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="udev"
   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="$COPY_EXEC_LIST @mounthelperdir@/mount.zfs @udevdir@/vdev_id"
  13 COPY_EXEC_LIST="$COPY_EXEC_LIST @udevdir@/zvol_id"
  14 COPY_FILE_LIST="/etc/hostid @sysconfdir@/zfs/zpool.cache"
  15 COPY_FILE_LIST="$COPY_FILE_LIST @DEFAULT_INITCONF_DIR@/zfs"
  16 COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/zfs-functions"
  17 COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/vdev_id.conf"
  18 COPY_FILE_LIST="$COPY_FILE_LIST @udevruledir@/60-zvol.rules"
  19 COPY_FILE_LIST="$COPY_FILE_LIST @udevruledir@/69-vdev.rules"
  20
  21 # These prerequisites are provided by the base system.
  22 COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/dirname /bin/hostname /sbin/blkid"
  23 COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/env"
  24
  25 # Explicitly specify all kernel modules because automatic dependency resolution
  26 # is unreliable on many systems.
  27 BASE_MODULES="zlib_deflate spl zavl zcommon znvpair zunicode zlua zfs icp"
  28 CRPT_MODULES="sun-ccm sun-gcm sun-ctr"
  29 MANUAL_ADD_MODULES_LIST="$BASE_MODULES"
  30
  31 # Generic result code.
  32 RC=0
  33
  34 case $1 in
  35 prereqs)
  36         echo "$PREREQ"
  37         exit 0
  38         ;;
  39 esac
  40
  41 for ii in $COPY_EXEC_LIST
  42 do
  43         if [ ! -x "$ii" ]
  44         then
  45                 echo "Error: $ii is not executable."
  46                 RC=2
  47         fi
  48 done
  49
  50 if [ "$RC" -ne 0 ]
  51 then
  52         exit "$RC"
  53 fi
  54
  55 . /usr/share/initramfs-tools/hook-functions
  56
  57 mkdir -p "$DESTDIR/etc/"
  58
  59 # ZDB uses pthreads for some functions, but the library dependency is not
  60 # automatically detected. The `find` utility and extended `cp` options are
  61 # used here because libgcc_s.so could be in a subdirectory of /lib for
  62 # multi-arch installations.
  63 cp --target-directory="$DESTDIR" --parents $(find /lib/ -type f -name libgcc_s.so.1)
  64
  65 for ii in $COPY_EXEC_LIST
  66 do
  67         copy_exec "$ii"
  68 done
  69
  70 for ii in $COPY_FILE_LIST
  71 do
  72         dir=$(dirname "$ii")
  73         [ -d "$dir" ] && mkdir -p "$DESTDIR/$dir"
  74         [ -f "$ii" ] && cp -p "$ii" "$DESTDIR/$ii"
  75 done
  76
  77 for ii in $MANUAL_ADD_MODULES_LIST
  78 do
  79         manual_add_modules "$ii"
  80 done
  81
  82 if [ -f "/etc/hostname" ]
  83 then
  84         cp -p "/etc/hostname" "$DESTDIR/etc/"
  85 else
  86         hostname >"$DESTDIR/etc/hostname"
  87 fi
  88
  89 for ii in zfs zfs.conf spl spl.conf
  90 do
  91         if [ -f "/etc/modprobe.d/$ii" ]; then
  92                 if [ ! -d "$DESTDIR/etc/modprobe.d" ]; then
  93                         mkdir -p $DESTDIR/etc/modprobe.d
  94                 fi
  95                 cp -p "/etc/modprobe.d/$ii" $DESTDIR/etc/modprobe.d/
  96         fi
  97 done
  98
  99 # With pull request #1476 (not yet merged) comes a verbose warning
 100 # if /usr/bin/net doesn't exist or isn't executable. Just create
 101 # a dummy...
 102 [ ! -d "$DESTDIR/usr/bin" ] && mkdir -p "$DESTDIR/usr/bin"
 103 if [ ! -x "$DESTDIR/usr/bin/net" ]; then
 104     touch "$DESTDIR/usr/bin/net"
 105     chmod +x "$DESTDIR/usr/bin/net"
 106 fi
 107
 108 exit 0