronistic and unnecessary
to set up a standard for a tool that is not used anymore.

Therefore, this removes the set_name_type initialization and leaves
it for those people actually using the tool to configure it as needed.

[1] 899a23227e ("busybox: improve applets & deprecate ifconfig, route")

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-09-16 17:28:20 +02:00
David Bauer
e087bb5bd7 base-files: disable LEDs if default state is undefined
Set the default state for LEDs to off. When a trigger is set, the
trigger will turn the LED automatically on.

Currently LEDs might stay on, e.g. when the LED trigger is set to a
netdev trigger and the interface is never activated or the 'none'
trigger is selected without setting the 'default' option to 0 and it's
set for the LED indicating the system running state.

Using off as a default value is also consistent with the documentation
in the OpenWrt wiki.

Signed-off-by: David Bauer <mail@david-bauer.net>
2020-09-11 17:34:54 +02:00
Christian Lamparter
a487e67cbc base-files: support label-property-less in get_dt_leds
The LED's "label" property has been deprecated in upstream by:

|commit c5d18dd6b64e09dd6984bda9bdd55160af537a8c
|Author: Jacek Anaszewski <jacek.anaszewski@gmail.com>
|Date:   Sun Jun 9 20:19:04 2019 +0200
|
|    dt-bindings: leds: Add properties for LED name construction
|
|    Introduce dedicated properties for conveying information about
|    LED function and color. Mark old "label" property as deprecated.
|
|    Additionally function-enumerator property is being provided
|    for the cases when neither function nor color can be used
|    for LED differentiation.

in order to be somewhat prepared, this patch adds a fallback
as a last resort to make the current led code work by falling
back to the node-name as the "label".

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
2020-09-05 23:24:46 +02:00
Walter Sonius
46abcb3ade base-files: fix comment typo in lib/functions/network.sh
Fix typo in comment.

Signed-off-by: Walter Sonius <walterav1984@gmail.com>
[commit title/message facelift]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-09-02 01:11:17 +02:00
Paul Spooren
c1875d1ebb build: switch VERSION_REPO to HTTPS
The variable VERSION_REPO is used by opkg to download package(list)s.
Now that the default installation support encrypted HTTP opkg should
make use of it.

Suggested-by: Petr Štetiar <ynezz@true.cz>
Suggested-by: Baptiste Jonglez <baptiste@bitsofnetworks.org>
Signed-off-by: Paul Spooren <mail@aparcar.org>
Acked-by: Baptiste Jonglez <baptiste@bitsofnetworks.org>
2020-08-31 11:26:10 +01:00
Adrian Schmutzler
7de3daa997 treewide: bump PKG_RELEASE after replacing which
Bump PKG_RELEASE for the affected packages as replacing "which" by
"command -v" represents a content change.

Fixes: 1fdf6b745c ("treewide: replace `which` with `command -v`")

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-08-12 11:17:22 +02:00
Paul Spooren
1fdf6b745c treewide: replace which with command -v
Fix shellcheck SC2230
> which is non-standard. Use builtin 'command -v' instead.

Using `command -v` is POSIX compliant while `which` is not.  Also to
mention, `command -v` is a shell builtin whereas `which` is a separate
busybox applet.

Once applied to everything concerning OpenWrt we can disable the busybox
feature `which` and save 3.8kB.

Acked-by: Stijn Tintel <stijn@linux-ipv6.be>
Signed-off-by: Paul Spooren <mail@aparcar.org>
[also replace cases in zram-swap]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-08-12 11:08:05 +02:00
Jo-Philipp Wich
4a6795409d base-files: functions.sh: fix config_get() on invalid identifiers
When passing a section or option value to config_get() which contains
characters that happen to be valid variable interpolation expressions,
the function returns a nonsensical expression result instead of the
expected empty string.

When the passed section or option name contains other characters which
are not valid within a shell variable name, a substitution error is
occuring instead.

The issue can be easily reproduced by one of the following examples:

    root@OpenWrt:~# . /lib/functions.sh
    root@OpenWrt:~# config load system
    root@OpenWrt:~# config_get variable invalid-section option
    root@OpenWrt:~# echo "$variable"
    section_option:-

    root@OpenWrt:~# . /lib/functions.sh
    root@OpenWrt:~# config load system
    root@OpenWrt:~# config_get variable section invalid-option
    root@OpenWrt:~# echo "$variable"
    option:-

    root@OpenWrt:~# . /lib/functions.sh
    root@OpenWrt:~# config load system
    root@OpenWrt:~# config_get variable section invalid@option
    -ash: eval: syntax error: bad substitution

Fix this issue by only performing interpolations when the given section
and option arguments are free of illegal characters.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-07 11:05:16 +02:00
Tony Ambardar
217877d046 base-files: mount bpffs at boot
Explicitly mount the BPF filesystem if available. This is used for pinning
eBPF programs and maps, making them accessible to other eBPF programs or
from userspace with the help of libbpf or bpftool.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
[daniel@makrotopia.org: bumped PKG_RELEASE]
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2020-07-31 13:43:03 +01:00
Adrian Schmutzler
02d6ac1060 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>
2020-07-31 11:40:15 +02:00