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 GPG key = A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351 Confidentiality cannot be guaranteed on emails sent or received unencrypted