contrib/dracut/90zfs/parse-zfs.sh.in

   1 #!/bin/bash
   2
   3 . /lib/dracut-lib.sh
   4
   5 # Let the command line override our host id.
   6 spl_hostid=$(getarg spl_hostid=)
   7 if [ -n "${spl_hostid}" ] ; then
   8         info "ZFS: Using hostid from command line: ${spl_hostid}"
   9         AA=$(echo "${spl_hostid}" | cut -b 1,2)
  10         BB=$(echo "${spl_hostid}" | cut -b 3,4)
  11         CC=$(echo "${spl_hostid}" | cut -b 5,6)
  12         DD=$(echo "${spl_hostid}" | cut -b 7,8)
  13         echo -ne "\\x${DD}\\x${CC}\\x${BB}\\x${AA}" >/etc/hostid
  14 elif [ -f "/etc/hostid" ] ; then
  15         info "ZFS: Using hostid from /etc/hostid: $(hostid)"
  16 else
  17         warn "ZFS: No hostid found on kernel command line or /etc/hostid."
  18         warn "ZFS: Pools may not import correctly."
  19 fi
  20
  21 wait_for_zfs=0
  22 case "${root}" in
  23         ""|zfs|zfs:)
  24                 # We'll take root unset, root=zfs, or root=zfs:
  25                 # No root set, so we want to read the bootfs attribute.  We
  26                 # can't do that until udev settles so we'll set dummy values
  27                 # and hope for the best later on.
  28                 root="zfs:AUTO"
  29                 rootok=1
  30                 wait_for_zfs=1
  31
  32                 info "ZFS: Enabling autodetection of bootfs after udev settles."
  33                 ;;
  34
  35         ZFS\=*|zfs:*|zfs:FILESYSTEM\=*|FILESYSTEM\=*)
  36                 # root is explicit ZFS root.  Parse it now.  We can handle
  37                 # a root=... param in any of the following formats:
  38                 # root=ZFS=rpool/ROOT
  39                 # root=zfs:rpool/ROOT
  40                 # root=zfs:FILESYSTEM=rpool/ROOT
  41                 # root=FILESYSTEM=rpool/ROOT
  42                 # root=ZFS=pool+with+space/ROOT+WITH+SPACE (translates to root=ZFS=pool with space/ROOT WITH SPACE)
  43
  44                 # Strip down to just the pool/fs
  45                 root="${root#zfs:}"
  46                 root="${root#FILESYSTEM=}"
  47                 root="zfs:${root#ZFS=}"
  48                 # switch + with spaces because kernel cmdline does not allow us to quote parameters
  49                 root=$(printf '%s\n' "$root" | sed "s/+/ /g")
  50                 rootok=1
  51                 wait_for_zfs=1
  52
  53                 info "ZFS: Set ${root} as bootfs."
  54                 ;;
  55 esac
  56
  57 # Make sure Dracut is happy that we have a root and will wait for ZFS
  58 # modules to settle before mounting.
  59 if [ ${wait_for_zfs} -eq 1 ]; then
  60         ln -s /dev/null /dev/root 2>/dev/null
  61         initqueuedir="${hookdir}/initqueue/finished"
  62         test -d "${initqueuedir}" || {
  63                 initqueuedir="${hookdir}/initqueue-finished"
  64         }
  65         echo '[ -e /dev/zfs ]' > "${initqueuedir}/zfs.sh"
  66 fi