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tftp: introduce an alternative command line for TFTP

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Normal command line and TFTP command line can be sometimes very
different.

e.g. We don't want to load UBI filesystems for a TFTP boot as it may
interfere with our root device loading.

Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
This commit is contained in:
Raito Bezarius 2024-08-26 17:53:08 +02:00 • committed by Ryan Lahfa
parent 2d6414ea41
commit 86e81efbd6
4 changed files with 25 additions and 1 deletions
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10
modules/outputs/tftpboot.nix
View file

@ -28,6 +28,14 @@ in {
type = types.bool;
default = false;
};
commandLine = mkOption {
type = types.listOf types.str;
default = config.boot.commandLine;
description = ''
TFTP-specific command line.
Defaults to the classical one if unset.
'';
};
};
options.system.outputs = {
tftpboot = mkOption {
@ -105,7 +113,7 @@ in {
zimage = "bootz";
}; in choices.${cfg.kernelFormat};
cmdline = concatStringsSep " " config.boot.commandLine;
cmdline = concatStringsSep " " config.boot.tftp.commandLine;
objcopy = "${pkgs.stdenv.cc.bintools.targetPrefix}objcopy";
stripAndZip = ''
${objcopy} -O binary -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id -S vmlinux.elf vmlinux.bin

7
modules/outputs/ubivolume.nix
View file

@ -29,6 +29,13 @@ in
};
boot.initramfs.enable = true;
# In TFTP, the device named "rootfs" is the UBI device.
# We tell the kernel to load it.
# This avoids interference from the other UBI volumes.
boot.tftp.commandLine = [
"ubi.mtd=rootfs"
];
system.outputs.rootfs =
let
inherit (pkgs.pkgsBuildBuild) runCommand;