On Sun, Sep 13, 2020 at 07:46:01PM +0200, Stefan wrote:
> * gnu/bootloader/grub.scm (grub-efi-netboot-bootloader): New bootloader for
> network booting.
> (install-grub-efi-netboot): New bootloader installer for network booting.
> (grub-root-search): Set the root to "(tftp)" if the searched file is not stored
> on a local devices, i.e. an NFS share.
> ---
> gnu/bootloader/grub.scm | 97 ++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 96 insertions(+), 1 deletion(-)
>
> diff --git a/gnu/bootloader/grub.scm b/gnu/bootloader/grub.scm
> index e3febeefd0..552bc34f5a 100644
> --- a/gnu/bootloader/grub.scm
> +++ b/gnu/bootloader/grub.scm
> @@ -23,8 +23,10 @@
> ;;; along with GNU Guix. If not, see .
>
> (define-module (gnu bootloader grub)
> + #:use-module (guix build union)
> #:use-module (guix records)
> - #:use-module ((guix utils) #:select (%current-system))
> + #:use-module (guix store)
> + #:use-module ((guix utils) #:select (%current-system %current-target-system))
> #:use-module (guix gexp)
> #:use-module (gnu artwork)
> #:use-module (gnu bootloader)
> @@ -46,8 +48,11 @@
> grub-theme-color-highlight
> grub-theme-gfxmode
>
> + install-grub-efi-netboot
> +
> grub-bootloader
> grub-efi-bootloader
> + grub-efi-netboot-bootloader
> grub-mkrescue-bootloader
> grub-minimal-bootloader
>
> @@ -295,6 +300,9 @@ 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)
> + "set root=(tftp)")
> ((or #f (? string?))
> #~(format #f "search --file --set ~a" #$file)))))
>
> @@ -501,6 +509,87 @@ fi~%"))))
> "--bootloader-id=Guix"
> "--efi-directory" target-esp))))
>
> +(define (install-grub-efi-netboot subdir)
> + "Define a grub-efi-netboot bootloader installer for installation in SUBDIR,
> +which is usually efi/Guix or efi/boot."
> + (let* ((system (string-split (or (%current-target-system)
> + (%current-system))
> + #\-))
> + (boot-efi-link (match system
> + (("i686" _ ...) "/bootia32.efi")
> + (("x86_64" _ ...) "/bootx64.efi")
> + (("arm" _ ...) "/bootarm.efi")
> + (("armhf" _ ...) "/bootarm.efi")
> + (("aarch64" _ ...) "/bootaa64.efi")
> + (("riscv" _ ...) "/bootriscv32.efi")
> + (("riscv64" _ ...) "/bootriscv64.efi")))
Don't forget the fall-through case, even if it's just
((_ ...) "/bootTODO.efi")
> + (efi-bootloader (string-append (match system
> + (("i686" _ ...) "i386-efi")
> + (("x86_64" _ ...) "x86_64-efi")
> + (("arm" _ ...) "arm-efi")
> + (("armhf" _ ...) "arm-efi")
> + (("aarch64" _ ...) "arm64-efi")
> + (("riscv" _ ...) "riscv32-efi")
> + (("riscv64" _ ...) "riscv64-efi"))
> + "/core.efi")))
With the fall-through case here, can this be changed to
(("i686" _ ...) "i386-efi")
(("aarch64" _ ...) "arm64-efi")
(("riscv" _ ...) "riscv32-efi")
((_ ...) (string-append (first
(string-split
(nix-system->gnu-triplet
(or (%current-system)
(%current-target-system)))
#\_))
"-efi"))
> + (with-imported-modules
> + '((guix build union))
> + #~(lambda (bootloader target mount-point)
> + "Install the BOOTLOADER, which must be the package grub, as e.g.
> +bootx64.efi or bootarm64.efi into SUBDIR, which is usually efi/Guix or efi/boot,
> +below the directory TARGET for the system whose root is mounted at MOUNT-POINT.
> +
> +MOUNT-POINT is the last argument in 'guix system init /etc/config.scm mnt/point'
> +or '/' for other 'guix system' commands.
> +
> +TARGET is the target argument given to the bootloader-configuration in
> +(operating-system
> + (bootloader (bootloader-configuration
> + (target \"/boot\")
> + …))
> + …)
> +TARGET is required to be an absolute path and must be provided by a TFTP server
> +as the TFTP root directory.
> +
> +GRUB will load tftp://server/SUBDIR/grub.cfg and this file will instruct it to
> +load more files from the store like tftp://server/gnu/store/…-linux…/Image.
> +
> +To make this possible two symlinks will be created. The first symlink points
> +relatively form TARGET/SUBDIR/grub.cfg to /boot/grub/grub.cfg. And the second
> +symlink points relatively from TARGET/%store-prefix to %store-prefix.
> +
> +It is important to note that these symlinks need to be relativ, as the absolute
> +paths on the TFTP server side are unknown.
> +
> +It is also important to note that both symlinks will point outside the TFTP root
> +directory and that the TARGET/%store-prefix symlink makes the whole store
> +accessible via TFTP. Possibly the TFTP server must be configured
> +to allow accesses outside its TFTP root directory. This may need to be
> +considered for security aspects."
> + (use-modules ((guix build union) #:select (symlink-relative)))
> + (let* ((net-dir (string-append mount-point target "/"))
> + (sub-dir (string-append net-dir #$subdir "/"))
> + (store-link (string-append net-dir (%store-prefix)))
> + (grub-cfg "/boot/grub/grub.cfg")
> + (grub-cfg-link (string-append sub-dir (basename grub-cfg)))
> + (boot-efi-link (string-append sub-dir #$boot-efi-link)))
> + ;; Prepare the symlink to the store.
> + (mkdir-p (dirname store-link))
> + (false-if-exception (delete-file store-link))
> + (symlink-relative (%store-prefix) store-link)
> + ;; Prepare the symlink to the grub.cfg, which points into the store.
> + (false-if-exception (delete-file grub-cfg-link))
> + (symlink-relative grub-cfg grub-cfg-link)
> + ;; Install GRUB, which refers to the grub.cfg, with support for
> + ;; encrypted partitions,
> + (setenv "GRUB_ENABLE_CRYPTODISK" "y")
> + (invoke/quiet (string-append bootloader "/bin/grub-mknetdir")
> + (string-append "--net-directory=" net-dir)
> + (string-append "--subdir=" #$subdir))
> + ;; Prepare the bootloader symlink, which points to GRUB.
> + (false-if-exception (delete-file boot-efi-link))
> + (symlink #$efi-bootloader boot-efi-link))))))
> +
> ^L
>
> ;;;
> @@ -533,6 +622,12 @@ fi~%"))))
> (name 'grub-efi)
> (package grub-efi)))
>
> +(define grub-efi-netboot-bootloader
> + (bootloader
> + (inherit grub-efi-bootloader)
> + (name 'grub-efi-netboot-bootloader)
> + (installer (install-grub-efi-netboot "efi/Guix"))))
> +
> (define grub-mkrescue-bootloader
> (bootloader
> (inherit grub-efi-bootloader)
> --
> 2.26.0
>
>
>
>
--
Efraim Flashner אפרים פלשנר
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