contrib/initramfs/hooks/zfs.in

   1 #!/bin/sh
   2 #
   3 # Add ZoL filesystem capabilities to an initrd, usually for a native ZFS 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="@sbindir@/zdb @sbindir@/zpool @sbindir@/zfs"
  12 COPY_EXEC_LIST="$COPY_EXEC_LIST @mounthelperdir@/mount.zfs @udevdir@/vdev_id"
  13 COPY_FILE_LIST="/etc/hostid @sysconfdir@/zfs/zpool.cache"
  14 COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/default/zfs"
  15 COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/zfs-functions"
  16 COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/vdev_id.conf"
  17 COPY_FILE_LIST="$COPY_FILE_LIST @udevruledir@/69-vdev.rules"
  18
  19 # These prerequisites are provided by the base system.
  20 COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/dirname /bin/hostname /sbin/blkid"
  21 COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/env"
  22
  23 # Explicitly specify all kernel modules because automatic dependency resolution
  24 # is unreliable on many systems.
  25 BASE_MODULES="zlib_deflate spl zavl zcommon znvpair zunicode zlua zfs icp"
  26 CRPT_MODULES="sun-ccm sun-gcm sun-ctr"
  27 MANUAL_ADD_MODULES_LIST="$BASE_MODULES"
  28
  29 # Generic result code.
  30 RC=0
  31
  32 case $1 in
  33 prereqs)
  34         echo "$PREREQ"
  35         exit 0
  36         ;;
  37 esac
  38
  39 for ii in $COPY_EXEC_LIST
  40 do
  41         if [ ! -x "$ii" ]
  42         then
  43                 echo "Error: $ii is not executable."
  44                 RC=2
  45         fi
  46 done
  47
  48 if [ "$RC" -ne 0 ]
  49 then
  50         exit "$RC"
  51 fi
  52
  53 . /usr/share/initramfs-tools/hook-functions
  54
  55 mkdir -p "$DESTDIR/etc/"
  56
  57 # ZDB uses pthreads for some functions, but the library dependency is not
  58 # automatically detected. The `find` utility and extended `cp` options are
  59 # used here because libgcc_s.so could be in a subdirectory of /lib for
  60 # multi-arch installations.
  61 cp --target-directory="$DESTDIR" --parents $(find /lib/ -type f -name libgcc_s.so.1)
  62
  63 for ii in $COPY_EXEC_LIST
  64 do
  65         copy_exec "$ii"
  66 done
  67
  68 for ii in $COPY_FILE_LIST
  69 do
  70         dir=$(dirname "$ii")
  71         [ -d "$dir" ] && mkdir -p "$DESTDIR/$dir"
  72         [ -f "$ii" ] && cp -p "$ii" "$DESTDIR/$ii"
  73 done
  74
  75 for ii in $MANUAL_ADD_MODULES_LIST
  76 do
  77         manual_add_modules "$ii"
  78 done
  79
  80 if [ -f "/etc/hostname" ]
  81 then
  82         cp -p "/etc/hostname" "$DESTDIR/etc/"
  83 else
  84         hostname >"$DESTDIR/etc/hostname"
  85 fi
  86
  87 for ii in zfs zfs.conf spl spl.conf
  88 do
  89         if [ -f "/etc/modprobe.d/$ii" ]; then
  90                 if [ ! -d "$DESTDIR/etc/modprobe.d" ]; then
  91                         mkdir -p $DESTDIR/etc/modprobe.d
  92                 fi
  93                 cp -p "/etc/modprobe.d/$ii" $DESTDIR/etc/modprobe.d/
  94         fi
  95 done
  96
  97 # With pull request #1476 (not yet merged) comes a verbose warning
  98 # if /usr/bin/net doesn't exist or isn't executable. Just create
  99 # a dummy...
 100 [ ! -d "$DESTDIR/usr/bin" ] && mkdir -p "$DESTDIR/usr/bin"
 101 if [ ! -x "$DESTDIR/usr/bin/net" ]; then
 102     touch "$DESTDIR/usr/bin/net"
 103     chmod +x "$DESTDIR/usr/bin/net"
 104 fi
 105
 106 exit 0