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gnu: linux-initrd: Add (guix build linux-initrd) and use it. 

* gnu/packages/linux-initrd.scm (qemu-initrd): Add #:modules argument.
  Factorize and move some of the code to...
* guix/build/linux-initrd.scm: ... here.  New file.
* Makefile.am (MODULES): Add it.
This commit is contained in:
Ludovic Courtès 2013-08-29 00:04:04 +02:00
parent e47185a4a7
commit 88840f0246
3 changed files with 127 additions and 56 deletions
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1
Makefile.am
View File

@ -61,6 +61,7 @@ MODULES = \
guix/build/cmake-build-system.scm \
guix/build/gnu-build-system.scm \
guix/build/gnu-dist.scm \
guix/build/linux-initrd.scm \
guix/build/perl-build-system.scm \
guix/build/python-build-system.scm \
guix/build/utils.scm \

75
gnu/packages/linux-initrd.scm
View File

@ -238,26 +238,17 @@ the Linux kernel.")
(define-public qemu-initrd
(expression->initrd
'(begin
(use-modules (rnrs io ports)
(srfi srfi-1)
(use-modules (srfi srfi-1)
(srfi srfi-26)
(ice-9 match)
((system foreign) #:select (string->pointer))
((system base compile) #:select (compile-file)))
((system base compile) #:select (compile-file))
(guix build linux-initrd))
(display "Welcome, this is GNU/Guile!\n")
(display "Welcome, this is GNU's early boot 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))
(mount-essential-file-systems)
(let* ((args (linux-command-line))
(option (lambda (opt)
(let ((opt (string-append opt "=")))
(and=> (find (cut string-prefix? opt <>)
@ -270,34 +261,13 @@ the Linux kernel.")
(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")))
(display "loading CIFS and companion modules...\n")
(for-each (compose load-linux-module*
(cut string-append "/modules/" <>))
(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))
(unless (configure-qemu-networking)
(display "network interface is DOWN\n"))
;; Prepare the real root file system under /root.
(unless (file-exists? "/root")
@ -305,27 +275,19 @@ the Linux kernel.")
(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")
(mount-essential-file-systems #:root "/root")
(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)))
(mknod "/root/dev/null" 'char-special #o666 (device-number 1 3))
(mknod "/root/dev/zero" 'char-special #o666 (device-number 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")))
(mount-qemu-smb-share "/store" "/root/nix/store")
(mount-qemu-smb-share "/xchg" "/root/xchg")
(if to-load
(begin
@ -346,6 +308,7 @@ the Linux kernel.")
(display "entering a warm and cozy REPL\n")
((@ (system repl repl) start-repl))))))
#:name "qemu-initrd"
#:modules '((guix build linux-initrd))
#:linux linux-libre
#:linux-modules '("cifs.ko" "md4.ko" "ecb.ko")))

107
guix/build/linux-initrd.scm Normal file
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@ -0,0 +1,107 @@
;;; 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 (guix build linux-initrd)
#:use-module (rnrs io ports)
#:use-module (system foreign)
#:export (mount-essential-file-systems
linux-command-line
configure-qemu-networking
mount-qemu-smb-share
load-linux-module*
device-number))
;;; Commentary:
;;;
;;; Utility procedures useful in a Linux initial RAM disk (initrd). Note that
;;; many of these use procedures not yet available in vanilla Guile (`mount',
;;; `load-linux-module', etc.); these are provided by a Guile patch used in
;;; the GNU distribution.
;;;
;;; Code:
(define* (mount-essential-file-systems #:key (root "/"))
"Mount /proc and /sys under ROOT."
(define (scope dir)
(string-append root
(if (string-suffix? "/" root)
""
"/")
dir))
(unless (file-exists? (scope "proc"))
(mkdir (scope "proc")))
(mount "none" (scope "proc") "proc")
(unless (file-exists? (scope "sys"))
(mkdir (scope "sys")))
(mount "none" (scope "sys") "sysfs"))
(define (linux-command-line)
"Return the Linux kernel command line as a list of strings."
(string-tokenize
(call-with-input-file "/proc/cmdline"
get-string-all)))
(define %host-qemu-ipv4-address
(inet-pton AF_INET "10.0.2.10"))
(define* (configure-qemu-networking #:optional (interface "eth0"))
"Setup the INTERFACE network interface and /etc/resolv.conf according to
QEMU's default networking settings (see net/slirp.c in QEMU for default
networking values.) Return #t if INTERFACE is up, #f otherwise."
(display "configuring QEMU networking...\n")
(let* ((sock (socket AF_INET SOCK_STREAM 0))
(address (make-socket-address AF_INET %host-qemu-ipv4-address 0))
(flags (network-interface-flags sock interface)))
(set-network-interface-address sock interface address)
(set-network-interface-flags sock interface (logior flags IFF_UP))
(unless (file-exists? "/etc")
(mkdir "/etc"))
(call-with-output-file "/etc/resolv.conf"
(lambda (p)
(display "nameserver 10.0.2.3\n" p)))
(logand (network-interface-flags sock interface) IFF_UP)))
(define (mount-qemu-smb-share share mount-point)
"Mount QEMU's CIFS/SMB SHARE at MOUNT-POINT.
Vanilla QEMU's `-smb' option just exports a /qemu share, whereas our
`qemu-with-multiple-smb-shares' package exports the /xchg and /store shares
(the latter allows the store to be shared between the host and guest.)"
(format #t "mounting QEMU's SMB share `~a'...\n" share)
(let ((server "10.0.2.4"))
(mount (string-append "//" server share) mount-point "cifs" 0
(string->pointer "guest,sec=none"))))
(define (load-linux-module* file)
"Load Linux module from FILE, the name of a `.ko' file."
(define (slurp module)
(call-with-input-file file get-bytevector-all))
(load-linux-module (slurp file)))
(define (device-number major minor)
"Return the device number for the device with MAJOR and MINOR, for use as
the last argument of `mknod'."
(+ (* major 256) minor))
;;; linux-initrd.scm ends here