Lennart Poettering
1a95fc870a
So far our login in gpt-auto-generator when run in the initrd has been
to generate the units that wait for /dev/gpt-auto-root to show up and
mount them only if we have the loader partition EFI variables set. This
is of course not the case for network boots with a UKI kernel, which
means auto-gpt would not work for mounting the rootfs.
What's nasty is that we don't know for sure whether the "rootdisk"
loopback device will shown up eventually, as it needs explicit
configuration by the user via the kernel cmdline, or could be configured
entirely indepdenently. Hence, let's tweak the logic when we wat for
/dev/gpt-auto-root as device to mount: make the gpt auto root logic a
tristate: if root=gpt-auto is specified on the cmdline *definitely*
enable the logic. If root= is specified and set to anyting else,
*definitely* disable the logic. And if root= is not specified check for
the EFI partition vars – as before – to conditionalized things.
Or in other words, you can now boot the same image either via ESP/local
boot or via netboot with a kernelcmdline image like this:
rd.systemd.pull=verify=no,machine,blockdev,bootorigin,raw:rootdisk:image.raw root=gpt-auto rootflags=x-systemd.device-timeout=infinity ip=any
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