From c09bfd119f2ed3f1edf1bfbdf7a0beb1b2abea40 Mon Sep 17 00:00:00 2001
From: Dirk von Suchodoletz
Date: Sat, 15 Aug 2009 15:55:04 +0000
Subject: Re-enabling the functionality to boot from a local block device
 (mainly USB sticks). It allows for demonstration purposes and special setups
 to have the base filesystem locally (see related #156).

git-svn-id: http://svn.openslx.org/svn/openslx/openslx/trunk@3092 95ad53e4-c205-0410-b2fa-d234c58c8868
---
 initramfs/stage3-stuff/bin/dhcpmkconfig |  3 +++
 initramfs/stage3-stuff/bin/hwautocfg    |  5 +++++
 initramfs/stage3-stuff/etc/functions    | 23 +++++++++++++----------
 initramfs/stage3-stuff/etc/messages     |  8 ++++----
 initramfs/stage3-stuff/init             | 30 +++++++++++++++++++++++-------
 5 files changed, 48 insertions(+), 21 deletions(-)

diff --git a/initramfs/stage3-stuff/bin/dhcpmkconfig b/initramfs/stage3-stuff/bin/dhcpmkconfig
index 87e48683..c8c4d40c 100755
--- a/initramfs/stage3-stuff/bin/dhcpmkconfig
+++ b/initramfs/stage3-stuff/bin/dhcpmkconfig
@@ -23,6 +23,9 @@
 echo -e "# network configuration written by $0:" >/tmp/confviadhcp
 unset HOME IFS KCMDLINE DEBUGLEVEL MODPRV TERM BOOTIF BOOT_IMAGE \
        infomsg mask lease interface cfgmsg cfgfile boot_file no_bootsplash
+# set the broadcast address if not delivered by dhcp
+[ -z "$broadcast" ] && \
+  broadcast=$(ipcalc -b $ip/$subnet|sed s/.*=//)
 set | sed \
   -e "s,^P.*,,;s,ntpsrv,ntp_servers,;s,ip,clientip," \
   -e "s,serverid,serverip,;s,subnet,subnet_mask," \
diff --git a/initramfs/stage3-stuff/bin/hwautocfg b/initramfs/stage3-stuff/bin/hwautocfg
index 40b9e38c..d332e36b 100755
--- a/initramfs/stage3-stuff/bin/hwautocfg
+++ b/initramfs/stage3-stuff/bin/hwautocfg
@@ -39,6 +39,11 @@ ash /etc/modprobe.base; mdev -s
 ( usleep 100000 ; hwinfo --bios >/etc/hwinfo.bios ) &
 # for mounting partitions/devices with the "auto" option
 echo -e "ext3\next2\nreiserfs\nxfs\njfs\next4\nvfat" >/etc/filesystems
+# request a local block device for config and root filesystem (lbd://)
+if grep -iq '"lbd://' /proc/cmdline /etc/initramfs-setup; then
+  modprobe -a ${MODPRV} usb-storage sd_mod
+  mdev -s
+fi
 return 0
 }
 
diff --git a/initramfs/stage3-stuff/etc/functions b/initramfs/stage3-stuff/etc/functions
index 7731790c..51f5173b 100644
--- a/initramfs/stage3-stuff/etc/functions
+++ b/initramfs/stage3-stuff/etc/functions
@@ -369,8 +369,9 @@ local cfgfile
 if [ "x$filepath" != "x" ] ; then
   cfgfile=${filepath}
   [ "x$fileserv" = "x" ] && fileserv=$(checkip ${serverip})
-  # waiting for dns if fireserv is a name
-  echo ${fileserv} | grep -qi [a-z] && waitfor /tmp/dhcp-done 10000
+  # wait for dns if "fileserv" is a name and not lbd device
+  [ "$fileprot" != "lbd" ] && \
+    echo ${fileserv} | grep -qi [a-z] && waitfor /tmp/dhcp-done 10000
   [ $DEBUGLEVEL -ge 1 ] && echo "fileget -  fileprot:$fileprot, filepath:\
 $filepath, fileserv:$fileserv" >>$LOGFILE
   case "$fileprot" in
@@ -378,15 +379,17 @@ $filepath, fileserv:$fileserv" >>$LOGFILE
      wget_get $cfgfile $fileprot://$fileserv \
       && { unpack /tmp/$(basename $cfgfile) && break; } 2>>$LOGFILE 
    ;;
-   file)
+   lbd)
      local ldev=$fileserv
-     echo "Waiting for /mnt/etc ...."
-     waitfor /mnt/etc 10000
-     mkdir /tmp/$ldev
-     echo -e "ext2\nreiserfs\nvfat\nxfs" >/etc/filesystems
-     mount -o ro /dev/$ldev /tmp/$ldev || error "$init_errlfg"
-     unpack /tmp/$ldev/$cfgfile
-     umount /dev/$ldev
+     echo "Waiting for configuration file ${cfgfile} ...."
+     [ $DEBUGLEVEL -ge 1 ] && echo "fileget -  fileprot:$fileprot, filepath:\
+$filepath, fileserv:$fileserv" >>$LOGFILE
+     waitfor /mnt/${cfgfile} 10000
+     if [ -f /mnt/${cfgfile} ]; then
+       unpack /mnt/$cfgfile
+     else
+       error "$init_errlfg"
+     fi
    ;;
    *)
      tftp_get $cfgfile $fileserv  \
diff --git a/initramfs/stage3-stuff/etc/messages b/initramfs/stage3-stuff/etc/messages
index 918524b6..f6561f1f 100644
--- a/initramfs/stage3-stuff/etc/messages
+++ b/initramfs/stage3-stuff/etc/messages
@@ -78,10 +78,10 @@ init_cownobld="  Loading of cow module is of no sense if no network/other block
 device is used or\n  UnionFS/AUFS was specified as read write layer too. Remove \
 UnionFS/AUFS token from\n  kernel commandline if cowloop should be used instead."
 init_nfs="  Mount of root filesystem via NFS was requested via kernel command \
-line\nbut failed. There might be the following reasons for that:\n\
-* No nfs.ko module could be loaded and no NFS support was present in the\n\
-running kernel - see error messages above\n\
-* You tried to mount from wrong server or path ($nfsroot)\n\
+line\n  but failed. There might be the following reasons for that:\n  \
+* No nfs.ko module could be loaded and no NFS support was present in the\n  \
+running kernel - see error messages above\n  \
+* You tried to mount from wrong server or path ($nfsroot)\n  \
 * No NFS server is running or you do not have permissions"
 init_ldcfg="  Starting ldconfig - normally switched off. Enable it via kernel \
 cmdline option\n  'noldsc'. You might have/want to add additional library \
diff --git a/initramfs/stage3-stuff/init b/initramfs/stage3-stuff/init
index 3284ede7..962c657b 100755
--- a/initramfs/stage3-stuff/init
+++ b/initramfs/stage3-stuff/init
@@ -10,7 +10,7 @@
 #
 # General information about OpenSLX can be found at http://openslx.org
 #
-# Main script for initial ramdisk for OpenSLX linux stateless clients
+# Main script for initial ramfs for OpenSLX linux stateless clients
 #############################################################################
 
 # fixme: the primary init script should never fail, so move all critical code
@@ -273,10 +273,12 @@ line in $0\nnfsserver=\"${nfsserver}\"\nnfspath=\"${nfspath}\"" \
           #iscsiport=$(uri_token $rootfs port)
           #iscsitarget=$(uri_token $rootfs path)
         ;;
-        lbdev)
+        lbd)
           # use a local device for mounting root block device with given
-          # filesystem, e.g. rootfs=lbdev://sda2/squashfs
-          bldmod="sata_sil sd_mod"
+          # filesystem directly or a root filesystem container from another
+          # filesystem, e.g. rootfs=lbd://sda1/squashfs (bldmod cannot be
+          # empty, use loop or the real device stuff)
+          bldmod=loop
           blddev=$(uri_token $rootfs server)
           bldfst=$(uri_token $rootfs path)
           bldfst=${bldfst#/*}
@@ -331,7 +333,7 @@ EOF
 fi
 
 # check if at least one type of IP configuration is availabe
-if [ -n "$nodhcp" -a -z "$ldap" -a -z "$ipinfo" -a $srvproto != "lbdev" ]
+if [ -n "$nodhcp" -a -z "$ldap" -a -z "$ipinfo" -a $srvproto != "lbd" ]
   then echo -e "# You did not specify any advanced configuration mode for \
 your clients. You\n# might want to add the token 'dhcp' for DHCP config, \
 'file(=source)'\n# for config file get via TFTP or 'ldap(=source)' for LDAP \
@@ -462,7 +464,7 @@ if [ -z "$nodhcp" ] ; then
     fi
     # fixme: to be checked!!
     #  else
-    #    if [ -n "$file" -a "$srvproto" = "lbdev" ] ; then
+    #    if [ -n "$file" -a "$srvproto" = "lbd" ] ; then
     #      error "$init_erripcfg" nonfatal
     #    else
     #      error "$init_erripcfg"
@@ -585,9 +587,15 @@ if [ -n "${bldmod}" ] ; then
       echo noop > /sys/block/dnbd0/queue/scheduler
       echo 0 > /sys/block/dnbd0/queue/read_ahead_kb
       ;;
-    lbdev)
+    lbd)
       # using clients local block device (disk partition is to be specified)
+      set -x
       RDEV=/dev/$blddev
+      echo "$bldrfst" >>/etc/filesystems
+      realbldrfst=$bldrfst
+      # we might need to mount the base layer filesystem first before accessing
+      # e.g. a squashfs container file on it
+      bldrfst=auto
       ;;
   esac
   RWRO="ro"
@@ -623,6 +631,14 @@ if [ -n "${bldmod}" ] ; then
     usleep $i
     mount -n -t $bldrfst -o $RWRO $RDEV /mnt 2>/dev/null && break
   done
+  # check if we got the rootfilesystem directly or need to mount a container
+  # file from the mounted block device
+  if [ "${srvproto}" = "lbd" -a -f /mnt/boot/${slxconf_system_name} ]; then
+    mkdir /dev/bootdisk
+    mount --move /mnt /dev/bootdisk
+    mount -t ${realbldrfst} -o loop \
+      /dev/bootdisk/boot/${slxconf_system_name} /mnt
+  fi
   [ $DEBUGLEVEL -eq 20 ] && echo "** finished blockdev setup stuff at $(sysup)"
 elif [ -n ${iscsiserver} ] ; then
   [ $DEBUGLEVEL -eq 20 ] && echo "** started setting up iSCSI initiator at \
-- 
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