From 3b09332adf7ce8e976a4d117a62c586a53af04aa Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Sat, 29 Nov 2014 14:40:26 +0100 Subject: system: Add a 'needed-for-boot?' field to 'mapped-device'. * gnu/system/file-systems.scm ()[needed-for-boot?]: New field. * gnu/system.scm (operating-system-user-mapped-devices, operating-system-boot-mapped-devices): Use it instead of trying to guess. Guessing doesn't work when one refers to a partition using its label, for instance. * doc/guix.texi (Mapped Devices): Document 'needed-for-boot?'. --- doc/guix.texi | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'doc') diff --git a/doc/guix.texi b/doc/guix.texi index aad201771a..9aeec41f83 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -3837,19 +3837,27 @@ detailed below. Objects of this type represent device mappings that will be made when the system boots up. -@table @code -@item source +@table @asis +@item @code{source} This string specifies the name of the block device to be mapped, such as @code{"/dev/sda3"}. -@item target +@item @code{target} This string specifies the name of the mapping to be established. For example, specifying @code{"my-partition"} will lead to the creation of the @code{"/dev/mapper/my-partition"} device. -@item type +@item @code{type} This must be a @code{mapped-device-kind} object, which specifies how @var{source} is mapped to @var{target}. + +@item @code{needed-for-boot?} (default: @code{#f}) +This Boolean value indicates whether the device mapping must be made at +boot time---i.e., from the initial RAM disk, before any user file +systems are mounted. + +You would set it to @code{#t} for instance when the mapped device is +used by the root file system. @end table @end deftp -- cgit v1.2.3