3 # Copyright (C) 2009 Red Hat Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 # This is called from the Makefile to build the initramfs.
46 # Decide on names for the final output. These have to match Makefile.am.
47 output=initramfs.@REPO@.@host_cpu@.img
48 koutput=vmlinuz.@REPO@.@host_cpu@
52 # Create the basic initramfs.
53 @FEBOOTSTRAP@ $modules -u @UPDATES@ @REPO@ initramfs @MIRROR@
55 # /sysroot is where the guest root filesystem will be mounted.
56 mkdir initramfs/sysroot
57 @FEBOOTSTRAP_RUN@ initramfs -- chmod 0777 /sysroot
59 # Create /tmp if it is missing.
60 mkdir -p initramfs/tmp
61 @FEBOOTSTRAP_RUN@ initramfs -- chmod 0777 /tmp
63 # Make a safe 'install_file' function to install files into the
64 # filesystem. XXX We need a 'febootstrap-install' utility.
65 # Usage: install_file <local-file> <target-pathname> mode owner[.group]
68 cp "$1" initramfs/"$2"
69 # Get the inode of the new file and remove it from fakeroot.log.
70 ino=$(ls -i initramfs/"$2" | awk '{print $1}')
71 cp initramfs/fakeroot.log fakeroot.log.old
72 grep -v "ino=$ino," fakeroot.log.old > initramfs/fakeroot.log
74 # Set mode, owner and group as desired.
75 @FEBOOTSTRAP_RUN@ initramfs -- chmod "$3" "$2"
76 @FEBOOTSTRAP_RUN@ initramfs -- chown "$4" "$2"
79 # Nuke some stuff. The kernel pulls mkinitrd and plymouth which pulls in
80 # all of Python. Sheez.
81 find initramfs -name '*plymouth*' -print0 | xargs -0 rm -rf
82 find initramfs -name '*python*' -print0 | xargs -0 rm -rf
84 # Modules take up nearly half of the image. It's a rough guess that
85 # we don't need many drivers (which take up most of the space).
86 find initramfs/lib/modules/*/kernel \
88 -a ! -name 'virtio.ko' \
89 -a ! -name 'virtio_net.ko' \
90 -a ! -name 'virtio_pci.ko' \
91 -a ! -name 'virtio_ring.ko' \
92 -a ! -name 'ext2.ko' \
93 -a ! -name 'ext4.ko' \
94 -a ! -name 'crc16.ko' \
95 -a ! -name 'jbd2.ko' \
96 -a ! -name 'fuse.ko' \
97 -a ! -name 'vfat.ko' \
100 -a ! -name 'crc_itu_t.ko' \
101 -a ! -name 'nls_utf8.ko' \
102 -a ! -name 'dm-*.ko' \
105 # Pull the kernel out into the current directory. We don't want it in
106 # the initramfs image.
107 mv initramfs/boot/vmlinuz* $koutput
108 rm -rf initramfs/boot
110 # Minimize the image.
111 @FEBOOTSTRAP_MINIMIZE@ initramfs
113 # Add some missing configuration files.
114 if [ ! -f initramfs/etc/hosts ]; then
115 cat > hosts.new <<'__EOF__'
116 127.0.0.1 guestfs localhost.localdomain localhost
117 ::1 localhost6.localdomain6 localhost6
119 install_file hosts.new /etc/hosts 0644 root.root
123 if [ ! -f initramfs/etc/fstab ]; then
124 @FEBOOTSTRAP_RUN@ initramfs -- touch /etc/fstab
127 echo nameserver 10.0.2.3 > resolv.conf.new
128 install_file resolv.conf.new /etc/resolv.conf 0644 root.root
131 # Create the init script.
132 cat > init.new <<'__EOF__'
134 PATH=/sbin:/usr/sbin:$PATH
135 MAKEDEV mem null port zero core full ram tty console fd \
136 hda hdb hdc hdd sda sdb sdc sdd loop sd
137 mount -t proc /proc /proc
138 mount -t sysfs /sys /sys
139 mount -t devpts -o gid=5,mode=620 /dev/pts /dev/pts
143 /sbin/ifconfig lo 127.0.0.1
144 /sbin/ifconfig eth0 10.0.2.10
145 /sbin/route add default gw 10.0.2.2
146 lvm vgscan --ignorelockingfailure
147 lvm vgchange -ay --ignorelockingfailure
151 install_file init.new /init 0755 root.root
154 # Copy the daemon into the filesystem.
155 install_file @abs_builddir@/daemon/guestfsd /sbin/guestfsd 0755 root.root
157 # Generate final image.
158 @FEBOOTSTRAP_TO_INITRAMFS@ initramfs > $output-t