By referencing guile from the initrd output explicitly, it will be present in the store when this initrd is used. If the exact guile used within the initrd isn't present in the store, then after root is switched during the boot process, loading modules (such as (ice-9 popen)) won't work. This fixes guix-patches bug #28399, "Fix mysql activation, and add a basic test". * gnu/system/linux-initrd.scm (expression->initrd)[builder]: Write out a file called references in to the initrd output, which includes the store path for guile.
323 lines
13 KiB
Scheme
323 lines
13 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015, 2016, 2017 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 Mathieu Othacehe <m.othacehe@gmail.com>
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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 monads)
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#:use-module (guix store)
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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 guile)
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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 (ice-9 match)
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#:use-module (ice-9 regex)
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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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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 a derivation that builds 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 builder
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(with-imported-modules (source-module-closure
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'((gnu build linux-initrd)))
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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")
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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 #$gzip "/bin/gzip")))))
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(gexp->derivation name builder
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#:references-graphs `(("closure" ,init))))
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(define (flat-linux-module-directory linux modules)
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"Return a flat directory containing the Linux kernel modules listed in
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MODULES and taken from LINUX."
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(define build-exp
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(with-imported-modules (source-module-closure
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'((guix build utils)
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(gnu build linux-modules)))
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#~(begin
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(use-modules (ice-9 match) (ice-9 regex)
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(srfi srfi-1)
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(guix build utils)
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(gnu build linux-modules))
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(define (string->regexp str)
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;; Return a regexp that matches STR exactly.
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(string-append "^" (regexp-quote str) "$"))
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(define module-dir
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(string-append #$linux "/lib/modules"))
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(define (lookup module)
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(let ((name (ensure-dot-ko module)))
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(match (find-files module-dir (string->regexp name))
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((file)
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file)
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(()
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(error "module not found" name module-dir))
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((_ ...)
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(error "several modules by that name"
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name module-dir)))))
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(define modules
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(let ((modules (map lookup '#$modules)))
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(append modules
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(recursive-module-dependencies modules
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#:lookup-module lookup))))
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(mkdir #$output)
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(for-each (lambda (module)
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(format #t "copying '~a'...~%" module)
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(copy-file module
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(string-append #$output "/"
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(basename module))))
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(delete-duplicates modules)))))
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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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(helper-packages '())
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qemu-networking?
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volatile-root?)
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"Return a monadic derivation that builds 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 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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(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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(target (mapped-device-target 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 target)))
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mapped-devices))
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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 build file-systems)))
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#~(begin
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(use-modules (gnu build linux-boot)
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(guix build utils)
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(guix build bournish) ;add the 'bournish' meta-command
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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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'#$helper-packages)))
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(boot-system #:mounts '#$(map file-system->spec file-systems)
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#:pre-mount (lambda ()
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(and #$@device-mapping-commands))
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#:linux-modules '#$linux-modules
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#:linux-module-directory '#$kodir
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#:qemu-guest-networking? #$qemu-networking?
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#:volatile-root? '#$volatile-root?)))
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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 "btrfs") file-systems)
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(list btrfs-progs/static)
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'())
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,@(if volatile-root?
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(list unionfs-fuse/static)
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'())))
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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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(mapped-devices '())
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qemu-networking?
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volatile-root?
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(virtio? #t)
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(extra-modules '()))
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"Return a monadic derivation that builds 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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QEMU-NETWORKING? and VOLATILE-ROOT? behaves as in raw-initrd.
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When VIRTIO? is true, load additional modules so the initrd can
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be used as a QEMU guest with the root file system on a para-virtualized block
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device.
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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. However, additional kernel
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modules can be listed in EXTRA-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 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"))
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(define cifs-modules
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;; Modules needed to mount CIFS file systems.
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'("md4" "ecb" "cifs"))
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(define virtio-9p-modules
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;; Modules for the 9p paravirtualized file system.
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'("9p" "9pnet_virtio"))
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(define (file-system-type-predicate type)
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(lambda (fs)
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(string=? (file-system-type fs) type)))
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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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`("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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"nvme" ;for new SSD NVMe devices
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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)-" (%current-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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,@(if (or virtio? qemu-networking?)
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virtio-modules
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'())
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,@(if (find (file-system-type-predicate "cifs") file-systems)
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cifs-modules
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'())
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,@(if (find (file-system-type-predicate "9p") file-systems)
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virtio-9p-modules
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'())
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,@(if (find (file-system-type-predicate "btrfs") file-systems)
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'("btrfs")
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'())
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,@(if (find (file-system-type-predicate "iso9660") file-systems)
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'("isofs")
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'())
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,@(if volatile-root?
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'("fuse")
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'())
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,@extra-modules))
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(define helper-packages
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(file-system-packages file-systems #:volatile-root? volatile-root?))
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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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#:qemu-networking? qemu-networking?
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#:volatile-root? volatile-root?))
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;;; linux-initrd.scm ends here
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