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  2. #!/bin/busybox sh
  4. rescue_shell() {
  5. echo "$@"
  6. echo "Something went wrong. Dropping you to a shell."
  7. /bin/busybox --install -s
  8. exec /bin/sh
  9. }
  11. # allow the use of UUIDs or filesystem lables
  12. uuidlabel_root() {
  13. for cmd in $(cat /proc/cmdline) ; do
  14. case $cmd in
  15. root=*)
  16. type=$(echo $cmd | cut -d= -f2)
  17. echo "Mounting rootfs"
  18. if [ $type == "LABEL" ] || [ $type == "UUID" ] ; then
  19. uuid=$(echo $cmd | cut -d= -f3)
  20. mount -o ro $(findfs "$type"="$uuid") /mnt/root
  21. else
  22. mount -o ro $(echo $cmd | cut -d= -f2) /mnt/root
  23. fi
  24. ;;
  25. esac
  26. done
  27. }
  29. check_filesystem() {
  30. # most of code coming from /etc/init.d/fsck
  32. local fsck_opts= check_extra= RC_UNAME=$(uname -s)
  34. # FIXME : get_bootparam forcefsck
  35. if [ -e /forcefsck ]; then
  36. fsck_opts="$fsck_opts -f"
  37. check_extra="(check forced)"
  38. fi
  40. echo "Checking local filesystem $check_extra : $1"
  42. if [ "$RC_UNAME" = Linux ]; then
  43. fsck_opts="$fsck_opts -C0 -T"
  44. fi
  46. trap : INT QUIT
  48. # using our own fsck, not the builtin one from busybox
  49. /sbin/fsck -p $fsck_opts $1
  51. ret_val=$?
  52. case $ret_val in
  53. 0) return 0;;
  54. 1) echo "Filesystem repaired"; return 0;;
  55. 2|3) if [ "$RC_UNAME" = Linux ]; then
  56. echo "Filesystem repaired, but reboot needed"
  57. reboot -f
  58. else
  59. rescue_shell "Filesystem still have errors; manual fsck required"
  60. fi;;
  61. 4) if [ "$RC_UNAME" = Linux ]; then
  62. rescue_shell "Fileystem errors left uncorrected, aborting"
  63. else
  64. echo "Filesystem repaired, but reboot needed"
  65. reboot
  66. fi;;
  67. 8) echo "Operational error"; return 0;;
  68. 16) echo "Use or Syntax Error"; return 16;;
  69. 32) echo "fsck interrupted";;
  70. 127) echo "Shared Library Error"; sleep 20; return 0;;
  71. *) echo $ret_val; echo "Some random fsck error - continuing anyway"; sleep 20; return 0;;
  72. esac
  74. # rescue_shell can't find tty so its broken
  75. rescue_shell
  76. }
  78. # start for real here
  80. # temporarily mount proc and sys
  81. mount -t proc none /proc
  82. mount -t sysfs none /sys
  83. mount -t devtmpfs none /dev
  85. # disable kernel messages from popping onto the screen
  86. ###echo 0 > /proc/sys/kernel/printk
  87. # clear the screen
  88. ###clear
  91. # /boot
  92. /sbin/mdadm --assemble /dev/md0 --uuid=bc38405f:83693026:825019f1:97c4f6e3
  93. # old d678d02e-28ab-84e0-c44c-77eb7ee19756
  94. # new UUID : bc38405f:83693026:825019f1:97c4f6e3 (local to host NeddySeagoon_Static)
  96. # don't care if /boot fails to assemble
  98. # / the host LVM
  99. /sbin/mdadm --assemble /dev/md1 --uuid=62120388:98bfb6f0:b65341f6:6b93d69f || rescue_shell
  101. # old ad5fe0cb-775d-38b4-7169-e221fc96089f
  102. # new Array UUID : 62120388:98bfb6f0:b65341f6:6b93d69f
  104. # if root won't assemble, we are stuck
  106. # the KVM LVM
  107. /sbin/mdadm --assemble /dev/md2 --uuid=75d75d6a:9947df3c:5e50eaf5:5f8d22b7
  108. #old 52be4797:edab2349:eb21497e:52035eaa
  110. # new Array UUID : 75d75d6a:9947df3c:5e50eaf5:5f8d22b7
  111. # and if the LVM space won't assemble there is no /usr or /var so we are really in a mess
  112. # TODO could auto cope with degraded raid operation
  114. # the media RAID
  115. /sbin/mdadm --assemble /dev/md3 --uuid=5e9cefa1:b8bce388:d442afdb:7e9f15bf
  116. # old 52be4797:edab2349:eb21497e:52035eaa
  117. # new Array UUID : 5e9cefa1:b8bce388:d442afdb:7e9f15bf
  119. # lvm runs as whatever its called as
  120. ln -s /sbin/lvm /sbin/vgchange
  122. # start the volume groups - we only have host and vm volume groups
  123. /sbin/vgchange -ay host || rescue_shell
  125. # we don't get any KVMs if vm doesnt start but its not fatal to booting the host
  126. /sbin/vgchange -ay guests
  128. # if host failed we have no /usr or /var
  130. # get here with raid sets assembled and logical volumes available
  132. # mounting rootfs on /mnt/root
  133. uuidlabel_root || rescue_shell "Error with uuidlabel_root"
  135. # space separated list of mountpoints that ...
  136. mountpoints="/usr /var"
  138. # ... we want to find in /etc/fstab ...
  139. ln -s /mnt/root/etc/fstab /etc/fstab
  141. # ... to check filesystems and mount our devices.
  142. for m in $mountpoints ; do
  144. #echo $m
  146. check_filesystem $m
  148. echo "Mounting $m"
  149. # mount the device and ...
  150. mount $m || rescue_shell "Error while mounting $m"
  152. # ... move the tree to its final location
  153. mount --move $m "/mnt/root"$m || rescue_shell "Error while moving $m"
  154. done
  156. echo "All done. Switching to real root."
  158. # clean up. The init process will remount proc sys and dev later
  159. umount /proc
  160. umount /sys
  161. umount /dev
  163. # switch to the real root and execute init
  164. exec switch_root /mnt/root /sbin/init
  165.  
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