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gnu: linux-initrd: Allow the root file system to be volatile.

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* gnu/system/linux-initrd.scm (qemu-initrd): Add 'volatile-root?'
  parameter.
* guix/build/linux-initrd.scm (boot-system): Likewise.  Honor it.
This commit is contained in:
Ludovic Courtès 2014-01-31 14:26:30 +01:00
parent 70b33d81cf
commit 44ddf33ed5
2 changed files with 40 additions and 4 deletions
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9
gnu/system/linux-initrd.scm
View file

@ -191,6 +191,7 @@ list of Guile module names to be embedded in the initrd."
(define* (qemu-initrd #:key
guile-modules-in-chroot?
volatile-root?
(mounts `((cifs "/store" ,(%store-prefix))
(cifs "/xchg" "/xchg"))))
"Return a monadic derivation that builds an initrd for use in a QEMU guest
@ -202,7 +203,10 @@ be mounted atop the root file system, where each item has the form:
When GUILE-MODULES-IN-CHROOT? is true, make core Guile modules available in
the new root. This is necessary is the file specified as '--load' needs
access to these modules (which is the case if it wants to even just print an
exception and backtrace!)."
exception and backtrace!).
When VOLATILE-ROOT? is true, the root file system is writable but any changes
to it are lost."
(define cifs-modules
;; Modules needed to mount CIFS file systems.
'("md4.ko" "ecb.ko" "cifs.ko"))
@ -229,7 +233,8 @@ exception and backtrace!)."
(boot-system #:mounts ',mounts
#:linux-modules ',linux-modules
#:qemu-guest-networking? #t
#:guile-modules-in-chroot? ',guile-modules-in-chroot?))
#:guile-modules-in-chroot? ',guile-modules-in-chroot?
#:volatile-root? ',volatile-root?))
#:name "qemu-initrd"
#:modules '((guix build utils)
(guix build linux-initrd))