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| author | Ludovic Courtès <ludo@gnu.org> | 2016-04-18 00:23:16 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2016-04-18 01:24:06 +0200 |
| commit | ffba7d498d36618ad21af3961a1a685ae91bae57 (patch) | |
| tree | 5fbd5b0fbf82379ec5a03eaaabc9f8b58192f735 /gnu/system | |
| parent | 4da8c19e8337cbb908d5e77cd912791846070fb7 (diff) | |
| download | guix-ffba7d498d36618ad21af3961a1a685ae91bae57.tar guix-ffba7d498d36618ad21af3961a1a685ae91bae57.tar.gz | |
mapped-devices: LUKS partitions can be designated by their UUID.
* gnu/system/mapped-devices.scm (device-mapping-service-type): Add
'modules' and 'imported-modules' fields to 'shepherd-service'.
(open-luks-device): Use 'find-partition-by-luks-uuid' to lookup the
partition when SOURCE is a bytevector.
* gnu/system/linux-initrd.scm (base-initrd): Augment 'use-modules'
form.
* doc/guix.texi (Mapped Devices): Give example with a UUID.
Diffstat (limited to 'gnu/system')
| -rw-r--r-- | gnu/system/linux-initrd.scm | 9 | ||||
| -rw-r--r-- | gnu/system/mapped-devices.scm | 29 |
2 files changed, 33 insertions, 5 deletions
diff --git a/gnu/system/linux-initrd.scm b/gnu/system/linux-initrd.scm index aa9fbf6fe9..484bce71c4 100644 --- a/gnu/system/linux-initrd.scm +++ b/gnu/system/linux-initrd.scm @@ -229,7 +229,14 @@ loaded at boot time in the order in which they appear." (use-modules (gnu build linux-boot) (guix build utils) (guix build bournish) ;add the 'bournish' meta-command - (srfi srfi-26)) + (srfi srfi-26) + + ;; FIXME: The following modules are for + ;; LUKS-DEVICE-MAPPING. We should instead propagate + ;; this info via gexps. + ((gnu build file-systems) + #:select (find-partition-by-luks-uuid)) + (rnrs bytevectors)) (with-output-to-port (%make-void-port "w") (lambda () diff --git a/gnu/system/mapped-devices.scm b/gnu/system/mapped-devices.scm index 2706e255c5..450b4737ac 100644 --- a/gnu/system/mapped-devices.scm +++ b/gnu/system/mapped-devices.scm @@ -22,6 +22,7 @@ #:use-module (gnu services) #:use-module (gnu services shepherd) #:autoload (gnu packages cryptsetup) (cryptsetup) + #:use-module (srfi srfi-1) #:use-module (ice-9 match) #:export (mapped-device mapped-device? @@ -77,7 +78,16 @@ (documentation "Map a device node using Linux's device mapper.") (start #~(lambda () #$(open source target))) (stop #~(lambda _ (not #$(close source target)))) - (respawn? #f)))))) + (respawn? #f) + + ;; Add the modules needed by LUKS-DEVICE-MAPPING. + ;; FIXME: This info should be propagated via gexps. + (modules `((rnrs bytevectors) ;bytevector? + ((gnu build file-systems) + #:select (find-partition-by-luks-uuid)) + ,@%default-modules)) + (imported-modules `((gnu build file-systems) + ,@%default-imported-modules))))))) (define (device-mapping-service mapped-device) "Return a service that sets up @var{mapped-device}." @@ -91,9 +101,20 @@ (define (open-luks-device source target) "Return a gexp that maps SOURCE to TARGET as a LUKS device, using 'cryptsetup'." - #~(zero? (system* (string-append #$cryptsetup "/sbin/cryptsetup") - "open" "--type" "luks" - #$source #$target))) + #~(let ((source #$source)) + (zero? (system* (string-append #$cryptsetup "/sbin/cryptsetup") + "open" "--type" "luks" + + ;; Note: We cannot use the "UUID=source" syntax here + ;; because 'cryptsetup' implements it by searching the + ;; udev-populated /dev/disk/by-id directory but udev may + ;; be unavailable at the time we run this. + (if (bytevector? source) + (or (find-partition-by-luks-uuid source) + (error "LUKS partition not found" source)) + source) + + #$target)))) (define (close-luks-device source target) "Return a gexp that closes TARGET, a LUKS device." |