Package: guix-patches;
Reported by: 45mg <45mg.writes <at> gmail.com>
Date: Thu, 3 Apr 2025 17:48:01 UTC
Severity: normal
Tags: patch
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: 45mg <45mg.writes <at> gmail.com> To: guix-patches <at> gnu.org Cc: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>, soeren <at> soeren-tempel.net, Sisiutl <sisiutl <at> egregore.fun>, Ludovic Courtès <ludo <at> gnu.org>, 45mg <45mg.writes <at> gmail.com>, Hilton Chain <hako <at> ultrarare.space>, Tomas Volf <~@wolfsden.cz> Subject: [PATCH] mapped-devices/luks: Support extra options. Date: Thu, 3 Apr 2025 23:13:57 +0530
Allow passing extra options to the 'cryptsetup open' command.
* gnu/system/mapped-devices.scm (luks-device-mapping-with-options):
[#:extra-options]: New argument.
(open-luks-device): Use it.
* doc/guix.texi (Mapped Devices): Document it.
* gnu/tests/install.scm (%test-encrypted-root-extra-options-os): New
test for it, as well as the previously untested #:allow-discards?
option.
(%encrypted-root-extra-options-os): New os declaration for the test.
Change-Id: Ia9fd129d1c66cbf27abdd3064d59188083465247
---
CCing everyone who worked on the allow-discards option - this change is very
similar.
%encrypted-root-extra-options-os is copied from %encrypted-root-os; only
the mapped-devices field is changed. I wish I could avoid this code
duplication by having `(inherit %encrypted-root-os)` in the os
definition, but when I do that, the test fails with this error in the
build log:
/mnt/etc/config.scm:1:100: error: %encrypted-root-os: unbound variable
Any chance you Guile wizards know how to make this work?
doc/guix.texi | 20 ++++++++++-
gnu/system/mapped-devices.scm | 25 ++++++++-----
gnu/tests/install.scm | 68 +++++++++++++++++++++++++++++++++++
3 files changed, 104 insertions(+), 9 deletions(-)
diff --git a/doc/guix.texi b/doc/guix.texi
index bcb1f9d9cf..9cd1304522 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -18461,7 +18461,7 @@ Mapped Devices
@code{dm-crypt} Linux kernel module.
@end defvar
-@deffn {Procedure} luks-device-mapping-with-options [#:key-file #:allow-discards?]
+@deffn {Procedure} luks-device-mapping-with-options [#:key-file #:allow-discards? #:extra-options]
Return a @code{luks-device-mapping} object, which defines LUKS block
device encryption using the @command{cryptsetup} command from the
package with the same name. It relies on the @code{dm-crypt} Linux
@@ -18492,6 +18492,24 @@ Mapped Devices
information, refer to the description of the @code{--allow-discards}
option in the @code{cryptsetup-open(8)} man page.
+@code{extra-options} may be used to specify a list of additional
+command-line options for the @code{cryptsetup open} command. See the
+@code{cryptsetup-open(8)} man page for a list of supported options.
+
+For example, here is how you could specify the
+@code{--perf-no_read_workqueue} and @code{--perf-no_write_workqueue}
+options, along with @code{--allow-discards}:
+
+@lisp
+(mapped-device
+ (source "/dev/sdb1)
+ (target "data)
+ (type (luks-device-mapping-with-options
+ #:allow-discards? #t
+ #:extra-options '("--perf-no_read_workqueue"
+ "--perf-no_write_workqueue"))))
+@end lisp
+
@end deffn
@defvar raid-device-mapping
diff --git a/gnu/system/mapped-devices.scm b/gnu/system/mapped-devices.scm
index 667a495570..520ade9ef8 100644
--- a/gnu/system/mapped-devices.scm
+++ b/gnu/system/mapped-devices.scm
@@ -194,10 +194,12 @@ (define (check-device-initrd-modules device linux-modules location)
;;; Common device mappings.
;;;
-(define* (open-luks-device source targets #:key key-file allow-discards?)
+(define* (open-luks-device source targets
+ #:key key-file allow-discards? extra-options)
"Return a gexp that maps SOURCE to TARGET as a LUKS device, using
'cryptsetup'. When ALLOW-DISCARDS? is true, the use of discard (TRIM)
-requests is allowed for the underlying device."
+requests is allowed for the underlying device. EXTRA-OPTIONS is a list of
+additional options to be passed to the 'cryptsetup open' command."
(with-imported-modules (source-module-closure
'((gnu build file-systems)
(guix build utils))) ;; For mkdir-p
@@ -238,10 +240,15 @@ (define* (open-luks-device source targets #:key key-file allow-discards?)
(let ((cryptsetup #$(file-append cryptsetup-static
"/sbin/cryptsetup"))
(cryptsetup-flags (cons*
- "open" "--type" "luks" partition #$target
- (if #$allow-discards?
- '("--allow-discards")
- '()))))
+ "open" "--type" "luks"
+ (append
+ (if #$allow-discards?
+ '("--allow-discards")
+ '())
+ (if (pair? '#$extra-options)
+ '#$extra-options
+ '())
+ (list partition #$target)))))
;; We want to fallback to the password unlock if the keyfile
;; fails.
(or (and keyfile
@@ -290,7 +297,8 @@ (define luks-device-mapping
((gnu build file-systems)
#:select (find-partition-by-luks-uuid system*/tty))))))
-(define* (luks-device-mapping-with-options #:key key-file allow-discards?)
+(define* (luks-device-mapping-with-options
+ #:key key-file allow-discards? extra-options)
"Return a luks-device-mapping object with open modified to pass the arguments
into the open-luks-device procedure."
(mapped-device-kind
@@ -298,7 +306,8 @@ (define* (luks-device-mapping-with-options #:key key-file allow-discards?)
(open (λ (source targets)
(open-luks-device source targets
#:key-file key-file
- #:allow-discards? allow-discards?)))))
+ #:allow-discards? allow-discards?
+ #:extra-options extra-options)))))
(define (open-raid-device sources targets)
"Return a gexp that assembles SOURCES (a list of devices) to the RAID device
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index a837637b18..fd9f17eb4d 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -68,6 +68,7 @@ (define-module (gnu tests install)
%test-separate-home-os
%test-raid-root-os
%test-encrypted-root-os
+ %test-encrypted-root-extra-options-os
%test-encrypted-home-os
%test-encrypted-home-os-key-file
%test-encrypted-root-not-boot-os
@@ -843,6 +844,73 @@ (define %test-encrypted-root-os
(run-basic-test %encrypted-root-os command "encrypted-root-os"
#:initialization enter-luks-passphrase)))))
+
+;;;
+;;; LUKS-encrypted root with extra options: --allow-discards,
+;;; --perf-no_read_workqueue and --perf-no_write_workqueue
+;;;
+
+;; Except for the 'mapped-devices' field, this is exactly the same as
+;; %encrypted-root-os.
+(define-os-with-source (%encrypted-root-extra-options-os
+ %encrypted-root-extra-options-os-source)
+ ;; The OS we want to install.
+ (use-modules (gnu) (gnu tests) (srfi srfi-1))
+
+ (operating-system
+ (host-name "liberigilo")
+ (timezone "Europe/Paris")
+ (locale "en_US.UTF-8")
+
+ (bootloader (bootloader-configuration
+ (bootloader grub-bootloader)
+ (targets '("/dev/vdb"))))
+
+ ;; Note: Do not pass "console=ttyS0" so we can use our passphrase prompt
+ ;; detection logic in 'enter-luks-passphrase'.
+
+ (mapped-devices (list (mapped-device
+ (source (uuid "12345678-1234-1234-1234-123456789abc"))
+ (target "the-root-device")
+ (type (luks-device-mapping-with-options
+ #:allow-discards? #t
+ #:extra-options
+ '("--perf-no_read_workqueue"
+ "--perf-no_write_workqueue"))))))
+ (file-systems (cons (file-system
+ (device "/dev/mapper/the-root-device")
+ (mount-point "/")
+ (type "ext4"))
+ %base-file-systems))
+ (users (cons (user-account
+ (name "charlie")
+ (group "users")
+ (supplementary-groups '("wheel" "audio" "video")))
+ %base-user-accounts))
+ (services (cons (service marionette-service-type
+ (marionette-configuration
+ (imported-modules '((gnu services herd)
+ (guix combinators)))))
+ %base-services))))
+
+(define %test-encrypted-root-extra-options-os
+ (system-test
+ (name "encrypted-root-extra-options-os")
+ (description
+ "Test basic functionality of an OS installed like one would do by hand,
+with an LUKS-encrypted root partition opened with extra options
+(--allow-discards, --perf-no_read_workqueue and --perf-no_write_workqueue).
+This test is expensive in terms of CPU and storage usage since we need to
+build (current-guix) and then store a couple of full system images.")
+ (value
+ (mlet* %store-monad ((images (run-install %encrypted-root-extra-options-os
+ %encrypted-root-extra-options-os-source
+ #:script
+ %encrypted-root-installation-script))
+ (command (qemu-command* images)))
+ (run-basic-test %encrypted-root-os command "encrypted-root-extra-options-os"
+ #:initialization enter-luks-passphrase)))))
+
;;;
;;; Separate /home on LVM
base-commit: 4ea012fc6ddcb32574fbd4a854b11808c34fbca8
--
2.49.0
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