13 use Fcntl
qw(O_RDONLY O_WRONLY O_NOFOLLOW O_DIRECTORY);
14 use Errno
qw(ELOOP ENOTDIR EROFS ECONNREFUSED ENOSYS EEXIST);
17 use PVE
::Exception
qw(raise_perm_exc);
21 use PVE
::JSONSchema
qw(get_standard_option);
34 use PVE
::AccessControl
;
36 use PVE
::Syscall
qw(:fsmount);
38 use PVE
::GuestHelpers
qw(safe_string_ne safe_num_ne safe_boolean_ne);
41 use PVE
::LXC
::Monitor
;
44 use Time
::HiRes qw
(gettimeofday
);
47 require PVE
::Network
::SDN
::Zones
;
51 my $LXC_CONFIG_PATH = '/usr/share/lxc/config';
53 my $nodename = PVE
::INotify
::nodename
();
55 my $cpuinfo= PVE
::ProcFSTools
::read_cpuinfo
();
58 my $vmlist = PVE
::Cluster
::get_vmlist
();
60 return $res if !$vmlist || !$vmlist->{ids
};
61 my $ids = $vmlist->{ids
};
63 foreach my $vmid (keys %$ids) {
64 next if !$vmid; # skip CT0
65 my $d = $ids->{$vmid};
66 next if !$d->{node
} || $d->{node
} ne $nodename;
67 next if !$d->{type
} || $d->{type
} ne 'lxc';
68 $res->{$vmid} = { type
=> 'lxc', vmid
=> $vmid };
73 # container status helpers
75 sub list_active_containers
{
77 my $filename = "/proc/net/unix";
79 # similar test is used by lcxcontainers.c: list_active_containers
82 my $fh = IO
::File-
>new ($filename, "r");
85 while (defined(my $line = <$fh>)) {
86 if ($line =~ m/^[a-f0-9]+:\s+\S+\s+\S+\s+\S+\s+\S+\s+\S+\s+\d+\s+(\S+)$/) {
88 if ($path =~ m!^@/var/lib/lxc/(\d+)/command$!) {
99 # warning: this is slow
103 my $active_hash = list_active_containers
();
105 return 1 if defined($active_hash->{$vmid});
110 sub get_container_disk_usage
{
111 my ($vmid, $pid) = @_;
113 return PVE
::Tools
::df
("/proc/$pid/root/", 1);
116 my $last_proc_vmid_stat;
118 our $vmstatus_return_properties = {
119 vmid
=> get_standard_option
('pve-vmid'),
121 description
=> "LXC Container status.",
123 enum
=> ['stopped', 'running'],
126 description
=> "Maximum memory in bytes.",
132 description
=> "Maximum SWAP memory in bytes.",
138 description
=> "Root disk size in bytes.",
144 description
=> "Container name.",
149 description
=> "Uptime.",
152 renderer
=> 'duration',
155 description
=> "Maximum usable CPUs.",
160 description
=> "The current config lock, if any.",
165 description
=> "The current configured tags, if any.",
174 my $list = $opt_vmid ?
{ $opt_vmid => { type
=> 'lxc', vmid
=> $opt_vmid }} : config_list
();
176 my $active_hash = list_active_containers
();
178 my $cpucount = $cpuinfo->{cpus
} || 1;
180 my $cdtime = gettimeofday
;
182 my $uptime = (PVE
::ProcFSTools
::read_proc_uptime
(1))[0];
183 my $clock_ticks = POSIX
::sysconf
(&POSIX
::_SC_CLK_TCK
);
185 my $unprivileged = {};
187 foreach my $vmid (keys %$list) {
188 my $d = $list->{$vmid};
190 eval { $d->{pid
} = find_lxc_pid
($vmid) if defined($active_hash->{$vmid}); };
191 warn $@ if $@; # ignore errors (consider them stopped)
193 $d->{status
} = $active_hash->{$vmid} ?
'running' : 'stopped';
195 my $cfspath = PVE
::LXC
::Config-
>cfs_config_path($vmid);
196 my $conf = PVE
::Cluster
::cfs_read_file
($cfspath) || {};
198 $unprivileged->{$vmid} = $conf->{unprivileged
};
200 $d->{name
} = $conf->{'hostname'} || "CT$vmid";
201 $d->{name
} =~ s/[\s]//g;
203 $d->{cpus
} = $conf->{cores
} || $conf->{cpulimit
};
204 $d->{cpus
} = $cpucount if !$d->{cpus
};
206 $d->{tags
} = $conf->{tags
} if defined($conf->{tags
});
209 my $res = get_container_disk_usage
($vmid, $d->{pid
});
210 $d->{disk
} = $res->{used
};
211 $d->{maxdisk
} = $res->{total
};
214 # use 4GB by default ??
215 if (my $rootfs = $conf->{rootfs
}) {
216 my $rootinfo = PVE
::LXC
::Config-
>parse_volume('rootfs', $rootfs);
217 $d->{maxdisk
} = $rootinfo->{size
} || (4*1024*1024*1024);
219 $d->{maxdisk
} = 4*1024*1024*1024;
225 $d->{maxmem
} = ($conf->{memory
}||512)*1024*1024;
226 $d->{maxswap
} = ($conf->{swap
}//0)*1024*1024;
237 $d->{template
} = PVE
::LXC
::Config-
>is_template($conf);
238 $d->{lock} = $conf->{lock} if $conf->{lock};
241 foreach my $vmid (keys %$list) {
242 my $d = $list->{$vmid};
245 next if !$pid; # skip stopped CTs
247 my $proc_pid_stat = PVE
::ProcFSTools
::read_proc_pid_stat
($pid);
248 $d->{uptime
} = int(($uptime - $proc_pid_stat->{starttime
}) / $clock_ticks); # the method lxcfs uses
250 my $unpriv = $unprivileged->{$vmid};
252 my $cgroups = PVE
::LXC
::CGroup-
>new($vmid);
254 if (defined(my $mem = $cgroups->get_memory_stat())) {
255 $d->{mem
} = $mem->{mem
};
256 $d->{swap
} = $mem->{swap
};
262 if (defined(my $blkio = $cgroups->get_io_stats())) {
263 $d->{diskread
} = $blkio->{diskread
};
264 $d->{diskwrite
} = $blkio->{diskwrite
};
270 if (defined(my $cpu = $cgroups->get_cpu_stat())) {
271 # Total time (in milliseconds) used up by the cpu.
272 my $used_ms = $cpu->{utime} + $cpu->{stime
};
274 my $old = $last_proc_vmid_stat->{$vmid};
276 $last_proc_vmid_stat->{$vmid} = {
284 my $delta_ms = ($cdtime - $old->{time}) * $cpucount * 1000.0;
285 if ($delta_ms > 1000.0) {
286 my $delta_used_ms = $used_ms - $old->{used
};
287 $d->{cpu
} = (($delta_used_ms / $delta_ms) * $cpucount) / $d->{cpus
};
288 $last_proc_vmid_stat->{$vmid} = {
294 $d->{cpu
} = $old->{cpu
};
301 my $netdev = PVE
::ProcFSTools
::read_proc_net_dev
();
303 foreach my $dev (keys %$netdev) {
304 next if $dev !~ m/^veth([1-9]\d*)i/;
306 my $d = $list->{$vmid};
310 $d->{netout
} += $netdev->{$dev}->{receive
};
311 $d->{netin
} += $netdev->{$dev}->{transmit
};
318 sub find_lxc_console_pids
{
322 PVE
::Tools
::dir_glob_foreach
('/proc', '\d+', sub {
325 my $cmdline = PVE
::Tools
::file_read_firstline
("/proc/$pid/cmdline");
328 my @args = split(/\0/, $cmdline);
330 # search for lxc-console -n <vmid>
331 return if scalar(@args) != 3;
332 return if $args[1] ne '-n';
333 return if $args[2] !~ m/^\d+$/;
334 return if $args[0] !~ m
|^(/usr/bin
/)?lxc-console
$|;
338 push @{$res->{$vmid}}, $pid;
350 $pid = $1 if $line =~ m/^PID:\s+(\d+)$/;
352 PVE
::Tools
::run_command
(['lxc-info', '-n', $vmid, '-p'], outfunc
=> $parser);
354 die "unable to get PID for CT $vmid (not running?)\n" if !$pid;
361 sysopen(my $fd, "/proc/$pid", O_RDONLY
| O_DIRECTORY
)
362 or die "failed to open /proc/$pid pid fd\n";
369 # Find the pid and open:
370 my $pid = find_lxc_pid
($vmid);
371 my $fd = open_pid_fd
($pid);
374 my $pid2 = find_lxc_pid
($vmid);
376 return () if $pid != $pid2;
383 # Find the parent pid via proc and open it:
384 my $stat = PVE
::ProcFSTools
::read_proc_pid_stat
($pid);
385 my $ppid = $stat->{ppid
} // die "failed to get parent pid\n";
387 my $fd = open_pid_fd
($ppid);
390 $stat = PVE
::ProcFSTools
::read_proc_pid_stat
($pid);
391 my $ppid2 = $stat->{ppid
} // die "failed to get parent pid for verification\n";
393 return () if $ppid != $ppid2;
397 # Note: we cannot use Net:IP, because that only allows strict
399 sub parse_ipv4_cidr
{
400 my ($cidr, $noerr) = @_;
402 if ($cidr =~ m!^($IPV4RE)(?:/(\d+))$! && ($2 > 7) && ($2 <= 32)) {
403 return { address
=> $1, netmask
=> $PVE::Network
::ipv4_reverse_mask-
>[$2] };
406 return undef if $noerr;
408 die "unable to parse ipv4 address/mask\n";
411 # Deprecated. Use `PVE::CGroup::get_cgroup_controllers()` instead.
412 sub get_cgroup_subsystems
{
413 PVE
::CGroup
::get_v1_controllers
();
416 # With seccomp trap to userspace we now have the ability to optionally forward
417 # certain syscalls to the "host" to handle (via our pve-lxc-syscalld daemon).
419 # This means that there are cases where we need to create an extra seccomp
420 # profile for the container to load.
422 # This returns a configuration snippet added to the raw lxc config.
423 sub make_seccomp_config
{
424 my ($conf, $vmid, $conf_dir, $unprivileged, $features) = @_;
425 # User-configured profile has precedence, note that the user's entry would
426 # be written 'after' this line anyway...
427 if (PVE
::LXC
::Config-
>has_lxc_entry($conf, 'lxc.seccomp.profile')) {
428 # Warn the user if this conflicts with a feature:
429 my $warn = join(', ', grep { $features->{$_} } qw(keyctl mknod));
430 warn "explicitly configured lxc.seccomp.profile overrides the following settings: $warn\n"
431 if length($warn) > 0;
435 # Privileged containers keep using the default (which is already part of
436 # the files included via lxc.include, so we don't need to write it out,
437 # that way it stays admin-configurable via /usr/share/lxc/config/... as
439 return '' if !$unprivileged;
442 keyctl
=> ['errno 38'],
447 # Unprivileged containers will get keyctl() disabled by default as a
448 # workaround for systemd-networkd behavior. But we have an option to
449 # explicitly enable it:
450 if ($features->{keyctl
}) {
451 delete $rules->{keyctl
};
454 # By default, unprivileged containers cannot use `mknod` at all.
455 # Since lxc 3.2, we can use seccomp's trap to userspace feature for this,
456 # but for now this is experimental, so it has to be enabled via a feature
458 # Note that we only handle block and char devices (like lxd), the rest we
459 # leave up to the kernel. We may in the future remove this if seccomp gets
460 # a way to tell the kernel to "continue" a syscall.
461 if ($features->{mknod
}) {
462 my ($ok, $kernel) = PVE
::ProcFSTools
::check_kernel_release
(5, 3);
464 die "'mknod' feature requested, but kernel too old (found $kernel, required >= 5.3)\n";
467 $raw_conf .= "lxc.seccomp.notify.proxy = unix:/run/pve/lxc-syscalld.sock\n";
468 $raw_conf .= "lxc.seccomp.notify.cookie = $vmid\n";
471 # condition: (mode & S_IFMT) == S_IFCHR
472 'notify [1,8192,SCMP_CMP_MASKED_EQ,61440]',
473 # condition: (mode & S_IFMT) == S_IFBLK
474 'notify [1,24576,SCMP_CMP_MASKED_EQ,61440]',
476 $rules->{mknodat
} = [
477 # condition: (mode & S_IFMT) == S_IFCHR
478 'notify [2,8192,SCMP_CMP_MASKED_EQ,61440]',
479 # condition: (mode & S_IFMT) == S_IFBLK
480 'notify [2,24576,SCMP_CMP_MASKED_EQ,61440]',
484 # Now build the custom seccomp rule text...
485 my $extra_rules = join("\n", map {
487 map { "$syscall $_" } $rules->{$syscall}->@*
488 } sort keys %$rules) . "\n";
490 return $raw_conf if $extra_rules eq "\n";
492 # We still have the "most common" config readily available, so don't write
494 if ($raw_conf eq '' && $extra_rules eq "keyctl errno 38\n") {
495 # we have no extra $raw_conf and use the same we had in pve 6.1:
496 return "lxc.seccomp.profile = $LXC_CONFIG_PATH/pve-userns.seccomp\n";
499 # Write the rule file to the container's config path:
500 my $rule_file = "$conf_dir/rules.seccomp";
501 my $rule_data = file_get_contents
("$LXC_CONFIG_PATH/common.seccomp")
503 file_set_contents
($rule_file, $rule_data);
504 $raw_conf .= "lxc.seccomp.profile = $rule_file\n";
509 # Since lxc-3.0.2 we can have lxc generate a profile for the container
510 # automatically. The default should be equivalent to the old
511 # `lxc-container-default-cgns` profile.
513 # Additionally this also added `lxc.apparmor.raw` which can be used to inject
514 # additional lines into the profile. We can use that to allow mounting specific
516 sub make_apparmor_config
{
517 my ($conf, $unprivileged, $features) = @_;
519 # user-configured profile has precedence, but first we go through our own
520 # code to figure out whether we should warn the user:
522 my $raw = "lxc.apparmor.profile = generated\n";
525 if ($features->{fuse
}) {
526 # For the informational warning:
527 push @profile_uses, 'features:fuse';
530 # There's lxc.apparmor.allow_nesting now, which will add the necessary
531 # apparmor lines, create an apparmor namespace for the container, but also
532 # adds proc and sysfs mounts to /dev/.lxc/{proc,sys}. These do not have
533 # lxcfs mounted over them, because that would prevent the container from
534 # mounting new instances of them for nested containers.
535 if ($features->{nesting
}) {
536 push @profile_uses, 'features:nesting';
537 $raw .= "lxc.apparmor.allow_nesting = 1\n"
539 # In the default profile in /etc/apparmor.d we patch this in because
540 # otherwise a container can for example run `chown` on /sys, breaking
541 # access to it for non-CAP_DAC_OVERRIDE tools on the host:
542 $raw .= "lxc.apparmor.raw = deny mount -> /proc/,\n";
543 $raw .= "lxc.apparmor.raw = deny mount -> /sys/,\n";
544 # Preferably we could use the 'remount' flag but this does not sit well
545 # with apparmor_parser currently:
546 # mount options=(rw, nosuid, nodev, noexec, remount) -> /sys/,
549 if (my $mount = $features->{mount
}) {
550 push @profile_uses, 'features:mount';
551 foreach my $fs (PVE
::Tools
::split_list
($mount)) {
552 $raw .= "lxc.apparmor.raw = mount fstype=$fs,\n";
558 if (PVE
::LXC
::Config-
>has_lxc_entry($conf, 'lxc.apparmor.profile')) {
559 if (length(my $used = join(', ', @profile_uses))) {
560 warn "explicitly configured lxc.apparmor.profile overrides the following settings: $used\n";
568 sub update_lxc_config
{
569 my ($vmid, $conf) = @_;
571 my $dir = "/var/lib/lxc/$vmid";
573 if ($conf->{template
}) {
575 unlink "$dir/config";
580 my ($lxc_major, $lxc_minor) = get_lxc_version
();
584 if ($lxc_major >= 4) {
585 # Explicitly don't use relative directories, which is the default, but
586 # note that we do this mostly because they are only applied for *some*
587 # cgroups. Our pve-container@.service now starts lxc-start with `-F`,
588 # so we also don't need to worry about the new monitor cgroup to
590 $raw .= "lxc.cgroup.relative = 0\n";
592 # To make things easier, let's keep our previous cgroup layout and
593 # simply move the monitor outside:
594 $raw .= "lxc.cgroup.dir.monitor = lxc.monitor/$vmid\n";
595 # cgroup namespace separation for stronger limits:
596 $raw .= "lxc.cgroup.dir.container = lxc/$vmid\n";
597 $raw .= "lxc.cgroup.dir.container.inner = ns\n";
600 die "missing 'arch' - internal error" if !$conf->{arch
};
601 $raw .= "lxc.arch = $conf->{arch}\n";
603 my $custom_idmap = PVE
::LXC
::Config-
>has_lxc_entry($conf, 'lxc.idmap');
604 my $unprivileged = $conf->{unprivileged
} || $custom_idmap;
606 my $ostype = $conf->{ostype
} || die "missing 'ostype' - internal error";
608 my $cfgpath = '/usr/share/lxc/config';
609 my $inc = "$cfgpath/$ostype.common.conf";
610 $inc ="$cfgpath/common.conf" if !-f
$inc;
611 $raw .= "lxc.include = $inc\n";
613 $inc = "$cfgpath/$ostype.userns.conf";
614 $inc = "$cfgpath/userns.conf" if !-f
$inc;
615 $raw .= "lxc.include = $inc\n";
618 my $features = PVE
::LXC
::Config-
>parse_features($conf->{features
});
620 $raw .= make_seccomp_config
($conf, $vmid, $dir, $unprivileged, $features);
621 $raw .= make_apparmor_config
($conf, $unprivileged, $features);
622 if ($features->{fuse
}) {
623 $raw .= "lxc.apparmor.raw = mount fstype=fuse,\n";
624 $raw .= "lxc.mount.entry = /dev/fuse dev/fuse none bind,create=file 0 0\n";
627 if ($unprivileged && !$features->{force_rw_sys
}) {
628 # unpriv. CT default to sys:rw, but that doesn't always plays well with
629 # systemd, e.g., systemd-networkd https://systemd.io/CONTAINER_INTERFACE/
630 $raw .= "lxc.mount.auto = sys:mixed\n";
633 # WARNING: DO NOT REMOVE this without making sure that loop device nodes
634 # cannot be exposed to the container with r/w access (cgroup perms).
635 # When this is enabled mounts will still remain in the monitor's namespace
636 # after the container unmounted them and thus will not detach from their
637 # files while the container is running!
638 $raw .= "lxc.monitor.unshare = 1\n";
640 my $cgv1 = get_cgroup_subsystems
();
642 # Should we read them from /etc/subuid?
643 if ($unprivileged && !$custom_idmap) {
644 $raw .= "lxc.idmap = u 0 100000 65536\n";
645 $raw .= "lxc.idmap = g 0 100000 65536\n";
648 if (!PVE
::LXC
::Config-
>has_dev_console($conf)) {
649 $raw .= "lxc.console.path = none\n";
650 $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n" if $cgv1->{devices
};
653 my $ttycount = PVE
::LXC
::Config-
>get_tty_count($conf);
654 $raw .= "lxc.tty.max = $ttycount\n";
656 # some init scripts expect a linux terminal (turnkey).
657 $raw .= "lxc.environment = TERM=linux\n";
659 my $utsname = $conf->{hostname
} || "CT$vmid";
660 $raw .= "lxc.uts.name = $utsname\n";
662 if ($cgv1->{memory
}) {
663 my $memory = $conf->{memory
} || 512;
664 my $swap = $conf->{swap
} // 0;
666 my $lxcmem = int($memory*1024*1024);
667 $raw .= "lxc.cgroup.memory.limit_in_bytes = $lxcmem\n";
669 my $lxcswap = int(($memory + $swap)*1024*1024);
670 $raw .= "lxc.cgroup.memory.memsw.limit_in_bytes = $lxcswap\n";
674 if (my $cpulimit = $conf->{cpulimit
}) {
675 $raw .= "lxc.cgroup.cpu.cfs_period_us = 100000\n";
676 my $value = int(100000*$cpulimit);
677 $raw .= "lxc.cgroup.cpu.cfs_quota_us = $value\n";
680 my $shares = $conf->{cpuunits
} || 1024;
681 $raw .= "lxc.cgroup.cpu.shares = $shares\n";
684 die "missing 'rootfs' configuration\n"
685 if !defined($conf->{rootfs
});
687 my $mountpoint = PVE
::LXC
::Config-
>parse_volume('rootfs', $conf->{rootfs
});
689 $raw .= "lxc.rootfs.path = $dir/rootfs\n";
691 foreach my $k (sort keys %$conf) {
692 next if $k !~ m/^net(\d+)$/;
694 my $d = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$k});
695 $raw .= "lxc.net.$ind.type = veth\n";
696 $raw .= "lxc.net.$ind.veth.pair = veth${vmid}i${ind}\n";
697 $raw .= "lxc.net.$ind.hwaddr = $d->{hwaddr}\n" if defined($d->{hwaddr
});
698 $raw .= "lxc.net.$ind.name = $d->{name}\n" if defined($d->{name
});
699 $raw .= "lxc.net.$ind.mtu = $d->{mtu}\n" if defined($d->{mtu
});
701 # Starting with lxc 4.0, we do not patch lxc to execute our up-scripts.
702 if ($lxc_major >= 4) {
703 $raw .= "lxc.net.$ind.script.up = /usr/share/lxc/lxcnetaddbr\n";
708 if (my $lxcconf = $conf->{lxc
}) {
709 foreach my $entry (@$lxcconf) {
710 my ($k, $v) = @$entry;
711 $had_cpuset = 1 if $k eq 'lxc.cgroup.cpuset.cpus' || $k eq 'lxc.cgroup2.cpuset.cpus';
717 my ($cpuset_cgroup, $cpuset_version) = eval { PVE
::CGroup
::cpuset_controller_path
() };
718 if (defined($cpuset_cgroup)) {
719 $cpuset = eval { PVE
::CpuSet-
>new_from_path("$cpuset_cgroup/lxc", 1) }
720 || PVE
::CpuSet-
>new_from_path($cpuset_cgroup, 1);
722 my $cores = $conf->{cores
};
723 if (!$had_cpuset && $cores && $cpuset) {
724 my @members = $cpuset->members();
725 while (scalar(@members) > $cores) {
726 my $randidx = int(rand(scalar(@members)));
727 $cpuset->delete($members[$randidx]);
728 splice(@members, $randidx, 1); # keep track of the changes
730 my $ver = $cpuset_version == 1 ?
'' : '2';
731 $raw .= "lxc.cgroup$ver.cpuset.cpus = ".$cpuset->short_string()."\n";
734 File
::Path
::mkpath
("$dir/rootfs");
736 PVE
::Tools
::file_set_contents
("$dir/config", $raw);
739 # verify and cleanup nameserver list (replace \0 with ' ')
740 sub verify_nameserver_list
{
741 my ($nameserver_list) = @_;
744 foreach my $server (PVE
::Tools
::split_list
($nameserver_list)) {
745 PVE
::LXC
::Config
::verify_ip_with_ll_iface
($server);
749 return join(' ', @list);
752 sub verify_searchdomain_list
{
753 my ($searchdomain_list) = @_;
756 foreach my $server (PVE
::Tools
::split_list
($searchdomain_list)) {
757 # todo: should we add checks for valid dns domains?
761 return join(' ', @list);
764 sub get_console_command
{
765 my ($vmid, $conf, $escapechar) = @_;
767 # '-1' as $escapechar disables keyboard escape sequence
768 # any other passed char (a-z) will result in <Ctrl+$escapechar q>
770 my $cmode = PVE
::LXC
::Config-
>get_cmode($conf);
773 if ($cmode eq 'console') {
774 push @$cmd, 'lxc-console', '-n', $vmid, '-t', 0;
775 push @$cmd, '-e', $escapechar if $escapechar;
776 } elsif ($cmode eq 'tty') {
777 push @$cmd, 'lxc-console', '-n', $vmid;
778 push @$cmd, '-e', $escapechar if $escapechar;
779 } elsif ($cmode eq 'shell') {
780 push @$cmd, 'lxc-attach', '--clear-env', '-n', $vmid;
782 die "internal error";
788 sub get_primary_ips
{
791 # return data from net0
793 return undef if !defined($conf->{net0
});
794 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{net0
});
796 my $ipv4 = $net->{ip
};
798 if ($ipv4 =~ /^(dhcp|manual)$/) {
804 my $ipv6 = $net->{ip6
};
806 if ($ipv6 =~ /^(auto|dhcp|manual)$/) {
813 return ($ipv4, $ipv6);
816 sub delete_mountpoint_volume
{
817 my ($storage_cfg, $vmid, $volume) = @_;
819 return if PVE
::LXC
::Config-
>classify_mountpoint($volume) ne 'volume';
821 my ($vtype, $name, $owner) = PVE
::Storage
::parse_volname
($storage_cfg, $volume);
823 if ($vmid == $owner) {
824 PVE
::Storage
::vdisk_free
($storage_cfg, $volume);
826 warn "ignore deletion of '$volume', CT $vmid isn't the owner!\n";
830 sub destroy_lxc_container
{
831 my ($storage_cfg, $vmid, $conf, $replacement_conf, $purge_unreferenced) = @_;
833 PVE
::LXC
::Config-
>foreach_volume_full($conf, {include_unused
=> 1}, sub {
834 my ($ms, $mountpoint) = @_;
835 delete_mountpoint_volume
($storage_cfg, $vmid, $mountpoint->{volume
});
838 if ($purge_unreferenced) { # also remove unreferenced disk
839 my $vmdisks = PVE
::Storage
::vdisk_list
($storage_cfg, undef, $vmid, undef, 'rootdir');
840 PVE
::Storage
::foreach_volid
($vmdisks, sub {
841 my ($volid, $sid, $volname, $d) = @_;
842 eval { PVE
::Storage
::vdisk_free
($storage_cfg, $volid) };
847 rmdir "/var/lib/lxc/$vmid/rootfs";
848 unlink "/var/lib/lxc/$vmid/config";
849 rmdir "/var/lib/lxc/$vmid";
850 if (defined $replacement_conf) {
851 PVE
::LXC
::Config-
>write_config($vmid, $replacement_conf);
853 PVE
::LXC
::Config-
>destroy_config($vmid);
857 sub vm_stop_cleanup
{
858 my ($storage_cfg, $vmid, $conf, $keepActive) = @_;
860 return if $keepActive;
863 my $vollist = PVE
::LXC
::Config-
>get_vm_volumes($conf);
864 PVE
::Storage
::deactivate_volumes
($storage_cfg, $vollist);
866 warn $@ if $@; # avoid errors - just warn
870 my ($vmid, $conf, $opt, $newnet, $netid, $rootdir) = @_;
872 if ($newnet->{type
} ne 'veth') {
873 # for when there are physical interfaces
874 die "cannot update interface of type $newnet->{type}";
877 my $veth = "veth${vmid}i${netid}";
878 my $eth = $newnet->{name
};
880 if (my $oldnetcfg = $conf->{$opt}) {
881 my $oldnet = PVE
::LXC
::Config-
>parse_lxc_network($oldnetcfg);
883 if (safe_string_ne
($oldnet->{hwaddr
}, $newnet->{hwaddr
}) ||
884 safe_string_ne
($oldnet->{name
}, $newnet->{name
})) {
886 PVE
::Network
::veth_delete
($veth);
887 delete $conf->{$opt};
888 PVE
::LXC
::Config-
>write_config($vmid, $conf);
890 hotplug_net
($vmid, $conf, $opt, $newnet, $netid);
893 if (safe_string_ne
($oldnet->{bridge
}, $newnet->{bridge
}) ||
894 safe_num_ne
($oldnet->{tag
}, $newnet->{tag
}) ||
895 safe_num_ne
($oldnet->{firewall
}, $newnet->{firewall
})) {
897 if ($oldnet->{bridge
}) {
898 PVE
::Network
::tap_unplug
($veth);
899 foreach (qw(bridge tag firewall)) {
900 delete $oldnet->{$_};
902 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($oldnet);
903 PVE
::LXC
::Config-
>write_config($vmid, $conf);
907 PVE
::Network
::SDN
::Zones
::tap_plug
($veth, $newnet->{bridge
}, $newnet->{tag
}, $newnet->{firewall
}, $newnet->{trunks
}, $newnet->{rate
});
909 PVE
::Network
::tap_plug
($veth, $newnet->{bridge
}, $newnet->{tag
}, $newnet->{firewall
}, $newnet->{trunks
}, $newnet->{rate
});
912 # This includes the rate:
913 foreach (qw(bridge tag firewall rate)) {
914 $oldnet->{$_} = $newnet->{$_} if $newnet->{$_};
916 } elsif (safe_string_ne
($oldnet->{rate
}, $newnet->{rate
})) {
917 # Rate can be applied on its own but any change above needs to
918 # include the rate in tap_plug since OVS resets everything.
919 PVE
::Network
::tap_rate_limit
($veth, $newnet->{rate
});
920 $oldnet->{rate
} = $newnet->{rate
}
922 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($oldnet);
923 PVE
::LXC
::Config-
>write_config($vmid, $conf);
926 hotplug_net
($vmid, $conf, $opt, $newnet, $netid);
929 update_ipconfig
($vmid, $conf, $opt, $eth, $newnet, $rootdir);
933 my ($vmid, $conf, $opt, $newnet, $netid) = @_;
935 my $veth = "veth${vmid}i${netid}";
936 my $vethpeer = $veth . "p";
937 my $eth = $newnet->{name
};
940 PVE
::Network
::SDN
::Zones
::veth_create
($veth, $vethpeer, $newnet->{bridge
}, $newnet->{hwaddr
});
941 PVE
::Network
::SDN
::Zones
::tap_plug
($veth, $newnet->{bridge
}, $newnet->{tag
}, $newnet->{firewall
}, $newnet->{trunks
}, $newnet->{rate
});
943 PVE
::Network
::veth_create
($veth, $vethpeer, $newnet->{bridge
}, $newnet->{hwaddr
});
944 PVE
::Network
::tap_plug
($veth, $newnet->{bridge
}, $newnet->{tag
}, $newnet->{firewall
}, $newnet->{trunks
}, $newnet->{rate
});
947 # attach peer in container
948 my $cmd = ['lxc-device', '-n', $vmid, 'add', $vethpeer, "$eth" ];
949 PVE
::Tools
::run_command
($cmd);
951 # link up peer in container
952 $cmd = ['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', '/sbin/ip', 'link', 'set', $eth ,'up' ];
953 PVE
::Tools
::run_command
($cmd);
955 my $done = { type
=> 'veth' };
956 foreach (qw(bridge tag firewall hwaddr name)) {
957 $done->{$_} = $newnet->{$_} if $newnet->{$_};
959 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($done);
961 PVE
::LXC
::Config-
>write_config($vmid, $conf);
964 sub update_ipconfig
{
965 my ($vmid, $conf, $opt, $eth, $newnet, $rootdir) = @_;
967 my $lxc_setup = PVE
::LXC
::Setup-
>new($conf, $rootdir);
969 my $optdata = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$opt});
974 PVE
::Tools
::run_command
(['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', @_], %$cmdargs);
976 my $ipcmd = sub { &$nscmd({}, '/sbin/ip', @_) };
978 my $change_ip_config = sub {
979 my ($ipversion) = @_;
981 my $family_opt = "-$ipversion";
982 my $suffix = $ipversion == 4 ?
'' : $ipversion;
986 my $newip = $newnet->{$ip};
987 my $newgw = $newnet->{$gw};
988 my $oldip = $optdata->{$ip};
989 my $oldgw = $optdata->{$gw};
991 my $change_ip = safe_string_ne
($oldip, $newip);
992 my $change_gw = safe_string_ne
($oldgw, $newgw);
994 return if !$change_ip && !$change_gw;
996 # step 1: add new IP, if this fails we cancel
997 my $is_real_ip = ($newip && $newip !~ /^(?:auto|dhcp|manual)$/);
998 if ($change_ip && $is_real_ip) {
999 eval { &$ipcmd($family_opt, 'addr', 'add', $newip, 'dev', $eth); };
1006 # step 2: replace gateway
1007 # If this fails we delete the added IP and cancel.
1008 # If it succeeds we save the config and delete the old IP, ignoring
1009 # errors. The config is then saved.
1010 # Note: 'ip route replace' can add
1014 if ($is_real_ip && !PVE
::Network
::is_ip_in_cidr
($newgw, $newip, $ipversion)) {
1015 &$ipcmd($family_opt, 'route', 'add', $newgw, 'dev', $eth);
1017 &$ipcmd($family_opt, 'route', 'replace', 'default', 'via', $newgw);
1021 # the route was not replaced, the old IP is still available
1022 # rollback (delete new IP) and cancel
1024 eval { &$ipcmd($family_opt, 'addr', 'del', $newip, 'dev', $eth); };
1025 warn $@ if $@; # no need to die here
1030 eval { &$ipcmd($family_opt, 'route', 'del', 'default'); };
1031 # if the route was not deleted, the guest might have deleted it manually
1035 if ($oldgw && $oldip && !PVE
::Network
::is_ip_in_cidr
($oldgw, $oldip)) {
1036 eval { &$ipcmd($family_opt, 'route', 'del', $oldgw, 'dev', $eth); };
1037 # warn if the route was deleted manually
1042 # from this point on we save the configuration
1043 # step 3: delete old IP ignoring errors
1044 if ($change_ip && $oldip && $oldip !~ /^(?:auto|dhcp)$/) {
1045 # We need to enable promote_secondaries, otherwise our newly added
1046 # address will be removed along with the old one.
1049 if ($ipversion == 4) {
1050 &$nscmd({ outfunc
=> sub { $promote = int(shift) } },
1051 'cat', "/proc/sys/net/ipv4/conf/$eth/promote_secondaries");
1052 &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=1");
1054 &$ipcmd($family_opt, 'addr', 'del', $oldip, 'dev', $eth);
1056 warn $@ if $@; # no need to die here
1058 if ($ipversion == 4) {
1059 &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=$promote");
1063 foreach my $property ($ip, $gw) {
1064 if ($newnet->{$property}) {
1065 $optdata->{$property} = $newnet->{$property};
1067 delete $optdata->{$property};
1070 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($optdata);
1071 PVE
::LXC
::Config-
>write_config($vmid, $conf);
1072 $lxc_setup->setup_network($conf);
1075 &$change_ip_config(4);
1076 &$change_ip_config(6);
1080 my $open_namespace = sub {
1081 my ($vmid, $pid, $kind) = @_;
1082 sysopen my $fd, "/proc/$pid/ns/$kind", O_RDONLY
1083 or die "failed to open $kind namespace of container $vmid: $!\n";
1087 my $enter_namespace = sub {
1088 my ($vmid, $pid, $kind, $type) = @_;
1089 my $fd = $open_namespace->($vmid, $pid, $kind);
1090 PVE
::Tools
::setns
(fileno($fd), $type)
1091 or die "failed to enter $kind namespace of container $vmid: $!\n";
1095 my $get_container_namespace = sub {
1096 my ($vmid, $pid, $kind) = @_;
1099 if (!defined($pid)) {
1100 # Pin the pid while we're grabbing its stuff from /proc
1101 ($pid, $pidfd) = open_lxc_pid
($vmid)
1102 or die "failed to open pidfd of container $vmid\'s init process\n";
1105 return $open_namespace->($vmid, $pid, $kind);
1108 my $do_syncfs = sub {
1109 my ($vmid, $pid, $socket) = @_;
1111 &$enter_namespace($vmid, $pid, 'mnt', PVE
::Tools
::CLONE_NEWNS
);
1113 # Tell the parent process to start reading our /proc/mounts
1114 print {$socket} "go\n";
1117 # Receive /proc/self/mounts
1118 my $mountdata = do { local $/ = undef; <$socket> };
1134 # Now sync all mountpoints...
1135 my $mounts = PVE
::ProcFSTools
::parse_mounts
($mountdata);
1136 foreach my $mp (@$mounts) {
1137 my ($what, $dir, $fs) = @$mp;
1138 next if $nosyncfs{$fs};
1139 eval { PVE
::Tools
::sync_mountpoint
($dir); };
1144 sub sync_container_namespace
{
1146 my $pid = find_lxc_pid
($vmid);
1148 # SOCK_DGRAM is nicer for barriers but cannot be slurped
1149 socketpair my $pfd, my $cfd, AF_UNIX
, SOCK_STREAM
, PF_UNSPEC
1150 or die "failed to create socketpair: $!\n";
1153 die "fork failed: $!\n" if !defined($child);
1158 &$do_syncfs($vmid, $pid, $cfd);
1168 die "failed to enter container namespace\n" if $go ne "go\n";
1170 open my $mounts, '<', "/proc/$child/mounts"
1171 or die "failed to open container's /proc/mounts: $!\n";
1172 my $mountdata = do { local $/ = undef; <$mounts> };
1174 print {$pfd} $mountdata;
1177 while (waitpid($child, 0) != $child) {}
1178 die "failed to sync container namespace\n" if $? != 0;
1181 sub template_create
{
1182 my ($vmid, $conf) = @_;
1184 my $storecfg = PVE
::Storage
::config
();
1186 PVE
::LXC
::Config-
>foreach_volume($conf, sub {
1187 my ($ms, $mountpoint) = @_;
1189 my $volid = $mountpoint->{volume
};
1191 die "Template feature is not available for '$volid'\n"
1192 if !PVE
::Storage
::volume_has_feature
($storecfg, 'template', $volid);
1195 PVE
::LXC
::Config-
>foreach_volume($conf, sub {
1196 my ($ms, $mountpoint) = @_;
1198 my $volid = $mountpoint->{volume
};
1200 PVE
::Storage
::activate_volumes
($storecfg, [$volid]);
1202 my $template_volid = PVE
::Storage
::vdisk_create_base
($storecfg, $volid);
1203 $mountpoint->{volume
} = $template_volid;
1204 $conf->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq "rootfs");
1207 PVE
::LXC
::Config-
>write_config($vmid, $conf);
1210 sub check_ct_modify_config_perm
{
1211 my ($rpcenv, $authuser, $vmid, $pool, $newconf, $delete) = @_;
1213 return 1 if $authuser eq 'root@pam';
1216 my ($opt, $delete) = @_;
1217 if ($opt eq 'cores' || $opt eq 'cpuunits' || $opt eq 'cpulimit') {
1218 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.CPU']);
1219 } elsif ($opt eq 'rootfs' || $opt =~ /^mp\d+$/) {
1220 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk']);
1222 my $data = PVE
::LXC
::Config-
>parse_volume($opt, $newconf->{$opt});
1223 raise_perm_exc
("mount point type $data->{type} is only allowed for root\@pam")
1224 if $data->{type
} ne 'volume';
1225 } elsif ($opt eq 'memory' || $opt eq 'swap') {
1226 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Memory']);
1227 } elsif ($opt =~ m/^net\d+$/ || $opt eq 'nameserver' ||
1228 $opt eq 'searchdomain' || $opt eq 'hostname') {
1229 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Network']);
1230 } elsif ($opt eq 'features') {
1231 # For now this is restricted to root@pam
1232 raise_perm_exc
("changing feature flags is only allowed for root\@pam");
1233 } elsif ($opt eq 'hookscript') {
1234 # For now this is restricted to root@pam
1235 raise_perm_exc
("changing the hookscript is only allowed for root\@pam");
1237 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Options']);
1241 foreach my $opt (keys %$newconf) {
1244 foreach my $opt (@$delete) {
1252 my ($vmid, $storage_cfg, $conf, $noerr) = @_;
1254 my $rootdir = "/var/lib/lxc/$vmid/rootfs";
1255 my $volid_list = PVE
::LXC
::Config-
>get_vm_volumes($conf);
1259 PVE
::LXC
::Config-
>foreach_volume_full($conf, {'reverse' => 1}, sub {
1260 my ($ms, $mountpoint) = @_;
1262 my $volid = $mountpoint->{volume
};
1263 my $mount = $mountpoint->{mp
};
1265 return if !$volid || !$mount;
1267 my $mount_path = "$rootdir/$mount";
1268 $mount_path =~ s!/+!/!g;
1270 return if !PVE
::ProcFSTools
::is_mounted
($mount_path);
1273 PVE
::Tools
::run_command
(['umount', '-d', $mount_path]);
1285 return $res; # tell caller if (some) umounts failed for the noerr case
1289 my ($vmid, $storage_cfg, $conf, $ignore_ro) = @_;
1291 my $rootdir = "/var/lib/lxc/$vmid/rootfs";
1292 File
::Path
::make_path
($rootdir);
1294 my $volid_list = PVE
::LXC
::Config-
>get_vm_volumes($conf);
1295 PVE
::Storage
::activate_volumes
($storage_cfg, $volid_list);
1297 my (undef, $rootuid, $rootgid) = parse_id_maps
($conf);
1300 PVE
::LXC
::Config-
>foreach_volume($conf, sub {
1301 my ($ms, $mountpoint) = @_;
1303 $mountpoint->{ro
} = 0 if $ignore_ro;
1305 mountpoint_mount
($mountpoint, $rootdir, $storage_cfg, undef, $rootuid, $rootgid);
1309 warn "mounting container failed\n";
1310 umount_all
($vmid, $storage_cfg, $conf, 1);
1318 sub mountpoint_mount_path
{
1319 my ($mountpoint, $storage_cfg, $snapname) = @_;
1321 return mountpoint_mount
($mountpoint, undef, $storage_cfg, $snapname);
1329 if ($line =~ m
@^(/dev/loop\d
+):@) {
1333 my $cmd = ['losetup', '--associated', $path];
1334 PVE
::Tools
::run_command
($cmd, outfunc
=> $parser);
1338 # Run a function with a file attached to a loop device.
1339 # The loop device is always detached afterwards (or set to autoclear).
1340 # Returns the loop device.
1341 sub run_with_loopdev
{
1342 my ($func, $file, $readonly) = @_;
1343 my $device = query_loopdev
($file);
1344 # Try to reuse an existing device
1346 # We assume that whoever setup the loop device is responsible for
1354 if ($line =~ m
@^(/dev/loop\d
+)$@) {
1364 push @$losetup_cmd, '-r' if $readonly;
1365 PVE
::Tools
::run_command
($losetup_cmd, outfunc
=> $parser);
1366 die "failed to setup loop device for $file\n" if !$device;
1367 eval { &$func($device); };
1369 PVE
::Tools
::run_command
(['losetup', '-d', $device]);
1374 # In scalar mode: returns a file handle to the deepest directory node.
1375 # In list context: returns a list of:
1376 # * the deepest directory node
1377 # * the 2nd deepest directory (parent of the above)
1378 # * directory name of the last directory
1379 # So that the path $2/$3 should lead to $1 afterwards.
1380 sub walk_tree_nofollow
($$$;$$) {
1381 my ($start, $subdir, $mkdir, $rootuid, $rootgid) = @_;
1383 sysopen(my $fd, $start, O_PATH
| O_DIRECTORY
)
1384 or die "failed to open start directory $start: $!\n";
1386 return walk_tree_nofollow_fd
($start, $fd, $subdir, $mkdir, $rootuid, $rootgid);
1390 sub walk_tree_nofollow_fd
($$$$;$$) {
1391 my ($start_dirname, $start_fd, $subdir, $mkdir, $rootuid, $rootgid) = @_;
1393 # splitdir() returns '' for empty components including the leading /
1394 my @comps = grep { length($_)>0 } File
::Spec-
>splitdir($subdir);
1397 my $dir = $start_dirname;
1398 my $last_component = undef;
1400 foreach my $component (@comps) {
1401 $dir .= "/$component";
1402 my $next = PVE
::Tools
::openat
(fileno($fd), $component, O_NOFOLLOW
| O_DIRECTORY
);
1405 # failed, check for symlinks and try to create the path
1406 die "symlink encountered at: $dir\n" if $! == ELOOP
|| $! == ENOTDIR
;
1407 die "cannot open directory $dir: $!\n" if !$mkdir;
1409 # We don't check for errors on mkdirat() here and just try to
1410 # openat() again, since at least one error (EEXIST) is an
1411 # expected possibility if multiple containers start
1412 # simultaneously. If someone else injects a symlink now then
1413 # the subsequent openat() will fail due to O_NOFOLLOW anyway.
1414 PVE
::Tools
::mkdirat
(fileno($fd), $component, 0755);
1416 $next = PVE
::Tools
::openat
(fileno($fd), $component, O_NOFOLLOW
| O_DIRECTORY
);
1417 die "failed to create path: $dir: $!\n" if !$next;
1419 PVE
::Tools
::fchownat
(fileno($next), '', $rootuid, $rootgid, PVE
::Tools
::AT_EMPTY_PATH
)
1420 if defined($rootuid) && defined($rootgid);
1423 close $second if defined($last_component) && $second != $start_fd;
1424 $last_component = $component;
1429 return ($fd, defined($last_component) && $second, $last_component) if wantarray;
1430 close $second if defined($last_component) && $second != $start_fd;
1434 # To guard against symlink attack races against other currently running
1435 # containers with shared recursive bind mount hierarchies we prepare a
1436 # directory handle for the directory we're mounting over to verify the
1437 # mountpoint afterwards.
1438 sub __bindmount_prepare
{
1439 my ($hostroot, $dir) = @_;
1440 my $srcdh = walk_tree_nofollow
($hostroot, $dir, 0);
1444 # Assuming we mount to rootfs/a/b/c, verify with the directory handle to 'b'
1445 # ($parentfd) that 'b/c' (openat($parentfd, 'c')) really leads to the directory
1446 # we intended to bind mount.
1447 sub __bindmount_verify
{
1448 my ($srcdh, $parentfd, $last_dir, $ro) = @_;
1451 # Open the mount point path coming from the parent directory since the
1452 # filehandle we would have gotten as first result of walk_tree_nofollow
1453 # earlier is still a handle to the underlying directory instead of the
1455 $destdh = PVE
::Tools
::openat
(fileno($parentfd), $last_dir, PVE
::Tools
::O_PATH
| O_NOFOLLOW
| O_DIRECTORY
);
1456 die "failed to open mount point: $!\n" if !$destdh;
1459 # no separate function because 99% of the time it's the wrong thing to use.
1460 if (syscall(PVE
::Syscall
::faccessat
, fileno($destdh), $dot, &POSIX
::W_OK
, 0) != -1) {
1461 die "failed to mark bind mount read only\n";
1463 die "read-only check failed: $!\n" if $! != EROFS
;
1466 # For the rootfs we don't have a parentfd so we open the path directly.
1467 # Note that this means bindmounting any prefix of the host's
1468 # /var/lib/lxc/$vmid path into another container is considered a grave
1470 sysopen $destdh, $last_dir, O_PATH
| O_DIRECTORY
;
1471 die "failed to open mount point: $!\n" if !$destdh;
1474 my ($srcdev, $srcinode) = stat($srcdh);
1475 my ($dstdev, $dstinode) = stat($destdh);
1479 return ($srcdev == $dstdev && $srcinode == $dstinode);
1482 # Perform the actual bind mounting:
1483 sub __bindmount_do
{
1484 my ($dir, $dest, $ro, @extra_opts) = @_;
1485 PVE
::Tools
::run_command
(['mount', '-o', 'bind', @extra_opts, $dir, $dest]);
1487 eval { PVE
::Tools
::run_command
(['mount', '-o', 'bind,remount,ro', $dest]); };
1489 warn "bindmount error\n";
1490 # don't leave writable bind-mounts behind...
1491 PVE
::Tools
::run_command
(['umount', $dest]);
1498 my ($dir, $parentfd, $last_dir, $dest, $ro, @extra_opts) = @_;
1500 my $srcdh = __bindmount_prepare
('/', $dir);
1502 __bindmount_do
($dir, $dest, $ro, @extra_opts);
1504 if (!__bindmount_verify
($srcdh, $parentfd, $last_dir, $ro)) {
1505 PVE
::Tools
::run_command
(['umount', $dest]);
1506 die "detected mount path change at: $dir\n";
1510 # Cleanup $rootdir a bit (double and trailing slashes), build the mount path
1511 # from $rootdir and $mount and walk the path from $rootdir to the final
1512 # directory to check for symlinks.
1513 sub __mount_prepare_rootdir
{
1514 my ($rootdir, $mount, $rootuid, $rootgid) = @_;
1515 $rootdir =~ s!/+!/!g;
1516 $rootdir =~ s!/+$!!;
1517 my $mount_path = "$rootdir/$mount";
1518 my ($mpfd, $parentfd, $last_dir) = walk_tree_nofollow
($rootdir, $mount, 1, $rootuid, $rootgid);
1519 return ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir);
1522 # use $rootdir = undef to just return the corresponding mount path
1523 sub mountpoint_mount
{
1524 my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_;
1525 return __mountpoint_mount
($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, undef);
1528 sub mountpoint_stage
{
1529 my ($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_;
1530 my ($path, $loop, $dev) =
1531 __mountpoint_mount
($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid, 1);
1533 if (!defined($path)) {
1534 return undef if $! == ENOSYS
;
1535 die "failed to mount subvolume: $!\n";
1538 # We clone the mount point and leave it there in order to keep them connected to eg. loop
1539 # devices in case we're hotplugging (which would allow contaienrs to unmount the new mount
1542 my $fd = PVE
::Tools
::open_tree
(&AT_FDCWD
, $stage_dir, &OPEN_TREE_CLOEXEC
| &OPEN_TREE_CLONE
)
1543 or die "open_tree() on mount point failed: $!\n";
1545 return wantarray ?
($path, $loop, $dev, $fd) : $fd;
1548 sub mountpoint_insert_staged
{
1549 my ($mount_fd, $rootdir_fd, $mp_dir, $opt, $rootuid, $rootgid) = @_;
1551 if (!defined($rootdir_fd)) {
1552 sysopen($rootdir_fd, '.', O_PATH
| O_DIRECTORY
)
1553 or die "failed to open '.': $!\n";
1556 my $dest_fd = walk_tree_nofollow_fd
('/', $rootdir_fd, $mp_dir, 1, $rootuid, $rootgid);
1558 PVE
::Tools
::move_mount
(
1563 &MOVE_MOUNT_F_EMPTY_PATH
| &MOVE_MOUNT_T_EMPTY_PATH
,
1564 ) or die "failed to move '$opt' into container hierarchy: $!\n";
1567 # Use $stage_mount, $rootdir is treated as a temporary path to "stage" the file system. The user
1568 # can then open a file descriptor to it which can be used with the `move_mount` syscall.
1569 # Note that if the kernel does not support the new mount API, this will not perform any action
1570 # and return `undef` with $! = ENOSYS.
1571 sub __mountpoint_mount
{
1572 my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, $stage_mount) = @_;
1574 if (defined($stage_mount) && !PVE
::LXC
::Tools
::can_use_new_mount_api
()) {
1579 # When staging mount points we always mount to $rootdir directly (iow. as if `mp=/`).
1580 # This is required since __mount_prepare_rootdir() will return handles to the parent directory
1581 # which we use in __bindmount_verify()!
1582 my $mount = $stage_mount ?
'/': $mountpoint->{mp
};
1584 my $volid = $mountpoint->{volume
};
1585 my $type = $mountpoint->{type
};
1586 my $quota = !$snapname && !$mountpoint->{ro
} && $mountpoint->{quota
};
1589 return if !$volid || !$mount;
1594 my ($mpfd, $parentfd, $last_dir);
1596 if (defined($rootdir)) {
1597 ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir) =
1598 __mount_prepare_rootdir
($rootdir, $mount, $rootuid, $rootgid);
1601 if (defined($stage_mount)) {
1602 $mount_path = $rootdir;
1605 my ($storage, $volname) = PVE
::Storage
::parse_volume_id
($volid, 1);
1607 die "unknown snapshot path for '$volid'" if !$storage && defined($snapname);
1611 if (my $mountopts = $mountpoint->{mountoptions
}) {
1612 my @opts = split(/;/, $mountpoint->{mountoptions
});
1613 push @$optlist, grep { PVE
::LXC
::Config
::is_valid_mount_option
($_) } @opts;
1616 my $acl = $mountpoint->{acl
};
1617 if (defined($acl)) {
1618 push @$optlist, ($acl ?
'acl' : 'noacl');
1621 my $optstring = join(',', @$optlist);
1622 my $readonly = $mountpoint->{ro
};
1625 @extra_opts = ('-o', $optstring) if $optstring;
1629 my $scfg = PVE
::Storage
::storage_config
($storage_cfg, $storage);
1631 my $path = PVE
::Storage
::map_volume
($storage_cfg, $volid, $snapname);
1633 $path = PVE
::Storage
::path
($storage_cfg, $volid, $snapname) if !defined($path);
1635 my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1636 PVE
::Storage
::parse_volname
($storage_cfg, $volid);
1638 $format = 'iso' if $vtype eq 'iso'; # allow to handle iso files
1640 if ($format eq 'subvol') {
1642 my (undef, $name) = PVE
::Storage
::parse_volname
($storage_cfg, $volid);
1643 if (defined($snapname)) {
1644 $name .= "\@$snapname";
1645 if ($scfg->{type
} eq 'zfspool') {
1646 PVE
::Tools
::run_command
(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', "$scfg->{pool}/$name", $mount_path]);
1648 die "cannot mount subvol snapshots for storage type '$scfg->{type}'\n";
1651 if (defined($acl) && $scfg->{type
} eq 'zfspool') {
1652 my $acltype = ($acl ?
'acltype=posixacl' : 'acltype=noacl');
1653 PVE
::Tools
::run_command
(['zfs', 'set', $acltype, "$scfg->{pool}/$name"]);
1655 bindmount
($path, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts);
1656 warn "cannot enable quota control for bind mounted subvolumes\n" if $quota;
1659 return wantarray ?
($path, 0, undef) : $path;
1660 } elsif ($format eq 'raw' || $format eq 'iso') {
1661 # NOTE: 'mount' performs canonicalization without the '-c' switch, which for
1662 # device-mapper devices is special-cased to use the /dev/mapper symlinks.
1663 # Our autodev hook expects the /dev/dm-* device currently
1664 # and will create the /dev/mapper symlink accordingly
1665 $path = Cwd
::realpath
($path);
1666 die "failed to get device path\n" if !$path;
1667 ($path) = ($path =~ /^(.*)$/s); #untaint
1671 if ($format eq 'iso') {
1672 PVE
::Tools
::run_command
(['mount', '-o', 'ro', @extra_opts, $path, $mount_path]);
1673 } elsif ($isBase || defined($snapname)) {
1674 PVE
::Tools
::run_command
(['mount', '-o', 'ro,noload', @extra_opts, $path, $mount_path]);
1677 push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0';
1679 push @extra_opts, '-o', 'ro' if $readonly;
1680 PVE
::Tools
::run_command
(['mount', @extra_opts, $path, $mount_path]);
1684 my $use_loopdev = 0;
1685 if ($scfg->{path
}) {
1686 $mounted_dev = run_with_loopdev
($domount, $path, $readonly);
1688 } elsif ($scfg->{type
} eq 'drbd' || $scfg->{type
} eq 'lvm' ||
1689 $scfg->{type
} eq 'rbd' || $scfg->{type
} eq 'lvmthin') {
1690 $mounted_dev = $path;
1693 die "unsupported storage type '$scfg->{type}'\n";
1695 return wantarray ?
($path, $use_loopdev, $mounted_dev) : $path;
1697 die "unsupported image format '$format'\n";
1699 } elsif ($type eq 'device') {
1700 push @extra_opts, '-o', 'ro' if $readonly;
1701 push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0' if $quota;
1702 # See the NOTE above about devicemapper canonicalization
1703 my ($devpath) = (Cwd
::realpath
($volid) =~ /^(.*)$/s); # realpath() taints
1704 PVE
::Tools
::run_command
(['mount', @extra_opts, $volid, $mount_path]) if $mount_path;
1705 return wantarray ?
($volid, 0, $devpath) : $volid;
1706 } elsif ($type eq 'bind') {
1707 die "directory '$volid' does not exist\n" if ! -d
$volid;
1708 bindmount
($volid, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts) if $mount_path;
1709 warn "cannot enable quota control for bind mounts\n" if $quota;
1710 return wantarray ?
($volid, 0, undef) : $volid;
1713 die "unsupported storage";
1716 sub mountpoint_hotplug
($$$) {
1717 my ($vmid, $conf, $opt, $mp, $storage_cfg) = @_;
1719 my (undef, $rootuid, $rootgid) = PVE
::LXC
::parse_id_maps
($conf);
1721 # We do the rest in a fork with an unshared mount namespace, because:
1722 # -) change our papparmor profile to that of /usr/bin/lxc-start
1723 # -) we're now going to 'stage' # the mountpoint, then grab it, then move into the
1724 # container's namespace, then mount it.
1726 PVE
::Tools
::run_fork
(sub {
1727 # Pin the container pid longer, we also need to get its monitor/parent:
1728 my ($ct_pid, $ct_pidfd) = open_lxc_pid
($vmid)
1729 or die "failed to open pidfd of container $vmid\'s init process\n";
1731 my ($monitor_pid, $monitor_pidfd) = open_ppid
($ct_pid)
1732 or die "failed to open pidfd of container $vmid\'s monitor process\n";
1734 my $ct_mnt_ns = $get_container_namespace->($vmid, $ct_pid, 'mnt');
1735 my $monitor_mnt_ns = $get_container_namespace->($vmid, $monitor_pid, 'mnt');
1737 # Grab a file descriptor to our apparmor label file so we can change into the 'lxc-start'
1738 # profile to lower our privileges to the same level we have in the start hook:
1739 sysopen(my $aa_fd, "/proc/self/attr/current", O_WRONLY
)
1740 or die "failed to open '/proc/self/attr/current' for writing: $!\n";
1741 # But switch namespaces first, to make sure the namespace switches aren't blocked by
1744 # Change into the monitor's mount namespace. We "pin" the mount into the monitor's
1745 # namespace for it to remain active there since the container will be able to unmount
1746 # hotplugged mount points and thereby potentially free up loop devices, which is a security
1748 PVE
::Tools
::setns
(fileno($monitor_mnt_ns), PVE
::Tools
::CLONE_NEWNS
);
1750 or die "failed to change root directory within the monitor's mount namespace: $!\n";
1752 my $dir = get_staging_mount_path
($opt);
1754 # Now switch our apparmor profile before mounting:
1755 my $data = 'changeprofile /usr/bin/lxc-start';
1756 if (syswrite($aa_fd, $data, length($data)) != length($data)) {
1757 die "failed to change apparmor profile: $!\n";
1759 # Check errors on close as well:
1761 or die "failed to change apparmor profile (close() failed): $!\n";
1763 my $mount_fd = mountpoint_stage
($mp, $dir, $storage_cfg, undef, $rootuid, $rootgid);
1765 PVE
::Tools
::setns
(fileno($ct_mnt_ns), PVE
::Tools
::CLONE_NEWNS
);
1767 or die "failed to change root directory within the container's mount namespace: $!\n";
1769 mountpoint_insert_staged
($mount_fd, undef, $mp->{mp
}, $opt, $rootuid, $rootgid);
1773 # Create a directory in the mountpoint staging tempfs.
1774 sub get_staging_mount_path
($) {
1777 my $target = get_staging_tempfs
() . "/$opt";
1778 if (!mkdir($target) && $! != EEXIST
) {
1779 die "failed to create directory $target: $!\n";
1785 # Mount /run/pve/mountpoints as tmpfs
1786 sub get_staging_tempfs
() {
1787 # We choose a path in /var/lib/lxc/ here because the lxc-start apparmor profile restricts most
1789 my $target = '/var/lib/lxc/.pve-staged-mounts';
1790 if (!mkdir($target)) {
1791 return $target if $! == EEXIST
;
1792 die "failed to create directory $target: $!\n";
1795 PVE
::Tools
::mount
("none", $target, 'tmpfs', 0, "size=8k,mode=755")
1796 or die "failed to mount $target as tmpfs: $!\n";
1802 my ($dev, $rootuid, $rootgid) = @_;
1810 "root_owner=$rootuid:$rootgid",
1815 # a hack to print only the relevant stuff, i.e., the one which could help on repair
1816 if ($line =~ /^(Creating filesystem|Filesystem UUID|Superblock backups|\s+\d+, \d)/) {
1822 print STDERR
"$line\n" if $line && $line !~ /^mke2fs \d\.\d/;
1828 my ($storage_cfg, $volid, $rootuid, $rootgid) = @_;
1830 if ($volid =~ m!^/dev/.+!) {
1835 my ($storage, $volname) = PVE
::Storage
::parse_volume_id
($volid, 1);
1837 die "cannot format volume '$volid' with no storage\n" if !$storage;
1839 PVE
::Storage
::activate_volumes
($storage_cfg, [$volid]);
1841 my $path = PVE
::Storage
::map_volume
($storage_cfg, $volid);
1843 $path = PVE
::Storage
::path
($storage_cfg, $volid) if !defined($path);
1845 my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1846 PVE
::Storage
::parse_volname
($storage_cfg, $volid);
1848 die "cannot format volume '$volid' (format == $format)\n"
1849 if $format ne 'raw';
1851 mkfs
($path, $rootuid, $rootgid);
1855 my ($storecfg, $vollist) = @_;
1857 foreach my $volid (@$vollist) {
1858 eval { PVE
::Storage
::vdisk_free
($storecfg, $volid); };
1864 my ($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid) = @_;
1866 my $needs_chown = 0;
1869 my $scfg = PVE
::Storage
::storage_config
($storecfg, $storage);
1870 # fixme: use better naming ct-$vmid-disk-X.raw?
1874 if ($scfg->{type
} eq 'dir' || $scfg->{type
} eq 'nfs' || $scfg->{type
} eq 'cifs' ) {
1876 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'raw',
1880 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'subvol',
1884 } elsif ($scfg->{type
} eq 'zfspool') {
1886 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'subvol',
1889 } elsif ($scfg->{type
} eq 'drbd' || $scfg->{type
} eq 'lvm' || $scfg->{type
} eq 'lvmthin') {
1891 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
1894 } elsif ($scfg->{type
} eq 'rbd') {
1896 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
1899 die "unable to create containers on storage type '$scfg->{type}'\n";
1901 format_disk
($storecfg, $volid, $rootuid, $rootgid) if $do_format;
1904 # in case formatting got interrupted:
1905 if (defined($volid)) {
1906 eval { PVE
::Storage
::vdisk_free
($storecfg, $volid); };
1912 return ($volid, $needs_chown);
1915 our $NEW_DISK_RE = qr/^([^:\s]+):(\d+(\.\d+)?)$/;
1917 my ($storecfg, $vmid, $settings, $conf, $pending) = @_;
1922 my (undef, $rootuid, $rootgid) = PVE
::LXC
::parse_id_maps
($conf);
1923 my $chown_vollist = [];
1925 PVE
::LXC
::Config-
>foreach_volume($settings, sub {
1926 my ($ms, $mountpoint) = @_;
1928 my $volid = $mountpoint->{volume
};
1929 my $mp = $mountpoint->{mp
};
1931 my ($storage, $volname) = PVE
::Storage
::parse_volume_id
($volid, 1);
1933 if ($storage && ($volid =~ $NEW_DISK_RE)) {
1934 my ($storeid, $size_gb) = ($1, $2);
1936 my $size_kb = int(${size_gb
}*1024) * 1024;
1938 my $needs_chown = 0;
1939 ($volid, $needs_chown) = alloc_disk
($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid);
1940 push @$chown_vollist, $volid if $needs_chown;
1941 push @$vollist, $volid;
1942 $mountpoint->{volume
} = $volid;
1943 $mountpoint->{size
} = $size_kb * 1024;
1945 $conf->{pending
}->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
1947 $conf->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
1950 # use specified/existing volid/dir/device
1951 $conf->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
1955 PVE
::Storage
::activate_volumes
($storecfg, $chown_vollist, undef);
1956 foreach my $volid (@$chown_vollist) {
1957 my $path = PVE
::Storage
::path
($storecfg, $volid, undef);
1958 chown($rootuid, $rootgid, $path);
1960 PVE
::Storage
::deactivate_volumes
($storecfg, $chown_vollist, undef);
1962 # free allocated images on error
1964 destroy_disks
($storecfg, $vollist);
1970 sub update_disksize
{
1971 my ($vmid, $conf, $all_volumes) = @_;
1974 my $prefix = "CT $vmid:";
1976 my $update_mp = sub {
1977 my ($key, $mp, @param) = @_;
1978 my $size = $all_volumes->{$mp->{volume
}}->{size
} // 0;
1980 if (!defined($mp->{size
}) || $size != $mp->{size
}) {
1982 print "$prefix updated volume size of '$mp->{volume}' in config.\n";
1983 $mp->{size
} = $size;
1984 my $nomp = 1 if ($key eq 'rootfs');
1985 $conf->{$key} = PVE
::LXC
::Config-
>print_ct_mountpoint($mp, $nomp);
1989 PVE
::LXC
::Config-
>foreach_volume($conf, $update_mp);
1995 my ($vmid, $conf, $all_volumes) = @_;
1998 my $prefix = "CT $vmid:";
2000 # Note: it is allowed to define multiple storage entries with the same path
2001 # (alias), so we need to check both 'volid' and real 'path' (two different
2002 # volid can point to the same path).
2004 # used and unused disks
2008 foreach my $opt (keys %$conf) {
2009 next if ($opt !~ m/^unused\d+$/);
2010 my $vol = $all_volumes->{$conf->{$opt}};
2011 $refpath->{$vol->{path
}} = $vol->{volid
};
2014 foreach my $key (keys %$all_volumes) {
2015 my $vol = $all_volumes->{$key};
2016 my $in_use = PVE
::LXC
::Config-
>is_volume_in_use($conf, $vol->{volid
});
2017 my $path = $vol->{path
};
2020 $refpath->{$path} = $key;
2021 delete $orphans->{$path};
2023 if ((!$orphans->{$path}) && (!$refpath->{$path})) {
2024 $orphans->{$path} = $key;
2029 for my $key (keys %$orphans) {
2030 my $disk = $orphans->{$key};
2031 my $unused = PVE
::LXC
::Config-
>add_unused_volume($conf, $disk);
2035 print "$prefix add unreferenced volume '$disk' as '$unused' to config.\n";
2043 my ($cfg, $vmid) = @_;
2045 my $info = PVE
::Storage
::vdisk_list
($cfg, undef, $vmid, undef, 'rootdir');
2047 my $all_volumes = {};
2048 foreach my $storeid (keys %$info) {
2049 foreach my $item (@{$info->{$storeid}}) {
2050 my $volid = $item->{volid
};
2051 next if !($volid && $item->{size
});
2052 $item->{path
} = PVE
::Storage
::path
($cfg, $volid);
2053 $all_volumes->{$volid} = $item;
2057 return $all_volumes;
2061 my ($vmid, $nolock, $dryrun) = @_;
2063 my $cfg = PVE
::Storage
::config
();
2065 print "rescan volumes...\n";
2066 my $all_volumes = scan_volids
($cfg, $vmid);
2068 my $updatefn = sub {
2072 my $conf = PVE
::LXC
::Config-
>load_config($vmid);
2074 PVE
::LXC
::Config-
>check_lock($conf);
2077 foreach my $volid (keys %$all_volumes) {
2078 my $info = $all_volumes->{$volid};
2079 $vm_volids->{$volid} = $info if $info->{vmid
} == $vmid;
2082 my $upu = update_unused
($vmid, $conf, $vm_volids);
2083 my $upd = update_disksize
($vmid, $conf, $vm_volids);
2084 $changes = $upu || $upd;
2086 PVE
::LXC
::Config-
>write_config($vmid, $conf) if $changes && !$dryrun;
2089 if (defined($vmid)) {
2093 PVE
::LXC
::Config-
>lock_config($vmid, $updatefn, $vmid);
2096 my $vmlist = config_list
();
2097 foreach my $vmid (keys %$vmlist) {
2101 PVE
::LXC
::Config-
>lock_config($vmid, $updatefn, $vmid);
2108 # bash completion helper
2110 sub complete_os_templates
{
2111 my ($cmdname, $pname, $cvalue) = @_;
2113 my $cfg = PVE
::Storage
::config
();
2117 if ($cvalue =~ m/^([^:]+):/) {
2121 my $vtype = $cmdname eq 'restore' ?
'backup' : 'vztmpl';
2122 my $data = PVE
::Storage
::template_list
($cfg, $storeid, $vtype);
2125 foreach my $id (keys %$data) {
2126 foreach my $item (@{$data->{$id}}) {
2127 push @$res, $item->{volid
} if defined($item->{volid
});
2134 my $complete_ctid_full = sub {
2137 my $idlist = vmstatus
();
2139 my $active_hash = list_active_containers
();
2143 foreach my $id (keys %$idlist) {
2144 my $d = $idlist->{$id};
2145 if (defined($running)) {
2146 next if $d->{template
};
2147 next if $running && !$active_hash->{$id};
2148 next if !$running && $active_hash->{$id};
2157 return &$complete_ctid_full();
2160 sub complete_ctid_stopped
{
2161 return &$complete_ctid_full(0);
2164 sub complete_ctid_running
{
2165 return &$complete_ctid_full(1);
2175 my $lxc = $conf->{lxc
};
2176 foreach my $entry (@$lxc) {
2177 my ($key, $value) = @$entry;
2178 # FIXME: remove the 'id_map' variant when lxc-3.0 arrives
2179 next if $key ne 'lxc.idmap' && $key ne 'lxc.id_map';
2180 if ($value =~ /^([ug])\s+(\d+)\s+(\d+)\s+(\d+)\s*$/) {
2181 my ($type, $ct, $host, $length) = ($1, $2, $3, $4);
2182 push @$id_map, [$type, $ct, $host, $length];
2184 $rootuid = $host if $type eq 'u';
2185 $rootgid = $host if $type eq 'g';
2188 die "failed to parse idmap: $value\n";
2192 if (!@$id_map && $conf->{unprivileged
}) {
2193 # Should we read them from /etc/subuid?
2194 $id_map = [ ['u', '0', '100000', '65536'],
2195 ['g', '0', '100000', '65536'] ];
2196 $rootuid = $rootgid = 100000;
2199 return ($id_map, $rootuid, $rootgid);
2202 sub userns_command
{
2205 return ['lxc-usernsexec', (map { ('-m', join(':', @$_)) } @$id_map), '--'];
2210 my sub print_ct_stderr_log
{
2212 my $log = eval { file_get_contents
("/run/pve/ct-$vmid.stderr") };
2215 while ($log =~ /^\h*(lxc-start:?\s+$vmid:?\s*\S+\s*)?(.*?)\h*$/gm) {
2217 print STDERR
"$line\n";
2221 my sub monitor_state_change
($$) {
2222 my ($monitor_socket, $vmid) = @_;
2223 die "no monitor socket\n" if !defined($monitor_socket);
2226 my ($type, $name, $value) = PVE
::LXC
::Monitor
::read_lxc_message
($monitor_socket);
2228 die "monitor socket: got EOF\n" if !defined($type);
2230 next if $name ne "$vmid" || $type ne 'STATE';
2232 if ($value eq PVE
::LXC
::Monitor
::STATE_STARTING
) {
2233 alarm(0); # don't timeout after seeing the starting state
2234 } elsif ($value eq PVE
::LXC
::Monitor
::STATE_ABORTING
||
2235 $value eq PVE
::LXC
::Monitor
::STATE_STOPPING
||
2236 $value eq PVE
::LXC
::Monitor
::STATE_STOPPED
) {
2238 } elsif ($value eq PVE
::LXC
::Monitor
::STATE_RUNNING
) {
2241 warn "unexpected message from monitor socket - " .
2242 "type: '$type' - value: '$value'\n";
2246 my sub monitor_start
($$) {
2247 my ($monitor_socket, $vmid) = @_;
2249 my $success = eval {
2250 PVE
::Tools
::run_with_timeout
(10, \
&monitor_state_change
, $monitor_socket, $vmid)
2253 warn "problem with monitor socket, but continuing anyway: $err\n";
2254 } elsif (!$success) {
2255 print_ct_stderr_log
($vmid);
2256 die "startup for container '$vmid' failed\n";
2261 my ($vmid, $conf, $skiplock, $debug) = @_;
2263 # apply pending changes while starting
2264 if (scalar(keys %{$conf->{pending
}})) {
2265 my $storecfg = PVE
::Storage
::config
();
2266 PVE
::LXC
::Config-
>vmconfig_apply_pending($vmid, $conf, $storecfg);
2267 PVE
::LXC
::Config-
>write_config($vmid, $conf);
2268 $conf = PVE
::LXC
::Config-
>load_config($vmid); # update/reload
2271 update_lxc_config
($vmid, $conf);
2273 my $skiplock_flag_fn = "/run/lxc/skiplock-$vmid";
2276 open(my $fh, '>', $skiplock_flag_fn) || die "failed to open $skiplock_flag_fn for writing: $!\n";
2280 my $storage_cfg = PVE
::Storage
::config
();
2281 my $vollist = PVE
::LXC
::Config-
>get_vm_volumes($conf);
2283 PVE
::Storage
::activate_volumes
($storage_cfg, $vollist);
2285 my $monitor_socket = eval { PVE
::LXC
::Monitor
::get_monitor_socket
() };
2288 unlink "/run/pve/ct-$vmid.stderr"; # systemd does not truncate log files
2290 my $is_debug = $debug || (!defined($debug) && $conf->{debug
});
2291 my $base_unit = $is_debug ?
'pve-container-debug' : 'pve-container';
2293 my $cmd = ['systemctl', 'start', "$base_unit\@$vmid"];
2295 PVE
::GuestHelpers
::exec_hookscript
($conf, $vmid, 'pre-start', 1);
2299 monitor_start
($monitor_socket, $vmid) if defined($monitor_socket);
2301 # if debug is requested, print the log it also when the start succeeded
2302 print_ct_stderr_log
($vmid) if $is_debug;
2305 unlink $skiplock_flag_fn;
2308 PVE
::GuestHelpers
::exec_hookscript
($conf, $vmid, 'post-start');
2313 # Helper to stop a container completely and make sure it has stopped completely.
2314 # This is necessary because we want the post-stop hook to have completed its
2315 # unmount-all step, but post-stop happens after lxc puts the container into the
2317 # $kill - if true it will always do an immediate hard-stop
2318 # $shutdown_timeout - the timeout to wait for a gracefull shutdown
2319 # $kill_after_timeout - if true, send a hardstop if shutdown timed out
2321 my ($vmid, $kill, $shutdown_timeout, $kill_after_timeout) = @_;
2323 # Open the container's command socket.
2324 my $path = "\0/var/lib/lxc/$vmid/command";
2325 my $sock = IO
::Socket
::UNIX-
>new(
2326 Type
=> SOCK_STREAM
(),
2330 return if $! == ECONNREFUSED
; # The container is not running
2331 die "failed to open container ${vmid}'s command socket: $!\n";
2334 my $conf = PVE
::LXC
::Config-
>load_config($vmid);
2335 PVE
::GuestHelpers
::exec_hookscript
($conf, $vmid, 'pre-stop');
2337 # Stop the container:
2339 my $cmd = ['lxc-stop', '-n', $vmid];
2342 push @$cmd, '--kill'; # doesn't allow timeouts
2344 # lxc-stop uses a default timeout
2345 push @$cmd, '--nokill' if !$kill_after_timeout;
2347 if (defined($shutdown_timeout)) {
2348 push @$cmd, '--timeout', $shutdown_timeout;
2349 # Give run_command 5 extra seconds
2350 $shutdown_timeout += 5;
2354 eval { run_command
($cmd, timeout
=> $shutdown_timeout) };
2359 my $result = <$sock>;
2361 return if !defined $result; # monitor is gone and the ct has stopped.
2362 die "container did not stop\n";
2366 my ($vmid, $timeout, $skiplock) = @_;
2368 PVE
::LXC
::Config-
>lock_config($vmid, sub {
2369 return if !check_running
($vmid);
2371 vm_stop
($vmid, 0, $timeout, 1); # kill if timeout exceeds
2373 my $conf = PVE
::LXC
::Config-
>load_config($vmid);
2374 vm_start
($vmid, $conf);
2381 return PVE
::Tools
::run_fork
(sub {
2382 # Unshare the mount namespace
2383 die "failed to unshare mount namespace: $!\n"
2384 if !PVE
::Tools
::unshare
(PVE
::Tools
::CLONE_NEWNS
);
2385 run_command
(['mount', '--make-rslave', '/']);
2390 my $copy_volume = sub {
2391 my ($src_volid, $src, $dst_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid) = @_;
2393 my $src_mp = { volume
=> $src_volid, mp
=> '/', ro
=> 1 };
2394 $src_mp->{type
} = PVE
::LXC
::Config-
>classify_mountpoint($src_volid);
2396 my $dst_mp = { volume
=> $dst_volid, mp
=> '/', ro
=> 0 };
2397 $dst_mp->{type
} = PVE
::LXC
::Config-
>classify_mountpoint($dst_volid);
2403 mountpoint_mount
($src_mp, $src, $storage_cfg, $snapname, $rootuid, $rootgid);
2404 push @mounted, $src;
2406 mountpoint_mount
($dst_mp, $dest, $storage_cfg, undef, $rootuid, $rootgid);
2407 push @mounted, $dest;
2420 '--one-file-system',
2421 "--bwlimit=$bwlimit",
2428 # Wait for rsync's children to release dest so that
2429 # consequent file operations (umount, remove) are possible
2430 while ((system {"fuser"} "fuser", "-s", $dest) == 0) {sleep 1};
2432 foreach my $mount (reverse @mounted) {
2433 eval { run_command
(['/bin/umount', $mount], errfunc
=> sub{})};
2434 warn "Can't umount $mount\n" if $@;
2437 # If this fails they're used as mount points in a concurrent operation
2438 # (which should not happen but there's also no real need to get rid of them).
2445 # Should not be called after unsharing the mount namespace!
2447 my ($mp, $vmid, $storage, $storage_cfg, $conf, $snapname, $bwlimit) = @_;
2449 die "cannot copy volumes of type $mp->{type}\n" if $mp->{type
} ne 'volume';
2450 File
::Path
::make_path
("/var/lib/lxc/$vmid");
2451 my $dest = "/var/lib/lxc/$vmid/.copy-volume-1";
2452 my $src = "/var/lib/lxc/$vmid/.copy-volume-2";
2454 # get id's for unprivileged container
2455 my (undef, $rootuid, $rootgid) = parse_id_maps
($conf);
2457 # Allocate the disk before unsharing in order to make sure zfs subvolumes
2458 # are visible in this namespace, otherwise the host only sees the empty
2459 # (not-mounted) directory.
2462 # Make sure $mp contains a correct size.
2463 $mp->{size
} = PVE
::Storage
::volume_size_info
($storage_cfg, $mp->{volume
});
2465 ($new_volid, $needs_chown) = alloc_disk
($storage_cfg, $vmid, $storage, $mp->{size
}/1024, $rootuid, $rootgid);
2467 PVE
::Storage
::activate_volumes
($storage_cfg, [$new_volid], undef);
2468 my $path = PVE
::Storage
::path
($storage_cfg, $new_volid, undef);
2469 chown($rootuid, $rootgid, $path);
2473 $copy_volume->($mp->{volume
}, $src, $new_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid);
2477 PVE
::Storage
::vdisk_free
($storage_cfg, $new_volid)
2478 if defined($new_volid);
2485 sub get_lxc_version
() {
2487 run_command
([qw(lxc-start --version)], outfunc
=> sub {
2489 # We only parse out major & minor version numbers.
2490 if ($line =~ /^(\d+)\.(\d+)(?:\D.*)?$/) {
2491 $version = [$1, $2];
2495 die "failed to get lxc version\n" if !defined($version);
2498 return $version->@*;
2503 if (PVE
::CGroup
::cgroup_mode
() == 2) {
2504 PVE
::LXC
::Command
::freeze
($vmid, 30);
2506 PVE
::LXC
::CGroup-
>new($vmid)->freeze_thaw(1);
2512 if (PVE
::CGroup
::cgroup_mode
() == 2) {
2513 PVE
::LXC
::Command
::unfreeze
($vmid, 30);
2515 PVE
::LXC
::CGroup-
>new($vmid)->freeze_thaw(0);