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| author | Bastian Krause <bst@pengutronix.de> | 2019-09-27 11:59:54 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-09-30 20:39:04 +0200 |
| commit | fbf03e24b9111aea4a11fea1ac67fee446ad2c63 (patch) | |
| tree | e06a10a94e6fb44637144fd32b15b08aa8308ec2 /include | |
| parent | b0ac975d9277b06081b5eff1a49d5bec19a64684 (diff) | |
| download | barebox-fbf03e24b9111aea4a11fea1ac67fee446ad2c63.tar.gz barebox-fbf03e24b9111aea4a11fea1ac67fee446ad2c63.tar.xz | |
bootm: allow providing machine id to Kernel
By default systemd generates a machine id on first boot and tries to
persist it (see `man machine-id`). When the root file system is read-only
systemd cannot persist the machine id. In case multiple redundant slots
are used the machine id will vary. When not handled explicitly the
machine id will also change during system updates.
It is possible to pass a machine id to the kernel which will be used by
systemd (systemd.machine_id=).
If global.bootm.provide_machine_id (or nv.bootm.provide_machine_id) is
true then provide the machine id from global.machine_id as
systemd.machine_id= parameter to the Kernel.
Note that global.machine_id must be set, either by the
machine_id_set_bootarg late init call or by setting it manually with
nv.machine_id if necessary.
Signed-off-by: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/bootm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/bootm.h b/include/bootm.h index 5ce3318ecc..a041aa35b9 100644 --- a/include/bootm.h +++ b/include/bootm.h @@ -26,6 +26,11 @@ struct bootm_data { * mount the rootfs from the same device as the Kernel comes from. */ bool appendroot; + /* + * provide_machine_id - if true, try to add systemd.machine_id= with + * value of global.machine_id to Kernel. + */ + bool provide_machine_id; unsigned long initrd_address; unsigned long os_address; unsigned long os_entry; |