1313 lines
52 KiB
Scheme
1313 lines
52 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2018, 2019 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 installer parted)
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#:use-module (gnu installer steps)
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#:use-module (gnu installer utils)
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#:use-module (gnu installer newt page)
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#:use-module (gnu system uuid)
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#:use-module ((gnu build file-systems)
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#:select (read-partition-uuid
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read-luks-partition-uuid))
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#:use-module (guix build syscalls)
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#:use-module (guix build utils)
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#:use-module (guix records)
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#:use-module (guix utils)
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#:use-module (guix i18n)
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#:use-module (parted)
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#:use-module (ice-9 match)
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#:use-module (ice-9 regex)
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#:use-module (rnrs io ports)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:export (<user-partition>
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user-partition
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make-user-partition
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user-partition?
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user-partition-name
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user-partition-type
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user-partition-file-name
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user-partition-disk-file-name
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user-partition-crypt-label
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user-partition-crypt-password
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user-partition-fs-type
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user-partition-bootable?
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user-partition-esp?
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user-partition-bios-grub?
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user-partition-size
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user-partition-start
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user-partition-end
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user-partition-mount-point
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user-partition-need-formatting?
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user-partition-parted-object
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find-esp-partition
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data-partition?
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metadata-partition?
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freespace-partition?
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small-freespace-partition?
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normal-partition?
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extended-partition?
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logical-partition?
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esp-partition?
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boot-partition?
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default-esp-mount-point
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with-delay-device-in-use?
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force-device-sync
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non-install-devices
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partition-user-type
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user-fs-type-name
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partition-filesystem-user-type
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partition-get-flags
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partition->user-partition
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create-special-user-partitions
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find-user-partition-by-parted-object
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device-description
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partition-end-formatted
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partition-print-number
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partition-description
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partitions-descriptions
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user-partition-description
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&max-primary-exceeded
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max-primary-exceeded?
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&extended-creation-error
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extended-creation-error?
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&logical-creation-error
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logical-creation-error?
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can-create-partition?
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mklabel
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mkpart
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rmpart
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create-adjacent-partitions
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auto-partition
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&no-root-mount-point
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no-root-mount-point?
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check-user-partitions
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set-user-partitions-file-name
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format-user-partitions
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mount-user-partitions
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umount-user-partitions
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with-mounted-partitions
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user-partitions->file-systems
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user-partitions->configuration
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init-parted
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free-parted))
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;;;
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;;; Partition record.
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;;;
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(define-record-type* <user-partition>
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user-partition make-user-partition
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user-partition?
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(name user-partition-name ;string
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(default #f))
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(type user-partition-type
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(default 'normal)) ; 'normal | 'logical | 'extended
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(file-name user-partition-file-name
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(default #f))
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(disk-file-name user-partition-disk-file-name
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(default #f))
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(crypt-label user-partition-crypt-label
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(default #f))
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(crypt-password user-partition-crypt-password
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(default #f))
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(fs-type user-partition-fs-type
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(default 'ext4))
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(bootable? user-partition-bootable?
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(default #f))
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(esp? user-partition-esp?
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(default #f))
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(bios-grub? user-partition-bios-grub?
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(default #f))
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(size user-partition-size
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(default #f))
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(start user-partition-start ;start as string (e.g. '11MB')
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(default #f))
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(end user-partition-end ;same as start
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(default #f))
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(mount-point user-partition-mount-point ;string
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(default #f))
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(need-formatting? user-partition-need-formatting? ; boolean
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(default #f))
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(parted-object user-partition-parted-object ; <partition> from parted
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(default #f)))
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;;
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;; Utilities.
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;;
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(define (find-esp-partition partitions)
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"Find and return the ESP partition among PARTITIONS."
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(find esp-partition? partitions))
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(define (data-partition? partition)
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"Return #t if PARTITION is a partition dedicated to data (by opposition to
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freespace, metadata and protected partition types), return #f otherwise."
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(let ((type (partition-type partition)))
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(not (any (lambda (flag)
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(member flag type))
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'(free-space metadata protected)))))
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(define (metadata-partition? partition)
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"Return #t if PARTITION is a metadata partition, #f otherwise."
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(let ((type (partition-type partition)))
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(member 'metadata type)))
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(define (freespace-partition? partition)
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"Return #t if PARTITION is a free-space partition, #f otherwise."
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(let ((type (partition-type partition)))
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(member 'free-space type)))
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(define* (small-freespace-partition? device
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partition
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#:key (max-size MEBIBYTE-SIZE))
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"Return #t is PARTITION is a free-space partition with less a size strictly
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inferior to MAX-SIZE, #f otherwise."
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(let ((size (partition-length partition))
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(max-sector-size (/ max-size
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(device-sector-size device))))
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(< size max-sector-size)))
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(define (normal-partition? partition)
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"return #t if partition is a normal partition, #f otherwise."
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(let ((type (partition-type partition)))
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(member 'normal type)))
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(define (extended-partition? partition)
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"return #t if partition is an extended partition, #f otherwise."
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(let ((type (partition-type partition)))
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(member 'extended type)))
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(define (logical-partition? partition)
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"Return #t if PARTITION is a logical partition, #f otherwise."
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(let ((type (partition-type partition)))
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(member 'logical type)))
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(define (partition-user-type partition)
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"Return the type of PARTITION, to be stored in the TYPE field of
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<user-partition> record. It can be 'normal, 'extended or 'logical."
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(cond ((normal-partition? partition)
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'normal)
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((extended-partition? partition)
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'extended)
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((logical-partition? partition)
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'logical)
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(else #f)))
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(define (esp-partition? partition)
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"Return #t if partition has the ESP flag, return #f otherwise."
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(let* ((disk (partition-disk partition))
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(disk-type (disk-disk-type disk))
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(has-extended? (disk-type-check-feature
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disk-type
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DISK-TYPE-FEATURE-EXTENDED)))
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(and (data-partition? partition)
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(not has-extended?)
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(partition-is-flag-available? partition PARTITION-FLAG-ESP)
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(partition-get-flag partition PARTITION-FLAG-ESP))))
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(define (boot-partition? partition)
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"Return #t if partition has the boot flag, return #f otherwise."
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(and (data-partition? partition)
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(partition-is-flag-available? partition PARTITION-FLAG-BOOT)
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(partition-get-flag partition PARTITION-FLAG-BOOT)))
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;; The default mount point for ESP partitions.
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(define default-esp-mount-point
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(make-parameter "/boot/efi"))
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(define (efi-installation?)
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"Return #t if an EFI installation should be performed, #f otherwise."
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(file-exists? "/sys/firmware/efi"))
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(define (user-fs-type-name fs-type)
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"Return the name of FS-TYPE as specified by libparted."
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(case fs-type
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((ext4) "ext4")
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((btrfs) "btrfs")
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((fat32) "fat32")
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((swap) "linux-swap")))
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(define (user-fs-type->mount-type fs-type)
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"Return the mount type of FS-TYPE."
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(case fs-type
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((ext4) "ext4")
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((btrfs) "btrfs")
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((fat32) "vfat")))
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(define (partition-filesystem-user-type partition)
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"Return the filesystem type of PARTITION, to be stored in the FS-TYPE field
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of <user-partition> record."
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(let ((fs-type (partition-fs-type partition)))
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(and fs-type
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(let ((name (filesystem-type-name fs-type)))
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(cond
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((string=? name "ext4") 'ext4)
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((string=? name "btrfs") 'btrfs)
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((string=? name "fat32") 'fat32)
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((or (string=? name "swsusp")
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(string=? name "linux-swap(v0)")
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(string=? name "linux-swap(v1)"))
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'swap)
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(else
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(error (format #f "Unhandled ~a fs-type~%" name))))))))
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(define (partition-get-flags partition)
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"Return the list of flags supported by the given PARTITION."
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(filter-map (lambda (flag)
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(and (partition-get-flag partition flag)
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flag))
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(partition-flags partition)))
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(define (partition->user-partition partition)
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"Convert PARTITION into a <user-partition> record and return it."
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(let* ((disk (partition-disk partition))
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(device (disk-device disk))
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(disk-type (disk-disk-type disk))
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(has-name? (disk-type-check-feature
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disk-type
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DISK-TYPE-FEATURE-PARTITION-NAME))
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(name (and has-name?
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(data-partition? partition)
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(partition-get-name partition))))
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(user-partition
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(name (and (and name
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(not (string=? name "")))
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name))
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(type (or (partition-user-type partition)
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'normal))
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(file-name (partition-get-path partition))
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(disk-file-name (device-path device))
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(fs-type (or (partition-filesystem-user-type partition)
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'ext4))
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(mount-point (and (esp-partition? partition)
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(default-esp-mount-point)))
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(bootable? (boot-partition? partition))
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(esp? (esp-partition? partition))
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(parted-object partition))))
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(define (create-special-user-partitions partitions)
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"Return a list with a <user-partition> record describing the ESP partition
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found in PARTITIONS, if any."
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(filter-map (lambda (partition)
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(and (esp-partition? partition)
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(partition->user-partition partition)))
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partitions))
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(define (find-user-partition-by-parted-object user-partitions
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partition)
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"Find and return the <user-partition> record in USER-PARTITIONS list which
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PARTED-OBJECT field equals PARTITION, return #f if not found."
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(find (lambda (user-partition)
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(equal? (user-partition-parted-object user-partition)
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partition))
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user-partitions))
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;;
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;; Devices
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;;
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(define (with-delay-device-in-use? file-name)
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"Call DEVICE-IN-USE? with a few retries, as the first re-read will often
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fail. See rereadpt function in wipefs.c of util-linux for an explanation."
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;; Kernel always return EINVAL for BLKRRPART on loopdevices.
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(and (not (string-match "/dev/loop*" file-name))
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(let loop ((try 4))
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(usleep 250000)
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(let ((in-use? (device-in-use? file-name)))
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(if (and in-use? (> try 0))
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(loop (- try 1))
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in-use?)))))
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(define* (force-device-sync device)
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"Force a flushing of the given DEVICE."
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(device-open device)
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(device-sync device)
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(device-close device))
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(define (non-install-devices)
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"Return all the available devices, except the busy one, allegedly the
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install device. DEVICE-IS-BUSY? is a parted call, checking if the device is
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mounted. The install image uses an overlayfs so the install device does not
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appear as mounted and won't be considered as busy. So use also DEVICE-IN-USE?
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from (guix build syscalls) module, who will try to re-read the device's
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partition table to determine whether or not it is already used (like sfdisk
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from util-linux)."
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(remove (lambda (device)
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(let ((file-name (device-path device)))
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(or (device-is-busy? device)
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(with-delay-device-in-use? file-name))))
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(devices)))
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;;
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;; Disk and partition printing.
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;;
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(define* (device-description device #:optional disk)
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"Return a string describing the given DEVICE."
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(let* ((type (device-type device))
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(file-name (device-path device))
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(model (device-model device))
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(type-str (device-type->string type))
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(disk-type (if disk
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(disk-disk-type disk)
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(disk-probe device)))
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(length (device-length device))
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(sector-size (device-sector-size device))
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(end (unit-format-custom-byte device
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(* length sector-size)
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UNIT-GIGABYTE)))
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(string-join
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`(,@(if (string=? model "")
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`(,type-str)
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`(,model ,(string-append "(" type-str ")")))
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,file-name
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,end
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,@(if disk-type
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`(,(disk-type-name disk-type))
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'()))
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" ")))
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||
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(define (partition-end-formatted device partition)
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"Return as a string the end of PARTITION with the relevant unit."
|
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(unit-format-byte
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device
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(-
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(* (+ (partition-end partition) 1)
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(device-sector-size device))
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1)))
|
||
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(define (partition-print-number partition)
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"Convert the given partition NUMBER to string."
|
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(let ((number (partition-number partition)))
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(number->string number)))
|
||
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(define (partition-description partition user-partition)
|
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"Return a string describing the given PARTITION, located on the DISK of
|
||
DEVICE."
|
||
|
||
(define (partition-print-type partition)
|
||
"Return the type of PARTITION as a string."
|
||
(if (freespace-partition? partition)
|
||
(G_ "Free space")
|
||
(let ((type (partition-type partition)))
|
||
(match type
|
||
((type-symbol)
|
||
(symbol->string type-symbol))))))
|
||
|
||
(define (partition-print-flags partition)
|
||
"Return the flags of PARTITION as a string of comma separated flags."
|
||
(string-join
|
||
(filter-map
|
||
(lambda (flag)
|
||
(and (partition-get-flag partition flag)
|
||
(partition-flag-get-name flag)))
|
||
(partition-flags partition))
|
||
","))
|
||
|
||
(define (maybe-string-pad string length)
|
||
"Returned a string formatted by padding STRING of LENGTH characters to the
|
||
right. If STRING is #f use an empty string."
|
||
(if (and string (not (string=? string "")))
|
||
(string-pad-right string length)
|
||
""))
|
||
|
||
(let* ((disk (partition-disk partition))
|
||
(device (disk-device disk))
|
||
(disk-type (disk-disk-type disk))
|
||
(has-name? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-PARTITION-NAME))
|
||
(has-extended? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-EXTENDED))
|
||
(part-type (partition-print-type partition))
|
||
(number (and (not (freespace-partition? partition))
|
||
(partition-print-number partition)))
|
||
(name (and has-name?
|
||
(if (freespace-partition? partition)
|
||
(G_ "Free space")
|
||
(partition-get-name partition))))
|
||
(start (unit-format device
|
||
(partition-start partition)))
|
||
(end (partition-end-formatted device partition))
|
||
(size (unit-format device (partition-length partition)))
|
||
(fs-type (partition-fs-type partition))
|
||
(fs-type-name (and fs-type
|
||
(filesystem-type-name fs-type)))
|
||
(crypt-label (and user-partition
|
||
(user-partition-crypt-label user-partition)))
|
||
(flags (and (not (freespace-partition? partition))
|
||
(partition-print-flags partition)))
|
||
(mount-point (and user-partition
|
||
(user-partition-mount-point user-partition))))
|
||
`(,(or number "")
|
||
,@(if has-extended?
|
||
(list part-type)
|
||
'())
|
||
,size
|
||
,(or fs-type-name "")
|
||
,(or flags "")
|
||
,(or mount-point "")
|
||
,(or crypt-label "")
|
||
,(maybe-string-pad name 30))))
|
||
|
||
(define (partitions-descriptions partitions user-partitions)
|
||
"Return a list of strings describing all the partitions found on
|
||
DEVICE. METADATA partitions are not described. The strings are padded to the
|
||
right so that they can be displayed as a table."
|
||
|
||
(define (max-length-column lists column-index)
|
||
"Return the maximum length of the string at position COLUMN-INDEX in the
|
||
list of string lists LISTS."
|
||
(apply max
|
||
(map (lambda (list)
|
||
(string-length
|
||
(list-ref list column-index)))
|
||
lists)))
|
||
|
||
(define (pad-descriptions descriptions)
|
||
"Return a padded version of the list of string lists DESCRIPTIONS. The
|
||
strings are padded to the length of the longer string in a same column, as
|
||
determined by MAX-LENGTH-COLUMN procedure."
|
||
(let* ((description-length (length (car descriptions)))
|
||
(paddings (map (lambda (index)
|
||
(max-length-column descriptions index))
|
||
(iota description-length))))
|
||
(map (lambda (description)
|
||
(map string-pad-right description paddings))
|
||
descriptions)))
|
||
|
||
(let* ((descriptions
|
||
(map
|
||
(lambda (partition)
|
||
(let ((user-partition
|
||
(find-user-partition-by-parted-object user-partitions
|
||
partition)))
|
||
(partition-description partition user-partition)))
|
||
partitions))
|
||
(padded-descriptions (if (null? partitions)
|
||
'()
|
||
(pad-descriptions descriptions))))
|
||
(map (cut string-join <> " ") padded-descriptions)))
|
||
|
||
(define (user-partition-description user-partition)
|
||
"Return a string describing the given USER-PARTITION record."
|
||
(let* ((partition (user-partition-parted-object user-partition))
|
||
(disk (partition-disk partition))
|
||
(disk-type (disk-disk-type disk))
|
||
(device (disk-device disk))
|
||
(has-name? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-PARTITION-NAME))
|
||
(has-extended? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-EXTENDED))
|
||
(name (user-partition-name user-partition))
|
||
(type (user-partition-type user-partition))
|
||
(type-name (symbol->string type))
|
||
(fs-type (user-partition-fs-type user-partition))
|
||
(fs-type-name (user-fs-type-name fs-type))
|
||
(bootable? (user-partition-bootable? user-partition))
|
||
(esp? (user-partition-esp? user-partition))
|
||
(need-formatting? (user-partition-need-formatting? user-partition))
|
||
(crypt-label (user-partition-crypt-label user-partition))
|
||
(size (user-partition-size user-partition))
|
||
(mount-point (user-partition-mount-point user-partition)))
|
||
`(,@(if has-name?
|
||
`((name . ,(string-append "Name: " (or name "None"))))
|
||
'())
|
||
,@(if (and has-extended?
|
||
(freespace-partition? partition)
|
||
(not (eq? type 'logical)))
|
||
`((type . ,(string-append "Type: " type-name)))
|
||
'())
|
||
,@(if (eq? type 'extended)
|
||
'()
|
||
`((fs-type . ,(string-append "Filesystem type: " fs-type-name))))
|
||
,@(if (or (eq? type 'extended)
|
||
(eq? fs-type 'swap)
|
||
(not has-extended?))
|
||
'()
|
||
`((bootable . ,(string-append "Bootable flag: "
|
||
(if bootable? "On" "Off")))))
|
||
,@(if (and (not has-extended?)
|
||
(not (eq? fs-type 'swap)))
|
||
`((esp? . ,(string-append "ESP flag: "
|
||
(if esp? "On" "Off"))))
|
||
'())
|
||
,@(if (freespace-partition? partition)
|
||
(let ((size-formatted
|
||
(or size (unit-format device
|
||
(partition-length partition)))))
|
||
`((size . ,(string-append "Size : " size-formatted))))
|
||
'())
|
||
,@(if (or (eq? type 'extended)
|
||
(eq? fs-type 'swap))
|
||
'()
|
||
`((crypt-label
|
||
. ,(string-append
|
||
"Encryption: "
|
||
(if crypt-label
|
||
(format #f "Yes (label ~a)" crypt-label)
|
||
"No")))))
|
||
,@(if (or (freespace-partition? partition)
|
||
(eq? fs-type 'swap))
|
||
'()
|
||
`((need-formatting?
|
||
. ,(string-append "Format the partition? : "
|
||
(if need-formatting? "Yes" "No")))))
|
||
,@(if (or (eq? type 'extended)
|
||
(eq? fs-type 'swap))
|
||
'()
|
||
`((mount-point
|
||
. ,(string-append "Mount point : "
|
||
(or mount-point
|
||
(and esp? (default-esp-mount-point))
|
||
"None"))))))))
|
||
|
||
|
||
;;
|
||
;; Partition table creation.
|
||
;;
|
||
|
||
(define (mklabel device type-name)
|
||
"Create a partition table on DEVICE. TYPE-NAME is the type of the partition
|
||
table, \"msdos\" or \"gpt\"."
|
||
(let ((type (disk-type-get type-name)))
|
||
(disk-new-fresh device type)))
|
||
|
||
|
||
;;
|
||
;; Partition creation.
|
||
;;
|
||
|
||
;; The maximum count of primary partitions is exceeded.
|
||
(define-condition-type &max-primary-exceeded &condition
|
||
max-primary-exceeded?)
|
||
|
||
;; It is not possible to create an extended partition.
|
||
(define-condition-type &extended-creation-error &condition
|
||
extended-creation-error?)
|
||
|
||
;; It is not possible to create a logical partition.
|
||
(define-condition-type &logical-creation-error &condition
|
||
logical-creation-error?)
|
||
|
||
(define (can-create-primary? disk)
|
||
"Return #t if it is possible to create a primary partition on DISK, return
|
||
#f otherwise."
|
||
(let ((max-primary (disk-get-max-primary-partition-count disk)))
|
||
(find (lambda (number)
|
||
(not (disk-get-partition disk number)))
|
||
(iota max-primary 1))))
|
||
|
||
(define (can-create-extended? disk)
|
||
"Return #t if it is possible to create an extended partition on DISK, return
|
||
#f otherwise."
|
||
(let* ((disk-type (disk-disk-type disk))
|
||
(has-extended? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-EXTENDED)))
|
||
(and (can-create-primary? disk)
|
||
has-extended?
|
||
(not (disk-extended-partition disk)))))
|
||
|
||
(define (can-create-logical? disk)
|
||
"Return #t is it is possible to create a logical partition on DISK, return
|
||
#f otherwise."
|
||
(let* ((disk-type (disk-disk-type disk))
|
||
(has-extended? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-EXTENDED)))
|
||
(and has-extended?
|
||
(disk-extended-partition disk))))
|
||
|
||
(define (can-create-partition? user-part)
|
||
"Return #t if it is possible to create the given USER-PART record, return #f
|
||
otherwise."
|
||
(let* ((type (user-partition-type user-part))
|
||
(partition (user-partition-parted-object user-part))
|
||
(disk (partition-disk partition)))
|
||
(case type
|
||
((normal)
|
||
(or (can-create-primary? disk)
|
||
(raise
|
||
(condition (&max-primary-exceeded)))))
|
||
((extended)
|
||
(or (can-create-extended? disk)
|
||
(raise
|
||
(condition (&extended-creation-error)))))
|
||
((logical)
|
||
(or (can-create-logical? disk)
|
||
(raise
|
||
(condition (&logical-creation-error))))))))
|
||
|
||
(define* (mkpart disk user-partition
|
||
#:key (previous-partition #f))
|
||
"Create the given USER-PARTITION on DISK. The PREVIOUS-PARTITION argument as
|
||
to be set to the partition preceding USER-PARTITION if any."
|
||
|
||
(define (parse-start-end start end)
|
||
"Parse start and end strings as positions on DEVICE expressed with a unit,
|
||
like '100GB' or '12.2KiB'. Return a list of 4 elements, the start sector, its
|
||
range (1 unit large area centered on start sector), the end sector and its
|
||
range."
|
||
(let ((device (disk-device disk)))
|
||
(call-with-values
|
||
(lambda ()
|
||
(unit-parse start device))
|
||
(lambda (start-sector start-range)
|
||
(call-with-values
|
||
(lambda ()
|
||
(unit-parse end device))
|
||
(lambda (end-sector end-range)
|
||
(list start-sector start-range
|
||
end-sector end-range)))))))
|
||
|
||
(define* (extend-ranges! start-range end-range
|
||
#:key (offset 0))
|
||
"Try to extend START-RANGE by 1 MEBIBYTE to the right and END-RANGE by 1
|
||
MEBIBYTE to the left. This way, if the disk is aligned on 2048 sectors of
|
||
512KB (like frequently), we will have a chance for the
|
||
'optimal-align-constraint' to succeed. Do not extend ranges if that would
|
||
cause them to cross."
|
||
(let* ((device (disk-device disk))
|
||
(start-range-end (geometry-end start-range))
|
||
(end-range-start (geometry-start end-range))
|
||
(mebibyte-sector-size (/ MEBIBYTE-SIZE
|
||
(device-sector-size device)))
|
||
(new-start-range-end
|
||
(+ start-range-end mebibyte-sector-size offset))
|
||
(new-end-range-start
|
||
(- end-range-start mebibyte-sector-size offset)))
|
||
(when (< new-start-range-end new-end-range-start)
|
||
(geometry-set-end start-range new-start-range-end)
|
||
(geometry-set-start end-range new-end-range-start))))
|
||
|
||
(match (parse-start-end (user-partition-start user-partition)
|
||
(user-partition-end user-partition))
|
||
((start-sector start-range end-sector end-range)
|
||
(let* ((prev-end (if previous-partition
|
||
(partition-end previous-partition)
|
||
0))
|
||
(start-distance (- start-sector prev-end))
|
||
(type (user-partition-type user-partition))
|
||
;; There should be at least 2 unallocated sectors in front of each
|
||
;; logical partition, otherwise parted will fail badly:
|
||
;; https://gparted.org/h2-fix-msdos-pt.php#apply-action-fail.
|
||
(start-offset (if previous-partition
|
||
(- 3 start-distance)
|
||
0))
|
||
(start-sector* (if (and (eq? type 'logical)
|
||
(< start-distance 3))
|
||
(+ start-sector start-offset)
|
||
start-sector)))
|
||
;; This is a hack. Parted almost always fails to create optimally
|
||
;; aligned partitions (unless specifying percentages) because the
|
||
;; default range of 1MB centered on the start sector is not enough when
|
||
;; the optimal alignment is 2048 sectors of 512KB.
|
||
(extend-ranges! start-range end-range #:offset start-offset)
|
||
|
||
(let* ((device (disk-device disk))
|
||
(disk-type (disk-disk-type disk))
|
||
(length (device-length device))
|
||
(name (user-partition-name user-partition))
|
||
(filesystem-type
|
||
(filesystem-type-get
|
||
(user-fs-type-name
|
||
(user-partition-fs-type user-partition))))
|
||
(flags `(,@(if (user-partition-bootable? user-partition)
|
||
`(,PARTITION-FLAG-BOOT)
|
||
'())
|
||
,@(if (user-partition-esp? user-partition)
|
||
`(,PARTITION-FLAG-ESP)
|
||
'())
|
||
,@(if (user-partition-bios-grub? user-partition)
|
||
`(,PARTITION-FLAG-BIOS-GRUB)
|
||
'())))
|
||
(has-name? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-PARTITION-NAME))
|
||
(partition-type (partition-type->int type))
|
||
(partition (partition-new disk
|
||
#:type partition-type
|
||
#:filesystem-type filesystem-type
|
||
#:start start-sector*
|
||
#:end end-sector))
|
||
(user-constraint (constraint-new
|
||
#:start-align 'any
|
||
#:end-align 'any
|
||
#:start-range start-range
|
||
#:end-range end-range
|
||
#:min-size 1
|
||
#:max-size length))
|
||
(dev-constraint
|
||
(device-get-optimal-aligned-constraint device))
|
||
(final-constraint (constraint-intersect user-constraint
|
||
dev-constraint))
|
||
(no-constraint (constraint-any device))
|
||
;; Try to create a partition with an optimal alignment
|
||
;; constraint. If it fails, fallback to creating a partition with
|
||
;; no specific constraint.
|
||
(partition-ok?
|
||
(or (disk-add-partition disk partition final-constraint)
|
||
(disk-add-partition disk partition no-constraint))))
|
||
;; Set the partition name if supported.
|
||
(when (and partition-ok? has-name? name)
|
||
(partition-set-name partition name))
|
||
|
||
;; Set flags is required.
|
||
(for-each (lambda (flag)
|
||
(and (partition-is-flag-available? partition flag)
|
||
(partition-set-flag partition flag 1)))
|
||
flags)
|
||
|
||
(and partition-ok?
|
||
(partition-set-system partition filesystem-type)
|
||
partition))))))
|
||
|
||
|
||
;;
|
||
;; Partition destruction.
|
||
;;
|
||
|
||
(define (rmpart disk number)
|
||
"Remove the partition with the given NUMBER on DISK."
|
||
(let ((partition (disk-get-partition disk number)))
|
||
(disk-remove-partition disk partition)))
|
||
|
||
|
||
;;
|
||
;; Auto partitionning.
|
||
;;
|
||
|
||
(define* (create-adjacent-partitions disk partitions
|
||
#:key (last-partition-end 0))
|
||
"Create the given PARTITIONS on DISK. LAST-PARTITION-END is the sector from
|
||
which we want to start creating partitions. The START and END of each created
|
||
partition are computed from its SIZE value and the position of the last
|
||
partition."
|
||
(let ((device (disk-device disk)))
|
||
(let loop ((partitions partitions)
|
||
(remaining-space (- (device-length device)
|
||
last-partition-end))
|
||
(start last-partition-end))
|
||
(match partitions
|
||
(() '())
|
||
((partition . rest)
|
||
(let* ((size (user-partition-size partition))
|
||
(percentage-size (and (string? size)
|
||
(read-percentage size)))
|
||
(sector-size (device-sector-size device))
|
||
(partition-size (if percentage-size
|
||
(exact->inexact
|
||
(* (/ percentage-size 100)
|
||
remaining-space))
|
||
size))
|
||
(end-partition (min (- (device-length device) 1)
|
||
(nearest-exact-integer
|
||
(+ start partition-size 1))))
|
||
(name (user-partition-name partition))
|
||
(type (user-partition-type partition))
|
||
(fs-type (user-partition-fs-type partition))
|
||
(start-formatted (unit-format-custom device
|
||
start
|
||
UNIT-SECTOR))
|
||
(end-formatted (unit-format-custom device
|
||
end-partition
|
||
UNIT-SECTOR))
|
||
(new-user-partition (user-partition
|
||
(inherit partition)
|
||
(start start-formatted)
|
||
(end end-formatted)))
|
||
(new-partition
|
||
(mkpart disk new-user-partition)))
|
||
(if new-partition
|
||
(cons (user-partition
|
||
(inherit new-user-partition)
|
||
(file-name (partition-get-path new-partition))
|
||
(disk-file-name (device-path device))
|
||
(parted-object new-partition))
|
||
(loop rest
|
||
(if (eq? type 'extended)
|
||
remaining-space
|
||
(- remaining-space
|
||
(partition-length new-partition)))
|
||
(if (eq? type 'extended)
|
||
(+ start 1)
|
||
(+ (partition-end new-partition) 1))))
|
||
(error
|
||
(format #f "Unable to create partition ~a~%" name)))))))))
|
||
|
||
(define (force-user-partitions-formatting user-partitions)
|
||
"Set the NEED-FORMATING? fields to #t on all <user-partition> records of
|
||
USER-PARTITIONS list and return the updated list."
|
||
(map (lambda (p)
|
||
(user-partition
|
||
(inherit p)
|
||
(need-formatting? #t)))
|
||
user-partitions))
|
||
|
||
(define* (auto-partition disk
|
||
#:key
|
||
(scheme 'entire-root))
|
||
"Automatically create partitions on DISK. All the previous
|
||
partitions (except the ESP on a GPT disk, if present) are wiped. SCHEME is the
|
||
desired partitioning scheme. It can be 'entire-root or
|
||
'entire-root-home. 'entire-root will create a swap partition and a root
|
||
partition occupying all the remaining space. 'entire-root-home will create a
|
||
swap partition, a root partition and a home partition."
|
||
(let* ((device (disk-device disk))
|
||
(disk-type (disk-disk-type disk))
|
||
(has-extended? (disk-type-check-feature
|
||
disk-type
|
||
DISK-TYPE-FEATURE-EXTENDED))
|
||
(partitions (filter data-partition? (disk-partitions disk)))
|
||
(esp-partition (find-esp-partition partitions))
|
||
;; According to
|
||
;; https://wiki.archlinux.org/index.php/EFI_system_partition, the ESP
|
||
;; size should be at least 550MiB.
|
||
(new-esp-size (nearest-exact-integer
|
||
(/ (* 550 MEBIBYTE-SIZE)
|
||
(device-sector-size device))))
|
||
(end-esp-partition (and esp-partition
|
||
(partition-end esp-partition)))
|
||
(non-boot-partitions (remove esp-partition? partitions))
|
||
(bios-grub-size (/ (* 3 MEBIBYTE-SIZE)
|
||
(device-sector-size device)))
|
||
(five-percent-disk (nearest-exact-integer
|
||
(* 0.05 (device-length device))))
|
||
(default-swap-size (nearest-exact-integer
|
||
(/ (* 4 GIGABYTE-SIZE)
|
||
(device-sector-size device))))
|
||
;; Use a 4GB size for the swap if it represents less than 5% of the
|
||
;; disk space. Otherwise, set the swap size to 5% of the disk space.
|
||
(swap-size (min default-swap-size five-percent-disk)))
|
||
|
||
(if has-extended?
|
||
;; msdos - remove everything.
|
||
(disk-delete-all disk)
|
||
;; gpt - remove everything but esp if it exists.
|
||
(for-each
|
||
(lambda (partition)
|
||
(and (data-partition? partition)
|
||
(disk-remove-partition disk partition)))
|
||
non-boot-partitions))
|
||
|
||
(let* ((start-partition
|
||
(and (not has-extended?)
|
||
(not esp-partition)
|
||
(if (efi-installation?)
|
||
(user-partition
|
||
(fs-type 'fat32)
|
||
(esp? #t)
|
||
(size new-esp-size)
|
||
(mount-point (default-esp-mount-point)))
|
||
(user-partition
|
||
(fs-type 'ext4)
|
||
(bootable? #t)
|
||
(bios-grub? #t)
|
||
(size bios-grub-size)))))
|
||
(new-partitions
|
||
(cond
|
||
((or (eq? scheme 'entire-root)
|
||
(eq? scheme 'entire-encrypted-root))
|
||
(let ((encrypted? (eq? scheme 'entire-encrypted-root)))
|
||
`(,@(if start-partition
|
||
`(,start-partition)
|
||
'())
|
||
,@(if encrypted?
|
||
'()
|
||
`(,(user-partition
|
||
(fs-type 'swap)
|
||
(size swap-size))))
|
||
,(user-partition
|
||
(fs-type 'ext4)
|
||
(bootable? has-extended?)
|
||
(crypt-label (and encrypted? "cryptroot"))
|
||
(size "100%")
|
||
(mount-point "/")))))
|
||
((or (eq? scheme 'entire-root-home)
|
||
(eq? scheme 'entire-encrypted-root-home))
|
||
(let ((encrypted? (eq? scheme 'entire-encrypted-root-home)))
|
||
`(,@(if start-partition
|
||
`(,start-partition)
|
||
'())
|
||
,(user-partition
|
||
(fs-type 'ext4)
|
||
(bootable? has-extended?)
|
||
(crypt-label (and encrypted? "cryptroot"))
|
||
(size "33%")
|
||
(mount-point "/"))
|
||
,@(if has-extended?
|
||
`(,(user-partition
|
||
(type 'extended)
|
||
(size "100%")))
|
||
'())
|
||
,@(if encrypted?
|
||
'()
|
||
`(,(user-partition
|
||
(type (if has-extended?
|
||
'logical
|
||
'normal))
|
||
(fs-type 'swap)
|
||
(size swap-size))))
|
||
,(user-partition
|
||
(type (if has-extended?
|
||
'logical
|
||
'normal))
|
||
(fs-type 'ext4)
|
||
(crypt-label (and encrypted? "crypthome"))
|
||
(size "100%")
|
||
(mount-point "/home")))))))
|
||
(new-partitions* (force-user-partitions-formatting
|
||
new-partitions)))
|
||
(create-adjacent-partitions disk
|
||
new-partitions*
|
||
#:last-partition-end
|
||
(or end-esp-partition 0)))))
|
||
|
||
|
||
;;
|
||
;; Convert user-partitions.
|
||
;;
|
||
|
||
;; No root mount point found.
|
||
(define-condition-type &no-root-mount-point &condition
|
||
no-root-mount-point?)
|
||
|
||
(define (check-user-partitions user-partitions)
|
||
"Return #t if the USER-PARTITIONS lists contains one <user-partition> record
|
||
with a mount-point set to '/', raise &no-root-mount-point condition
|
||
otherwise."
|
||
(let ((mount-points
|
||
(map user-partition-mount-point user-partitions)))
|
||
(or (member "/" mount-points)
|
||
(raise
|
||
(condition (&no-root-mount-point))))))
|
||
|
||
(define (set-user-partitions-file-name user-partitions)
|
||
"Set the partition file-name of <user-partition> records in USER-PARTITIONS
|
||
list and return the updated list."
|
||
(map (lambda (p)
|
||
(let* ((partition (user-partition-parted-object p))
|
||
(file-name (partition-get-path partition)))
|
||
(user-partition
|
||
(inherit p)
|
||
(file-name file-name))))
|
||
user-partitions))
|
||
|
||
(define-syntax-rule (with-null-output-ports exp ...)
|
||
"Evaluate EXP with both the output port and the error port pointing to the
|
||
bit bucket."
|
||
(with-output-to-port (%make-void-port "w")
|
||
(lambda ()
|
||
(with-error-to-port (%make-void-port "w")
|
||
(lambda () exp ...)))))
|
||
|
||
(define (create-ext4-file-system partition)
|
||
"Create an ext4 file-system for PARTITION file-name."
|
||
(with-null-output-ports
|
||
(invoke "mkfs.ext4" "-F" partition)))
|
||
|
||
(define (create-fat32-file-system partition)
|
||
"Create an ext4 file-system for PARTITION file-name."
|
||
(with-null-output-ports
|
||
(invoke "mkfs.fat" "-F32" partition)))
|
||
|
||
(define (create-swap-partition partition)
|
||
"Set up swap area on PARTITION file-name."
|
||
(with-null-output-ports
|
||
(invoke "mkswap" "-f" partition)))
|
||
|
||
(define (call-with-luks-key-file password proc)
|
||
"Write PASSWORD in a temporary file and pass it to PROC as argument."
|
||
(call-with-temporary-output-file
|
||
(lambda (file port)
|
||
(put-string port password)
|
||
(close port)
|
||
(proc file))))
|
||
|
||
(define (user-partition-upper-file-name user-partition)
|
||
"Return the file-name of the virtual block device corresponding to
|
||
USER-PARTITION if it is encrypted, or the plain file-name otherwise."
|
||
(let ((crypt-label (user-partition-crypt-label user-partition))
|
||
(file-name (user-partition-file-name user-partition)))
|
||
(if crypt-label
|
||
(string-append "/dev/mapper/" crypt-label)
|
||
file-name)))
|
||
|
||
(define (luks-format-and-open user-partition)
|
||
"Format and open the encrypted partition pointed by USER-PARTITION."
|
||
(let* ((file-name (user-partition-file-name user-partition))
|
||
(label (user-partition-crypt-label user-partition))
|
||
(password (user-partition-crypt-password user-partition)))
|
||
(call-with-luks-key-file
|
||
password
|
||
(lambda (key-file)
|
||
(system* "cryptsetup" "-q" "luksFormat" file-name key-file)
|
||
(system* "cryptsetup" "open" "--type" "luks"
|
||
"--key-file" key-file file-name label)))))
|
||
|
||
(define (luks-close user-partition)
|
||
"Close the encrypted partition pointed by USER-PARTITION."
|
||
(let ((label (user-partition-crypt-label user-partition)))
|
||
(system* "cryptsetup" "close" label)))
|
||
|
||
(define (format-user-partitions user-partitions)
|
||
"Format the <user-partition> records in USER-PARTITIONS list with
|
||
NEED-FORMATING? field set to #t."
|
||
(for-each
|
||
(lambda (user-partition)
|
||
(let* ((need-formatting?
|
||
(user-partition-need-formatting? user-partition))
|
||
(type (user-partition-type user-partition))
|
||
(crypt-label (user-partition-crypt-label user-partition))
|
||
(file-name (user-partition-upper-file-name user-partition))
|
||
(fs-type (user-partition-fs-type user-partition)))
|
||
(when crypt-label
|
||
(luks-format-and-open user-partition))
|
||
|
||
(case fs-type
|
||
((ext4)
|
||
(and need-formatting?
|
||
(not (eq? type 'extended))
|
||
(create-ext4-file-system file-name)))
|
||
((fat32)
|
||
(and need-formatting?
|
||
(not (eq? type 'extended))
|
||
(create-fat32-file-system file-name)))
|
||
((swap)
|
||
(create-swap-partition file-name))
|
||
(else
|
||
;; TODO: Add support for other file-system types.
|
||
#t))))
|
||
user-partitions))
|
||
|
||
(define (sort-partitions user-partitions)
|
||
"Sort USER-PARTITIONS by mount-points, so that the more nested mount-point
|
||
comes last. This is useful to mount/umount partitions in a coherent order."
|
||
(sort user-partitions
|
||
(lambda (a b)
|
||
(let ((mount-point-a (user-partition-mount-point a))
|
||
(mount-point-b (user-partition-mount-point b)))
|
||
(string-prefix? mount-point-a mount-point-b)))))
|
||
|
||
(define (mount-user-partitions user-partitions)
|
||
"Mount the <user-partition> records in USER-PARTITIONS list on their
|
||
respective mount-points."
|
||
(let* ((mount-partitions (filter user-partition-mount-point user-partitions))
|
||
(sorted-partitions (sort-partitions mount-partitions)))
|
||
(for-each (lambda (user-partition)
|
||
(let* ((mount-point
|
||
(user-partition-mount-point user-partition))
|
||
(target
|
||
(string-append (%installer-target-dir)
|
||
mount-point))
|
||
(fs-type
|
||
(user-partition-fs-type user-partition))
|
||
(crypt-label
|
||
(user-partition-crypt-label user-partition))
|
||
(mount-type
|
||
(user-fs-type->mount-type fs-type))
|
||
(file-name
|
||
(user-partition-upper-file-name user-partition)))
|
||
(mkdir-p target)
|
||
(mount file-name target mount-type)))
|
||
sorted-partitions)))
|
||
|
||
(define (umount-user-partitions user-partitions)
|
||
"Unmount all the <user-partition> records in USER-PARTITIONS list."
|
||
(let* ((mount-partitions (filter user-partition-mount-point user-partitions))
|
||
(sorted-partitions (sort-partitions mount-partitions)))
|
||
(for-each (lambda (user-partition)
|
||
(let* ((mount-point
|
||
(user-partition-mount-point user-partition))
|
||
(crypt-label
|
||
(user-partition-crypt-label user-partition))
|
||
(target
|
||
(string-append (%installer-target-dir)
|
||
mount-point)))
|
||
(umount target)
|
||
(when crypt-label
|
||
(luks-close user-partition))))
|
||
(reverse sorted-partitions))))
|
||
|
||
(define (find-swap-user-partitions user-partitions)
|
||
"Return the subset of <user-partition> records in USER-PARTITIONS list with
|
||
the FS-TYPE field set to 'swap, return the empty list if none found."
|
||
(filter (lambda (user-partition)
|
||
(let ((fs-type (user-partition-fs-type user-partition)))
|
||
(eq? fs-type 'swap)))
|
||
user-partitions))
|
||
|
||
(define (start-swapping user-partitions)
|
||
"Start swaping on <user-partition> records with FS-TYPE equal to 'swap."
|
||
(let* ((swap-user-partitions (find-swap-user-partitions user-partitions))
|
||
(swap-devices (map user-partition-file-name swap-user-partitions)))
|
||
(for-each swapon swap-devices)))
|
||
|
||
(define (stop-swapping user-partitions)
|
||
"Stop swaping on <user-partition> records with FS-TYPE equal to 'swap."
|
||
(let* ((swap-user-partitions (find-swap-user-partitions user-partitions))
|
||
(swap-devices (map user-partition-file-name swap-user-partitions)))
|
||
(for-each swapoff swap-devices)))
|
||
|
||
(define-syntax-rule (with-mounted-partitions user-partitions exp ...)
|
||
"Mount USER-PARTITIONS and start swapping within the dynamic extent of EXP."
|
||
(dynamic-wind
|
||
(lambda ()
|
||
(mount-user-partitions user-partitions)
|
||
(start-swapping user-partitions))
|
||
(lambda ()
|
||
exp ...)
|
||
(lambda ()
|
||
(umount-user-partitions user-partitions)
|
||
(stop-swapping user-partitions)
|
||
#f)))
|
||
|
||
(define (user-partition->file-system user-partition)
|
||
"Convert the given USER-PARTITION record in a FILE-SYSTEM record from
|
||
(gnu system file-systems) module and return it."
|
||
(let* ((mount-point (user-partition-mount-point user-partition))
|
||
(fs-type (user-partition-fs-type user-partition))
|
||
(crypt-label (user-partition-crypt-label user-partition))
|
||
(mount-type (user-fs-type->mount-type fs-type))
|
||
(file-name (user-partition-file-name user-partition))
|
||
(upper-file-name (user-partition-upper-file-name user-partition))
|
||
;; Only compute uuid if partition is not encrypted.
|
||
(uuid (or crypt-label
|
||
(uuid->string (read-partition-uuid file-name) fs-type))))
|
||
`(file-system
|
||
(mount-point ,mount-point)
|
||
(device ,@(if crypt-label
|
||
`(,upper-file-name)
|
||
`((uuid ,uuid (quote ,fs-type)))))
|
||
(type ,mount-type)
|
||
,@(if crypt-label
|
||
'((dependencies mapped-devices))
|
||
'()))))
|
||
|
||
(define (user-partitions->file-systems user-partitions)
|
||
"Convert the given USER-PARTITIONS list of <user-partition> records into a
|
||
list of <file-system> records."
|
||
(filter-map
|
||
(lambda (user-partition)
|
||
(let ((mount-point
|
||
(user-partition-mount-point user-partition)))
|
||
(and mount-point
|
||
(user-partition->file-system user-partition))))
|
||
user-partitions))
|
||
|
||
(define (user-partition->mapped-device user-partition)
|
||
"Convert the given USER-PARTITION record into a MAPPED-DEVICE record
|
||
from (gnu system mapped-devices) and return it."
|
||
(let ((label (user-partition-crypt-label user-partition))
|
||
(file-name (user-partition-file-name user-partition)))
|
||
`(mapped-device
|
||
(source (uuid ,(uuid->string
|
||
(read-luks-partition-uuid file-name)
|
||
'luks)))
|
||
(target ,label)
|
||
(type luks-device-mapping))))
|
||
|
||
(define (bootloader-configuration user-partitions)
|
||
"Return the bootloader configuration field for USER-PARTITIONS."
|
||
(let* ((root-partition
|
||
(find (lambda (user-partition)
|
||
(let ((mount-point
|
||
(user-partition-mount-point user-partition)))
|
||
(and mount-point
|
||
(string=? mount-point "/"))))
|
||
user-partitions))
|
||
(root-partition-disk (user-partition-disk-file-name root-partition)))
|
||
`((bootloader-configuration
|
||
,@(if (efi-installation?)
|
||
`((bootloader grub-efi-bootloader)
|
||
(target ,(default-esp-mount-point)))
|
||
`((bootloader grub-bootloader)
|
||
(target ,root-partition-disk)))))))
|
||
|
||
(define (user-partitions->configuration user-partitions)
|
||
"Return the configuration field for USER-PARTITIONS."
|
||
(let* ((swap-user-partitions (find-swap-user-partitions user-partitions))
|
||
(swap-devices (map user-partition-file-name swap-user-partitions))
|
||
(encrypted-partitions
|
||
(filter user-partition-crypt-label user-partitions)))
|
||
`(,@(if (null? swap-devices)
|
||
'()
|
||
`((swap-devices (list ,@swap-devices))))
|
||
(bootloader ,@(bootloader-configuration user-partitions))
|
||
,@(if (null? encrypted-partitions)
|
||
'()
|
||
`((mapped-devices
|
||
(list ,@(map user-partition->mapped-device
|
||
encrypted-partitions)))))
|
||
(file-systems (cons*
|
||
,@(user-partitions->file-systems user-partitions)
|
||
%base-file-systems)))))
|
||
|
||
|
||
;;
|
||
;; Initialization.
|
||
;;
|
||
|
||
(define (init-parted)
|
||
"Initialize libparted support."
|
||
(probe-all-devices)
|
||
(exception-set-handler (lambda (exception)
|
||
EXCEPTION-OPTION-UNHANDLED)))
|
||
|
||
(define (free-parted devices)
|
||
"Deallocate memory used for DEVICES in parted, force sync them and wait for
|
||
the devices not to be used before returning."
|
||
;; XXX: Formatting and further operations on disk partition table may fail
|
||
;; because the partition table changes are not synced, or because the device
|
||
;; is still in use, even if parted should have finished editing
|
||
;; partitions. This is not well understood, but syncing devices and waiting
|
||
;; them to stop returning EBUSY to BLKRRPART ioctl seems to be enough. The
|
||
;; same kind of issue is described here:
|
||
;; https://mail.gnome.org/archives/commits-list/2013-March/msg18423.html.
|
||
(let ((device-file-names (map device-path devices)))
|
||
(for-each force-device-sync devices)
|
||
(free-all-devices)
|
||
(for-each (lambda (file-name)
|
||
(let ((in-use? (with-delay-device-in-use? file-name)))
|
||
(and in-use?
|
||
(error
|
||
(format #f (G_ "Device ~a is still in use.")
|
||
file-name)))))
|
||
device-file-names)))
|