+ return (&{$commands{$cmd}->{func}}(@cmdline));
+}
+
+
+# select the OBD device we talk to
+sub Device {
+ my $device = shift;
+
+ if ($::client_id) {
+ print "Disconnecting active session ($::client_id)...";
+ Disconnect($::client_id);
+ }
+ if (! $device ) {
+ $device = "/dev/obd0";
+ }
+ $::device = $device;
+ # Open the device, as we need an FD for the ioctl
+ sysopen(DEV_OBD, $device, 0) || die "Cannot open $device";
+ print "Device now $device\n";
+}
+
+
+sub Attach {
+ my $err = 0;
+ my $type = shift;
+ my $data;
+ my $datalen = 0;
+
+ if ( ! $type ) {
+ print "error: missing type\n";
+usage:
+ print "usage: attach {ext2_obd | snap_obd | scsi_obd}\n";
+ return;
+ }
+
+ if ($type eq "scsi_obd" ) {
+ my $adapter = shift;
+ my $bus = shift;
+ my $tid = shift;
+ my $lun = shift;
+
+ $data = pack("iiii", $adapter, $bus, $tid, $lun);
+ $datalen = 4 * 4;
+ } elsif ($type eq "snap_obd" ) {
+ my $snapdev = shift;
+ my $snapidx = shift;
+ my $tableno = shift;
+
+ $data = pack("iii", $snapdev, $snapidx, $tableno);
+ $datalen = 3 * 4;
+ } elsif ($type eq "ext2_obd") {
+ $data = pack("i", 4711); # bogus data
+ $datalen = 0;
+ } else {
+ print "error: unknown attach type $type\n";
+ goto usage;
+ }
+
+ my $len = length($type);
+ my $cl = length($data);
+
+ print "type $type (len $len), datalen $datalen ($cl)\n";
+ my $packed = pack("Lipip", $::client_id, length($type), $type, $datalen, $data);
+
+ my $rc = ioctl(DEV_OBD, &OBD_IOC_ATTACH, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+
+sub Detach {
+ my $err = 0;
+ my $data = "";
+ my $rc = ioctl(DEV_OBD, &OBD_IOC_DETACH, $data);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+
+sub TestExt2Iterator {
+ if (!defined($::client_id)) {
+ print "You must first ``connect''.\n";
+ return;
+ }
+
+ my $err = 0;
+ my $type = "ext2_obd";
+
+ $data = pack("i", 4711); # bogus data
+ $datalen = 4;
+
+ my $len = length($type);
+ my $cl = length($data);
+ print "type $type (len $len), datalen $datalen ($cl)\n";
+ my $packed = pack("Lipip", $::client_id, length($type), $type, $datalen, $data);
+
+ my $rc = ioctl(DEV_OBD, &OBD_EXT2_RUNIT, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+
+sub SnapDelete {
+ if (!defined($::client_id)) {
+ print "You must first ``connect''.\n";
+ return;
+ }
+
+ my $err = 0;
+ my $type = "snap_obd";
+
+ $data = pack("i", 4711); # bogus data
+ $datalen = 4;
+
+ my $len = length($type);
+ my $cl = length($data);
+ print "type $type (len $len), datalen $datalen ($cl)\n";
+ my $packed = pack("Lipip", $::client_id, length($type), $type, $datalen, $data);
+
+ # XXX We need to fix this up so that after the objects in this snapshot
+ # are deleted, the snapshot itself is also removed from the table.
+ my $rc = ioctl(DEV_OBD, &OBD_SNAP_DELETE, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+
+# this routine does the whole job
+sub SnapRestore {
+ my $restoreto = shift;
+ my $snaptable = shift;
+ my $tableno = shift;
+ my $restoretime;
+
+ # don't do anything until connected
+ if (!defined($::client_id)) {
+ print "You must first ``connect''.\n";
+ return;
+ }
+
+ if ( ! $snaptable || ! defined $restoreto ) {
+ print "Usage: snaprestore \"restore to slot\" \"snaptable\" \"tableno\"\n";
+ return;
+ }
+
+ if ( ! -f $snaptable ) {
+ print "Table $snaptable doesn't exist\n";
+ return;
+ }
+
+ my $table = ReadSnapShotTable($snaptable);
+ $restoretime = FindSnapInTable($table, $restoreto);
+ if ( ! defined $table->{0} || ! defined $restoretime ) {
+ PrintSnapShotTable($table);
+ print "No current or $restoreto slot in this table\n";
+ return;
+ }
+
+ my $currentindex = $table->{0};
+ if ( $table->{$restoretime} == $currentindex ) {
+ print "You should not restore to the current snapshot\n";
+ return;
+ }
+
+ # swap the entries for 0 and $restoreto
+ my $tmp = $table->{$restoretime};
+ $table->{$restoretime} = $table->{0};
+ $table->{0} = $tmp;
+ # PrintSnapShotTable($table);
+
+ # write it back
+ WriteSnapShotTable($snaptable, $table);
+
+ # set it in the kernel
+ SnapSetTable($tableno, $snaptable);
+
+ # ready for the ioctl
+ my $err = 0;
+ my $type = "snap_obd";
+ $data = pack("i", $currentindex); # slot of previous current snapshot
+ $datalen = 4;
+
+ my $len = length($type);
+ my $cl = length($data);
+ my $packed = pack("Lipip", $::client_id, length($type), $type, $datalen, $data);
+
+ my $rc = ioctl(DEV_OBD, &OBD_SNAP_RESTORE, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Snaprestore finished (success)\n";
+ delete $table->{$restoretime} if defined $restoretime;
+ # write it back
+ WriteSnapShotTable($snaptable, $table);
+
+ # set it in the kernel
+ SnapSetTable($tableno, $snaptable);
+ # PrintSnapShotTable($table);
+
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+sub FindSnapInTable {
+ my $table = shift;
+ my $snapno =shift;
+
+ foreach my $restoretime ( keys %{$table} ) {
+ if ( $table->{$restoretime} == $snapno) {
+ print "Found key $restoretime for snapno $snapno\n";
+ return $restoretime;
+ }
+ }
+ undef;
+}
+
+
+sub SnapPrint {
+ my $err = 0;
+ my $type = "snap_obd";
+ my $snaptableno = shift;
+
+ $data = pack("i", $snaptableno);
+ $datalen = 4;
+
+ my $len = length($type);
+ my $cl = length($data);
+ print "type $type (len $len), datalen $datalen ($cl)\n";
+ my $packed = pack("Lipip", $::client_id, length($type), $type, $datalen, $data);
+
+ my $rc = ioctl(DEV_OBD, &OBD_SNAP_PRINTTABLE, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+sub SnapSetTable {
+ my $err = 0;
+ my $type = "snap_obd";
+ my $snaptableno = shift;
+ my $file = shift;
+ my $snapcount;
+ my $table = {};
+ my $data;
+ my $datalen = 0;
+
+ if ( ! -f $file ) {
+ print "No such file $file\n";
+ }
+
+ $table = ReadSnapShotTable($file);
+
+ $snapcount = keys %{$table};
+ print "Snapcount $snapcount\n";
+
+ if ( ! defined $table->{0} ) {
+ print "No current snapshot in table! First make one\n";
+ return ;
+ }
+ $data = pack("ii", $snaptableno, $snapcount);
+ $datalen = 2 * 4;
+ foreach my $time (sort keys %{$table}) {
+ # XXX we should change to pack LL instead of I for times
+ $data .= pack("Ii", $time, $table->{$time});
+ $datalen += 8;
+ }
+
+ my $len = length($type);
+ my $cl = length($data);
+ print "type $type (len $len), datalen $datalen ($cl)\n";
+ my $packed = pack("Lipip", $::client_id, length($type), $type, $datalen, $data);
+
+ my $rc = ioctl(DEV_OBD, &OBD_SNAP_SETTABLE, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+
+sub SnapShotTable {
+
+ my $file = &readl("enter file name: ");
+ if ( ! -f $file ) {
+ `touch $file`;
+ }
+ my $table = ReadSnapShotTable($file);
+
+ again:
+ PrintSnapShotTable($table);
+ my $action = &readl("Add, Delete or Quit [adq]: ");
+ goto done if ($action =~ "^q.*" );
+ goto add if ($action =~ "^a.*");
+ goto del if ($action =~ "^d.*");
+ goto again;
+
+ add:
+ my $idx = &readl("enter index where you want this snapshot: ");
+ my $time = &readl("enter time or 'now' or 'current': ");
+ my $oldtime = SnapFindTimeFromIdx($idx, $table);
+ if (defined $oldtime) {
+ print "This already exists, first clean up\n";
+ goto again;
+ }
+
+ if ( $time eq 'now' ) {
+ $time = time;
+ } elsif ( $time eq 'current' ) {
+ $time = 0;
+ }
+ $table->{$time} = $idx;
+ goto again;
+
+ del:
+ $didx = &readl("Enter index to delete: ");
+ my $deltime = SnapFindTimeFromIdx($didx, $table);
+ delete $table->{$deltime} if defined $deltime;
+ goto again;
+
+ done:
+ my $ok = &readl("OK with new table? [Yn]: ");
+ unless ( $ok eq "n" ) {
+ WriteSnapShotTable($file, $table);
+ }
+}
+
+sub SnapFindTimeFromIdx {
+ my $idx = shift;
+ my $table = shift;
+
+ foreach my $time ( keys %{$table} ) {
+ if ( $table->{$time} == $idx ) {
+ return $time;
+ }
+ }
+ undef;
+}
+
+sub PrintSnapShotTable {
+ my $table = shift;
+ my $time;
+
+ foreach $time ( sort keys %{$table} ) {
+ my $stime = localtime($time);
+ if ( ! $time ) {
+ $stime = "current";
+ }
+ printf "Time: %s -- Index %d\n", $stime, $table->{$time};
+ }
+}
+
+sub ReadSnapShotTable {
+
+ my $file = shift;
+ my $table = {};
+
+ open FH, "<$file";
+ while ( <FH> ) {
+ my ($time, $index) = split ;
+ $table->{$time} = $index;
+ }
+ close FH;
+
+ PrintSnapShotTable($table);
+
+ return $table;
+}
+
+sub WriteSnapShotTable {
+ my $file = shift;
+ my $table = shift;
+
+ open FH, ">$file";
+ foreach my $time ( sort keys %{$table} ) {
+ print FH "$time $table->{$time}\n";
+ }
+ close FH;
+}
+
+sub Copy {
+ my $err = 0;
+ my $src_obdo;
+ my $dst_obdo;
+
+ # Note: _copy IOCTL takes parameters as dst, src.
+ # Copy function takes parameters as src, dst.
+ $src_obdo->{id} = shift;
+ $dst_obdo->{id} = shift;
+ $src_obdo->{valid} = &OBD_MD_FLALL;
+
+ # XXX need to fix copy so we can have 2 client IDs here
+ my $packed = pack("L", $::client_id) . obdo_pack($dst_obdo) . pack("L", $::client_id) . obdo_pack($src_obdo);
+
+ my $rc = ioctl(DEV_OBD, &OBD_IOC_COPY, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+sub Migrate {
+ my $err = 0;
+
+ # Note: _migr IOCTL takes parameters as dst, src.
+ # Migrate function takes parameters as src, dst.
+ $src_obdo->{id} = shift;
+ $dst_obdo->{id} = shift;
+ $src_obdo->{valid} = &OBD_MD_FLALL;
+
+ # We pack a dummy connection ID here
+ my $packed = pack("L", $::client_id) . obdo_pack($dst_obdo) . pack("L", $::client_id) . obdo_pack($src_obdo);
+
+ my $rc = ioctl(DEV_OBD, &OBD_IOC_MIGR, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+
+sub Format {
+ my $err = 0;
+ my $size = shift;
+ my $data = pack("i", $size);
+ my $datalen = 4;
+
+ my $packed = pack("ip", $datalen, $data);
+ my $rc = ioctl(DEV_OBD, &OBD_IOC_FORMATOBD, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }
+}
+
+sub Partition {
+ my $err = 0;
+ my $partno = shift;
+ my $size = shift;
+ my $data = pack("ii", $partno, $size);
+ my $datalen = 2 * 4;
+
+ my $packed = pack("ip", $datalen, $data);
+ my $rc = ioctl(DEV_OBD, &OBD_IOC_PARTITION, $packed);
+
+ if (!defined $rc) {
+ print STDERR "ioctl failed: $!\n";
+ } elsif ($rc eq "0 but true") {
+ print "Finished (success)\n";
+ } else {
+ print "ioctl returned error code $rc.\n";
+ }