gnu: Add support for Guile in Linux initrd.
* gnu/packages/linux-initrd.scm: New file.
This commit is contained in:
Ludovic Courtès
parent
106ca9d0c1
commit
3855e242a2
|
|
@ -107,6 +107,7 @@ MODULES = \
|
|||
gnu/packages/libusb.scm \
|
||||
gnu/packages/libunwind.scm \
|
||||
gnu/packages/linux.scm \
|
||||
gnu/packages/linux-initrd.scm \
|
||||
gnu/packages/lout.scm \
|
||||
gnu/packages/lsh.scm \
|
||||
gnu/packages/m4.scm \
|
||||
|
|
|
|||
|
|
@ -0,0 +1,288 @@
|
|||
;;; GNU Guix --- Functional package management for GNU
|
||||
;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
|
||||
;;;
|
||||
;;; This file is part of GNU Guix.
|
||||
;;;
|
||||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||||
;;; under the terms of the GNU General Public License as published by
|
||||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||||
;;; your option) any later version.
|
||||
;;;
|
||||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
;;; GNU General Public License for more details.
|
||||
;;;
|
||||
;;; You should have received a copy of the GNU General Public License
|
||||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
(define-module (gnu packages linux-initrd)
|
||||
#:use-module (guix utils)
|
||||
#:use-module (guix licenses)
|
||||
#:use-module (gnu packages)
|
||||
#:use-module (gnu packages cpio)
|
||||
#:use-module (gnu packages compression)
|
||||
#:use-module (gnu packages linux)
|
||||
#:use-module ((gnu packages make-bootstrap)
|
||||
#:select (%guile-static-stripped))
|
||||
#:use-module (guix packages)
|
||||
#:use-module (guix download)
|
||||
#:use-module (guix build-system trivial))
|
||||
|
||||
|
||||
;;; Commentary:
|
||||
;;;
|
||||
;;; Tools to build initial RAM disks (initrd's) for Linux-Libre, and in
|
||||
;;; particular initrd's that run Guile.
|
||||
;;;
|
||||
;;; Code:
|
||||
|
||||
|
||||
(define* (expression->initrd exp
|
||||
#:key
|
||||
(guile %guile-static-stripped)
|
||||
(cpio cpio)
|
||||
(gzip gzip)
|
||||
(name "guile-initrd")
|
||||
(system (%current-system))
|
||||
(linux #f)
|
||||
(linux-modules '()))
|
||||
"Return a package that contains a Linux initrd (a gzipped cpio archive)
|
||||
containing GUILE and that evaluates EXP upon booting. LINUX-MODULES is a list
|
||||
of `.ko' file names to be copied from LINUX into the initrd."
|
||||
;; TODO: Add a `modules' parameter.
|
||||
|
||||
;; General Linux overview in `Documentation/early-userspace/README' and
|
||||
;; `Documentation/filesystems/ramfs-rootfs-initramfs.txt'.
|
||||
|
||||
(define builder
|
||||
`(begin
|
||||
(use-modules (guix build utils)
|
||||
(ice-9 pretty-print)
|
||||
(ice-9 popen)
|
||||
(ice-9 match)
|
||||
(ice-9 ftw)
|
||||
(srfi srfi-26)
|
||||
(system base compile)
|
||||
(rnrs bytevectors)
|
||||
((system foreign) #:select (sizeof)))
|
||||
|
||||
(let ((guile (assoc-ref %build-inputs "guile"))
|
||||
(cpio (string-append (assoc-ref %build-inputs "cpio")
|
||||
"/bin/cpio"))
|
||||
(gzip (string-append (assoc-ref %build-inputs "gzip")
|
||||
"/bin/gzip"))
|
||||
(out (assoc-ref %outputs "out")))
|
||||
(mkdir out)
|
||||
(mkdir "contents")
|
||||
(with-directory-excursion "contents"
|
||||
(copy-recursively guile ".")
|
||||
(call-with-output-file "init"
|
||||
(lambda (p)
|
||||
(format p "#!/bin/guile -ds~%!#~%" guile)
|
||||
(pretty-print ',exp p)))
|
||||
(chmod "init" #o555)
|
||||
(chmod "bin/guile" #o555)
|
||||
|
||||
;; Compile `init'.
|
||||
(let ((go-dir (format #f ".cache/guile/ccache/~a-~a-~a-~a"
|
||||
(effective-version)
|
||||
(if (eq? (native-endianness) (endianness little))
|
||||
"LE"
|
||||
"BE")
|
||||
(sizeof '*)
|
||||
(effective-version))))
|
||||
(mkdir-p go-dir)
|
||||
(compile-file "init"
|
||||
#:opts %auto-compilation-options
|
||||
#:output-file (string-append go-dir "/init.go")))
|
||||
|
||||
(let* ((linux (assoc-ref %build-inputs "linux"))
|
||||
(module-dir (and linux
|
||||
(string-append linux "/lib/modules"))))
|
||||
(mkdir "modules")
|
||||
,@(map (lambda (module)
|
||||
`(match (find-files module-dir ,module)
|
||||
((file)
|
||||
(format #t "copying '~a'...~%" file)
|
||||
(copy-file file (string-append "modules/"
|
||||
,module)))
|
||||
(()
|
||||
(error "module not found" ,module module-dir))
|
||||
((_ ...)
|
||||
(error "several modules by that name"
|
||||
,module module-dir))))
|
||||
linux-modules))
|
||||
|
||||
;; Reset the timestamps of all the files that will make it in the
|
||||
;; initrd.
|
||||
(for-each (cut utime <> 0 0 0 0)
|
||||
(find-files "." ".*"))
|
||||
|
||||
(system* cpio "--version")
|
||||
(let ((pipe (open-pipe* OPEN_WRITE cpio "-o"
|
||||
"-O" (string-append out "/initrd")
|
||||
"-H" "newc" "--null")))
|
||||
(define print0
|
||||
(let ((len (string-length "./")))
|
||||
(lambda (file)
|
||||
(format pipe "~a\0" (string-drop file len)))))
|
||||
|
||||
;; Note: as per `ramfs-rootfs-initramfs.txt', always add
|
||||
;; directory entries before the files that are inside of it: "The
|
||||
;; Linux kernel cpio extractor won't create files in a directory
|
||||
;; that doesn't exist, so the directory entries must go before
|
||||
;; the files that go in those directories."
|
||||
(file-system-fold (const #t)
|
||||
(lambda (file stat result) ; leaf
|
||||
(print0 file))
|
||||
(lambda (dir stat result) ; down
|
||||
(unless (string=? dir ".")
|
||||
(print0 dir)))
|
||||
(const #f) ; up
|
||||
(const #f) ; skip
|
||||
(const #f)
|
||||
#f
|
||||
".")
|
||||
|
||||
(and (zero? (close-pipe pipe))
|
||||
(with-directory-excursion out
|
||||
(and (zero? (system* gzip "--best" "initrd"))
|
||||
(rename-file "initrd.gz" "initrd")))))))))
|
||||
|
||||
(let ((name* name))
|
||||
(package
|
||||
(name name*)
|
||||
(version "0")
|
||||
(source #f)
|
||||
(build-system trivial-build-system)
|
||||
(arguments `(#:modules ((guix build utils))
|
||||
#:builder ,builder))
|
||||
(inputs `(("guile" ,guile)
|
||||
("cpio" ,cpio)
|
||||
("gzip" ,gzip)
|
||||
,@(if linux
|
||||
`(("linux" ,linux))
|
||||
'())))
|
||||
(synopsis "An initial RAM disk (initrd) for the Linux kernel")
|
||||
(description
|
||||
"An initial RAM disk (initrd), really a gzipped cpio archive, for use by
|
||||
the Linux kernel.")
|
||||
(license gpl3+)
|
||||
(home-page "http://www.gnu.org/software/guix/"))))
|
||||
|
||||
(define-public qemu-initrd
|
||||
(expression->initrd
|
||||
'(begin
|
||||
(use-modules (rnrs io ports)
|
||||
(srfi srfi-1)
|
||||
(srfi srfi-26)
|
||||
(ice-9 match)
|
||||
((system foreign) #:select (string->pointer))
|
||||
((system base compile) #:select (compile-file)))
|
||||
|
||||
(display "Welcome, this is GNU/Guile!\n")
|
||||
(display "Use '--repl' for an initrd REPL.\n\n")
|
||||
|
||||
(mkdir "/proc")
|
||||
(mount "none" "/proc" "proc")
|
||||
|
||||
(mkdir "/sys")
|
||||
(mount "none" "/sys" "sysfs")
|
||||
|
||||
(let* ((command (string-trim-both
|
||||
(call-with-input-file "/proc/cmdline"
|
||||
get-string-all)))
|
||||
(args (string-split command char-set:blank))
|
||||
(option (lambda (opt)
|
||||
(let ((opt (string-append opt "=")))
|
||||
(and=> (find (cut string-prefix? opt <>)
|
||||
args)
|
||||
(lambda (arg)
|
||||
(substring arg (+ 1 (string-index arg #\=))))))))
|
||||
(to-load (option "--load"))
|
||||
(root (option "--root")))
|
||||
|
||||
(when (member "--repl" args)
|
||||
((@ (system repl repl) start-repl)))
|
||||
|
||||
(let ((slurp (lambda (module)
|
||||
(call-with-input-file
|
||||
(string-append "/modules/" module)
|
||||
get-bytevector-all))))
|
||||
(display "loading CIFS and companion modules...\n")
|
||||
(for-each (compose load-linux-module slurp)
|
||||
(list "md4.ko" "ecb.ko" "cifs.ko")))
|
||||
|
||||
;; See net/slirp.c for default QEMU networking values.
|
||||
(display "configuring network...\n")
|
||||
(let* ((sock (socket AF_INET SOCK_STREAM 0))
|
||||
(address (make-socket-address AF_INET
|
||||
(inet-pton AF_INET
|
||||
"10.0.2.10")
|
||||
0))
|
||||
(flags (network-interface-flags sock "eth0")))
|
||||
(set-network-interface-address sock "eth0" address)
|
||||
(set-network-interface-flags sock "eth0"
|
||||
(logior flags IFF_UP))
|
||||
(if (logand (network-interface-flags sock "eth0") IFF_UP)
|
||||
(display "network interface is up\n")
|
||||
(display "network interface is DOWN\n"))
|
||||
|
||||
(mkdir "/etc")
|
||||
(call-with-output-file "/etc/resolv.conf"
|
||||
(lambda (p)
|
||||
(display "nameserver 10.0.2.3\n" p)))
|
||||
(sleep 1))
|
||||
|
||||
;; Prepare the real root file system under /root.
|
||||
(unless (file-exists? "/root")
|
||||
(mkdir "/root"))
|
||||
(if root
|
||||
(mount root "/root" "ext3")
|
||||
(mount "none" "/root" "tmpfs"))
|
||||
(mkdir "/root/proc")
|
||||
(mount "none" "/root/proc" "proc")
|
||||
(mkdir "/root/sys")
|
||||
(mount "none" "/root/sys" "sysfs")
|
||||
(mkdir "/root/xchg")
|
||||
(mkdir "/root/nix")
|
||||
(mkdir "/root/nix/store")
|
||||
|
||||
(mkdir "/root/dev")
|
||||
(let ((makedev (lambda (major minor)
|
||||
(+ (* major 256) minor))))
|
||||
(mknod "/root/dev/null" 'char-special #o666 (makedev 1 3))
|
||||
(mknod "/root/dev/zero" 'char-special #o666 (makedev 1 5)))
|
||||
|
||||
;; Mount the host's store and exchange directory.
|
||||
(display "mounting QEMU's SMB shares...\n")
|
||||
(let ((server "10.0.2.4"))
|
||||
(mount (string-append "//" server "/store") "/root/nix/store" "cifs" 0
|
||||
(string->pointer "guest,sec=none"))
|
||||
(mount (string-append "//" server "/xchg") "/root/xchg" "cifs" 0
|
||||
(string->pointer "guest,sec=none")))
|
||||
|
||||
(if to-load
|
||||
(begin
|
||||
(format #t "loading boot file '~a'...\n" to-load)
|
||||
(compile-file (string-append "/root/" to-load)
|
||||
#:output-file "/root/loader.go"
|
||||
#:opts %auto-compilation-options)
|
||||
(match (primitive-fork)
|
||||
(0
|
||||
(chroot "/root")
|
||||
(load-compiled "/loader.go"))
|
||||
(pid
|
||||
(format #t "boot file loaded under PID ~a~%" pid)
|
||||
(let ((status (waitpid pid)))
|
||||
(reboot)))))
|
||||
(begin
|
||||
(display "no boot file passed via '--load'\n")
|
||||
(display "entering a warm and cozy REPL\n")
|
||||
((@ (system repl repl) start-repl))))))
|
||||
#:name "qemu-initrd"
|
||||
#:linux linux-libre
|
||||
#:linux-modules '("cifs.ko" "md4.ko" "ecb.ko")))
|
||||
|
||||
;;; linux-initrd.scm ends here
|
||||
Loading…
Reference in New Issue