0793833c59
It is now up to the caller to deduplicate store contents. * guix/store/database.scm (register-items): Remove #:deduplicate? parameter and call to 'deduplicate'. (register-path): Call 'deduplicate' when #:deduplicate? is true. * gnu/build/image.scm (register-closure): Adjust call accordingly. * gnu/build/vm.scm (register-closure): Likewise. * guix/nar.scm (finalize-store-file): Likewise. * guix/scripts/pack.scm (store-database): Likewise.
501 lines
19 KiB
Scheme
501 lines
19 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
|
||
;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org>
|
||
;;; Copyright © 2016, 2017 Leo Famulari <leo@famulari.name>
|
||
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
|
||
;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com>
|
||
;;; Copyright © 2018 Chris Marusich <cmmarusich@gmail.com>
|
||
;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr>
|
||
;;;
|
||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||
;;; under the terms of the GNU General Public License as published by
|
||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||
;;; your option) any later version.
|
||
;;;
|
||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;; GNU General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (gnu build vm)
|
||
#:use-module (guix build utils)
|
||
#:use-module (guix build store-copy)
|
||
#:use-module (guix build syscalls)
|
||
#:use-module (guix store database)
|
||
#:use-module (gnu build bootloader)
|
||
#:use-module (gnu build linux-boot)
|
||
#:use-module (gnu build install)
|
||
#:use-module (gnu system uuid)
|
||
#:use-module (guix records)
|
||
#:use-module ((guix combinators) #:select (fold2))
|
||
#:use-module (ice-9 format)
|
||
#:use-module (ice-9 ftw)
|
||
#:use-module (ice-9 match)
|
||
#:use-module (ice-9 regex)
|
||
#:use-module (ice-9 popen)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-9)
|
||
#:use-module (srfi srfi-19)
|
||
#:use-module (srfi srfi-26)
|
||
#:export (qemu-command
|
||
load-in-linux-vm
|
||
format-partition
|
||
|
||
partition
|
||
partition?
|
||
partition-device
|
||
partition-size
|
||
partition-file-system
|
||
partition-label
|
||
partition-flags
|
||
partition-initializer
|
||
|
||
estimated-partition-size
|
||
root-partition-initializer
|
||
initialize-partition-table
|
||
initialize-hard-disk))
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; This module provides supporting code to run virtual machines and build
|
||
;;; virtual machine images using QEMU.
|
||
;;;
|
||
;;; Code:
|
||
|
||
(define* (qemu-command #:optional (system %host-type))
|
||
"Return the default name of the QEMU command for SYSTEM."
|
||
(let ((cpu (substring system 0
|
||
(string-index system #\-))))
|
||
(string-append "qemu-system-"
|
||
(cond
|
||
((string-match "^i[3456]86$" cpu) "i386")
|
||
((string-match "armhf" cpu) "arm")
|
||
(else cpu)))))
|
||
|
||
(define* (load-in-linux-vm builder
|
||
#:key
|
||
output
|
||
(qemu (qemu-command)) (memory-size 512)
|
||
linux initrd
|
||
make-disk-image?
|
||
single-file-output?
|
||
(disk-image-size (* 100 (expt 2 20)))
|
||
(disk-image-format "qcow2")
|
||
(references-graphs '()))
|
||
"Run BUILDER, a Scheme file, into a VM running LINUX with INITRD, and copy
|
||
the result to OUTPUT. If SINGLE-FILE-OUTPUT? is true, copy a single file from
|
||
/xchg to OUTPUT. Otherwise, copy the contents of /xchg to a new directory
|
||
OUTPUT.
|
||
|
||
When MAKE-DISK-IMAGE? is true, OUTPUT will contain a VM image of
|
||
DISK-IMAGE-SIZE bytes resulting from the execution of BUILDER, which may
|
||
access it via /dev/hda.
|
||
|
||
REFERENCES-GRAPHS can specify a list of reference-graph files as produced by
|
||
the #:references-graphs parameter of 'derivation'."
|
||
|
||
(define target-arm32?
|
||
(string-prefix? "arm-" %host-type))
|
||
|
||
(define target-aarch64?
|
||
(string-prefix? "aarch64-" %host-type))
|
||
|
||
(define target-arm?
|
||
(or target-arm32? target-aarch64?))
|
||
|
||
(define arch-specific-flags
|
||
`(;; On ARM, a machine has to be specified. Use "virt" machine to avoid
|
||
;; hardware limits imposed by other machines.
|
||
,@(if target-arm?
|
||
'("-M" "virt")
|
||
'())
|
||
|
||
;; On ARM32, if the kernel is built without LPAE support, ECAM conflicts
|
||
;; with VIRT_PCIE_MMIO causing PCI devices not to show up. Disable
|
||
;; explicitely highmem to fix it.
|
||
;; See: https://bugs.launchpad.net/qemu/+bug/1790975.
|
||
,@(if target-arm32?
|
||
'("-machine" "highmem=off")
|
||
'())
|
||
|
||
;; Only enable kvm if we see /dev/kvm exists. This allows users without
|
||
;; hardware virtualization to still use these commands. KVM support is
|
||
;; still buggy on some ARM boards. Do not use it even if available.
|
||
,@(if (and (file-exists? "/dev/kvm")
|
||
(not target-arm?))
|
||
'("-enable-kvm")
|
||
'())
|
||
|
||
;; Pass "panic=1" so that the guest dies upon error.
|
||
"-append"
|
||
,(string-append "panic=1 --load=" builder
|
||
|
||
;; The serial port name differs between emulated
|
||
;; architectures/machines.
|
||
" console="
|
||
(if target-arm? "ttyAMA0" "ttyS0"))))
|
||
|
||
(when make-disk-image?
|
||
(format #t "creating ~a image of ~,2f MiB...~%"
|
||
disk-image-format (/ disk-image-size (expt 2 20)))
|
||
(force-output)
|
||
(invoke "qemu-img" "create" "-f" disk-image-format output
|
||
(number->string disk-image-size)))
|
||
|
||
(mkdir "xchg")
|
||
(mkdir "tmp")
|
||
|
||
(match references-graphs
|
||
((graph-files ...)
|
||
;; Copy the reference-graph files under xchg/ so EXP can access it.
|
||
(map (lambda (file)
|
||
(copy-file file (string-append "xchg/" file)))
|
||
graph-files))
|
||
(_ #f))
|
||
|
||
(apply invoke qemu "-nographic" "-no-reboot"
|
||
;; CPU "max" behaves as "host" when KVM is enabled, and like a system
|
||
;; CPU with the maximum possible feature set otherwise.
|
||
"-cpu" "max"
|
||
"-m" (number->string memory-size)
|
||
"-nic" "user,model=virtio-net-pci"
|
||
"-object" "rng-random,filename=/dev/urandom,id=guixsd-vm-rng"
|
||
"-device" "virtio-rng-pci,rng=guixsd-vm-rng"
|
||
"-virtfs"
|
||
(string-append "local,id=store_dev,path="
|
||
(%store-directory)
|
||
",security_model=none,mount_tag=store")
|
||
"-virtfs"
|
||
(string-append "local,id=xchg_dev,path=xchg"
|
||
",security_model=none,mount_tag=xchg")
|
||
"-virtfs"
|
||
;; Some programs require more space in /tmp than is normally
|
||
;; available in the guest. Accommodate such programs by sharing a
|
||
;; temporary directory.
|
||
(string-append "local,id=tmp_dev,path=tmp"
|
||
",security_model=none,mount_tag=tmp")
|
||
"-kernel" linux
|
||
"-initrd" initrd
|
||
(append
|
||
(if make-disk-image?
|
||
`("-device" "virtio-blk,drive=myhd"
|
||
"-drive" ,(string-append "if=none,file=" output
|
||
",format=" disk-image-format
|
||
",id=myhd"))
|
||
'())
|
||
arch-specific-flags))
|
||
|
||
(unless (file-exists? "xchg/.exit-status")
|
||
(error "VM did not produce an exit code"))
|
||
|
||
(match (call-with-input-file "xchg/.exit-status" read)
|
||
(0 #t)
|
||
(status (error "guest VM code exited with a non-zero status" status)))
|
||
|
||
(delete-file "xchg/.exit-status")
|
||
|
||
;; When MAKE-DISK-IMAGE? is true, the image is in OUTPUT already.
|
||
(unless make-disk-image?
|
||
(if single-file-output?
|
||
(let ((graph? (lambda (name stat)
|
||
(member (basename name) references-graphs))))
|
||
(match (find-files "xchg" (negate graph?))
|
||
((result)
|
||
(copy-file result output))
|
||
(x
|
||
(error "did not find a single result file" x))))
|
||
(begin
|
||
(mkdir output)
|
||
(copy-recursively "xchg" output)))))
|
||
|
||
(define* (register-closure prefix closure
|
||
#:key
|
||
(schema (sql-schema)))
|
||
"Register CLOSURE in PREFIX, where PREFIX is the directory name of the
|
||
target store and CLOSURE is the name of a file containing a reference graph as
|
||
produced by #:references-graphs."
|
||
(let ((items (call-with-input-file closure read-reference-graph)))
|
||
(parameterize ((sql-schema schema))
|
||
(with-database (store-database-file #:prefix prefix) db
|
||
(register-items db items
|
||
#:prefix prefix
|
||
#:registration-time %epoch)))))
|
||
|
||
|
||
;;;
|
||
;;; Partitions.
|
||
;;;
|
||
|
||
(define-record-type* <partition> partition make-partition
|
||
partition?
|
||
(device partition-device (default #f))
|
||
(size partition-size)
|
||
(file-system partition-file-system (default "ext4"))
|
||
(file-system-options partition-file-system-options ;passed to 'mkfs.FS'
|
||
(default '()))
|
||
(label partition-label (default #f))
|
||
(uuid partition-uuid (default #f))
|
||
(flags partition-flags (default '()))
|
||
(initializer partition-initializer (default (const #t))))
|
||
|
||
(define (estimated-partition-size graphs)
|
||
"Return the estimated size of a partition that can store the store items
|
||
given by GRAPHS, a list of file names produced by #:references-graphs."
|
||
;; Simply add a 25% overhead.
|
||
(round (* 1.25 (closure-size graphs))))
|
||
|
||
(define* (initialize-partition-table device partitions
|
||
#:key
|
||
(label-type "msdos")
|
||
(offset (expt 2 20)))
|
||
"Create on DEVICE a partition table of type LABEL-TYPE, containing the given
|
||
PARTITIONS (a list of <partition> objects), starting at OFFSET bytes. On
|
||
success, return PARTITIONS with their 'device' field changed to reflect their
|
||
actual /dev name based on DEVICE."
|
||
(define (partition-options part offset index)
|
||
(cons* "mkpart" "primary" "ext2"
|
||
(format #f "~aB" offset)
|
||
(format #f "~aB" (+ offset (partition-size part)))
|
||
(append-map (lambda (flag)
|
||
(list "set" (number->string index)
|
||
(symbol->string flag) "on"))
|
||
(partition-flags part))))
|
||
|
||
(define (options partitions offset)
|
||
(let loop ((partitions partitions)
|
||
(offset offset)
|
||
(index 1)
|
||
(result '()))
|
||
(match partitions
|
||
(()
|
||
(concatenate (reverse result)))
|
||
((head tail ...)
|
||
(loop tail
|
||
;; Leave one sector (512B) between partitions to placate
|
||
;; Parted.
|
||
(+ offset 512 (partition-size head))
|
||
(+ 1 index)
|
||
(cons (partition-options head offset index)
|
||
result))))))
|
||
|
||
(format #t "creating partition table with ~a partitions (~a)...\n"
|
||
(length partitions)
|
||
(string-join (map (compose (cut string-append <> " MiB")
|
||
number->string
|
||
(lambda (size)
|
||
(round (/ size (expt 2. 20))))
|
||
partition-size)
|
||
partitions)
|
||
", "))
|
||
(apply invoke "parted" "--script"
|
||
device "mklabel" label-type
|
||
(options partitions offset))
|
||
|
||
;; Set the 'device' field of each partition.
|
||
(reverse
|
||
(fold2 (lambda (part result index)
|
||
(values (cons (partition
|
||
(inherit part)
|
||
(device (string-append device
|
||
(number->string index))))
|
||
result)
|
||
(+ 1 index)))
|
||
'()
|
||
1
|
||
partitions)))
|
||
|
||
(define MS_BIND 4096) ; <sys/mounts.h> again!
|
||
|
||
(define* (create-ext-file-system partition type
|
||
#:key label uuid (options '()))
|
||
"Create an ext-family file system of TYPE on PARTITION. If LABEL is true,
|
||
use that as the volume name. If UUID is true, use it as the partition UUID."
|
||
(format #t "creating ~a partition... ~@[label: ~s~] ~@[uuid: ~s~]\n"
|
||
type label (and uuid (uuid->string uuid)))
|
||
(apply invoke (string-append "mkfs." type)
|
||
"-F" partition
|
||
`(,@(if label
|
||
`("-L" ,label)
|
||
'())
|
||
,@(if uuid
|
||
`("-U" ,(uuid->string uuid))
|
||
'())
|
||
,@options)))
|
||
|
||
(define* (create-fat-file-system partition
|
||
#:key label uuid (options '()))
|
||
"Create a FAT file system on PARTITION. The number of File Allocation Tables
|
||
will be determined based on file system size. If LABEL is true, use that as the
|
||
volume name."
|
||
;; FIXME: UUID is ignored!
|
||
(format #t "creating FAT partition...\n")
|
||
(apply invoke "mkfs.fat" partition
|
||
(append (if label `("-n" ,label) '()) options)))
|
||
|
||
(define* (format-partition partition type
|
||
#:key label uuid (options '()))
|
||
"Create a file system TYPE on PARTITION. If LABEL is true, use that as the
|
||
volume name. Options is a list of command-line options passed to 'mkfs.FS'."
|
||
(cond ((string-prefix? "ext" type)
|
||
(create-ext-file-system partition type #:label label #:uuid uuid
|
||
#:options options))
|
||
((or (string-prefix? "fat" type) (string= "vfat" type))
|
||
(create-fat-file-system partition #:label label #:uuid uuid
|
||
#:options options))
|
||
(else (error "Unsupported file system."))))
|
||
|
||
(define (initialize-partition partition)
|
||
"Format PARTITION, a <partition> object with a non-#f 'device' field, mount
|
||
it, run its initializer, and unmount it."
|
||
(let ((target "/fs"))
|
||
(format-partition (partition-device partition)
|
||
(partition-file-system partition)
|
||
#:label (partition-label partition)
|
||
#:uuid (partition-uuid partition)
|
||
#:options (partition-file-system-options partition))
|
||
(mkdir-p target)
|
||
(mount (partition-device partition) target
|
||
(partition-file-system partition))
|
||
|
||
((partition-initializer partition) target)
|
||
|
||
(umount target)
|
||
partition))
|
||
|
||
(define* (root-partition-initializer #:key (closures '())
|
||
copy-closures?
|
||
(register-closures? #t)
|
||
system-directory
|
||
(deduplicate? #t)
|
||
(make-device-nodes
|
||
make-essential-device-nodes)
|
||
(extra-directives '()))
|
||
"Return a procedure to initialize a root partition.
|
||
|
||
If REGISTER-CLOSURES? is true, register all of CLOSURES in the partition's
|
||
store. If DEDUPLICATE? is true, then also deduplicate files common to
|
||
CLOSURES and the rest of the store when registering the closures. If
|
||
COPY-CLOSURES? is true, copy all of CLOSURES to the partition.
|
||
SYSTEM-DIRECTORY is the name of the directory of the 'system' derivation.
|
||
|
||
EXTRA-DIRECTIVES is an optional list of directives to populate the root file
|
||
system that is passed to 'populate-root-file-system'."
|
||
(lambda (target)
|
||
(define target-store
|
||
(string-append target (%store-directory)))
|
||
|
||
(when copy-closures?
|
||
;; Populate the store.
|
||
(populate-store (map (cut string-append "/xchg/" <>) closures)
|
||
target
|
||
#:deduplicate? deduplicate?))
|
||
|
||
;; Populate /dev.
|
||
(make-device-nodes target)
|
||
|
||
;; Optionally, register the inputs in the image's store.
|
||
(when register-closures?
|
||
(unless copy-closures?
|
||
;; XXX: 'register-closure' wants to palpate the things it registers, so
|
||
;; bind-mount the store on the target.
|
||
(mkdir-p target-store)
|
||
(mount (%store-directory) target-store "" MS_BIND))
|
||
|
||
(display "registering closures...\n")
|
||
(for-each (lambda (closure)
|
||
(register-closure target
|
||
(string-append "/xchg/" closure)))
|
||
closures)
|
||
(unless copy-closures?
|
||
(umount target-store)))
|
||
|
||
;; Add the non-store directories and files.
|
||
(display "populating...\n")
|
||
(populate-root-file-system system-directory target
|
||
#:extras extra-directives)
|
||
|
||
;; 'register-closure' resets timestamps and everything, so no need to do it
|
||
;; once more in that case.
|
||
(unless register-closures?
|
||
;; 'reset-timestamps' also resets file permissions; do that everywhere
|
||
;; except on /dev so that /dev/null remains writable, etc.
|
||
(for-each (lambda (directory)
|
||
(reset-timestamps (string-append target "/" directory)))
|
||
(scandir target
|
||
(match-lambda
|
||
((or "." ".." "dev") #f)
|
||
(_ #t))))
|
||
(reset-timestamps (string-append target "/dev")
|
||
#:preserve-permissions? #t))))
|
||
|
||
(define (register-bootcfg-root target bootcfg)
|
||
"On file system TARGET, register BOOTCFG as a GC root."
|
||
(let ((directory (string-append target "/var/guix/gcroots")))
|
||
(mkdir-p directory)
|
||
(symlink bootcfg (string-append directory "/bootcfg"))))
|
||
|
||
(define* (initialize-hard-disk device
|
||
#:key
|
||
bootloader-package
|
||
bootcfg
|
||
bootcfg-location
|
||
bootloader-installer
|
||
(grub-efi #f)
|
||
(partitions '()))
|
||
"Initialize DEVICE as a disk containing all the <partition> objects listed
|
||
in PARTITIONS, and using BOOTCFG as its bootloader configuration file.
|
||
|
||
Each partition is initialized by calling its 'initializer' procedure,
|
||
passing it a directory name where it is mounted."
|
||
|
||
(define (partition-bootable? partition)
|
||
"Return the first partition found with the boot flag set."
|
||
(member 'boot (partition-flags partition)))
|
||
|
||
(define (partition-esp? partition)
|
||
"Return the first EFI System Partition."
|
||
(member 'esp (partition-flags partition)))
|
||
|
||
(let* ((partitions (initialize-partition-table device partitions))
|
||
(root (find partition-bootable? partitions))
|
||
(esp (find partition-esp? partitions))
|
||
(target "/fs"))
|
||
(unless root
|
||
(error "no bootable partition specified" partitions))
|
||
|
||
(for-each initialize-partition partitions)
|
||
|
||
(display "mounting root partition...\n")
|
||
(mkdir-p target)
|
||
(mount (partition-device root) target (partition-file-system root))
|
||
(install-boot-config bootcfg bootcfg-location target)
|
||
(when bootloader-installer
|
||
(display "installing bootloader...\n")
|
||
(bootloader-installer bootloader-package device target))
|
||
|
||
(when esp
|
||
;; Mount the ESP somewhere and install GRUB UEFI image.
|
||
(let ((mount-point (string-append target "/boot/efi")))
|
||
(display "mounting EFI system partition...\n")
|
||
(mkdir-p mount-point)
|
||
(mount (partition-device esp) mount-point
|
||
(partition-file-system esp))
|
||
|
||
(display "creating EFI firmware image...")
|
||
(install-efi-loader grub-efi mount-point)
|
||
(display "done.\n")
|
||
|
||
(umount mount-point)))
|
||
|
||
;; Register BOOTCFG as a GC root.
|
||
(register-bootcfg-root target bootcfg)
|
||
|
||
(umount target)))
|
||
|
||
;;; vm.scm ends here
|