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name: gnu/tests/linux-modules.scm 	 # note: path name is non-authoritative(*)

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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Jakob L. Kreuze <zerodaysfordays@sdf.org>
;;; Copyright © 2020 Danny Milosavljevic <dannym@scratchpost.org>
;;; Copyright © 2020 Brice Waegeneire <brice@waegenei.re>
;;;
;;; 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 tests linux-modules)
  #:use-module (gnu packages linux)
  #:use-module (gnu services)
  #:use-module (gnu services linux)
  #:use-module (gnu system)
  #:use-module (gnu system vm)
  #:use-module (gnu tests)
  #:use-module (guix derivations)
  #:use-module (guix gexp)
  #:use-module (guix modules)
  #:use-module (guix packages)
  #:use-module (guix monads)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (srfi srfi-1)
  #:export (%test-loadable-kernel-modules-0
            %test-loadable-kernel-modules-1
            %test-loadable-kernel-modules-2))

;;; Commentary:
;;;
;;; Test <operating-system> kernel-loadable-modules.
;;;
;;; Code:

(define* (modules-loaded?-program os modules)
  "Return an executable store item that, upon being evaluated, will verify
that MODULES are actually loaded."
  (program-file
   "verify-kernel-modules-loaded.scm"
   #~(begin
     (use-modules (ice-9 rdelim)
                  (ice-9 popen)
                  (srfi srfi-1)
                  (srfi srfi-13))
     (let* ((port (open-input-pipe (string-append #$kmod "/bin/lsmod")))
            (lines (string-split (read-string port) #\newline))
            (separators (char-set #\space #\tab))
            (modules (map (lambda (line)
                            (string-take line
                                         (or (string-index line separators)
                                             0)))
                          lines))
            (status (close-pipe port)))
       (and (= status 0)
            (and-map (lambda (module)
                       (member module modules string=?))
                     '#$modules))))))

(define* (run-loadable-kernel-modules-test modules)
  "Run a test of an OS having MODULES and verify that they are loaded in
memory."
  (define os
    (marionette-operating-system
     (operating-system
       (inherit (simple-operating-system))
       (services (cons* (service kernel-module-loader-service-type)
                        (service kernel-module-configuration-service-type
                                 modules)
                        (operating-system-user-services
                         (simple-operating-system)))))
     #:imported-modules '((guix combinators))))
  (define vm (virtual-machine os))
  (define (test script)
    (with-imported-modules '((gnu build marionette))
      #~(begin
          (use-modules (gnu build marionette)
                       (srfi srfi-64))
          (define marionette
            (make-marionette (list #$vm)))
          (mkdir #$output)
          (chdir #$output)
          (test-begin "loadable-kernel-modules")
          (test-assert "script successfully evaluated"
            (marionette-eval
             '(primitive-load #$script)
             marionette))
          (test-end)
          (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
  (let ((modules (filter-map (lambda (module)
                               (if (kernel-module-load? module)
                                   (kernel-module-name module)
                                   #f))
                      modules)))
    (gexp->derivation "loadable-kernel-modules"
                      (test (modules-loaded?-program os modules)))))

(define %test-loadable-kernel-modules-0
  (system-test
   (name "loadable-kernel-modules-0")
   (description "Tests loadable kernel modules facility of <operating-system>
with no extra modules.")
   (value (run-loadable-kernel-modules-test '()))))

(define %test-loadable-kernel-modules-1
  (system-test
   (name "loadable-kernel-modules-1")
   (description "Tests loadable kernel modules facility of <operating-system>
with one extra module.")
   (value (run-loadable-kernel-modules-test
           (list (kernel-module
                  (name "ddcci")
                  (package ddcci-driver-linux)
                  (options '("delay=606"))
                  (load? #t)))))))

(define %test-loadable-kernel-modules-2
  (system-test
   (name "loadable-kernel-modules-2")
   (description "Tests loadable kernel modules facility of <operating-system>
with two extra modules.")
   (value (run-loadable-kernel-modules-test
           (list (kernel-module
                  (name "ddcci")
                  ;; XXX Verify that kernel modules are built with the correct
                  ;; kernel
                  (package (package
                             (inherit ddcci-driver-linux)
                             (arguments
                              `(#:linux #f
                                ,@(strip-keyword-arguments '(#:linux)
                                                           (package-arguments
                                                            ddcci-driver-linux))))))
                  (load? #t))
                 (kernel-module
                  (name "acpi_call")
                  (package acpi-call-linux-module)
                  (load? #t))
                 ;; TODO Test that a module isn't loaded
                 (kernel-module
                  (name "radeon")
                  (blacklist? #t)))))))

debug log:

solving 296066e68f ...
found 296066e68f in https://yhetil.org/guix-patches/20200704185431.13739-7-brice@waegenei.re/
found 22e9a0c65c in https://yhetil.org/guix-patches/20200704185431.13739-3-brice@waegenei.re/
found 953b132ef7 in https://git.savannah.gnu.org/cgit/guix.git
preparing index
index prepared:
100644 953b132ef7be4fba1c818a8231e904df4f8b924d	gnu/tests/linux-modules.scm

applying [1/2] https://yhetil.org/guix-patches/20200704185431.13739-3-brice@waegenei.re/
diff --git a/gnu/tests/linux-modules.scm b/gnu/tests/linux-modules.scm
index 953b132ef7..22e9a0c65c 100644


applying [2/2] https://yhetil.org/guix-patches/20200704185431.13739-7-brice@waegenei.re/
diff --git a/gnu/tests/linux-modules.scm b/gnu/tests/linux-modules.scm
index 22e9a0c65c..296066e68f 100644

Checking patch gnu/tests/linux-modules.scm...
Applied patch gnu/tests/linux-modules.scm cleanly.
Checking patch gnu/tests/linux-modules.scm...
Applied patch gnu/tests/linux-modules.scm cleanly.

index at:
100644 296066e68f043672ce2e7d49349695d19ca7b15e	gnu/tests/linux-modules.scm

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