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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021 raid5atemyhomework <raid5atemyhomework@protonmail.com>
;;;
;;; 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 services file-systems)
#:use-module (guix gexp)
#:use-module (gnu services)
#:use-module (gnu services base)
#:use-module (gnu services shepherd))
;;; ZFS
(define (zfs-loader-shepherd-service system-zfs)
(let* ((zpool (file-append system-zfs "/sbin/zpool")))
(list
(shepherd-service
(documentation "Load ZFS kernel module and import ZFS pools.")
(provision '(zfs-loader))
(requirement '(root-file-system))
(one-shot? #t)
(modules `((srfi srfi-1)
(srfi srfi-34)
(srfi srfi-35)
(rnrs io ports)
,@%default-modules))
(start #~(lambda _
(if (not (file-exists? "/proc/sys/kernel/modprobe"))
(begin (format (current-error-port) "error: ~a~%"
"Kernel is missing loadable module support.")
#f)
(and
(let ((modprobe (call-with-input-file
"/proc/sys/kernel/modprobe" get-line)))
(guard (c ((message-condition? c)
(format (current-error-port)
"error loading 'zfs' kernel module: ~a~%"
(condition-message c))
#f))
(invoke/quiet modprobe "--" "zfs")))
(guard (c ((message-condition? c)
(format (current-error-port)
"error importing zpools: ~a~%"
(condition-message c))
#f))
;; 'current-output-port' is typically connected to /dev/klog
;; in PID 1, so redirect it to the console so we are talking
;; to the user if zpool sees an encrpyted fs that needs a
;; passphrase.
(with-output-to-port (current-error-port)
(lambda ()
(invoke #$zpool "import" "-a" "-l"))))))))))))
(define-public zfs-loader-service-type
(service-type
(name 'zfs-loader)
(description "Load ZFS kernel module and import ZFS pools.")
(extensions
(list (service-extension shepherd-root-service-type zfs-loader-shepherd-service)
(service-extension file-systems-service-type (const '(zfs-loader)))))))
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