etc/init.d/zfs-import.in

   1 #!@DEFAULT_INIT_SHELL@
   2 # shellcheck disable=SC2154
   3 #
   4 # zfs-import    This script will import ZFS pools
   5 #
   6 # chkconfig:    2345 01 99
   7 # description:  This script will perform a verbatim import of ZFS pools
   8 #               during system boot.
   9 # probe: true
  10 #
  11 ### BEGIN INIT INFO
  12 # Provides:          zfs-import
  13 # Required-Start:    mtab
  14 # Required-Stop:     $local_fs mtab
  15 # Default-Start:     S
  16 # Default-Stop:      0 1 6
  17 # X-Start-Before:    checkfs
  18 # X-Stop-After:      zfs-mount
  19 # Short-Description: Import ZFS pools
  20 # Description: Run the `zpool import` command.
  21 ### END INIT INFO
  22 #
  23 # NOTE: Not having '$local_fs' on Required-Start but only on Required-Stop
  24 #       is on purpose. If we have '$local_fs' in both (and X-Start-Before=checkfs)
  25 #       we get conflicts - import needs to be started extremely early,
  26 #       but not stopped too late.
  27 #
  28 # Released under the 2-clause BSD license.
  29 #
  30 # This script is based on debian/zfsutils.zfs.init from the
  31 # Debian GNU/kFreeBSD zfsutils 8.1-3 package, written by Aurelien Jarno.
  32
  33 # Source the common init script
  34 . @sysconfdir@/zfs/zfs-functions
  35
  36 # ----------------------------------------------------
  37
  38 do_depend()
  39 {
  40         before swap
  41         after sysfs udev
  42         keyword -lxc -openvz -prefix -vserver
  43 }
  44
  45 # Use the zpool cache file to import pools
  46 do_verbatim_import()
  47 {
  48         if [ -f "$ZPOOL_CACHE" ]
  49         then
  50                 zfs_action "Importing ZFS pool(s)" \
  51                         "$ZPOOL" import -c "$ZPOOL_CACHE" -N -a
  52         fi
  53 }
  54
  55 # Support function to get a list of all pools, separated with ';'
  56 find_pools()
  57 {
  58         local pools
  59
  60         pools=$("$@" 2> /dev/null | \
  61                 sed -Ee '/pool:|^[a-zA-Z0-9]/!d' -e 's@.*: @@' | \
  62                 sort | \
  63                 tr '\n' ';')
  64
  65         echo "${pools%%;}" # Return without the last ';'.
  66 }
  67
  68 # Find and import all visible pools, even exported ones
  69 do_import_all_visible()
  70 {
  71         local already_imported available_pools pool npools
  72         local exception dir ZPOOL_IMPORT_PATH RET=0 r=1
  73
  74         # In case not shutdown cleanly.
  75         # shellcheck disable=SC2154
  76         [ -n "$init" ] && rm -f /etc/dfs/sharetab
  77
  78         # Just simplify code later on.
  79         if [ -n "$USE_DISK_BY_ID" ] && [ "$USE_DISK_BY_ID" != 'yes' ]
  80         then
  81                 # It's something, but not 'yes' so it's no good to us.
  82                 unset USE_DISK_BY_ID
  83         fi
  84
  85         # Find list of already imported pools.
  86         already_imported=$(find_pools "$ZPOOL" list -H -oname)
  87         available_pools=$(find_pools "$ZPOOL" import)
  88
  89         # Just in case - seen it happen (that a pool isn't visible/found
  90         # with a simple "zpool import" but only when using the "-d"
  91         # option or setting ZPOOL_IMPORT_PATH).
  92         if [ -d "/dev/disk/by-id" ]
  93         then
  94                 npools=$(find_pools "$ZPOOL" import -d /dev/disk/by-id)
  95                 if [ -n "$npools" ]
  96                 then
  97                         # Because we have found extra pool(s) here, which wasn't
  98                         # found 'normally', we need to force USE_DISK_BY_ID to
  99                         # make sure we're able to actually import it/them later.
 100                         USE_DISK_BY_ID='yes'
 101
 102                         if [ -n "$available_pools" ]
 103                         then
 104                                 # Filter out duplicates (pools found with the simpl
 105                                 # "zpool import" but which is also found with the
 106                                 # "zpool import -d ...").
 107                                 npools=$(echo "$npools" | sed "s,$available_pools,,")
 108
 109                                 # Add the list to the existing list of
 110                                 # available pools
 111                                 available_pools="$available_pools;$npools"
 112                         else
 113                                 available_pools="$npools"
 114                         fi
 115                 fi
 116         fi
 117
 118         # Filter out any exceptions...
 119         if [ -n "$ZFS_POOL_EXCEPTIONS" ]
 120         then
 121                 local found=""
 122                 local apools=""
 123                 OLD_IFS="$IFS" ; IFS=";"
 124
 125                 for pool in $available_pools
 126                 do
 127                         for exception in $ZFS_POOL_EXCEPTIONS
 128                         do
 129                                 [ "$pool" = "$exception" ] && continue 2
 130                                 found="$pool"
 131                         done
 132
 133                         if [ -n "$found" ]
 134                         then
 135                                 if [ -n "$apools" ]
 136                                 then
 137                                         apools="$apools;$pool"
 138                                 else
 139                                         apools="$pool"
 140                                 fi
 141                         fi
 142                 done
 143
 144                 IFS="$OLD_IFS"
 145                 available_pools="$apools"
 146         fi
 147
 148         # For backwards compatibility, make sure that ZPOOL_IMPORT_PATH is set
 149         # to something we can use later with the real import(s). We want to
 150         # make sure we find all by* dirs, BUT by-vdev should be first (if it
 151         # exists).
 152         if [ -n "$USE_DISK_BY_ID" ] && [ -z "$ZPOOL_IMPORT_PATH" ]
 153         then
 154                 local dirs
 155                 dirs="$(for dir in $(echo /dev/disk/by-*)
 156                 do
 157                         # Ignore by-vdev here - we want it first!
 158                         echo "$dir" | grep -q /by-vdev && continue
 159                         [ ! -d "$dir" ] && continue
 160
 161                         printf "%s" "$dir:"
 162                 done | sed 's,:$,,g')"
 163
 164                 if [ -d "/dev/disk/by-vdev" ]
 165                 then
 166                         # Add by-vdev at the beginning.
 167                         ZPOOL_IMPORT_PATH="/dev/disk/by-vdev:"
 168                 fi
 169
 170                 # Help with getting LUKS partitions etc imported.
 171                 if [ -d "/dev/mapper" ]; then
 172                         if [ -n "$ZPOOL_IMPORT_PATH" ]; then
 173                                 ZPOOL_IMPORT_PATH="$ZPOOL_IMPORT_PATH:/dev/mapper:"
 174                         else
 175                                 ZPOOL_IMPORT_PATH="/dev/mapper:"
 176                         fi
 177                 fi
 178
 179                 # ... and /dev at the very end, just for good measure.
 180                 ZPOOL_IMPORT_PATH="$ZPOOL_IMPORT_PATH$dirs:/dev"
 181         fi
 182
 183         # Needs to be exported for "zpool" to catch it.
 184         [ -n "$ZPOOL_IMPORT_PATH" ] && export ZPOOL_IMPORT_PATH
 185
 186         # Mount all available pools (except those set in ZFS_POOL_EXCEPTIONS.
 187         #
 188         # If not interactive (run from init - variable init='/sbin/init')
 189         # we get ONE line for all pools being imported, with just a dot
 190         # as status for each pool.
 191         # Example: Importing ZFS pool(s)...                             [OK]
 192         #
 193         # If it IS interactive (started from the shell manually), then we
 194         # get one line per pool importing.
 195         # Example: Importing ZFS pool pool1                             [OK]
 196         #          Importing ZFS pool pool2                             [OK]
 197         #          [etc]
 198         [ -n "$init" ] && zfs_log_begin_msg "Importing ZFS pool(s)"
 199         OLD_IFS="$IFS" ; IFS=";"
 200         for pool in $available_pools
 201         do
 202                 [ -z "$pool" ] && continue
 203
 204                 # We have pools that haven't been imported - import them
 205                 if [ -n "$init" ]
 206                 then
 207                         # Not interactive - a dot for each pool.
 208                         # Except on Gentoo where this doesn't work.
 209                         zfs_log_progress_msg "."
 210                 else
 211                         # Interactive - one 'Importing ...' line per pool
 212                         zfs_log_begin_msg "Importing ZFS pool $pool"
 213                 fi
 214
 215                 # Import by using ZPOOL_IMPORT_PATH (either set above or in
 216                 # the config file) _or_ with the 'built in' default search
 217                 # paths. This is the preferred way.
 218                 # shellcheck disable=SC2086
 219                 "$ZPOOL" import -N ${ZPOOL_IMPORT_OPTS} "$pool" 2> /dev/null
 220                 r="$?" ; RET=$((RET + r))
 221                 if [ "$r" -eq 0 ]
 222                 then
 223                         # Output success and process the next pool
 224                         [ -z "$init" ] && zfs_log_end_msg 0
 225                         continue
 226                 fi
 227                 # We don't want a fail msg here, we're going to try import
 228                 # using the cache file soon and that might succeed.
 229                 [ ! -f "$ZPOOL_CACHE" ] && zfs_log_end_msg "$RET"
 230
 231                 if [ "$r" -gt 0 ] && [ -f "$ZPOOL_CACHE" ]
 232                 then
 233                         # Failed to import without a cache file. Try WITH...
 234                         if [ -z "$init" ] && check_boolean "$VERBOSE_MOUNT"
 235                         then
 236                                 # Interactive + Verbose = more information
 237                                 zfs_log_progress_msg " using cache file"
 238                         fi
 239
 240                         # shellcheck disable=SC2086
 241                         "$ZPOOL" import -c "$ZPOOL_CACHE" -N ${ZPOOL_IMPORT_OPTS} \
 242                                 "$pool" 2> /dev/null
 243                         r="$?" ; RET=$((RET + r))
 244                         if [ "$r" -eq 0 ]
 245                         then
 246                                 [ -z "$init" ] && zfs_log_end_msg 0
 247                                 continue 3 # Next pool
 248                         fi
 249                         zfs_log_end_msg "$RET"
 250                 fi
 251         done
 252         [ -n "$init" ] && zfs_log_end_msg "$RET"
 253
 254         IFS="$OLD_IFS"
 255         [ -n "$already_imported" ] && [ -z "$available_pools" ] && return 0
 256
 257         return "$RET"
 258 }
 259
 260 do_import()
 261 {
 262         if check_boolean "$ZPOOL_IMPORT_ALL_VISIBLE"
 263         then
 264                 do_import_all_visible
 265         else
 266                 # This is the default option
 267                 do_verbatim_import
 268         fi
 269 }
 270
 271 # Output the status and list of pools
 272 do_status()
 273 {
 274         check_module_loaded "zfs" || exit 0
 275
 276         "$ZPOOL" status && echo "" && "$ZPOOL" list
 277 }
 278
 279 do_start()
 280 {
 281         if check_boolean "$VERBOSE_MOUNT"
 282         then
 283             zfs_log_begin_msg "Checking if ZFS userspace tools present"
 284         fi
 285
 286         if checksystem
 287         then
 288                 check_boolean "$VERBOSE_MOUNT" && zfs_log_end_msg 0
 289
 290                 check_boolean "$VERBOSE_MOUNT" && \
 291                         zfs_log_begin_msg "Loading kernel ZFS infrastructure"
 292
 293                 if ! load_module "zfs"
 294                 then
 295                         check_boolean "$VERBOSE_MOUNT" && zfs_log_end_msg 1
 296                         return 5
 297                 fi
 298                 check_boolean "$VERBOSE_MOUNT" && zfs_log_end_msg 0
 299
 300                 do_import && udev_trigger # just to make sure we get zvols.
 301
 302                 return 0
 303         else
 304                 return 1
 305         fi
 306 }
 307
 308 # ----------------------------------------------------
 309
 310 if [ ! -e /sbin/openrc-run ]
 311 then
 312         case "$1" in
 313                 start)
 314                         do_start
 315                         ;;
 316                 stop)
 317                         # no-op
 318                         ;;
 319                 status)
 320                         do_status
 321                         ;;
 322                 force-reload|condrestart|reload|restart)
 323                         # no-op
 324                         ;;
 325                 *)
 326                         [ -n "$1" ] && echo "Error: Unknown command $1."
 327                         echo "Usage: $0 {start|status}"
 328                         exit 3
 329                         ;;
 330         esac
 331
 332         exit $?
 333 else
 334         # Create wrapper functions since Gentoo don't use the case part.
 335         depend() { do_depend; }
 336         start() { do_start; }
 337         status() { do_status; }
 338 fi