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linux-modules: Factorize 'missing-modules'.

* gnu/build/linux-modules.scm (missing-modules): New procedure.
* gnu/system/mapped-devices.scm (check-device-initrd-modules): Use it.
wip-perl6
Ludovic Courtès 3 years ago
parent
commit
4cd386afae
No known key found for this signature in database GPG Key ID: 90B11993D9AEBB5
  1. 27
      gnu/build/linux-modules.scm
  2. 55
      gnu/system/mapped-devices.scm

27
gnu/build/linux-modules.scm

@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2016, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014, 2016, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;;
;;; This file is part of GNU Guix.
@ -47,7 +47,8 @@
device-module-aliases
known-module-aliases
matching-modules))
matching-modules
missing-modules))
;;; Commentary:
;;;
@ -463,4 +464,26 @@ ALIAS is a string like \"scsi:t-0x00\" as returned by
module)))
known-aliases))
(define* (missing-modules device modules-provided)
"Assuming MODULES-PROVIDED lists kernel modules that are already
provided--e.g., in the initrd, return the list of missing kernel modules that
are required to access DEVICE."
(define aliases
;; Attempt to load 'modules.alias' from the current kernel, assuming we're
;; on Guix System, and assuming that corresponds to the kernel we'll be
;; installing.
(known-module-aliases))
(if aliases
(let* ((modules (delete-duplicates
(append-map (cut matching-modules <> aliases)
(device-module-aliases device))))
;; Module names (not file names) are supposed to use underscores
;; instead of hyphens. MODULES is a list of module names, whereas
;; LINUX-MODULES is file names without '.ko', so normalize them.
(provided (map file-name->module-name modules-provided)))
(remove (cut member <> provided) modules))
'()))
;;; linux-modules.scm ends here

55
gnu/system/mapped-devices.scm

@ -32,8 +32,7 @@
#:use-module (gnu system uuid)
#:autoload (gnu build file-systems) (find-partition-by-luks-uuid)
#:autoload (gnu build linux-modules)
(device-module-aliases matching-modules known-module-aliases
normalize-module-name file-name->module-name)
(missing-modules)
#:autoload (gnu packages cryptsetup) (cryptsetup-static)
#:autoload (gnu packages linux) (mdadm-static)
#:use-module (srfi srfi-1)
@ -118,37 +117,27 @@
(define (check-device-initrd-modules device linux-modules location)
"Raise an error if DEVICE needs modules beyond LINUX-MODULES to operate.
DEVICE must be a \"/dev\" file name."
(define aliases
;; Attempt to load 'modules.alias' from the current kernel, assuming we're
;; on Guix System, and assuming that corresponds to the kernel we'll be
;; installing. Skip the whole thing if that file cannot be read.
(define missing
;; Attempt to determine missing modules.
(catch 'system-error
(lambda ()
(known-module-aliases))
(const #f)))
(when aliases
(let* ((modules (delete-duplicates
(append-map (cut matching-modules <> aliases)
(device-module-aliases device))))
;; Module names (not file names) are supposed to use underscores
;; instead of hyphens. MODULES is a list of module names, whereas
;; LINUX-MODULES is file names without '.ko', so normalize them.
(provided (map file-name->module-name linux-modules))
(missing (remove (cut member <> provided) modules)))
(unless (null? missing)
;; Note: What we suggest here is a list of module names (e.g.,
;; "usb_storage"), not file names (e.g., "usb-storage.ko"). This is
;; OK because we have machinery that accepts both the hyphen and the
;; underscore version.
(raise (condition
(&message
(message (format #f (G_ "you may need these modules \
(missing-modules device linux-modules))
;; If we can't do that (e.g., EPERM), skip the whole thing.
(const '())))
(unless (null? missing)
;; Note: What we suggest here is a list of module names (e.g.,
;; "usb_storage"), not file names (e.g., "usb-storage.ko"). This is
;; OK because we have machinery that accepts both the hyphen and the
;; underscore version.
(raise (condition
(&message
(message (format #f (G_ "you may need these modules \
in the initrd for ~a:~{ ~a~}")
device missing)))
(&fix-hint
(hint (format #f (G_ "Try adding them to the
device missing)))
(&fix-hint
(hint (format #f (G_ "Try adding them to the
@code{initrd-modules} field of your @code{operating-system} declaration, along
these lines:
@ -161,9 +150,9 @@ these lines:
If you think this diagnostic is inaccurate, use the @option{--skip-checks}
option of @command{guix system}.\n")
missing)))
(&error-location
(location (source-properties->location location)))))))))
missing)))
(&error-location
(location (source-properties->location location)))))))
;;;

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