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

   1 #!/bin/sh
   2 # shellcheck disable=SC2034,SC2154
   3
   4 . /lib/dracut-zfs-lib.sh
   5
   6 ZFS_DATASET=""
   7 ZFS_POOL=""
   8
   9 case "${root}" in
  10         zfs:*) ;;
  11         *) return ;;
  12 esac
  13
  14 GENERATOR_FILE=/run/systemd/generator/sysroot.mount
  15 GENERATOR_EXTENSION=/run/systemd/generator/sysroot.mount.d/zfs-enhancement.conf
  16
  17 if [ -e "$GENERATOR_FILE" ] && [ -e "$GENERATOR_EXTENSION" ] ; then
  18         # If the ZFS sysroot.mount flag exists, the initial RAM disk configured
  19         # it to mount ZFS on root.  In that case, we bail early.  This flag
  20         # file gets created by the zfs-generator program upon successful run.
  21         info "ZFS: There is a sysroot.mount and zfs-generator has extended it."
  22         info "ZFS: Delegating root mount to sysroot.mount."
  23         # Let us tell the initrd to run on shutdown.
  24         # We have a shutdown hook to run
  25         # because we imported the pool.
  26         # We now prevent Dracut from running this thing again.
  27         for zfsmounthook in "$hookdir"/mount/*zfs* ; do
  28                 if [ -f "$zfsmounthook" ] ; then
  29                         rm -f "$zfsmounthook"
  30                 fi
  31         done
  32         return
  33 fi
  34 info "ZFS: No sysroot.mount exists or zfs-generator did not extend it."
  35 info "ZFS: Mounting root with the traditional mount-zfs.sh instead."
  36
  37 # Delay until all required block devices are present.
  38 modprobe zfs 2>/dev/null
  39 udevadm settle
  40
  41 if [ "${root}" = "zfs:AUTO" ] ; then
  42         if ! ZFS_DATASET="$(find_bootfs)" ; then
  43                 # shellcheck disable=SC2086
  44                 zpool import -N -a ${ZPOOL_IMPORT_OPTS}
  45                 if ! ZFS_DATASET="$(find_bootfs)" ; then
  46                         warn "ZFS: No bootfs attribute found in importable pools."
  47                         export_all -F
  48
  49                         rootok=0
  50                         return 1
  51                 fi
  52         fi
  53         info "ZFS: Using ${ZFS_DATASET} as root."
  54 fi
  55
  56 ZFS_DATASET="${ZFS_DATASET:-${root#zfs:}}"
  57 ZFS_POOL="${ZFS_DATASET%%/*}"
  58
  59 if import_pool "${ZFS_POOL}" ; then
  60         # Load keys if we can or if we need to
  61         if [ "$(zpool list -H -o feature@encryption "${ZFS_POOL}")" = 'active' ]; then
  62                 # if the root dataset has encryption enabled
  63                 ENCRYPTIONROOT="$(zfs get -H -o value encryptionroot "${ZFS_DATASET}")"
  64                 if ! [ "${ENCRYPTIONROOT}" = "-" ]; then
  65                         KEYSTATUS="$(zfs get -H -o value keystatus "${ENCRYPTIONROOT}")"
  66                         # if the key needs to be loaded
  67                         if [ "$KEYSTATUS" = "unavailable" ]; then
  68                                 # decrypt them
  69                                 ask_for_password \
  70                                         --tries 5 \
  71                                         --prompt "Encrypted ZFS password for ${ENCRYPTIONROOT}: " \
  72                                         --cmd "zfs load-key '${ENCRYPTIONROOT}'"
  73                         fi
  74                 fi
  75         fi
  76         # Let us tell the initrd to run on shutdown.
  77         # We have a shutdown hook to run
  78         # because we imported the pool.
  79         info "ZFS: Mounting dataset ${ZFS_DATASET}..."
  80         if mount_dataset "${ZFS_DATASET}" ; then
  81                 ROOTFS_MOUNTED=yes
  82                 return 0
  83         fi
  84 fi
  85
  86 rootok=0