mgainstaller: Add a module used to generate the Mageia Installer

v2: Add modules.description
v3: Add modules to go into modules.alias but then get rm'ed before
    actual build. This is needed for stage2 device probe

overlayfs is renamed to overlay from 3.19
Signed-off-by: Thomas Backlund <tmb@mageia.org>

3 files changed, 136 insertions, 0 deletions

diff --git a/modules.d/90mgainstaller/mgainstaller-mount-stage2.sh b/modules.d/90mgainstaller/mgainstaller-mount-stage2.sh
new file mode 100644
index 0000000..aa7200a
--- /dev/null
+++ b/modules.d/90mgainstaller/mgainstaller-mount-stage2.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+if [[ "$root" = "mgainstaller" ]]; then
+    mkdir -p /run/drakx
+
+    # Turn off kernel messages while we run stage1 (it messes up curses control)
+    stage1printk=
+    if [[ -f /proc/sys/kernel/printk ]]; then
+      stage1printk=$(cat /proc/sys/kernel/printk)
+      echo '0 0 0 0' >/proc/sys/kernel/printk
+    fi
+
+    # Run stage1 This ensures that stage2 is available and mounted on /tmp/stage2
+    # Note: We could run this later but it makes sense to do it at the "correct"
+    # time in the dracut init stage.
+    stage1rv="53" # 0x35
+    while [[ "$stage1rv" = "53" ]]; do
+      stage1
+      stage1rv=$?
+      if [[ "$stage1rv" = "66" ]]; then
+        # exit code 66 is "proceed" aka, run /sbin/init after doing some
+        # symlinking/bind mounts
+        >/run/drakx/run-init
+      fi
+    done
+
+    # Restore kernel messages
+    if [[ -n "$stage1printk" ]]; then
+      echo "$stage1printk" >/proc/sys/kernel/printk
+    fi
+
+    # Create a fake sysroot to please dracut and allow it to continue
+    # Our stage2 reuses the root environment provided by the initrd.
+    # We do not actually switch to a new root. Hence we hack over the switch_root
+    # command to allow dracut to continue as normal (shutting down udev etc.)
+    # before we take over again later. As there are no hook points at later
+    # stages, this is the cleanest way without modifying dracut itself
+
+    # /sysroot has to be a mountpoint
+    mount -t tmpfs -o mode=755,nodev,nosuid none /sysroot
+
+    # Fool usable_root()
+    mkdir -p /sysroot/dev
+    mkdir -p /sysroot/proc
+    mkdir -p /sysroot/sys
+
+    # Create a fake init (it will never be run)
+    mkdir -p /sysroot/sbin
+    >/sysroot/sbin/init
+    chmod  a+x /sysroot/sbin/init
+
+    # Inject our fake switch_root to run stage2
+    mv /usr/sbin/switch_root /usr/sbin/switch_root.real
+    ln -sf stage2-fake-switch_root /usr/sbin/switch_root
+fi
diff --git a/modules.d/90mgainstaller/module-setup.sh b/modules.d/90mgainstaller/module-setup.sh
new file mode 100755
index 0000000..987adde
--- /dev/null
+++ b/modules.d/90mgainstaller/module-setup.sh
@@ -0,0 +1,73 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+check() {
+    # an installer host-only image doesn't really make a lot of sense
+    [[ $hostonly ]] && return 1
+    return 255
+}
+
+depends() {
+    return 0
+}
+
+installkernel() {
+    instmods squashfs loop overlay
+
+    # This bit is a bit hacky. We need to install kernel modules we don't actually
+    # want. We will keep them until depmod is run, then rm them again.
+    if [[ "$DRAKX_FAKE_MODULES" && -f "$srcmods/modules.dep" ]]; then
+        fakemoddir="${initdir}/lib/modules/${kernel}/kernel/mageia-fake-modules"
+        mkdir -p "${fakemoddir}"
+        regexp="/("$(echo $DRAKX_FAKE_MODULES | sed 's/^[[:space:]]*\(.*[^ ]\)[[:space:]]*$/\1/' | sed 's/ /|/g')")\.ko"
+        modfiles=$(cut -d':' -f1 $srcmods/modules.dep | grep -E "$regexp" | xargs)
+        ( cd $srcmods/; cp -f $modfiles "${fakemoddir}/" )
+    fi
+    return 0
+}
+
+install() {
+    local _arch _libdir
+    _arch=$(uname -m)
+    _libdir=lib
+    if [ "x86_64" = "$_arch" ]; then
+      _libdir=lib64
+    fi
+
+    inst_simple "$srcmods/modules.description" "/lib/modules/$kernel/modules.description"
+    inst /usr/share/terminfo/l/linux /usr/share/terminfo/l/linux
+    inst /usr/share/ldetect-lst/pcitable.gz /usr/share/ldetect-lst/pcitable.gz
+    inst /usr/share/ldetect-lst/usbtable.gz /usr/share/ldetect-lst/usbtable.gz
+    inst /usr/share/pci.ids /usr/share/pci.ids
+    inst /usr/share/ldetect-lst/dkms-modules.alias /usr/share/ldetect-lst/dkms-modules.alias
+    inst /usr/share/ldetect-lst/fallback-modules.alias /usr/share/ldetect-lst/fallback-modules.alias
+    inst_libdir_file "libnss_dns.so*"
+    # below has /usr added...
+    inst /usr/lib/module-init-tools/ldetect-lst-modules.alias /usr/lib/module-init-tools/ldetect-lst-modules.alias
+
+    # To allow for debug build of stage1
+    if [ -n "$DRAKX_STAGE1_BINARY" -a -x "$DRAKX_STAGE1_BINARY" ]; then
+      inst "$DRAKX_STAGE1_BINARY" /usr/sbin/stage1
+    else
+      inst /usr/${_libdir}/drakx-installer-binaries/stage1 /usr/sbin/stage1
+    fi
+
+    if [ -n "$DRAKX_INIT_BINARY" -a -x "$DRAKX_INIT_BINARY" ]; then
+      inst "$DRAKX_INIT_BINARY" /usr/sbin/stage2-fake-switch_root
+    else
+      inst /usr/${_libdir}/drakx-installer-binaries/init /usr/sbin/stage2-fake-switch_root
+    fi
+
+    inst /usr/sbin/pppd-diet /usr/sbin/pppd
+    inst /usr/sbin/pppoe-diet /usr/sbin/pppoe
+
+    if [ "$_arch" != "ppc" -a "$_arch" != "ia64" ]; then
+      inst /etc/pcmcia/config.opts /etc/pcmcia/config.opts
+    fi
+
+    inst_hook cmdline 29 "$moddir/parse-mgainstaller.sh"
+    inst_hook mount 99 "$moddir/mgainstaller-mount-stage2.sh"
+
+    inst_multiple chmod mkdir ln
+}
diff --git a/modules.d/90mgainstaller/parse-mgainstaller.sh b/modules.d/90mgainstaller/parse-mgainstaller.sh
new file mode 100755
index 0000000..e074df9
--- /dev/null
+++ b/modules.d/90mgainstaller/parse-mgainstaller.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+root="mgainstaller" # quiet complaints from init
+rootok=1