utilities/ovs-ctl.in

   1 #! /bin/sh
   2 # Copyright (C) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at:
   7 #
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 case $0 in
  17     */*) dir0=`echo "$0" | sed 's,/[^/]*$,,'` ;;
  18     *) dir0=./ ;;
  19 esac
  20 . "$dir0/ovs-lib" || exit 1
  21
  22 for dir in "$sbindir" "$bindir" /sbin /bin /usr/sbin /usr/bin; do
  23     case :$PATH: in
  24         *:$dir:*) ;;
  25         *) PATH=$PATH:$dir ;;
  26     esac
  27 done
  28
  29 ## ----- ##
  30 ## start ##
  31 ## ----- ##
  32
  33 insert_mod_if_required () {
  34     # If openvswitch is already loaded then we're done.
  35     test -e /sys/module/openvswitch -o -e /sys/module/openvswitch_mod && \
  36      return 0
  37
  38     # Load openvswitch.  If that's successful then we're done.
  39     action "Inserting openvswitch module" modprobe openvswitch && return 0
  40
  41     # If the bridge module is loaded, then that might be blocking
  42     # openvswitch.  Try to unload it, if there are no bridges.
  43     test -e /sys/module/bridge || return 1
  44     bridges=`echo /sys/class/net/*/bridge | sed 's,/sys/class/net/,,g;s,/bridge,,g'`
  45     if test "$bridges" != "*"; then
  46         log_warning_msg "not removing bridge module because bridges exist ($bridges)"
  47         return 1
  48     fi
  49     action "removing bridge module" rmmod bridge || return 1
  50
  51     # Try loading openvswitch again.
  52     action "Inserting openvswitch module" modprobe openvswitch
  53 }
  54
  55 ovs_vsctl () {
  56     ovs-vsctl --no-wait "$@"
  57 }
  58
  59 ovsdb_tool () {
  60     ovsdb-tool -vconsole:off "$@"
  61 }
  62
  63 create_db () {
  64     action "Creating empty database $DB_FILE" ovsdb_tool create "$DB_FILE" "$DB_SCHEMA"
  65 }
  66
  67 upgrade_db () {
  68     schemaver=`ovsdb_tool schema-version "$DB_SCHEMA"`
  69     if test ! -e "$DB_FILE"; then
  70         log_warning_msg "$DB_FILE does not exist"
  71         install -d -m 755 -o root -g root `dirname $DB_FILE`
  72         create_db
  73     elif test X"`ovsdb_tool needs-conversion "$DB_FILE" "$DB_SCHEMA"`" != Xno; then
  74         # Back up the old version.
  75         version=`ovsdb_tool db-version "$DB_FILE"`
  76         cksum=`ovsdb_tool db-cksum "$DB_FILE" | awk '{print $1}'`
  77         backup=$DB_FILE.backup$version-$cksum
  78         action "Backing up database to $backup" cp "$DB_FILE" "$backup" || return 1
  79
  80         # Compact database.  This is important if the old schema did not enable
  81         # garbage collection (i.e. if it did not have any tables with "isRoot":
  82         # true) but the new schema does.  In that situation the old database
  83         # may contain a transaction that creates a record followed by a
  84         # transaction that creates the first use of the record.  Replaying that
  85         # series of transactions against the new database schema (as "convert"
  86         # does) would cause the record to be dropped by the first transaction,
  87         # then the second transaction would cause a referential integrity
  88         # failure (for a strong reference).
  89         #
  90         # Errors might occur on an Open vSwitch downgrade if ovsdb-tool doesn't
  91         # understand some feature of the schema used in the OVSDB version that
  92         # we're downgrading from, so we don't give up on error.
  93         action "Compacting database" ovsdb_tool compact "$DB_FILE"
  94
  95         # Upgrade or downgrade schema.
  96         if action "Converting database schema" ovsdb_tool convert "$DB_FILE" "$DB_SCHEMA"; then
  97             :
  98         else
  99             log_warning_msg "Schema conversion failed, using empty database instead"
 100             rm -f "$DB_FILE"
 101             create_db
 102         fi
 103     fi
 104 }
 105
 106 set_system_ids () {
 107     set ovs_vsctl set Open_vSwitch .
 108
 109     OVS_VERSION=`ovs-vswitchd --version | sed 's/.*) //;1q'`
 110     set "$@" ovs-version="$OVS_VERSION"
 111
 112     case $SYSTEM_ID in
 113         random)
 114             id_file=$etcdir/system-id.conf
 115             uuid_file=$etcdir/install_uuid.conf
 116             if test -e "$id_file"; then
 117                 SYSTEM_ID=`cat "$id_file"`
 118             elif test -e "$uuid_file"; then
 119                 # Migrate from old file name.
 120                 . "$uuid_file"
 121                 SYSTEM_ID=$INSTALLATION_UUID
 122                 echo "$SYSTEM_ID" > "$id_file"
 123             elif SYSTEM_ID=`uuidgen`; then
 124                 echo "$SYSTEM_ID" > "$id_file"
 125             else
 126                 log_failure_msg "missing uuidgen, could not generate system ID"
 127             fi
 128             ;;
 129
 130         '')
 131             log_failure_msg "system ID not configured, please use --system-id"
 132             ;;
 133
 134         *)
 135             ;;
 136     esac
 137     set "$@" external-ids:system-id="\"$SYSTEM_ID\""
 138
 139     if test X"$SYSTEM_TYPE" != X; then
 140         set "$@" system-type="\"$SYSTEM_TYPE\""
 141     else
 142         log_failure_msg "no default system type, please use --system-type"
 143     fi
 144
 145     if test X"$SYSTEM_VERSION" != X; then
 146         set "$@" system-version="\"$SYSTEM_VERSION\""
 147     else
 148         log_failure_msg "no default system version, please use --system-version"
 149     fi
 150
 151     action "Configuring Open vSwitch system IDs" "$@" $extra_ids
 152 }
 153
 154 check_force_cores () {
 155     if test X"$FORCE_COREFILES" = Xyes; then
 156         ulimit -c 67108864
 157     fi
 158 }
 159
 160 start_ovsdb () {
 161     check_force_cores
 162
 163     if daemon_is_running ovsdb-server; then
 164         log_success_msg "ovsdb-server is already running"
 165     else
 166         # Create initial database or upgrade database schema.
 167         upgrade_db || return 1
 168
 169         # Start ovsdb-server.
 170         set ovsdb-server "$DB_FILE"
 171         for db in $EXTRA_DBS; do
 172             case $db in
 173                 /*) ;;
 174                 *) db=$dbdir/$db ;;
 175             esac
 176
 177             if test ! -f "$db"; then
 178                 log_warning_msg "$db (from \$EXTRA_DBS) does not exist."
 179             elif ovsdb-tool db-version "$db" >/dev/null; then
 180                 set "$@" "$db"
 181             else
 182                 log_warning_msg "$db (from \$EXTRA_DBS) cannot be read as a database (see error message above)"
 183             fi
 184         done
 185         set "$@" -vconsole:emer -vsyslog:err -vfile:info
 186         set "$@" --remote=punix:"$DB_SOCK"
 187         set "$@" --private-key=db:Open_vSwitch,SSL,private_key
 188         set "$@" --certificate=db:Open_vSwitch,SSL,certificate
 189         set "$@" --bootstrap-ca-cert=db:Open_vSwitch,SSL,ca_cert
 190         start_daemon "$OVSDB_SERVER_PRIORITY" "$OVSDB_SERVER_WRAPPER" "$@" \
 191             || return 1
 192
 193         # Initialize database settings.
 194         ovs_vsctl -- init -- set Open_vSwitch . db-version="$schemaver" \
 195             || return 1
 196         set_system_ids || return 1
 197         if test X"$DELETE_BRIDGES" = Xyes; then
 198             for bridge in `ovs_vsctl list-br`; do
 199         ovs_vsctl del-br $bridge
 200             done
 201         fi
 202     fi
 203 }
 204
 205 add_managers () {
 206     # Now that ovs-vswitchd has started and completed its initial
 207     # configuration, tell ovsdb-server to conenct to the remote managers.  We
 208     # used to do this at ovsdb-server startup time, but waiting for
 209     # ovs-vswitchd to finish configuring means that remote managers see less
 210     # churn in the database at startup or restart.  (For example, managers
 211     # won't briefly see empty datapath-id or ofport columns for records that
 212     # exist at startup.)
 213     action "Enabling remote OVSDB managers" \
 214         ovs-appctl -t ovsdb-server ovsdb-server/add-remote \
 215             db:Open_vSwitch,Open_vSwitch,manager_options
 216 }
 217
 218 start_forwarding () {
 219     check_force_cores
 220
 221     insert_mod_if_required || return 1
 222
 223     if daemon_is_running ovs-vswitchd; then
 224         log_success_msg "ovs-vswitchd is already running"
 225     else
 226         # Increase the limit on the number of open file descriptors.
 227         # On Linux, ovs-vswitchd needs about one file descriptor per
 228         # switch port, so this allows a very large number of switch
 229         # ports.
 230         ulimit -n 5000
 231
 232             # Start ovs-vswitchd.
 233             set ovs-vswitchd unix:"$DB_SOCK"
 234             set "$@" -vconsole:emer -vsyslog:err -vfile:info
 235             if test X"$MLOCKALL" != Xno; then
 236                 set "$@" --mlockall
 237             fi
 238             start_daemon "$OVS_VSWITCHD_PRIORITY" "$OVS_VSWITCHD_WRAPPER" "$@"
 239     fi
 240 }
 241
 242 ## ---- ##
 243 ## stop ##
 244 ## ---- ##
 245
 246 stop_ovsdb () {
 247     stop_daemon ovsdb-server
 248 }
 249
 250 stop_forwarding () {
 251     stop_daemon ovs-vswitchd
 252 }
 253
 254 ## ----------------- ##
 255 ## force-reload-kmod ##
 256 ## ----------------- ##
 257
 258 internal_interfaces () {
 259     # Outputs a list of internal interfaces:
 260     #
 261     #   - There is an internal interface for every bridge, whether it
 262     #     has an Interface record or not and whether the Interface
 263     #     record's 'type' is properly set or not.
 264     #
 265     #   - There is an internal interface for each Interface record whose
 266     #     'type' is 'internal'.
 267     #
 268     # But ignore interfaces that don't really exist.
 269     for d in `(ovs_vsctl --bare \
 270                 -- --columns=name find Interface type=internal \
 271                     -- list-br) | sort -u`
 272     do
 273         if test -e "/sys/class/net/$d"; then
 274                 printf "%s " "$d"
 275             fi
 276     done
 277 }
 278
 279 ovs_save () {
 280     bridges=`ovs_vsctl -- --real list-br`
 281     if [ -n "${bridges}" ] && \
 282         "$datadir/scripts/ovs-save" "$1" ${bridges} > "$2"; then
 283         chmod +x "$2"
 284         return 0
 285     fi
 286     [ -z "${bridges}" ] && return 0
 287 }
 288
 289 save_ofports_if_required () {
 290     # Save ofports if we are upgrading from a pre-1.10 branch.
 291     case `ovs-appctl version | sed 1q` in
 292         "ovs-vswitchd (Open vSwitch) 1."[0-9].*)
 293             action "Saving ofport values" ovs_save save-ofports \
 294                 "${script_ofports}"
 295             ;;
 296     esac
 297 }
 298
 299 save_interfaces () {
 300     "$datadir/scripts/ovs-save" save-interfaces ${ifaces} \
 301         > "${script_interfaces}"
 302 }
 303
 304 restore_ofports () {
 305     [ -x "${script_ofports}" ] && \
 306         action "Restoring ofport values" "${script_ofports}"
 307 }
 308
 309 flow_restore_wait () {
 310     ovs_vsctl set open_vswitch . other_config:flow-restore-wait="true"
 311 }
 312
 313 flow_restore_complete () {
 314     ovs_vsctl --if-exists remove open_vswitch . other_config \
 315         flow-restore-wait="true"
 316 }
 317
 318 restore_flows () {
 319     [ -x "${script_flows}" ] && \
 320         action "Restoring saved flows" "${script_flows}"
 321 }
 322
 323 restore_interfaces () {
 324     [ ! -x "${script_interfaces}" ] && return 0
 325     action "Restoring interface configuration" "${script_interfaces}"
 326     rc=$?
 327     if test $rc = 0; then
 328         level=debug
 329     else
 330         level=err
 331     fi
 332     log="logger -p daemon.$level -t ovs-save"
 333     $log "interface restore script exited with status $rc:"
 334     $log -f "$script_interfaces"
 335 }
 336
 337 init_restore_scripts () {
 338     script_interfaces=`mktemp`
 339     script_flows=`mktemp`
 340     script_ofports=`mktemp`
 341     trap 'rm -f "${script_interfaces}" "${script_flows}" "${script_ofports}"' 0
 342 }
 343
 344 force_reload_kmod () {
 345     ifaces=`internal_interfaces`
 346     action "Detected internal interfaces: $ifaces" true
 347
 348     init_restore_scripts
 349
 350     action "Saving flows" ovs_save save-flows "${script_flows}"
 351
 352     save_ofports_if_required
 353
 354     # Restart the database first, since a large database may take a
 355     # while to load, and we want to minimize forwarding disruption.
 356     stop_ovsdb
 357     start_ovsdb
 358
 359     # Restore of ofports should happen before vswitchd is restarted.
 360     restore_ofports
 361
 362     stop_forwarding
 363
 364     if action "Saving interface configuration" save_interfaces; then
 365         :
 366     else
 367         log_warning_msg "Failed to save configuration, not replacing kernel module"
 368         start_forwarding
 369         add_managers
 370         exit 1
 371     fi
 372     chmod +x "$script_interfaces"
 373
 374     for dp in `ovs-dpctl dump-dps`; do
 375         action "Removing datapath: $dp" ovs-dpctl del-dp "$dp"
 376     done
 377
 378     # try both old and new names in case this is post upgrade
 379     if test -e /sys/module/openvswitch_mod; then
 380         action "Removing openvswitch module" rmmod openvswitch_mod
 381     elif test -e /sys/module/openvswitch; then
 382         action "Removing openvswitch module" rmmod openvswitch
 383     fi
 384
 385     # Start vswitchd by asking it to wait till flow restore is finished.
 386     flow_restore_wait
 387     start_forwarding
 388
 389     # Restore saved flows and inform vswitchd that we are done.
 390     restore_flows
 391     flow_restore_complete
 392     add_managers
 393
 394     restore_interfaces
 395
 396     "$datadir/scripts/ovs-check-dead-ifs"
 397 }
 398
 399 ## ------- ##
 400 ## restart ##
 401 ## ------- ##
 402
 403 save_interfaces_if_required () {
 404     # Save interfaces if we are upgrading from a pre-1.10 branch.
 405     case `ovs-appctl version | sed 1q` in
 406         "ovs-vswitchd (Open vSwitch) 1."[0-9].*)
 407             ifaces=`internal_interfaces`
 408             action "Detected internal interfaces: $ifaces" true
 409             if action "Saving interface configuration" save_interfaces; then
 410                 chmod +x "$script_interfaces"
 411             fi
 412             ;;
 413     esac
 414 }
 415
 416 restart () {
 417     if daemon_is_running ovsdb-server && daemon_is_running ovs-vswitchd; then
 418         init_restore_scripts
 419         save_interfaces_if_required
 420         action "Saving flows" ovs_save save-flows "${script_flows}"
 421         save_ofports_if_required
 422     fi
 423
 424     # Restart the database first, since a large database may take a
 425     # while to load, and we want to minimize forwarding disruption.
 426     stop_ovsdb
 427     start_ovsdb
 428
 429     # Restore of ofports, if required, should happen before vswitchd is
 430     # restarted.
 431     restore_ofports
 432
 433     stop_forwarding
 434
 435     # Start vswitchd by asking it to wait till flow restore is finished.
 436     flow_restore_wait
 437     start_forwarding
 438
 439     # Restore saved flows and inform vswitchd that we are done.
 440     restore_flows
 441     flow_restore_complete
 442     add_managers
 443
 444     # Restore the interfaces if required. Return true even if restore fails.
 445     restore_interfaces || true
 446 }
 447
 448 ## --------------- ##
 449 ## enable-protocol ##
 450 ## --------------- ##
 451
 452 enable_protocol () {
 453     # Translate the protocol name to a number, because "iptables -n -L" prints
 454     # some protocols by name (despite the -n) and therefore we need to look for
 455     # both forms.
 456     #
 457     # (iptables -S output is more uniform but old iptables doesn't have it.)
 458     protonum=`grep "^$PROTOCOL[         ]" /etc/protocols | awk '{print $2}'`
 459     if expr X"$protonum" : X'[0-9]\{1,\}$' > /dev/null; then :; else
 460         log_failure_msg "unknown protocol $PROTOCOL"
 461         return 1
 462     fi
 463
 464     name=$PROTOCOL
 465     match="(\$2 == \"$PROTOCOL\" || \$2 == $protonum)"
 466     insert="iptables -I INPUT -p $PROTOCOL"
 467     if test X"$DPORT" != X; then
 468         name="$name to port $DPORT"
 469         match="$match && /dpt:$DPORT/"
 470         insert="$insert --dport $DPORT"
 471     fi
 472     if test X"$SPORT" != X; then
 473         name="$name from port $SPORT"
 474         match="$match && /spt:$SPORT/"
 475         insert="$insert --sport $SPORT"
 476     fi
 477     insert="$insert -j ACCEPT"
 478
 479     if (iptables -n -L INPUT) >/dev/null 2>&1; then
 480         if iptables -n -L INPUT | awk "$match { n++ } END { exit n == 0 }"
 481         then
 482             # There's already a rule for this protocol.  Don't override it.
 483             log_success_msg "iptables already has a rule for $name, not explicitly enabling"
 484         else
 485             action "Enabling $name with iptables" $insert
 486         fi
 487     elif (iptables --version) >/dev/null 2>&1; then
 488         action "cannot list iptables rules, not adding a rule for $name"
 489     else
 490         action "iptables binary not installed, not adding a rule for $name"
 491     fi
 492 }
 493
 494 ## ---- ##
 495 ## main ##
 496 ## ---- ##
 497
 498 set_defaults () {
 499     SYSTEM_ID=
 500
 501     DELETE_BRIDGES=no
 502
 503     DAEMON_CWD=/
 504     FORCE_COREFILES=yes
 505     MLOCKALL=yes
 506     OVSDB_SERVER_PRIORITY=-10
 507     OVS_VSWITCHD_PRIORITY=-10
 508     OVSDB_SERVER_WRAPPER=
 509     OVS_VSWITCHD_WRAPPER=
 510
 511     DB_FILE=$dbdir/conf.db
 512     DB_SOCK=$rundir/db.sock
 513     DB_SCHEMA=$datadir/vswitch.ovsschema
 514     EXTRA_DBS=
 515
 516     PROTOCOL=gre
 517     DPORT=
 518     SPORT=
 519
 520     type_file=$etcdir/system-type.conf
 521     version_file=$etcdir/system-version.conf
 522
 523     if test -e "$type_file" ; then
 524         SYSTEM_TYPE=`cat $type_file`
 525         SYSTEM_VERSION=`cat $version_file`
 526     elif (lsb_release --id) >/dev/null 2>&1; then
 527         SYSTEM_TYPE=`lsb_release --id -s`
 528         system_release=`lsb_release --release -s`
 529         system_codename=`lsb_release --codename -s`
 530         SYSTEM_VERSION="${system_release}-${system_codename}"
 531     else
 532         SYSTEM_TYPE=unknown
 533         SYSTEM_VERSION=unknown
 534     fi
 535 }
 536
 537 usage () {
 538     set_defaults
 539     cat <<EOF
 540 $0: controls Open vSwitch daemons
 541 usage: $0 [OPTIONS] COMMAND
 542
 543 This program is intended to be invoked internally by Open vSwitch startup
 544 scripts.  System administrators should not normally invoke it directly.
 545
 546 Commands:
 547   start              start Open vSwitch daemons
 548   stop               stop Open vSwitch daemons
 549   restart            stop and start Open vSwitch daemons
 550   status             check whether Open vSwitch daemons are running
 551   version            print versions of Open vSwitch daemons
 552   load-kmod          insert modules if not already present
 553   force-reload-kmod  save OVS network device state, stop OVS, unload kernel
 554                      module, reload kernel module, start OVS, restore state
 555   enable-protocol    enable protocol specified in options with iptables
 556   help               display this help message
 557
 558 One of the following options is required for "start", "restart" and "force-reload-kmod":
 559   --system-id=UUID   set specific ID to uniquely identify this system
 560   --system-id=random  use a random but persistent UUID to identify this system
 561
 562 Other important options for "start", "restart" and "force-reload-kmod":
 563   --system-type=TYPE  set system type (e.g. "XenServer")
 564   --system-version=VERSION  set system version (e.g. "5.6.100-39265p")
 565   --external-id="key=value"
 566                      add given key-value pair to Open_vSwitch external-ids
 567   --delete-bridges   delete all bridges just before starting ovs-vswitchd
 568
 569 Less important options for "start", "restart" and "force-reload-kmod":
 570   --daemon-cwd=DIR               set working dir for OVS daemons (default: $DAEMON_CWD)
 571   --no-force-corefiles           do not force on core dumps for OVS daemons
 572   --no-mlockall                  do not lock all of ovs-vswitchd into memory
 573   --ovsdb-server-priority=NICE   set ovsdb-server's niceness (default: $OVSDB_SERVER_PRIORITY)
 574   --ovs-vswitchd-priority=NICE   set ovs-vswitchd's niceness (default: $OVS_VSWITCHD_PRIORITY)
 575
 576 Debugging options for "start", "restart" and "force-reload-kmod":
 577   --ovsdb-server-wrapper=WRAPPER
 578   --ovs-vswitchd-wrapper=WRAPPER
 579   --ovs-vswitchd-wrapper=WRAPPER
 580      run specified daemon under WRAPPER (either 'valgrind' or 'strace')
 581
 582 File location options:
 583   --db-file=FILE     database file name (default: $DB_FILE)
 584   --db-sock=SOCKET   JSON-RPC socket name (default: $DB_SOCK)
 585   --db-schema=FILE   database schema file name (default: $DB_SCHEMA)
 586
 587 Options for "enable-protocol":
 588   --protocol=PROTOCOL  protocol to enable with iptables (default: gre)
 589   --sport=PORT       source port to match (for tcp or udp protocol)
 590   --dport=PORT       ddestination port to match (for tcp or udp protocol)
 591
 592 Other options:
 593   -h, --help                  display this help message
 594   -V, --version               display version information
 595
 596 Default directories with "configure" option and environment variable override:
 597   logs: @LOGDIR@ (--with-logdir, OVS_LOGDIR)
 598   pidfiles and sockets: @RUNDIR@ (--with-rundir, OVS_RUNDIR)
 599   conf.db: @DBDIR@ (--with-dbdir, OVS_DBDIR)
 600   system configuration: @sysconfdir@ (--sysconfdir, OVS_SYSCONFDIR)
 601   data files: @pkgdatadir@ (--pkgdatadir, OVS_PKGDATADIR)
 602   user binaries: @bindir@ (--bindir, OVS_BINDIR)
 603   system binaries: @sbindir@ (--sbindir, OVS_SBINDIR)
 604
 605 Please report bugs to bugs@openvswitch.org (see REPORTING-BUGS for details).
 606 EOF
 607
 608     exit 0
 609 }
 610
 611 set_option () {
 612     var=`echo "$option" | tr abcdefghijklmnopqrstuvwxyz- ABCDEFGHIJKLMNOPQRSTUVWXYZ_`
 613     eval set=\${$var+yes}
 614     eval old_value=\$$var
 615     if test X$set = X || \
 616         (test $type = bool && \
 617         test X"$old_value" != Xno && test X"$old_value" != Xyes); then
 618         echo >&2 "$0: unknown option \"$arg\" (use --help for help)"
 619         return
 620     fi
 621     eval $var=\$value
 622 }
 623
 624 daemons () {
 625     echo ovsdb-server ovs-vswitchd
 626 }
 627
 628 set_defaults
 629 extra_ids=
 630 command=
 631 for arg
 632 do
 633     case $arg in
 634         -h | --help)
 635             usage
 636             ;;
 637         -V | --version)
 638             echo "$0 (Open vSwitch) $VERSION"
 639             exit 0
 640             ;;
 641         --external-id=*)
 642             value=`expr X"$arg" : 'X[^=]*=\(.*\)'`
 643             case $value in
 644                 *=*)
 645                     extra_ids="$extra_ids external-ids:$value"
 646                     ;;
 647                 *)
 648                     echo >&2 "$0: --external-id argument not in the form \"key=value\""
 649                     exit 1
 650                     ;;
 651             esac
 652             ;;
 653         --[a-z]*=*)
 654             option=`expr X"$arg" : 'X--\([^=]*\)'`
 655             value=`expr X"$arg" : 'X[^=]*=\(.*\)'`
 656             type=string
 657             set_option
 658             ;;
 659         --no-[a-z]*)
 660             option=`expr X"$arg" : 'X--no-\(.*\)'`
 661             value=no
 662             type=bool
 663             set_option
 664             ;;
 665         --[a-z]*)
 666             option=`expr X"$arg" : 'X--\(.*\)'`
 667             value=yes
 668             type=bool
 669             set_option
 670             ;;
 671         -*)
 672             echo >&2 "$0: unknown option \"$arg\" (use --help for help)"
 673             exit 1
 674             ;;
 675         *)
 676             if test X"$command" = X; then
 677                 command=$arg
 678             else
 679                 echo >&2 "$0: exactly one non-option argument required (use --help for help)"
 680                 exit 1
 681             fi
 682             ;;
 683     esac
 684 done
 685 case $command in
 686     start)
 687         start_ovsdb
 688         start_forwarding
 689         add_managers
 690         ;;
 691     stop)
 692         stop_forwarding
 693         stop_ovsdb
 694         ;;
 695     restart)
 696         restart
 697         ;;
 698     status)
 699         rc=0
 700         for daemon in `daemons`; do
 701             daemon_status $daemon || rc=$?
 702         done
 703         exit $rc
 704         ;;
 705     version)
 706         for daemon in `daemons`; do
 707             $daemon --version
 708         done
 709         ;;
 710     force-reload-kmod)
 711             force_reload_kmod
 712         ;;
 713     load-kmod)
 714         insert_mod_if_required
 715         ;;
 716     enable-protocol)
 717         enable_protocol
 718         ;;
 719     help)
 720         usage
 721         ;;
 722     '')
 723         echo >&2 "$0: missing command name (use --help for help)"
 724         exit 1
 725         ;;
 726     *)
 727         echo >&2 "$0: unknown command \"$command\" (use --help for help)"
 728         exit 1
 729         ;;
 730 esac