support jffs2, with initramfs
the jffs2 filesystem contains only /nix/store and a script which is run in early init (initramfs) and is responsible for recreating "traditional" directories (/bin /etc/**/* /var &c) based on the configuration. this is tested only in qemu so far and could use some cleanupmodule-based-network
parent
25d9da967c
commit
54a1ab3529
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@ -0,0 +1,79 @@
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{
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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 (lib) mkOption types concatStringsSep;
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inherit (pkgs) runCommand callPackage writeText;
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in
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{
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config = {
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kernel.config.BLK_DEV_INITRD = "y";
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outputs = {
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initramfs =
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let
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bb = pkgs.busybox.override {
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enableStatic = true;
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enableMinimal = true;
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enableAppletSymlinks = false;
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extraConfig = ''
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CONFIG_ASH y
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CONFIG_LS y
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CONFIG_LN y
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CONFIG_CAT y
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CONFIG_MOUNT y
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CONFIG_PRINTF y
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CONFIG_FEATURE_MOUNT_FLAGS y
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CONFIG_FEATURE_MOUNT_VERBOSE y
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CONFIG_ECHO y
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CONFIG_CHROOT y
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CONFIG_CHMOD y
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CONFIG_MKDIR y
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CONFIG_MKNOD y
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CONFIG_SH_IS_ASH y
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CONFIG_BASH_IS_NONE y
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'';
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};
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slashinit = pkgs.writeScript "init" ''
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#!/bin/sh
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exec >/dev/console
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echo IT MOVES
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mount -t proc none /proc
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mount -t jffs2 mtd0 /target/persist
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mount -o bind /target/persist/nix /target/nix
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sh /target/persist/activate /target
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cd /target
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mount -o bind /target /
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exec chroot . /bin/init "$@"
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'';
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refs = pkgs.writeReferencesToFile bb;
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gen_init_cpio = pkgs.pkgsBuildBuild.gen_init_cpio;
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in runCommand "initramfs" {} ''
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cat << SPECIALS | ${gen_init_cpio}/bin/gen_init_cpio /dev/stdin > $out
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dir /proc 0755 0 0
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dir /dev 0755 0 0
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nod /dev/mtdblock0 0600 0 0 b 31 0
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dir /target 0755 0 0
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dir /target/persist 0755 0 0
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dir /target/nix 0755 0 0
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nod /dev/console 0600 0 0 c 5 1
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dir /bin 0755 0 0
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file /bin/busybox ${bb}/bin/busybox 0755 0 0
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slink /bin/sh /bin/busybox 0755 0 0
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slink /bin/echo /bin/busybox 0755 0 0
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slink /bin/mount /bin/busybox 0755 0 0
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slink /bin/chroot /bin/busybox 0755 0 0
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slink /bin/chmod /bin/busybox 0755 0 0
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slink /bin/ln /bin/busybox 0755 0 0
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slink /bin/mkdir /bin/busybox 0755 0 0
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slink /bin/mknod /bin/busybox 0755 0 0
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slink /bin/printf /bin/busybox 0755 0 0
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file /init ${slashinit} 0755 0 0
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SPECIALS
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'';
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};
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};
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}
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{
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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 (lib) mkOption types concatStringsSep;
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inherit (pkgs) liminix callPackage writeText closureInfo;
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in
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{
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imports = [
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./initramfs.nix
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];
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config = {
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kernel.config.JFFS2_FS = "y";
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outputs = rec {
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systemConfiguration =
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let inherit (pkgs.pkgsBuildBuild) systemconfig;
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in systemconfig config.filesystem.contents;
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jffs2fs =
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let
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inherit (pkgs.pkgsBuildBuild) runCommand systemconfig mtdutils;
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sysconf = systemConfiguration;
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in runCommand "make-jffs2" {
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depsBuildBuild = [ mtdutils ];
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} ''
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mkdir -p $TMPDIR/empty/nix/store/
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cp ${sysconf}/activate $TMPDIR/empty/activate
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pkgClosure=${closureInfo { rootPaths = [ sysconf ]; }}
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cp $pkgClosure/registration nix-path-registration
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grafts=$(sed < $pkgClosure/store-paths 's/^\(.*\)$/--graft \1:\1/g')
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mkfs.jffs2 --pad --big-endian --root $TMPDIR/empty --output $out $grafts --verbose
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'';
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jffs2boot =
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let o = config.outputs; in
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pkgs.runCommand "jffs2boot" {} ''
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mkdir $out
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cd $out
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ln -s ${o.jffs2fs} rootfs
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ln -s ${o.kernel} vmlinux
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ln -s ${o.manifest} manifest
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ln -s ${o.initramfs} initramfs
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'';
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};
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};
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}
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@ -12,6 +12,7 @@
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};
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};
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writeAshScript = callPackage ./write-ash-script {};
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systemconfig = callPackage ./systemconfig {};
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s6-init-bin = callPackage ./s6-init-bin {};
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s6-rc-database = callPackage ./s6-rc-database {};
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mips-vm = callPackage ./mips-vm {};
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@ -1,7 +1,13 @@
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#!/usr/bin/env bash
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cleanup(){
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test -n "$rootfs" && test -f $rootfs && rm $rootfs
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}
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trap 'exit 1' INT HUP QUIT TERM ALRM USR1
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trap 'cleanup' EXIT
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usage(){
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echo "usage: $(basename $0) [--background /path/to/state_directory] kernel rootimg"
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echo "usage: $(basename $0) [--background /path/to/state_directory] kernel rootimg [initramfs]"
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echo -e "\nWithout --background, use C-p c (not C-a c) to switch to the monitor"
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exit 1
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}
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@ -23,14 +29,22 @@ fi
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test -n "$2" || usage
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rootfs=$(mktemp mips-vm-fs-XXXXXX)
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dd if=$2 of=$rootfs bs=65536 conv=sync
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if test -n "$3"; then
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initramfs="-initrd $3"
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fi
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INIT=${INIT-/bin/init}
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echo $QEMU_OPTIONS
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qemu-system-mips \
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-M malta -m 256 \
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-echr 16 \
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-append "liminix default console=ttyS0,38400n8 panic=10 oops=panic init=$INIT loglevel=8 root=/dev/mtdblock0 block2mtd.block2mtd=/dev/vda,4096" \
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-drive file=$2,format=raw,readonly=on,if=virtio \
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-append "liminix default console=ttyS0,38400n8 panic=10 oops=panic init=$INIT loglevel=8 root=/dev/mtdblock0 block2mtd.block2mtd=/dev/vda,65536" \
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-drive file=$rootfs,format=raw,readonly=on,if=virtio \
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${initramfs} \
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-netdev socket,id=access,mcast=230.0.0.1:1234,localaddr=127.0.0.1 \
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-device virtio-net-pci,disable-legacy=on,disable-modern=off,netdev=access,mac=ba:ad:1d:ea:21:02 \
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-netdev socket,id=lan,mcast=230.0.0.1:1235,localaddr=127.0.0.1 \
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@ -0,0 +1,60 @@
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# The ideal is that a Liminix system can boot with only the files in
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# /nix/store. This package generates a script that is run at early
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# boot (from the initramfs) to populate directories such as /etc,
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# /bin, /home according to whatever the configuration says
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# they should contain
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{
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writeText
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, runCommand
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, lib
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}:
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let
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inherit (lib.attrsets) mapAttrsToList;
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escaped = msg : builtins.replaceStrings
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["\n" "=" "\"" "$" ]
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["\\x0a" "\\x3d" "\\x22" "\\x24"]
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msg;
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visit = prefix: attrset:
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let makeFile = prefix : filename: {
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type ? "f"
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, mode ? null
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, target ? null
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, contents ? null
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, file ? null
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, major ? null
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, minor ? null
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}:
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let
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pathname = "${prefix}/${filename}";
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chmod =
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let m = if mode != null then mode else
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(if type == "d" then "0755" else "0644");
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in (if type == "s"
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then ""
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else "\nchmod ${m} ${pathname}");
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cmds = {
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"f" = "printf \"${escaped file}\" > ${pathname}";
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"d" = "mkdir ${pathname}\n" +
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(builtins.concatStringsSep "\n"
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(visit pathname contents));
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"c" = "mknod ${pathname} c ${major} ${minor}";
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"b" = "mknod ${pathname} b ${major} ${minor}";
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"s" = "ln -s ${target} ${pathname}";
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"l" = "ln ${target} ${pathname}";
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"i" = "mknod ${pathname} p";
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};
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cmd = cmds.${type};
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in "${cmd}${chmod}";
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in mapAttrsToList (makeFile prefix) attrset;
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activateScript = attrset: writeText "systemConfig" ''
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#!/bin/sh
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t=$1
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${(builtins.concatStringsSep "\n" (visit "$t" attrset))}
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'';
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in attrset:
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runCommand "make-stuff" {} ''
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mkdir -p $out
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ln -s ${activateScript attrset} $out/activate
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''
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Loading…
Reference in New Issue