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guix system: Check for the lack of modules in the initrd.
* guix/scripts/system.scm (check-mapped-devices): Take an OS instead of a list of <mapped-device>. Pass #:needed-for-boot? and #:initrd-modules to CHECK. (check-initrd-modules): New procedure. (perform-action): Move 'check-mapped-devices' call first. Add call to 'check-initrd-modules'. * gnu/system/mapped-devices.scm (check-device-initrd-modules): New procedure. (check-luks-device): Add #:initrd-modules and #:needed-for-boot?. Use them to call 'check-device-initrd-modules'.
This commit is contained in:
Ludovic Courtès
parent
bc499b113a
commit
424cea8083
2 changed files with 96 additions and 24 deletions
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@ -1,5 +1,5 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2016 Andreas Enge <andreas@enge.fr>
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;;; Copyright © 2017 Mark H Weaver <mhw@netris.org>
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;;;
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@ -30,9 +30,12 @@ (define-module (gnu system mapped-devices)
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#:use-module (gnu services shepherd)
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#:use-module (gnu system uuid)
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#:autoload (gnu build file-systems) (find-partition-by-luks-uuid)
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#:autoload (gnu build linux-modules)
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(device-module-aliases matching-modules)
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#:autoload (gnu packages cryptsetup) (cryptsetup-static)
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#:autoload (gnu packages linux) (mdadm-static)
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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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#:use-module (ice-9 match)
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@ -151,19 +154,43 @@ (define (close-luks-device source target)
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#~(zero? (system* #$(file-append cryptsetup-static "/sbin/cryptsetup")
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"close" #$target)))
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(define (check-luks-device md)
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(define (check-device-initrd-modules device linux-modules location)
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"Raise an error if DEVICE needs modules beyond LINUX-MODULES to operate.
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DEVICE must be a \"/dev\" file name."
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(let ((modules (delete-duplicates
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(append-map matching-modules
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(device-module-aliases device)))))
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(unless (every (cute member <> linux-modules) modules)
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(raise (condition
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(&message
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(message (format #f (G_ "you may need these modules \
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in the initrd for ~a:~{ ~a~}")
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device modules)))
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(&error-location
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(location (source-properties->location location))))))))
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(define* (check-luks-device md #:key
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needed-for-boot?
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(initrd-modules '())
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#:allow-other-keys
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#:rest rest)
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"Ensure the source of MD is valid."
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(let ((source (mapped-device-source md)))
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(or (not (uuid? source))
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(not (zero? (getuid)))
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(find-partition-by-luks-uuid (uuid-bytevector source))
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(raise (condition
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(&message
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(message (format #f (G_ "no LUKS partition with UUID '~a'")
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(uuid->string source))))
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(&error-location
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(location (source-properties->location
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(mapped-device-location md)))))))))
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(let ((source (mapped-device-source md))
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(location (mapped-device-location md)))
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(or (not (zero? (getuid)))
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(if (uuid? source)
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(match (find-partition-by-luks-uuid (uuid-bytevector source))
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(#f
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(raise (condition
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(&message
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(message (format #f (G_ "no LUKS partition with UUID '~a'")
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(uuid->string source))))
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(&error-location
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(location (source-properties->location
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(mapped-device-location md)))))))
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((? string? device)
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(check-device-initrd-modules device initrd-modules location)))
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(check-device-initrd-modules source initrd-modules location)))))
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(define luks-device-mapping
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;; The type of LUKS mapped devices.
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@ -41,6 +41,10 @@ (define-module (guix scripts system)
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#:use-module (gnu build install)
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#:autoload (gnu build file-systems)
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(find-partition-by-label find-partition-by-uuid)
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#:autoload (gnu build linux-modules)
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(device-module-aliases matching-modules)
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#:autoload (gnu system linux-initrd)
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(base-initrd default-initrd-modules)
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#:use-module (gnu system)
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#:use-module (gnu bootloader)
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#:use-module (gnu system file-systems)
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@ -624,21 +628,61 @@ (define (file-system-location* fs)
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;; Better be safe than sorry.
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(exit 1))))
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(define (check-mapped-devices mapped-devices)
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(define (check-mapped-devices os)
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"Check that each of MAPPED-DEVICES is valid according to the 'check'
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procedure of its type."
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(define boot-mapped-devices
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(operating-system-boot-mapped-devices os))
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(define (needed-for-boot? md)
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(memq md boot-mapped-devices))
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(define initrd-modules
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(operating-system-initrd-modules os))
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(for-each (lambda (md)
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(let ((check (mapped-device-kind-check
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(mapped-device-type md))))
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;; We expect CHECK to raise an exception with a detailed
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;; '&message' if something goes wrong, but handle the case
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;; where it just returns #f.
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(unless (check md)
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(leave (G_ "~a: invalid '~a' mapped device~%")
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(location->string
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(source-properties->location
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(mapped-device-location md)))))))
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mapped-devices))
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;; '&message' if something goes wrong.
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(check md
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#:needed-for-boot? (needed-for-boot? md)
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#:initrd-modules initrd-modules)))
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(operating-system-mapped-devices os)))
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(define (check-initrd-modules os)
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"Check that modules needed by 'needed-for-boot' file systems in OS are
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available in the initrd. Note that mapped devices are responsible for
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checking this by themselves in their 'check' procedure."
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(define (file-system-/dev fs)
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(let ((device (file-system-device fs)))
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(match (file-system-title fs)
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('device device)
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('uuid (find-partition-by-uuid device))
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('label (find-partition-by-label device)))))
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(define (check-device device location)
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(let ((modules (delete-duplicates
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(append-map matching-modules
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(device-module-aliases device)))))
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(unless (every (cute member <> (operating-system-initrd-modules os))
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modules)
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(raise (condition
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(&message
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(message (format #f (G_ "you need these modules \
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in the initrd for ~a:~{ ~a~}")
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device modules)))
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(&error-location (location location)))))))
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(define file-systems
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(filter file-system-needed-for-boot?
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(operating-system-file-systems os)))
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(for-each (lambda (fs)
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(check-device (file-system-/dev fs)
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(source-properties->location
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(file-system-location fs))))
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file-systems))
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;;;
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@ -730,9 +774,10 @@ (define println
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;; instantiating a broken configuration. Assume that we can only check if
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;; running as root.
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(when (memq action '(init reconfigure))
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(check-mapped-devices os)
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(when (zero? (getuid))
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(check-file-system-availability (operating-system-file-systems os)))
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(check-mapped-devices (operating-system-mapped-devices os)))
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(check-file-system-availability (operating-system-file-systems os))
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(check-initrd-modules os)))
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(mlet* %store-monad
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((sys (system-derivation-for-action os action
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