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| author | Stefan <stefan-guix@vodafonemail.de> | 2020-09-14 14:20:16 +0200 |
|---|---|---|
| committer | Danny Milosavljevic <dannym@scratchpost.org> | 2020-09-14 14:25:04 +0200 |
| commit | 8c4f1aa85f3844fc8c989e74cef9d269dd30889c (patch) | |
| tree | d0db8f5d57cf799d3359a60d44f592c6251ac81b | |
| parent | f6807498bea9471dd7ef9b09359ba9077e7094e6 (diff) | |
gnu: grub: Support loading files from TFTP if the root filesystem is NFS.
* gnu/bootloader/grub.scm (grub-root-search): Set the root to "(tftp)" if
the searched-for file is stored on NFS.
| -rw-r--r-- | gnu/bootloader/grub.scm | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gnu/bootloader/grub.scm b/gnu/bootloader/grub.scm index e3febeefd0..f69bf8ed4d 100644 --- a/gnu/bootloader/grub.scm +++ b/gnu/bootloader/grub.scm @@ -295,6 +295,33 @@ code." ((? file-system-label? label) (format #f "search --label --set ~a" (file-system-label->string label))) + ((? (lambda (device) + (and (string? device) (string-contains device ":/"))) nfs-uri) + ;; This assumes that if your root file system is on NFS, then + ;; you also want to load your grub extra files, kernel and initrd + ;; from there. + ;; + ;; We explicitly set "root=(tftp)" here even though if grub.cfg + ;; had been loaded via TFTP, Grub would have set "root=(tftp)" + ;; automatically anyway. The reason is if you have a system that + ;; used to be on NFS but now is local, root would be set to local + ;; disk. If you then selected an older system generation that is + ;; supposed to boot from network in the Grub boot menu, Grub still + ;; wouldn't load those files from network otherwise. + ;; + ;; TFTP is preferred to HTTP because it is used more widely and + ;; specified in standards more widely--especially BOOTP/DHCPv4 + ;; defines a TFTP server for DHCP option 66, but not HTTP. + ;; + ;; Note: DHCPv6 specifies option 59 to contain a boot-file-url, + ;; which can contain a HTTP or TFTP URL. + ;; + ;; Note: It is assumed that the file paths are of a similar + ;; setup on both the TFTP server and the NFS server (it is + ;; not possible to search for files on TFTP). + ;; + ;; TODO: Allow HTTP. + "set root=(tftp)") ((or #f (? string?)) #~(format #f "search --file --set ~a" #$file))))) |