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system: Set "rootfstype" for tmpfs root file system.

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This commit adds configuration for tmpfs root file system.  Since there's no
file system information in boot parameters, not all tmpfs cases are handled.

* gnu/system.scm (bootable-kernel-arguments): Check root file system for tmpfs
and set "rootfstype".

Change-Id: Ib14f6a9e4040535b3412ca9efa7e9b65c1dc8b39
This commit is contained in:
Hilton Chain 2025-05-14 21:35:31 +08:00
parent 9763543703
commit ce267b3765
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GPG key ID: ACC66D09CA528292
1 changed files with 15 additions and 6 deletions
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21
gnu/system.scm
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@ -208,12 +208,21 @@ VERSION is the target version of the boot-parameters record."
(let ((root (file-system-device->string root-device
#:uuid-type 'dce)))
(append
(if (string=? root "none")
'() ; Ignore the case where the root is "none" (typically tmpfs).
;; Note: Always use the DCE format because that's what
;; (gnu build linux-boot) expects for the 'root'
;; kernel command-line option.
(list (string-append (if version>0? "root=" "--root=") root)))
(cond
((string=? root "tmpfs")
;; Required when using tmpfs as root file system.
;; TODO: Include file system information in boot parameters, so that we
;; can detect tmpfs by file system type instead of device name here.
'("rootfstype=tmpfs"))
((string=? root "none")
;; Ignore unhandled cases where the root is "none". This requires the
;; user to set correct arguments.
'())
(else
;; Note: Always use the DCE format because that's what
;; (gnu build linux-boot) expects for the 'root'
;; kernel command-line option.
(list (string-append (if version>0? "root=" "--root=") root))))
(list #~(string-append (if #$version>0? "gnu.system=" "--system=") #$system)
#~(string-append (if #$version>0? "gnu.load=" "--load=")
#$system "/boot")))))