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418 lines
17 KiB
Scheme
418 lines
17 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2016 Mark H Weaver <mhw@netris.org>
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;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
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;;; Copyright © 2017, 2019 Mathieu Othacehe <m.othacehe@gmail.com>
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;;; Copyright © 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu system linux-initrd)
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#:use-module (guix gexp)
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#:use-module (guix utils)
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#:use-module ((guix store)
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#:select (%store-prefix))
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#:use-module ((guix derivations)
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#:select (derivation->output-path))
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#:use-module (guix modules)
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#:use-module (gnu packages compression)
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#:use-module (gnu packages disk)
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#:use-module (gnu packages linux)
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#:use-module (gnu packages file-systems)
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#:use-module (gnu packages guile)
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#:use-module ((gnu packages xorg)
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#:select (console-setup xkeyboard-config))
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#:use-module ((gnu packages make-bootstrap)
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#:select (%guile-static-stripped))
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#:use-module (gnu system file-systems)
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#:use-module (gnu system mapped-devices)
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#:use-module (gnu system keyboard)
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#:use-module (ice-9 match)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 vlist)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:export (expression->initrd
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%base-initrd-modules
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raw-initrd
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file-system-packages
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base-initrd))
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;;; Commentary:
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;;;
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;;; Tools to build initial RAM disks (initrd's) for Linux-Libre, and in
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;;; particular initrd's that run Guile.
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;;;
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;;; Code:
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(define* (expression->initrd exp
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#:key
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(guile %guile-static-stripped)
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(gzip gzip)
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(name "guile-initrd")
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(system (%current-system)))
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"Return as a file-like object a Linux initrd (a gzipped cpio archive)
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containing GUILE and that evaluates EXP, a G-expression, upon booting. All
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the derivations referenced by EXP are automatically copied to the initrd."
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;; General Linux overview in `Documentation/early-userspace/README' and
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;; `Documentation/filesystems/ramfs-rootfs-initramfs.txt'.
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(define init
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(program-file "init" exp #:guile guile))
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(define (import-module? module)
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;; Since we don't use deduplication support in 'populate-store', don't
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;; import (guix store deduplication) and its dependencies, which includes
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;; Guile-Gcrypt. That way we can run tests with '--bootstrap'.
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(and (guix-module-name? module)
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(not (equal? module '(guix store deduplication)))))
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(define builder
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;; Do not use "guile-zlib" extension here, otherwise it would drag the
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;; non-static "zlib" package to the initrd closure. It is not needed
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;; anyway because the modules are stored uncompressed within the initrd.
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(with-imported-modules (source-module-closure
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'((gnu build linux-initrd))
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#:select? import-module?)
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#~(begin
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(use-modules (gnu build linux-initrd))
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(mkdir #$output)
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;; The guile used in the initrd must be present in the store, so
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;; that module loading works once the root is switched.
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;;
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;; To ensure that is the case, add an explicit reference to the
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;; guile package used in the initrd to the output.
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;;
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;; This fixes guix-patches bug #28399, "Fix mysql activation, and
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;; add a basic test".
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(call-with-output-file (string-append #$ output "/references")
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(lambda (port)
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(simple-format port "~A\n" #$guile)))
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(build-initrd (string-append #$output "/initrd.cpio.gz")
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#:guile #$guile
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#:init #$init
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;; Copy everything INIT refers to into the initrd.
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#:references-graphs '("closure")
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#:gzip (string-append #+gzip "/bin/gzip")))))
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(file-append (computed-file name builder
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#:options
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`(#:references-graphs (("closure" ,init))))
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"/initrd.cpio.gz"))
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(define (flat-linux-module-directory linux modules)
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"Return a flat directory containing the Linux kernel modules listed in
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MODULES and taken from LINUX."
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(define imported-modules
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(source-module-closure '((gnu build linux-modules)
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(guix build utils))))
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(define build-exp
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(with-imported-modules imported-modules
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(with-extensions (list guile-zlib)
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#~(begin
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(use-modules (gnu build linux-modules)
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(guix build utils)
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(srfi srfi-1)
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(srfi srfi-26))
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(define module-dir
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(string-append #$linux "/lib/modules"))
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(define modules
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(let* ((lookup (cut find-module-file module-dir <>))
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(modules (map lookup '#$modules)))
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(append modules
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(recursive-module-dependencies
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modules
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#:lookup-module lookup))))
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(define (maybe-uncompress file)
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;; If FILE is a compressed module, uncompress it, as the initrd
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;; is already gzipped as a whole.
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(cond
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((string-contains file ".ko.gz")
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(invoke #+(file-append gzip "/bin/gunzip") file))))
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(mkdir #$output)
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(for-each (lambda (module)
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(let ((out-module
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(string-append #$output "/"
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(basename module))))
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(format #t "copying '~a'...~%" module)
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(copy-file module out-module)
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(maybe-uncompress out-module)))
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(delete-duplicates modules))
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;; Hyphen or underscore? This database tells us.
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(write-module-name-database #$output)))))
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(computed-file "linux-modules" build-exp))
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(define* (raw-initrd file-systems
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#:key
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(linux linux-libre)
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(linux-modules '())
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(mapped-devices '())
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(keyboard-layout #f)
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(helper-packages '())
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qemu-networking?
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volatile-root?
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(on-error 'debug))
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"Return as a file-like object a raw initrd, with kernel
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modules taken from LINUX. FILE-SYSTEMS is a list of file-systems to be
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mounted by the initrd, possibly in addition to the root file system specified
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on the kernel command line via '--root'. LINUX-MODULES is a list of kernel
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modules to be loaded at boot time. MAPPED-DEVICES is a list of device
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mappings to realize before FILE-SYSTEMS are mounted.
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HELPER-PACKAGES is a list of packages to be copied in the initrd. It may include
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e2fsck/static or other packages needed by the initrd to check root partition.
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When true, KEYBOARD-LAYOUT is a <keyboard-layout> record denoting the desired
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console keyboard layout. This is done before MAPPED-DEVICES are set up and
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before FILE-SYSTEMS are mounted such that, should the user need to enter a
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passphrase or use the REPL, this happens using the intended keyboard layout.
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When QEMU-NETWORKING? is true, set up networking with the standard QEMU
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parameters.
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When VOLATILE-ROOT? is true, the root file system is writable but any changes
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to it are lost.
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ON-ERROR is passed to 'call-with-error-handling'; it determines what happens
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upon error."
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(define device-mapping-commands
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;; List of gexps to open the mapped devices.
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(map (lambda (md)
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(let* ((source (mapped-device-source md))
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(targets (mapped-device-targets md))
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(type (mapped-device-type md))
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(open (mapped-device-kind-open type)))
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(open source targets)))
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mapped-devices))
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(define file-system-scan-commands
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;; File systems like btrfs need help to assemble multi-device file systems
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;; but do not use manually-specified <mapped-devices>.
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(let ((file-system-types (map file-system-type file-systems)))
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(if (member "btrfs" file-system-types)
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;; Ignore errors: if the system manages to boot anyway, the better.
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#~((system* (string-append #$btrfs-progs/static "/bin/btrfs")
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"device" "scan"))
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#~())))
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(define kodir
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(flat-linux-module-directory linux linux-modules))
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(expression->initrd
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(with-imported-modules (source-module-closure
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'((gnu build linux-boot)
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(guix build utils)
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(guix build bournish)
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(gnu system file-systems)
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(gnu build file-systems)))
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#~(begin
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(use-modules (gnu build linux-boot)
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(gnu system file-systems)
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((guix build utils) #:hide (delete))
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(guix build bournish) ;add the 'bournish' meta-command
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(srfi srfi-1) ;for lvm-device-mapping
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(srfi srfi-26)
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;; FIXME: The following modules are for
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;; LUKS-DEVICE-MAPPING. We should instead propagate
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;; this info via gexps.
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((gnu build file-systems)
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#:select (find-partition-by-luks-uuid))
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(rnrs bytevectors))
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(with-output-to-port (%make-void-port "w")
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(lambda ()
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(set-path-environment-variable "PATH" '("bin" "sbin")
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'#$helper-packages)))
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(parameterize ((current-warning-port (%make-void-port "w")))
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(boot-system #:mounts
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(map spec->file-system
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'#$(map file-system->spec file-systems))
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#:pre-mount (lambda ()
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(and #$@device-mapping-commands
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#$@file-system-scan-commands))
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#:linux-modules '#$linux-modules
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#:linux-module-directory '#$kodir
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#:keymap-file #+(and=> keyboard-layout
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keyboard-layout->console-keymap)
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#:qemu-guest-networking? #$qemu-networking?
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#:volatile-root? '#$volatile-root?
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#:on-error '#$on-error))))
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#:name "raw-initrd"))
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(define* (file-system-packages file-systems #:key (volatile-root? #f))
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"Return the list of statically-linked, stripped packages to check
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FILE-SYSTEMS."
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`(,@(if (find (lambda (fs)
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(string-prefix? "ext" (file-system-type fs)))
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file-systems)
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(list e2fsck/static)
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'())
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,@(if (find (lambda (fs)
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(string-suffix? "fat" (file-system-type fs)))
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file-systems)
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(list fatfsck/static)
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'())
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,@(if (find (file-system-type-predicate "bcachefs") file-systems)
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(list bcachefs/static)
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'())
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,@(if (find (file-system-type-predicate "btrfs") file-systems)
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(list btrfs-progs/static)
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'())
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,@(if (find (file-system-type-predicate "jfs") file-systems)
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(list jfs_fsck/static)
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'())
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,@(if (find (file-system-type-predicate "ntfs") file-systems)
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(list ntfsfix/static)
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'())
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,@(if (find (file-system-type-predicate "f2fs") file-systems)
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(list f2fs-fsck/static)
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'())
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,@(if (find (file-system-type-predicate "xfs") file-systems)
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(list xfs_repair/static)
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'())))
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(define-syntax vhash ;TODO: factorize
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(syntax-rules (=>)
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"Build a vhash with the given key/value mappings."
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((_)
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vlist-null)
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((_ (key others ... => value) rest ...)
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(vhash-cons key value
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(vhash (others ... => value) rest ...)))
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((_ (=> value) rest ...)
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(vhash rest ...))))
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(define-syntax lookup-procedure
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(syntax-rules (else)
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"Return a procedure that lookups keys in the given dictionary."
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((_ mapping ... (else default))
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(let ((table (vhash mapping ...)))
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(lambda (key)
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(match (vhash-assoc key table)
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(#f default)
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((key . value) value)))))))
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(define file-system-type-modules
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;; Given a file system type, return the list of modules it needs.
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(lookup-procedure ("cifs" => '("md4" "ecb" "cifs"))
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("9p" => '("9p" "9pnet_virtio"))
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("bcachefs" => '("bcachefs"))
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("btrfs" => '("btrfs"))
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("iso9660" => '("isofs"))
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("jfs" => '("jfs"))
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("f2fs" => '("f2fs" "crc32_generic"))
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("xfs" => '("xfs"))
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(else '())))
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(define (file-system-modules file-systems)
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"Return the list of Linux modules needed to mount FILE-SYSTEMS."
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(append-map (compose file-system-type-modules file-system-type)
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file-systems))
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(define* (default-initrd-modules
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#:optional
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(system (or (%current-target-system)
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(%current-system))))
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"Return the list of modules included in the initrd by default."
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(define virtio-modules
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;; Modules for Linux para-virtualized devices, for use in QEMU guests.
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'("virtio_pci" "virtio_balloon" "virtio_blk" "virtio_net"
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"virtio_console" "virtio-rng"))
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`("ahci" ;for SATA controllers
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"usb-storage" "uas" ;for the installation image etc.
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"usbhid" "hid-generic" "hid-apple" ;keyboards during early boot
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"dm-crypt" "xts" "serpent_generic" "wp512" ;for encrypted root partitions
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"nls_iso8859-1" ;for `mkfs.fat`, et.al
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,@(if (string-match "^(x86_64|i[3-6]86)-" system)
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'("pata_acpi" "pata_atiixp" ;for ATA controllers
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"isci") ;for SAS controllers like Intel C602
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'())
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,@virtio-modules))
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(define-syntax %base-initrd-modules
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;; This more closely matches our naming convention.
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(identifier-syntax (default-initrd-modules)))
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(define* (base-initrd file-systems
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#:key
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(linux linux-libre)
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(linux-modules '())
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(mapped-devices '())
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(keyboard-layout #f)
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qemu-networking?
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volatile-root?
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(extra-modules '()) ;deprecated
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(on-error 'debug))
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"Return as a file-like object a generic initrd, with kernel
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modules taken from LINUX. FILE-SYSTEMS is a list of file-systems to be
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mounted by the initrd, possibly in addition to the root file system specified
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on the kernel command line via '--root'. MAPPED-DEVICES is a list of device
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mappings to realize before FILE-SYSTEMS are mounted.
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When true, KEYBOARD-LAYOUT is a <keyboard-layout> record denoting the desired
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console keyboard layout. This is done before MAPPED-DEVICES are set up and
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before FILE-SYSTEMS are mounted such that, should the user need to enter a
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passphrase or use the REPL, this happens using the intended keyboard layout.
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QEMU-NETWORKING? and VOLATILE-ROOT? behaves as in raw-initrd.
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The initrd is automatically populated with all the kernel modules necessary
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for FILE-SYSTEMS and for the given options. Additional kernel
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modules can be listed in LINUX-MODULES. They will be added to the initrd, and
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loaded at boot time in the order in which they appear."
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(define linux-modules*
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;; Modules added to the initrd and loaded from the initrd.
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`(,@linux-modules
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,@(file-system-modules file-systems)
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,@(if volatile-root?
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'("overlay")
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'())
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,@extra-modules))
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(define helper-packages
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(append (file-system-packages file-systems
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#:volatile-root? volatile-root?)
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(if keyboard-layout
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(list loadkeys-static)
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'())))
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(raw-initrd file-systems
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#:linux linux
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#:linux-modules linux-modules*
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#:mapped-devices mapped-devices
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#:helper-packages helper-packages
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#:keyboard-layout keyboard-layout
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#:qemu-networking? qemu-networking?
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#:volatile-root? volatile-root?
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#:on-error on-error))
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;;; linux-initrd.scm ends here
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