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system: Improve warning when using LUKS mapped devices without UUIDs.

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This corrects two problems with the previous mapped devices warning:

1. It wasn't clear how to correct the situation.
2. The output would be repeated multiple times, as many times as the procedure
is called during a system reconfigure.

* gnu/system.scm (operating-system-bootloader-crypto-devices): Memoize
procedure.  Include the mapped devices source location information in the
warnings.  Add a hint to help users fix the warning.
This commit is contained in:
Maxim Cournoyer 2022-05-14 01:30:44 -04:00
parent cb38c7c169
commit 39a9404c99
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GPG key ID: 1260E46482E63562
1 changed files with 24 additions and 19 deletions
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41
gnu/system.scm
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@ -33,6 +33,7 @@
(define-module (gnu system)
#:use-module (guix inferior)
#:use-module (guix store)
#:use-module (guix memoization)
#:use-module (guix monads)
#:use-module (guix gexp)
#:use-module (guix records)
@ -42,6 +43,7 @@ (define-module (gnu system)
#:use-module ((guix utils) #:select (substitute-keyword-arguments))
#:use-module (guix i18n)
#:use-module (guix diagnostics)
#:use-module (guix ui)
#:use-module (gnu packages admin)
#:use-module (gnu packages base)
#:use-module (gnu packages bash)
@ -78,11 +80,13 @@ (define-module (gnu system)
#:use-module (gnu system uuid)
#:use-module (gnu system file-systems)
#:use-module (gnu system mapped-devices)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-71)
#:use-module (rnrs bytevectors)
#:export (operating-system
operating-system?
@ -600,25 +604,26 @@ (define (operating-system-boot-mapped-devices os)
(any file-system-needed-for-boot? users)))
devices)))
(define (operating-system-bootloader-crypto-devices os)
"Return the subset of mapped devices that the bootloader must open.
Only devices specified by uuid are supported."
(define (valid-crypto-device? dev)
(or (uuid? dev)
(begin
(warning (G_ "\
mapped-device '~a' may not be mounted by the bootloader.~%")
dev)
#f)))
(filter-map (match-lambda
((and (= mapped-device-type type)
(= mapped-device-source source))
(and (eq? luks-device-mapping type)
(valid-crypto-device? source)
source))
(_ #f))
;; XXX: Ordering is important, we trust the returned one.
(define operating-system-bootloader-crypto-devices
(mlambdaq (os) ;to avoid duplicated output
"Return the sources of the LUKS mapped devices specified by UUID."
;; XXX: Device ordering is important, we trust the returned one.
(let* ((luks-devices (filter (lambda (m)
(eq? luks-device-mapping
(mapped-device-type m)))
(operating-system-boot-mapped-devices os)))
(uuid-crypto-devices non-uuid-crypto-devices
(partition (compose uuid? mapped-device-source)
luks-devices)))
(when (not (null? non-uuid-crypto-devices))
(for-each (lambda (dev)
(warning
(source-properties->location (mapped-device-location dev))
(G_ "mapped device '~a' may be ignored by bootloader~%")
(mapped-device-source dev)))
non-uuid-crypto-devices)
(display-hint "Specify mapped device sources via their LUKS UUID."))
(map mapped-device-source uuid-crypto-devices))))
(define (device-mapping-services os)
"Return the list of device-mapping services for OS as a list."