[qemu-server.git] / PVE / QemuConfig.pm

package PVE::QemuConfig;

use strict;
use warnings;

use PVE::AbstractConfig;
use PVE::INotify;
use PVE::QemuServer;
use PVE::Storage;
use PVE::Tools;

use base qw(PVE::AbstractConfig);

my $nodename = PVE::INotify::nodename();

mkdir "/etc/pve/nodes/$nodename";
my $confdir = "/etc/pve/nodes/$nodename/qemu-server";
mkdir $confdir;

my $lock_dir = "/var/lock/qemu-server";
mkdir $lock_dir;

my $MAX_UNUSED_DISKS = 8;

# BEGIN implemented abstract methods from PVE::AbstractConfig

sub guest_type {
    return "VM";
}

sub __config_max_unused_disks {
    my ($class) = @_;

    return $MAX_UNUSED_DISKS;
}

sub config_file_lock {
    my ($class, $vmid) = @_;

    return "$lock_dir/lock-$vmid.conf";
}

sub cfs_config_path {
    my ($class, $vmid, $node) = @_;

    $node = $nodename if !$node;
    return "nodes/$node/qemu-server/$vmid.conf";
}

sub has_feature {
    my ($class, $feature, $conf, $storecfg, $snapname, $running, $backup_only) = @_;

    my $err;
    PVE::QemuServer::foreach_drive($conf, sub {
	my ($ds, $drive) = @_;

	return if PVE::QemuServer::drive_is_cdrom($drive);
	return if $backup_only && !$drive->{backup};
	my $volid = $drive->{file};
	$err = 1 if !PVE::Storage::volume_has_feature($storecfg, $feature, $volid, $snapname, $running);
   });

    return $err ? 0 : 1;
}

sub get_replicatable_volumes {
    my ($class, $storecfg, $vmid, $conf, $cleanup, $noerr) = @_;

    my $volhash = {};

    my $test_volid = sub {
	my ($volid, $attr) = @_;

	my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid, $noerr);
	return if !$storeid;

	my $scfg = storage_config($storecfg, $storeid);
	return if $scfg->{shared};

	return if $attr->{cdrom};

	return if !$cleanup && !$attr->{replicate};

	if (!PVE::Storage::volume_has_feature($storecfg, 'replicate', $volid)) {
	    return if $cleanup || $noerr;
	    die "missing replicate feature on volume '$volid'\n";
	}

	$volhash->{$volid} = 1;
    };

    PVE::QemuServer::foreach_volid($conf, $test_volid);

    return $volhash;
}

sub __snapshot_save_vmstate {
    my ($class, $vmid, $conf, $snapname, $storecfg) = @_;

    my $snap = $conf->{snapshots}->{$snapname};

    my $target;

    # search shared storage first
    PVE::QemuServer::foreach_writable_storage($conf, sub {
	my ($sid) = @_;
	my $scfg = PVE::Storage::storage_config($storecfg, $sid);
	return if !$scfg->{shared};

	$target = $sid if !$target || $scfg->{path}; # prefer file based storage
    });

    if (!$target) {
	# now search local storage
	PVE::QemuServer::foreach_writable_storage($conf, sub {
	    my ($sid) = @_;
	    my $scfg = PVE::Storage::storage_config($storecfg, $sid);
	    return if $scfg->{shared};

	    $target = $sid if !$target || $scfg->{path}; # prefer file based storage;
	});
    }

    $target = 'local' if !$target;

    my $driver_state_size = 500; # assume 32MB is enough to safe all driver state;
    # we abort live save after $conf->{memory}, so we need at max twice that space
    my $size = $conf->{memory}*2 + $driver_state_size;

    my $name = "vm-$vmid-state-$snapname";
    my $scfg = PVE::Storage::storage_config($storecfg, $target);
    $name .= ".raw" if $scfg->{path}; # add filename extension for file base storage
    $snap->{vmstate} = PVE::Storage::vdisk_alloc($storecfg, $target, $vmid, 'raw', $name, $size*1024);
    # always overwrite machine if we save vmstate. This makes sure we
    # can restore it later using correct machine type
    $snap->{machine} = PVE::QemuServer::get_current_qemu_machine($vmid);
}

sub __snapshot_check_running {
    my ($class, $vmid) = @_;
    return PVE::QemuServer::check_running($vmid);
}

sub __snapshot_check_freeze_needed {
    my ($class, $vmid, $config, $save_vmstate) = @_;

    my $running = $class->__snapshot_check_running($vmid);
    if ($save_vmstate) {
	return ($running, $running && $config->{agent} && PVE::QemuServer::qga_check_running($vmid));
    } else {
	return ($running, 0);
    }
}

sub __snapshot_freeze {
    my ($class, $vmid, $unfreeze) = @_;

    if ($unfreeze) {
	eval { PVE::QemuServer::vm_mon_cmd($vmid, "guest-fsfreeze-thaw"); };
	warn "guest-fsfreeze-thaw problems - $@" if $@;
    } else {
	eval { PVE::QemuServer::vm_mon_cmd($vmid, "guest-fsfreeze-freeze"); };
	warn "guest-fsfreeze-freeze problems - $@" if $@;
    }
}

sub __snapshot_create_vol_snapshots_hook {
    my ($class, $vmid, $snap, $running, $hook) = @_;

    if ($running) {
	my $storecfg = PVE::Storage::config();

	if ($hook eq "before") {
	    if ($snap->{vmstate}) {
		my $path = PVE::Storage::path($storecfg, $snap->{vmstate});
		PVE::Storage::activate_volumes($storecfg, [$snap->{vmstate}]);

		PVE::QemuServer::vm_mon_cmd($vmid, "savevm-start", statefile => $path);
		for(;;) {
		    my $stat = PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "query-savevm");
		    if (!$stat->{status}) {
			die "savevm not active\n";
		    } elsif ($stat->{status} eq 'active') {
			sleep(1);
			next;
		    } elsif ($stat->{status} eq 'completed') {
			last;
		    } else {
			die "query-savevm returned status '$stat->{status}'\n";
		    }
		}
	    } else {
		PVE::QemuServer::vm_mon_cmd($vmid, "savevm-start");
	    }
	} elsif ($hook eq "after") {
	    eval { 
		PVE::QemuServer::vm_mon_cmd($vmid, "savevm-end");
		PVE::Storage::deactivate_volumes($storecfg, [$snap->{vmstate}]) if $snap->{vmstate};
	    };
	    warn $@ if $@;
	} elsif ($hook eq "after-freeze") {
	    # savevm-end is async, we need to wait
	    for (;;) {
		my $stat = PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "query-savevm");
		if (!$stat->{bytes}) {
		    last;
		} else {
		    print "savevm not yet finished\n";
		    sleep(1);
		    next;
		}
	    }
	}
    }
}

sub __snapshot_create_vol_snapshot {
    my ($class, $vmid, $ds, $drive, $snapname) = @_;

    return if PVE::QemuServer::drive_is_cdrom($drive);

    my $volid = $drive->{file};
    my $device = "drive-$ds";
    my $storecfg = PVE::Storage::config();

    PVE::QemuServer::qemu_volume_snapshot($vmid, $device, $storecfg, $volid, $snapname);
}

sub __snapshot_delete_remove_drive {
    my ($class, $snap, $remove_drive) = @_;

    if ($remove_drive eq 'vmstate') {
	delete $snap->{$remove_drive};
    } else {
	my $drive = PVE::QemuServer::parse_drive($remove_drive, $snap->{$remove_drive});
	return if PVE::QemuServer::drive_is_cdrom($drive);

	my $volid = $drive->{file};
	delete $snap->{$remove_drive};
	$class->add_unused_volume($snap, $volid);
    }
}

sub __snapshot_delete_vmstate_file {
    my ($class, $snap, $force) = @_;

    my $storecfg = PVE::Storage::config();

    eval {  PVE::Storage::vdisk_free($storecfg, $snap->{vmstate}); };
    if (my $err = $@) {
	die $err if !$force;
	warn $err;
    }
}

sub __snapshot_delete_vol_snapshot {
    my ($class, $vmid, $ds, $drive, $snapname, $unused) = @_;

    return if PVE::QemuServer::drive_is_cdrom($drive);
    my $storecfg = PVE::Storage::config();
    my $volid = $drive->{file};
    my $device = "drive-$ds";

    PVE::QemuServer::qemu_volume_snapshot_delete($vmid, $device, $storecfg, $volid, $snapname);

    push @$unused, $volid;
}

sub __snapshot_rollback_vol_possible {
    my ($class, $drive, $snapname) = @_;

    return if PVE::QemuServer::drive_is_cdrom($drive);

    my $storecfg = PVE::Storage::config();
    my $volid = $drive->{file};

    PVE::Storage::volume_rollback_is_possible($storecfg, $volid, $snapname);
}

sub __snapshot_rollback_vol_rollback {
    my ($class, $drive, $snapname) = @_;

    return if PVE::QemuServer::drive_is_cdrom($drive);

    my $storecfg = PVE::Storage::config();
    PVE::Storage::volume_snapshot_rollback($storecfg, $drive->{file}, $snapname);
}

sub __snapshot_rollback_vm_stop {
    my ($class, $vmid) = @_;

    my $storecfg = PVE::Storage::config();
    PVE::QemuServer::vm_stop($storecfg, $vmid, undef, undef, 5, undef, undef);
}

sub __snapshot_rollback_vm_start {
    my ($class, $vmid, $vmstate, $forcemachine) = @_;

    my $storecfg = PVE::Storage::config();
    my $statefile = PVE::Storage::path($storecfg, $vmstate);
    PVE::QemuServer::vm_start($storecfg, $vmid, $statefile, undef, undef, undef, $forcemachine);
}

sub __snapshot_rollback_get_unused {
    my ($class, $conf, $snap) = @_;

    my $unused = [];

    $class->__snapshot_foreach_volume($conf, sub {
	my ($vs, $volume) = @_;

	return if PVE::QemuServer::drive_is_cdrom($volume);

	my $found = 0;
	my $volid = $volume->{file};

	$class->__snapshot_foreach_volume($snap, sub {
	    my ($ds, $drive) = @_;

	    return if $found;
	    return if PVE::QemuServer::drive_is_cdrom($drive);

	    $found = 1
		if ($drive->{file} && $drive->{file} eq $volid);
	});

	push @$unused, $volid if !$found;
    });

    return $unused;
}

sub __snapshot_foreach_volume {
    my ($class, $conf, $func) = @_;

    PVE::QemuServer::foreach_drive($conf, $func);
}
# END implemented abstract methods from PVE::AbstractConfig

1;
Commit	Line	Data
ffda963f FG	1	package PVE::QemuConfig;
	2
	3	use strict;
	4	use warnings;
	5
b2c9558d FG	6	use PVE::AbstractConfig;
	7	use PVE::INotify;
	8	use PVE::QemuServer;
	9	use PVE::Storage;
	10	use PVE::Tools;
	11
ffda963f FG	12	use base qw(PVE::AbstractConfig);
	13
	14	my $nodename = PVE::INotify::nodename();
	15
	16	mkdir "/etc/pve/nodes/$nodename";
	17	my $confdir = "/etc/pve/nodes/$nodename/qemu-server";
	18	mkdir $confdir;
	19
	20	my $lock_dir = "/var/lock/qemu-server";
	21	mkdir $lock_dir;
	22
	23	my $MAX_UNUSED_DISKS = 8;
	24
	25	# BEGIN implemented abstract methods from PVE::AbstractConfig
	26
	27	sub guest_type {
	28	return "VM";
	29	}
	30
	31	sub __config_max_unused_disks {
3aa44d3b	32	my ($class) = @_;
ffda963f FG	33
	34	return $MAX_UNUSED_DISKS;
	35	}
	36
	37	sub config_file_lock {
	38	my ($class, $vmid) = @_;
	39
	40	return "$lock_dir/lock-$vmid.conf";
	41	}
	42
	43	sub cfs_config_path {
	44	my ($class, $vmid, $node) = @_;
	45
	46	$node = $nodename if !$node;
	47	return "nodes/$node/qemu-server/$vmid.conf";
	48	}
	49
b2c9558d FG	50	sub has_feature {
	51	my ($class, $feature, $conf, $storecfg, $snapname, $running, $backup_only) = @_;
	52
	53	my $err;
	54	PVE::QemuServer::foreach_drive($conf, sub {
	55	my ($ds, $drive) = @_;
	56
	57	return if PVE::QemuServer::drive_is_cdrom($drive);
	58	return if $backup_only && !$drive->{backup};
	59	my $volid = $drive->{file};
	60	$err = 1 if !PVE::Storage::volume_has_feature($storecfg, $feature, $volid, $snapname, $running);
	61	});
	62
	63	return $err ? 0 : 1;
	64	}
	65
3aa44d3b	66	sub get_replicatable_volumes {
c78f43b9	67	my ($class, $storecfg, $vmid, $conf, $cleanup, $noerr) = @_;
3aa44d3b DM	68
	69	my $volhash = {};
	70
	71	my $test_volid = sub {
f949eb77	72	my ($volid, $attr) = @_;
3aa44d3b	73
a722d4ff DM	74	my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid, $noerr);
	75	return if !$storeid;
	76
	77	my $scfg = storage_config($storecfg, $storeid);
	78	return if $scfg->{shared};
	79
f949eb77	80	return if $attr->{cdrom};
3aa44d3b	81
f949eb77	82	return if !$cleanup && !$attr->{replicate};
3aa44d3b DM	83
3aa44d3b DM	84	if (!PVE::Storage::volume_has_feature($storecfg, 'replicate', $volid)) {
e5857ca8	85	return if $cleanup \|\| $noerr;
3aa44d3b DM	86	die "missing replicate feature on volume '$volid'\n";
	87	}
	88
	89	$volhash->{$volid} = 1;
	90	};
	91
f949eb77	92	PVE::QemuServer::foreach_volid($conf, $test_volid);
3aa44d3b DM	93
	94	return $volhash;
	95	}
	96
b2c9558d FG	97	sub __snapshot_save_vmstate {
	98	my ($class, $vmid, $conf, $snapname, $storecfg) = @_;
	99
	100	my $snap = $conf->{snapshots}->{$snapname};
	101
	102	my $target;
	103
	104	# search shared storage first
	105	PVE::QemuServer::foreach_writable_storage($conf, sub {
	106	my ($sid) = @_;
	107	my $scfg = PVE::Storage::storage_config($storecfg, $sid);
	108	return if !$scfg->{shared};
	109
	110	$target = $sid if !$target \|\| $scfg->{path}; # prefer file based storage
	111	});
	112
	113	if (!$target) {
	114	# now search local storage
	115	PVE::QemuServer::foreach_writable_storage($conf, sub {
	116	my ($sid) = @_;
	117	my $scfg = PVE::Storage::storage_config($storecfg, $sid);
	118	return if $scfg->{shared};
	119
	120	$target = $sid if !$target \|\| $scfg->{path}; # prefer file based storage;
	121	});
	122	}
	123
	124	$target = 'local' if !$target;
	125
	126	my $driver_state_size = 500; # assume 32MB is enough to safe all driver state;
	127	# we abort live save after $conf->{memory}, so we need at max twice that space
	128	my $size = $conf->{memory}*2 + $driver_state_size;
	129
	130	my $name = "vm-$vmid-state-$snapname";
	131	my $scfg = PVE::Storage::storage_config($storecfg, $target);
	132	$name .= ".raw" if $scfg->{path}; # add filename extension for file base storage
	133	$snap->{vmstate} = PVE::Storage::vdisk_alloc($storecfg, $target, $vmid, 'raw', $name, $size*1024);
	134	# always overwrite machine if we save vmstate. This makes sure we
	135	# can restore it later using correct machine type
	136	$snap->{machine} = PVE::QemuServer::get_current_qemu_machine($vmid);
	137	}
	138
	139	sub __snapshot_check_running {
	140	my ($class, $vmid) = @_;
	141	return PVE::QemuServer::check_running($vmid);
	142	}
	143
	144	sub __snapshot_check_freeze_needed {
	145	my ($class, $vmid, $config, $save_vmstate) = @_;
	146
	147	my $running = $class->__snapshot_check_running($vmid);
	148	if ($save_vmstate) {
	149	return ($running, $running && $config->{agent} && PVE::QemuServer::qga_check_running($vmid));
	150	} else {
	151	return ($running, 0);
	152	}
	153	}
	154
	155	sub __snapshot_freeze {
	156	my ($class, $vmid, $unfreeze) = @_;
	157
	158	if ($unfreeze) {
	159	eval { PVE::QemuServer::vm_mon_cmd($vmid, "guest-fsfreeze-thaw"); };
	160	warn "guest-fsfreeze-thaw problems - $@" if $@;
161	} else {
162	eval { PVE::QemuServer::vm_mon_cmd($vmid, "guest-fsfreeze-freeze"); };
163	warn "guest-fsfreeze-freeze problems - $@" if $@;
164	}
165	}
166
167	sub __snapshot_create_vol_snapshots_hook {
168	my ($class, $vmid, $snap, $running, $hook) = @_;
169
170	if ($running) {
3a8deb55 AD	171	my $storecfg = PVE::Storage::config();
3a8deb55 AD	172
b2c9558d FG	173	if ($hook eq "before") {
b2c9558d FG	174	if ($snap->{vmstate}) {
b2c9558d	175	my $path = PVE::Storage::path($storecfg, $snap->{vmstate});
3a8deb55 AD	176	PVE::Storage::activate_volumes($storecfg, [$snap->{vmstate}]);
3a8deb55 AD	177
b2c9558d FG	178	PVE::QemuServer::vm_mon_cmd($vmid, "savevm-start", statefile => $path);
	179	for(;;) {
	180	my $stat = PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "query-savevm");
	181	if (!$stat->{status}) {
	182	die "savevm not active\n";
	183	} elsif ($stat->{status} eq 'active') {
	184	sleep(1);
	185	next;
	186	} elsif ($stat->{status} eq 'completed') {
	187	last;
	188	} else {
	189	die "query-savevm returned status '$stat->{status}'\n";
	190	}
	191	}
	192	} else {
	193	PVE::QemuServer::vm_mon_cmd($vmid, "savevm-start");
	194	}
	195	} elsif ($hook eq "after") {
3a8deb55 AD	196	eval {
	197	PVE::QemuServer::vm_mon_cmd($vmid, "savevm-end");
	198	PVE::Storage::deactivate_volumes($storecfg, [$snap->{vmstate}]) if $snap->{vmstate};
	199	};
b2c9558d FG	200	warn $@ if $@;
	201	} elsif ($hook eq "after-freeze") {
	202	# savevm-end is async, we need to wait
	203	for (;;) {
	204	my $stat = PVE::QemuServer::vm_mon_cmd_nocheck($vmid, "query-savevm");
	205	if (!$stat->{bytes}) {
	206	last;
	207	} else {
	208	print "savevm not yet finished\n";
	209	sleep(1);
	210	next;
	211	}
	212	}
	213	}
	214	}
	215	}
	216
	217	sub __snapshot_create_vol_snapshot {
	218	my ($class, $vmid, $ds, $drive, $snapname) = @_;
	219
	220	return if PVE::QemuServer::drive_is_cdrom($drive);
	221
	222	my $volid = $drive->{file};
	223	my $device = "drive-$ds";
	224	my $storecfg = PVE::Storage::config();
	225
	226	PVE::QemuServer::qemu_volume_snapshot($vmid, $device, $storecfg, $volid, $snapname);
	227	}
	228
	229	sub __snapshot_delete_remove_drive {
	230	my ($class, $snap, $remove_drive) = @_;
	231
	232	if ($remove_drive eq 'vmstate') {
	233	delete $snap->{$remove_drive};
	234	} else {
	235	my $drive = PVE::QemuServer::parse_drive($remove_drive, $snap->{$remove_drive});
	236	return if PVE::QemuServer::drive_is_cdrom($drive);
	237
	238	my $volid = $drive->{file};
	239	delete $snap->{$remove_drive};
	240	$class->add_unused_volume($snap, $volid);
	241	}
	242	}
	243
	244	sub __snapshot_delete_vmstate_file {
	245	my ($class, $snap, $force) = @_;
	246
	247	my $storecfg = PVE::Storage::config();
	248
	249	eval { PVE::Storage::vdisk_free($storecfg, $snap->{vmstate}); };
	250	if (my $err = $@) {
	251	die $err if !$force;
	252	warn $err;
	253	}
	254	}
	255
	256	sub __snapshot_delete_vol_snapshot {
	257	my ($class, $vmid, $ds, $drive, $snapname, $unused) = @_;
	258
	259	return if PVE::QemuServer::drive_is_cdrom($drive);
	260	my $storecfg = PVE::Storage::config();
	261	my $volid = $drive->{file};
	262	my $device = "drive-$ds";
	263
264	PVE::QemuServer::qemu_volume_snapshot_delete($vmid, $device, $storecfg, $volid, $snapname);
265
266	push @$unused, $volid;
267	}
268
269	sub __snapshot_rollback_vol_possible {
270	my ($class, $drive, $snapname) = @_;
271
272	return if PVE::QemuServer::drive_is_cdrom($drive);
273
274	my $storecfg = PVE::Storage::config();
275	my $volid = $drive->{file};
276
277	PVE::Storage::volume_rollback_is_possible($storecfg, $volid, $snapname);
278	}
279
280	sub __snapshot_rollback_vol_rollback {
281	my ($class, $drive, $snapname) = @_;
282
283	return if PVE::QemuServer::drive_is_cdrom($drive);
284
285	my $storecfg = PVE::Storage::config();
286	PVE::Storage::volume_snapshot_rollback($storecfg, $drive->{file}, $snapname);
287	}
288
289	sub __snapshot_rollback_vm_stop {
290	my ($class, $vmid) = @_;
291
292	my $storecfg = PVE::Storage::config();
293	PVE::QemuServer::vm_stop($storecfg, $vmid, undef, undef, 5, undef, undef);
294	}
295
296	sub __snapshot_rollback_vm_start {
297	my ($class, $vmid, $vmstate, $forcemachine) = @_;
298
299	my $storecfg = PVE::Storage::config();
300	my $statefile = PVE::Storage::path($storecfg, $vmstate);
301	PVE::QemuServer::vm_start($storecfg, $vmid, $statefile, undef, undef, undef, $forcemachine);
302	}
303
c4a54ed5 FG	304	sub __snapshot_rollback_get_unused {
	305	my ($class, $conf, $snap) = @_;
	306
	307	my $unused = [];
	308
	309	$class->__snapshot_foreach_volume($conf, sub {
	310	my ($vs, $volume) = @_;
	311
	312	return if PVE::QemuServer::drive_is_cdrom($volume);
	313
	314	my $found = 0;
	315	my $volid = $volume->{file};
	316
	317	$class->__snapshot_foreach_volume($snap, sub {
	318	my ($ds, $drive) = @_;
	319
	320	return if $found;
	321	return if PVE::QemuServer::drive_is_cdrom($drive);
	322
	323	$found = 1
	324	if ($drive->{file} && $drive->{file} eq $volid);
	325	});
	326
	327	push @$unused, $volid if !$found;
	328	});
	329
	330	return $unused;
	331	}
	332
b2c9558d FG	333	sub __snapshot_foreach_volume {
	334	my ($class, $conf, $func) = @_;
	335
	336	PVE::QemuServer::foreach_drive($conf, $func);
	337	}
ffda963f FG	338	# END implemented abstract methods from PVE::AbstractConfig
	339
	340	1;