zfs-debian-pve/tree/zfs-initramfs/usr/share/initramfs-tools/hooks/zfs

   1 #!/bin/sh
   2 #
   3 # Add ZoL filesystem capabilities to an initrd, usually for a native OpenZFS root.
   4 #
   5
   6 # This hook installs udev rules for ZoL.
   7 PREREQ="zdev"
   8
   9 # These prerequisites are provided by the zfsutils package. The zdb utility is
  10 # not strictly required, but it can be useful at the initramfs recovery prompt.
  11 COPY_EXEC_LIST="/sbin/zdb /sbin/zpool /sbin/zfs /sbin/mount.zfs"
  12
  13 # These prerequisites are provided by the base system.
  14 COPY_EXEC_LIST="$COPY_EXEC_LIST /bin/hostname /sbin/blkid"
  15
  16 # Explicitly specify all kernel modules because automatic dependency resolution
  17 # is unreliable on many systems.
  18 MANUAL_ADD_MODULES_LIST="zlib_deflate spl zavl zcommon znvpair zunicode zfs"
  19
  20 # Generic result code.
  21 RC=0
  22
  23 case $1 in
  24 prereqs)
  25         echo "$PREREQ"
  26         exit 0
  27         ;;
  28 esac
  29
  30 for ii in $COPY_EXEC_LIST
  31 do
  32         if [ ! -x "$ii" ]
  33         then
  34                 echo "Error: $ii is not executable."
  35                 RC=2
  36         fi
  37 done
  38
  39 if [ "$RC" -ne 0 ]
  40 then
  41         exit "$RC"
  42 fi
  43
  44 . /usr/share/initramfs-tools/hook-functions
  45
  46 mkdir -p "$DESTDIR/etc/"
  47
  48 # zpool requires /etc/mtab
  49 ln -sf "/proc/mounts" "$DESTDIR/etc/mtab"
  50
  51 # ZDB uses pthreads for some functions, but the library dependency is not
  52 # automatically detected. The `find` utility and extended `cp` options are
  53 # used here because libgcc_s.so could be in a subdirectory of /lib for
  54 # multi-arch installations.
  55 cp --target-directory="$DESTDIR" --parents $(find /lib -type f -name libgcc_s.so.1)
  56
  57 for ii in $COPY_EXEC_LIST
  58 do
  59         copy_exec "$ii"
  60 done
  61
  62 for ii in $MANUAL_ADD_MODULES_LIST
  63 do
  64         manual_add_modules "$ii"
  65 done
  66
  67 if [ -f "/etc/hostname" ]
  68 then
  69         cp -p "/etc/hostname" "$DESTDIR/etc/"
  70 else
  71         hostname >"$DESTDIR/etc/hostname"
  72 fi
  73
  74 # ZoL 0.6.3 deprecated the hostid check.
  75 if [ -f /etc/hostid ]
  76 then
  77         cp -p /etc/hostid "$DESTDIR/etc/hostid"
  78 fi