91 lines
2.3 KiB
Nix
91 lines
2.3 KiB
Nix
{
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config
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, pkgs
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, lib
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, ...
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}:
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let
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inherit (pkgs) liminix;
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inherit (lib) mkIf mkOption types concatStringsSep optionalString;
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in
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{
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imports = [
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./initramfs.nix
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./ubifs.nix
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];
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options.hardware.ubi = {
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minIOSize = mkOption { type = types.str; };
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eraseBlockSize = mkOption { type = types.str; }; # LEB
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maxLEBcount = mkOption { type = types.str; }; # LEB
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};
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config = mkIf (config.rootfsType == "ubifs") {
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kernel.config = {
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MTD_UBI="y";
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UBIFS_FS = "y";
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UBIFS_FS_SECURITY = "n";
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};
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boot.initramfs.enable = true;
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system.outputs.rootfs =
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let
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inherit (pkgs.pkgsBuildBuild) runCommand;
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ubiVolume = ({ name, volumeId, image, flags ? [] }:
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''
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[${name}]
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mode=ubi
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vol_id=${toString volumeId}
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vol_type=dynamic
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vol_name=${name}
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vol_alignment=1
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${optionalString (image != null) ''
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image=${image}
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''}
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${optionalString (image == null) ''
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vol_size=1MiB
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''}
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${optionalString (flags != []) ''
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vol_flags=${concatStringsSep "," flags}
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''}
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'');
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ubiImage = (volumes:
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let
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ubinizeConfig = pkgs.writeText "ubinize.conf" (concatStringsSep "\n" volumes);
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inherit (pkgs.pkgsBuildBuild) mtdutils;
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in
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runCommand "ubinize" {
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depsBuildBuild = [ mtdutils ];
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# block size := 128kb
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# page size := 2048
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# ubninize opts := -E 5
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} ''
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ubinize -Q "$SOURCE_DATE_EPOCH" -o $out \
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-p ${config.hardware.ubi.physicalEraseBlockSize} -m ${config.hardware.ubi.minIOSize} \
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-e ${config.hardware.ubi.logicalEraseBlockSize} \
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${ubinizeConfig}
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'');
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ubiDisk = ({ initramfs }:
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let
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initramfsUbi = ubiVolume {
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name = "rootfs";
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volumeId = 0;
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image = initramfs;
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flags = [ "autoresize" ];
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};
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in
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ubiImage [
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initramfsUbi
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]);
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disk = ubiDisk {
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initramfs = config.system.outputs.rootubifs; # liminix.builders.squashfs config.filesystem.contents; # # assert this is a proper FIT.
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};
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in
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disk;
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};
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}
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