13 use Fcntl
qw(O_RDONLY O_WRONLY O_NOFOLLOW O_DIRECTORY);
14 use Errno
qw(ELOOP ENOTDIR EROFS ECONNREFUSED ENOSYS EEXIST);
16 use IO
::Poll
qw(POLLIN POLLHUP);
18 use PVE
::Exception
qw(raise_perm_exc);
22 use PVE
::JSONSchema
qw(get_standard_option);
35 use PVE
::AccessControl
;
37 use PVE
::RESTEnvironment
;
38 use PVE
::Syscall
qw(:fsmount);
40 use PVE
::GuestHelpers
qw(safe_string_ne safe_num_ne safe_boolean_ne);
43 use PVE
::LXC
::Monitor
;
46 use Time
::HiRes qw
(gettimeofday
);
49 require PVE
::Network
::SDN
::Zones
;
53 my $LXC_CONFIG_PATH = '/usr/share/lxc/config';
55 my $nodename = PVE
::INotify
::nodename
();
57 my $cpuinfo= PVE
::ProcFSTools
::read_cpuinfo
();
59 our $NEW_DISK_RE = qr/^([^:\s]+):(\d+(\.\d+)?)$/;
62 my $vmlist = PVE
::Cluster
::get_vmlist
();
64 return $res if !$vmlist || !$vmlist->{ids
};
65 my $ids = $vmlist->{ids
};
67 foreach my $vmid (keys %$ids) {
68 next if !$vmid; # skip CT0
69 my $d = $ids->{$vmid};
70 next if !$d->{node
} || $d->{node
} ne $nodename;
71 next if !$d->{type
} || $d->{type
} ne 'lxc';
72 $res->{$vmid} = { type
=> 'lxc', vmid
=> $vmid };
77 # container status helpers
79 sub list_active_containers
{
81 my $filename = "/proc/net/unix";
83 # similar test is used by lcxcontainers.c: list_active_containers
86 my $fh = IO
::File-
>new ($filename, "r");
89 while (defined(my $line = <$fh>)) {
90 if ($line =~ m/^[a-f0-9]+:\s+\S+\s+\S+\s+\S+\s+\S+\s+\S+\s+\d+\s+(\S+)$/) {
92 if ($path =~ m!^@/var/lib/lxc/(\d+)/command$!) {
103 # warning: this is slow
107 my $active_hash = list_active_containers
();
109 return 1 if defined($active_hash->{$vmid});
114 sub get_container_disk_usage
{
115 my ($vmid, $pid) = @_;
117 return PVE
::Tools
::df
("/proc/$pid/root/", 1);
120 my $last_proc_vmid_stat;
122 our $vmstatus_return_properties = {
123 vmid
=> get_standard_option
('pve-vmid'),
125 description
=> "LXC Container status.",
127 enum
=> ['stopped', 'running'],
130 description
=> "Maximum memory in bytes.",
136 description
=> "Maximum SWAP memory in bytes.",
142 description
=> "Root disk size in bytes.",
148 description
=> "Container name.",
153 description
=> "Uptime.",
156 renderer
=> 'duration',
159 description
=> "Maximum usable CPUs.",
164 description
=> "The current config lock, if any.",
169 description
=> "The current configured tags, if any.",
178 my $list = $opt_vmid ?
{ $opt_vmid => { type
=> 'lxc', vmid
=> int($opt_vmid) }} : config_list
();
180 my $active_hash = list_active_containers
();
182 my $cpucount = $cpuinfo->{cpus
} || 1;
184 my $cdtime = gettimeofday
;
186 my $uptime = (PVE
::ProcFSTools
::read_proc_uptime
(1))[0];
187 my $clock_ticks = POSIX
::sysconf
(&POSIX
::_SC_CLK_TCK
);
189 my $unprivileged = {};
191 foreach my $vmid (keys %$list) {
192 my $d = $list->{$vmid};
194 eval { $d->{pid
} = int(find_lxc_pid
($vmid)) if defined($active_hash->{$vmid}); };
195 warn $@ if $@; # ignore errors (consider them stopped)
197 $d->{status
} = $active_hash->{$vmid} ?
'running' : 'stopped';
199 my $cfspath = PVE
::LXC
::Config-
>cfs_config_path($vmid);
200 my $conf = PVE
::Cluster
::cfs_read_file
($cfspath) || {};
202 $unprivileged->{$vmid} = $conf->{unprivileged
};
204 $d->{name
} = $conf->{'hostname'} || "CT$vmid";
205 $d->{name
} =~ s/[\s]//g;
207 $d->{cpus
} = $conf->{cores
} || $conf->{cpulimit
};
208 $d->{cpus
} = $cpucount if !$d->{cpus
};
210 $d->{tags
} = $conf->{tags
} if defined($conf->{tags
});
213 my $res = get_container_disk_usage
($vmid, $d->{pid
});
214 $d->{disk
} = int($res->{used
});
215 $d->{maxdisk
} = int($res->{total
});
218 # use 4GB by default ??
219 if (my $rootfs = $conf->{rootfs
}) {
220 my $rootinfo = PVE
::LXC
::Config-
>parse_volume('rootfs', $rootfs);
221 $d->{maxdisk
} = $rootinfo->{size
} || (4*1024*1024*1024);
223 $d->{maxdisk
} = 4*1024*1024*1024;
229 $d->{maxmem
} = ($conf->{memory
}||512)*1024*1024;
230 $d->{maxswap
} = ($conf->{swap
}//0)*1024*1024;
241 $d->{template
} = 1 if PVE
::LXC
::Config-
>is_template($conf);
242 $d->{lock} = $conf->{lock} if $conf->{lock};
245 foreach my $vmid (keys %$list) {
246 my $d = $list->{$vmid};
249 next if !$pid; # skip stopped CTs
251 my $proc_pid_stat = PVE
::ProcFSTools
::read_proc_pid_stat
($pid);
252 $d->{uptime
} = int(($uptime - $proc_pid_stat->{starttime
}) / $clock_ticks); # the method lxcfs uses
254 my $unpriv = $unprivileged->{$vmid};
256 my $cgroups = PVE
::LXC
::CGroup-
>new($vmid);
258 if (defined(my $mem = $cgroups->get_memory_stat())) {
259 $d->{mem
} = int($mem->{mem
});
260 $d->{swap
} = int($mem->{swap
});
266 if (defined(my $blkio = $cgroups->get_io_stats())) {
267 $d->{diskread
} = int($blkio->{diskread
});
268 $d->{diskwrite
} = int($blkio->{diskwrite
});
274 if (defined(my $cpu = $cgroups->get_cpu_stat())) {
275 # Total time (in milliseconds) used up by the cpu.
276 my $used_ms = $cpu->{utime} + $cpu->{stime
};
278 my $old = $last_proc_vmid_stat->{$vmid};
280 $last_proc_vmid_stat->{$vmid} = {
288 my $delta_ms = ($cdtime - $old->{time}) * $cpucount * 1000.0;
289 if ($delta_ms > 1000.0) {
290 my $delta_used_ms = $used_ms - $old->{used
};
291 $d->{cpu
} = (($delta_used_ms / $delta_ms) * $cpucount) / $d->{cpus
};
292 $last_proc_vmid_stat->{$vmid} = {
298 $d->{cpu
} = $old->{cpu
};
305 my $netdev = PVE
::ProcFSTools
::read_proc_net_dev
();
307 foreach my $dev (keys %$netdev) {
308 next if $dev !~ m/^veth([1-9]\d*)i/;
310 my $d = $list->{$vmid};
314 $d->{netout
} += $netdev->{$dev}->{receive
};
315 $d->{netin
} += $netdev->{$dev}->{transmit
};
322 sub find_lxc_console_pids
{
326 PVE
::Tools
::dir_glob_foreach
('/proc', '\d+', sub {
329 my $cmdline = PVE
::Tools
::file_read_firstline
("/proc/$pid/cmdline");
332 my @args = split(/\0/, $cmdline);
334 # search for lxc-console -n <vmid>
335 return if scalar(@args) != 3;
336 return if $args[1] ne '-n';
337 return if $args[2] !~ m/^\d+$/;
338 return if $args[0] !~ m
|^(/usr/bin
/)?lxc-console
$|;
342 push @{$res->{$vmid}}, $pid;
354 $pid = $1 if $line =~ m/^PID:\s+(\d+)$/;
356 PVE
::Tools
::run_command
(['lxc-info', '-n', $vmid, '-p'], outfunc
=> $parser);
358 die "unable to get PID for CT $vmid (not running?)\n" if !$pid;
365 sysopen(my $fd, "/proc/$pid", O_RDONLY
| O_DIRECTORY
)
366 or die "failed to open /proc/$pid pid fd\n";
373 # Find the pid and open:
374 my $pid = find_lxc_pid
($vmid);
375 my $fd = open_pid_fd
($pid);
378 my $pid2 = find_lxc_pid
($vmid);
380 return () if $pid != $pid2;
387 # Find the parent pid via proc and open it:
388 my $stat = PVE
::ProcFSTools
::read_proc_pid_stat
($pid);
389 my $ppid = $stat->{ppid
} // die "failed to get parent pid\n";
391 my $fd = open_pid_fd
($ppid);
394 $stat = PVE
::ProcFSTools
::read_proc_pid_stat
($pid);
395 my $ppid2 = $stat->{ppid
} // die "failed to get parent pid for verification\n";
397 return () if $ppid != $ppid2;
401 # Note: we cannot use Net:IP, because that only allows strict
403 sub parse_ipv4_cidr
{
404 my ($cidr, $noerr) = @_;
406 if ($cidr =~ m!^($IPV4RE)(?:/(\d+))$! && ($2 > 7) && ($2 <= 32)) {
407 return { address
=> $1, netmask
=> $PVE::Network
::ipv4_reverse_mask-
>[$2] };
410 return undef if $noerr;
412 die "unable to parse ipv4 address/mask\n";
415 # With seccomp trap to userspace we now have the ability to optionally forward
416 # certain syscalls to the "host" to handle (via our pve-lxc-syscalld daemon).
418 # This means that there are cases where we need to create an extra seccomp
419 # profile for the container to load.
421 # This returns a configuration snippet added to the raw lxc config.
422 sub make_seccomp_config
{
423 my ($conf, $vmid, $conf_dir, $unprivileged, $features) = @_;
424 # User-configured profile has precedence, note that the user's entry would
425 # be written 'after' this line anyway...
426 if (PVE
::LXC
::Config-
>has_lxc_entry($conf, 'lxc.seccomp.profile')) {
427 # Warn the user if this conflicts with a feature:
428 my $warn = join(', ', grep { $features->{$_} } qw(keyctl mknod));
429 warn "explicitly configured lxc.seccomp.profile overrides the following settings: $warn\n"
430 if length($warn) > 0;
434 # Privileged containers keep using the default (which is already part of
435 # the files included via lxc.include, so we don't need to write it out,
436 # that way it stays admin-configurable via /usr/share/lxc/config/... as
438 return '' if !$unprivileged;
441 keyctl
=> ['errno 38'],
443 # Disable btrfs ioctrls since they don't work particularly well in user namespaces.
444 # Particularly, without the mount option to enable rmdir removing snapshots, user
445 # namespaces can create snapshots but neither `show` or `delete` them, which is quite
446 # horrible, so for now, just disable this entirely:
448 # BTRFS_IOCTL_MAGIC 0x94, _IOC type shift is 8,
449 # so `(req & 0xFF00) == 0x9400` is a btrfs ioctl and gets an EPERM
450 ioctl => ['errno 1 [1,0x9400,SCMP_CMP_MASKED_EQ,0xff00]'],
455 # Unprivileged containers will get keyctl() disabled by default as a
456 # workaround for systemd-networkd behavior. But we have an option to
457 # explicitly enable it:
458 if ($features->{keyctl
}) {
459 delete $rules->{keyctl
};
462 # By default, unprivileged containers cannot use `mknod` at all.
463 # Since lxc 3.2, we can use seccomp's trap to userspace feature for this,
464 # but for now this is experimental, so it has to be enabled via a feature
466 # Note that we only handle block and char devices (like lxd), the rest we
467 # leave up to the kernel. We may in the future remove this if seccomp gets
468 # a way to tell the kernel to "continue" a syscall.
469 if ($features->{mknod
}) {
470 my ($ok, $kernel) = PVE
::ProcFSTools
::check_kernel_release
(5, 3);
472 die "'mknod' feature requested, but kernel too old (found $kernel, required >= 5.3)\n";
475 $raw_conf .= "lxc.seccomp.notify.proxy = unix:/run/pve/lxc-syscalld.sock\n";
476 $raw_conf .= "lxc.seccomp.notify.cookie = $vmid\n";
479 # condition: (mode & S_IFMT) == S_IFCHR
480 'notify [1,8192,SCMP_CMP_MASKED_EQ,61440]',
481 # condition: (mode & S_IFMT) == S_IFBLK
482 'notify [1,24576,SCMP_CMP_MASKED_EQ,61440]',
484 $rules->{mknodat
} = [
485 # condition: (mode & S_IFMT) == S_IFCHR
486 'notify [2,8192,SCMP_CMP_MASKED_EQ,61440]',
487 # condition: (mode & S_IFMT) == S_IFBLK
488 'notify [2,24576,SCMP_CMP_MASKED_EQ,61440]',
492 # Now build the custom seccomp rule text...
493 my $extra_rules = join("\n", map {
495 map { "$syscall $_" } $rules->{$syscall}->@*
496 } sort keys %$rules) . "\n";
498 return $raw_conf if $extra_rules eq "\n";
500 # We still have the "most common" config readily available, so don't write
502 if ($raw_conf eq '' && $extra_rules eq "keyctl errno 38\n") {
503 # we have no extra $raw_conf and use the same we had in pve 6.1:
504 return "lxc.seccomp.profile = $LXC_CONFIG_PATH/pve-userns.seccomp\n";
507 # Write the rule file to the container's config path:
508 my $rule_file = "$conf_dir/rules.seccomp";
509 my $rule_data = file_get_contents
("$LXC_CONFIG_PATH/common.seccomp")
511 file_set_contents
($rule_file, $rule_data);
512 $raw_conf .= "lxc.seccomp.profile = $rule_file\n";
517 # Since lxc-3.0.2 we can have lxc generate a profile for the container
518 # automatically. The default should be equivalent to the old
519 # `lxc-container-default-cgns` profile.
521 # Additionally this also added `lxc.apparmor.raw` which can be used to inject
522 # additional lines into the profile. We can use that to allow mounting specific
524 sub make_apparmor_config
{
525 my ($conf, $unprivileged, $features) = @_;
527 # user-configured profile has precedence, but first we go through our own
528 # code to figure out whether we should warn the user:
530 my $raw = "lxc.apparmor.profile = generated\n";
533 if ($features->{fuse
}) {
534 # For the informational warning:
535 push @profile_uses, 'features:fuse';
538 # There's lxc.apparmor.allow_nesting now, which will add the necessary
539 # apparmor lines, create an apparmor namespace for the container, but also
540 # adds proc and sysfs mounts to /dev/.lxc/{proc,sys}. These do not have
541 # lxcfs mounted over them, because that would prevent the container from
542 # mounting new instances of them for nested containers.
543 if ($features->{nesting
}) {
544 push @profile_uses, 'features:nesting';
545 $raw .= "lxc.apparmor.allow_nesting = 1\n"
547 # In the default profile in /etc/apparmor.d we patch this in because
548 # otherwise a container can for example run `chown` on /sys, breaking
549 # access to it for non-CAP_DAC_OVERRIDE tools on the host:
550 $raw .= "lxc.apparmor.raw = deny mount -> /proc/,\n";
551 $raw .= "lxc.apparmor.raw = deny mount -> /sys/,\n";
552 # Preferably we could use the 'remount' flag but this does not sit well
553 # with apparmor_parser currently:
554 # mount options=(rw, nosuid, nodev, noexec, remount) -> /sys/,
557 if (my $mount = $features->{mount
}) {
558 push @profile_uses, 'features:mount';
559 foreach my $fs (PVE
::Tools
::split_list
($mount)) {
560 $raw .= "lxc.apparmor.raw = mount fstype=$fs,\n";
566 if (PVE
::LXC
::Config-
>has_lxc_entry($conf, 'lxc.apparmor.profile')) {
567 if (length(my $used = join(', ', @profile_uses))) {
568 warn "explicitly configured lxc.apparmor.profile overrides the following settings: $used\n";
576 sub update_lxc_config
{
577 my ($vmid, $conf) = @_;
579 my $dir = "/var/lib/lxc/$vmid";
581 if ($conf->{template
}) {
583 unlink "$dir/config";
588 my ($lxc_major, $lxc_minor) = get_lxc_version
();
592 if ($lxc_major >= 4) {
593 # Explicitly don't use relative directories, which is the default, but
594 # note that we do this mostly because they are only applied for *some*
595 # cgroups. Our pve-container@.service now starts lxc-start with `-F`,
596 # so we also don't need to worry about the new monitor cgroup to
598 $raw .= "lxc.cgroup.relative = 0\n";
600 # To make things easier, let's keep our previous cgroup layout and
601 # simply move the monitor outside:
602 $raw .= "lxc.cgroup.dir.monitor = lxc.monitor/$vmid\n";
603 # cgroup namespace separation for stronger limits:
604 $raw .= "lxc.cgroup.dir.container = lxc/$vmid\n";
605 $raw .= "lxc.cgroup.dir.container.inner = ns\n";
608 die "missing 'arch' - internal error" if !$conf->{arch
};
609 $raw .= "lxc.arch = $conf->{arch}\n";
611 my $custom_idmap = PVE
::LXC
::Config-
>has_lxc_entry($conf, 'lxc.idmap');
612 my $unprivileged = $conf->{unprivileged
} || $custom_idmap;
614 my $ostype = $conf->{ostype
} || die "missing 'ostype' - internal error";
616 File
::Path
::mkpath
($dir);
618 my $cfgpath = '/usr/share/lxc/config';
619 my $inc = "$cfgpath/$ostype.common.conf";
620 $inc ="$cfgpath/common.conf" if !-f
$inc;
621 $raw .= "lxc.include = $inc\n";
623 $inc = "$cfgpath/$ostype.userns.conf";
624 $inc = "$cfgpath/userns.conf" if !-f
$inc;
625 $raw .= "lxc.include = $inc\n";
628 my $features = PVE
::LXC
::Config-
>parse_features($conf->{features
});
630 $raw .= make_seccomp_config
($conf, $vmid, $dir, $unprivileged, $features);
631 $raw .= make_apparmor_config
($conf, $unprivileged, $features);
632 if ($features->{fuse
}) {
633 $raw .= "lxc.apparmor.raw = mount fstype=fuse,\n";
634 $raw .= "lxc.mount.entry = /dev/fuse dev/fuse none bind,create=file 0 0\n";
637 if ($unprivileged && !$features->{force_rw_sys
}) {
638 # unpriv. CT default to sys:rw, but that doesn't always plays well with
639 # systemd, e.g., systemd-networkd https://systemd.io/CONTAINER_INTERFACE/
640 $raw .= "lxc.mount.auto = sys:mixed\n";
643 # WARNING: DO NOT REMOVE this without making sure that loop device nodes
644 # cannot be exposed to the container with r/w access (cgroup perms).
645 # When this is enabled mounts will still remain in the monitor's namespace
646 # after the container unmounted them and thus will not detach from their
647 # files while the container is running!
648 $raw .= "lxc.monitor.unshare = 1\n";
650 my ($cgv1, $cgv2) = PVE
::CGroup
::get_cgroup_controllers
();
652 # Should we read them from /etc/subuid?
653 if ($unprivileged && !$custom_idmap) {
654 $raw .= "lxc.idmap = u 0 100000 65536\n";
655 $raw .= "lxc.idmap = g 0 100000 65536\n";
658 if (!PVE
::LXC
::Config-
>has_dev_console($conf)) {
659 $raw .= "lxc.console.path = none\n";
660 if ($cgv1->{devices
}) {
661 $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n";
662 } elsif (defined($cgv2)) {
663 $raw .= "lxc.cgroup2.devices.deny = c 5:1 rwm\n";
667 my $ttycount = PVE
::LXC
::Config-
>get_tty_count($conf);
668 $raw .= "lxc.tty.max = $ttycount\n";
670 # some init scripts expect a linux terminal (turnkey).
671 $raw .= "lxc.environment = TERM=linux\n";
673 my $utsname = $conf->{hostname
} || "CT$vmid";
674 $raw .= "lxc.uts.name = $utsname\n";
676 if ($cgv1->{memory
}) {
677 my $memory = $conf->{memory
} || 512;
678 my $swap = $conf->{swap
} // 0;
680 my $lxcmem = int($memory*1024*1024);
681 $raw .= "lxc.cgroup.memory.limit_in_bytes = $lxcmem\n";
683 my $lxcswap = int(($memory + $swap)*1024*1024);
684 $raw .= "lxc.cgroup.memory.memsw.limit_in_bytes = $lxcswap\n";
685 } elsif ($cgv2->{memory
}) {
686 my $memory = $conf->{memory
} || 512;
687 my $swap = $conf->{swap
} // 0;
689 my $lxcmem = int($memory*1024*1024);
690 $raw .= "lxc.cgroup2.memory.max = $lxcmem\n";
692 my $lxcswap = int($swap*1024*1024);
693 $raw .= "lxc.cgroup2.memory.swap.max = $lxcswap\n";
697 if (my $cpulimit = $conf->{cpulimit
}) {
698 $raw .= "lxc.cgroup.cpu.cfs_period_us = 100000\n";
699 my $value = int(100000*$cpulimit);
700 $raw .= "lxc.cgroup.cpu.cfs_quota_us = $value\n";
703 my $shares = PVE
::CGroup
::clamp_cpu_shares
($conf->{cpuunits
});
704 $raw .= "lxc.cgroup.cpu.shares = $shares\n";
705 } elsif ($cgv2->{cpu
}) {
707 if (my $cpulimit = $conf->{cpulimit
}) {
708 my $value = int(100000*$cpulimit);
709 $raw .= "lxc.cgroup2.cpu.max = $value 100000\n";
712 if (defined(my $shares = $conf->{cpuunits
})) {
713 $shares = PVE
::CGroup
::clamp_cpu_shares
($shares);
714 $raw .= "lxc.cgroup2.cpu.weight = $shares\n";
718 die "missing 'rootfs' configuration\n"
719 if !defined($conf->{rootfs
});
721 my $mountpoint = PVE
::LXC
::Config-
>parse_volume('rootfs', $conf->{rootfs
});
723 $raw .= "lxc.rootfs.path = $dir/rootfs\n";
725 foreach my $k (sort keys %$conf) {
726 next if $k !~ m/^net(\d+)$/;
728 my $d = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$k});
729 $raw .= "lxc.net.$ind.type = veth\n";
730 $raw .= "lxc.net.$ind.veth.pair = veth${vmid}i${ind}\n";
731 $raw .= "lxc.net.$ind.hwaddr = $d->{hwaddr}\n" if defined($d->{hwaddr
});
732 $raw .= "lxc.net.$ind.name = $d->{name}\n" if defined($d->{name
});
734 # Keep container from starting with invalid mtu configuration
735 if (my $mtu = $d->{mtu
}) {
736 my $bridge_mtu = PVE
::Network
::read_bridge_mtu
($d->{bridge
});
737 die "$k: MTU size '$mtu' is bigger than bridge MTU '$bridge_mtu'\n"
738 if ($mtu > $bridge_mtu);
740 $raw .= "lxc.net.$ind.mtu = $mtu\n";
743 # Starting with lxc 4.0, we do not patch lxc to execute our up-scripts.
744 if ($lxc_major >= 4) {
745 $raw .= "lxc.net.$ind.script.up = /usr/share/lxc/lxcnetaddbr\n";
750 if (my $lxcconf = $conf->{lxc
}) {
751 foreach my $entry (@$lxcconf) {
752 my ($k, $v) = @$entry;
753 $had_cpuset = 1 if $k eq 'lxc.cgroup.cpuset.cpus' || $k eq 'lxc.cgroup2.cpuset.cpus';
759 my ($cpuset_cgroup, $cpuset_version) = eval { PVE
::CGroup
::cpuset_controller_path
() };
760 if (defined($cpuset_cgroup)) {
761 $cpuset = eval { PVE
::CpuSet-
>new_from_path("$cpuset_cgroup/lxc", 1) }
762 || PVE
::CpuSet-
>new_from_path($cpuset_cgroup, 1);
764 my $cores = $conf->{cores
};
765 if (!$had_cpuset && $cores && $cpuset) {
766 my @members = $cpuset->members();
767 while (scalar(@members) > $cores) {
768 my $randidx = int(rand(scalar(@members)));
769 $cpuset->delete($members[$randidx]);
770 splice(@members, $randidx, 1); # keep track of the changes
772 my $ver = $cpuset_version == 1 ?
'' : '2';
773 $raw .= "lxc.cgroup$ver.cpuset.cpus = ".$cpuset->short_string()."\n";
776 File
::Path
::mkpath
("$dir/rootfs");
778 PVE
::Tools
::file_set_contents
("$dir/config", $raw);
781 # verify and cleanup nameserver list (replace \0 with ' ')
782 sub verify_nameserver_list
{
783 my ($nameserver_list) = @_;
786 foreach my $server (PVE
::Tools
::split_list
($nameserver_list)) {
787 PVE
::LXC
::Config
::verify_ip_with_ll_iface
($server);
791 return join(' ', @list);
794 sub verify_searchdomain_list
{
795 my ($searchdomain_list) = @_;
798 foreach my $server (PVE
::Tools
::split_list
($searchdomain_list)) {
799 # todo: should we add checks for valid dns domains?
803 return join(' ', @list);
806 sub get_console_command
{
807 my ($vmid, $conf, $escapechar) = @_;
809 # '-1' as $escapechar disables keyboard escape sequence
810 # any other passed char (a-z) will result in <Ctrl+$escapechar q>
812 my $cmode = PVE
::LXC
::Config-
>get_cmode($conf);
815 if ($cmode eq 'console') {
816 push @$cmd, 'lxc-console', '-n', $vmid, '-t', 0;
817 push @$cmd, '-e', $escapechar if $escapechar;
818 } elsif ($cmode eq 'tty') {
819 push @$cmd, 'lxc-console', '-n', $vmid;
820 push @$cmd, '-e', $escapechar if $escapechar;
821 } elsif ($cmode eq 'shell') {
822 push @$cmd, 'lxc-attach', '--clear-env', '-n', $vmid;
824 die "internal error";
830 sub get_primary_ips
{
833 # return data from net0
835 return undef if !defined($conf->{net0
});
836 my $net = PVE
::LXC
::Config-
>parse_lxc_network($conf->{net0
});
838 my $ipv4 = $net->{ip
};
840 if ($ipv4 =~ /^(dhcp|manual)$/) {
846 my $ipv6 = $net->{ip6
};
848 if ($ipv6 =~ /^(auto|dhcp|manual)$/) {
855 return ($ipv4, $ipv6);
858 sub delete_mountpoint_volume
{
859 my ($storage_cfg, $vmid, $volume) = @_;
861 return if PVE
::LXC
::Config-
>classify_mountpoint($volume) ne 'volume';
863 my ($vtype, $name, $owner) = PVE
::Storage
::parse_volname
($storage_cfg, $volume);
865 if ($vmid == $owner) {
866 PVE
::Storage
::vdisk_free
($storage_cfg, $volume);
868 warn "ignore deletion of '$volume', CT $vmid isn't the owner!\n";
872 sub destroy_lxc_container
{
873 my ($storage_cfg, $vmid, $conf, $replacement_conf, $purge_unreferenced) = @_;
876 my $remove_volume = sub {
877 my ($ms, $mountpoint) = @_;
879 my $volume = $mountpoint->{volume
};
881 return if $volids->{$volume};
882 $volids->{$volume} = 1;
884 delete_mountpoint_volume
($storage_cfg, $vmid, $volume);
886 PVE
::LXC
::Config-
>foreach_volume_full($conf, {include_unused
=> 1}, $remove_volume);
888 PVE
::LXC
::Config-
>foreach_volume_full($conf->{pending
}, {include_unused
=> 1}, $remove_volume);
890 if ($purge_unreferenced) { # also remove unreferenced disk
891 my $vmdisks = PVE
::Storage
::vdisk_list
($storage_cfg, undef, $vmid, undef, 'rootdir');
892 PVE
::Storage
::foreach_volid
($vmdisks, sub {
893 my ($volid, $sid, $volname, $d) = @_;
894 eval { PVE
::Storage
::vdisk_free
($storage_cfg, $volid) };
899 rmdir "/var/lib/lxc/$vmid/rootfs";
900 unlink "/var/lib/lxc/$vmid/config";
901 rmdir "/var/lib/lxc/$vmid";
902 if (defined $replacement_conf) {
903 PVE
::LXC
::Config-
>write_config($vmid, $replacement_conf);
905 PVE
::LXC
::Config-
>destroy_config($vmid);
909 sub vm_stop_cleanup
{
910 my ($storage_cfg, $vmid, $conf, $keepActive) = @_;
912 return if $keepActive;
915 my $vollist = PVE
::LXC
::Config-
>get_vm_volumes($conf);
916 PVE
::Storage
::deactivate_volumes
($storage_cfg, $vollist);
918 warn $@ if $@; # avoid errors - just warn
921 sub net_tap_plug
: prototype($$) {
922 my ($iface, $net) = @_;
924 if (defined($net->{link_down
})) {
925 PVE
::Tools
::run_command
(['/sbin/ip', 'link', 'set', 'dev', $iface, 'down']);
926 # Don't add disconnected interfaces to the bridge, otherwise e.g. applying any network
927 # change (e.g. `ifreload -a`) could (re-)activate it unintentionally.
931 my ($bridge, $tag, $firewall, $trunks, $rate, $hwaddr) =
932 $net->@{'bridge', 'tag', 'firewall', 'trunks', 'rate', 'hwaddr'};
935 PVE
::Network
::SDN
::Zones
::tap_plug
($iface, $bridge, $tag, $firewall, $trunks, $rate);
936 PVE
::Network
::SDN
::Zones
::add_bridge_fdb
($iface, $hwaddr, $bridge, $firewall);
938 PVE
::Network
::tap_plug
($iface, $bridge, $tag, $firewall, $trunks, $rate, { mac
=> $hwaddr });
941 PVE
::Tools
::run_command
(['/sbin/ip', 'link', 'set', 'dev', $iface, 'up']);
945 my ($vmid, $conf, $opt, $newnet, $netid, $rootdir) = @_;
947 if ($newnet->{type
} ne 'veth') {
948 # for when there are physical interfaces
949 die "cannot update interface of type $newnet->{type}";
952 my $veth = "veth${vmid}i${netid}";
953 my $eth = $newnet->{name
};
955 if (my $oldnetcfg = $conf->{$opt}) {
956 my $oldnet = PVE
::LXC
::Config-
>parse_lxc_network($oldnetcfg);
958 if (safe_string_ne
($oldnet->{hwaddr
}, $newnet->{hwaddr
}) ||
959 safe_string_ne
($oldnet->{name
}, $newnet->{name
})) {
961 PVE
::Network
::veth_delete
($veth);
962 delete $conf->{$opt};
963 PVE
::LXC
::Config-
>write_config($vmid, $conf);
965 hotplug_net
($vmid, $conf, $opt, $newnet, $netid);
968 if (safe_string_ne
($oldnet->{bridge
}, $newnet->{bridge
}) ||
969 safe_num_ne
($oldnet->{tag
}, $newnet->{tag
}) ||
970 safe_num_ne
($oldnet->{firewall
}, $newnet->{firewall
}) ||
971 safe_boolean_ne
($oldnet->{link_down
}, $newnet->{link_down
})
974 if ($oldnet->{bridge
}) {
975 PVE
::Network
::tap_unplug
($veth);
976 foreach (qw(bridge tag firewall)) {
977 delete $oldnet->{$_};
979 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($oldnet);
980 PVE
::LXC
::Config-
>write_config($vmid, $conf);
983 PVE
::LXC
::net_tap_plug
($veth, $newnet);
985 # This includes the rate:
986 foreach (qw(bridge tag firewall rate link_down)) {
987 $oldnet->{$_} = $newnet->{$_} if $newnet->{$_};
989 } elsif (safe_string_ne
($oldnet->{rate
}, $newnet->{rate
})) {
990 # Rate can be applied on its own but any change above needs to
991 # include the rate in tap_plug since OVS resets everything.
992 PVE
::Network
::tap_rate_limit
($veth, $newnet->{rate
});
993 $oldnet->{rate
} = $newnet->{rate
}
995 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($oldnet);
996 PVE
::LXC
::Config-
>write_config($vmid, $conf);
999 hotplug_net
($vmid, $conf, $opt, $newnet, $netid);
1002 update_ipconfig
($vmid, $conf, $opt, $eth, $newnet, $rootdir);
1006 my ($vmid, $conf, $opt, $newnet, $netid) = @_;
1008 my $veth = "veth${vmid}i${netid}";
1009 my $vethpeer = $veth . "p";
1010 my $eth = $newnet->{name
};
1013 PVE
::Network
::SDN
::Zones
::veth_create
($veth, $vethpeer, $newnet->{bridge
}, $newnet->{hwaddr
});
1015 PVE
::Network
::veth_create
($veth, $vethpeer, $newnet->{bridge
}, $newnet->{hwaddr
});
1018 PVE
::LXC
::net_tap_plug
($veth, $newnet);
1020 # attach peer in container
1021 my $cmd = ['lxc-device', '-n', $vmid, 'add', $vethpeer, "$eth" ];
1022 PVE
::Tools
::run_command
($cmd);
1024 # link up peer in container
1025 $cmd = ['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', '/sbin/ip', 'link', 'set', $eth ,'up' ];
1026 PVE
::Tools
::run_command
($cmd);
1028 my $done = { type
=> 'veth' };
1029 foreach (qw(bridge tag firewall hwaddr name link_down)) {
1030 $done->{$_} = $newnet->{$_} if $newnet->{$_};
1032 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($done);
1034 PVE
::LXC
::Config-
>write_config($vmid, $conf);
1037 sub update_ipconfig
{
1038 my ($vmid, $conf, $opt, $eth, $newnet, $rootdir) = @_;
1040 my $lxc_setup = PVE
::LXC
::Setup-
>new($conf, $rootdir);
1042 my $optdata = PVE
::LXC
::Config-
>parse_lxc_network($conf->{$opt});
1046 my $cmdargs = shift;
1047 PVE
::Tools
::run_command
(['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', @_], %$cmdargs);
1049 my $ipcmd = sub { &$nscmd({}, '/sbin/ip', @_) };
1051 my $change_ip_config = sub {
1052 my ($ipversion) = @_;
1054 my $family_opt = "-$ipversion";
1055 my $suffix = $ipversion == 4 ?
'' : $ipversion;
1056 my $gw= "gw$suffix";
1057 my $ip= "ip$suffix";
1059 my $newip = $newnet->{$ip};
1060 my $newgw = $newnet->{$gw};
1061 my $oldip = $optdata->{$ip};
1062 my $oldgw = $optdata->{$gw};
1064 my $change_ip = safe_string_ne
($oldip, $newip);
1065 my $change_gw = safe_string_ne
($oldgw, $newgw);
1067 return if !$change_ip && !$change_gw;
1069 # step 1: add new IP, if this fails we cancel
1070 my $is_real_ip = ($newip && $newip !~ /^(?:auto|dhcp|manual)$/);
1071 if ($change_ip && $is_real_ip) {
1072 eval { &$ipcmd($family_opt, 'addr', 'add', $newip, 'dev', $eth); };
1079 # step 2: replace gateway
1080 # If this fails we delete the added IP and cancel.
1081 # If it succeeds we save the config and delete the old IP, ignoring
1082 # errors. The config is then saved.
1083 # Note: 'ip route replace' can add
1087 if ($is_real_ip && !PVE
::Network
::is_ip_in_cidr
($newgw, $newip, $ipversion)) {
1088 &$ipcmd($family_opt, 'route', 'add', $newgw, 'dev', $eth);
1090 &$ipcmd($family_opt, 'route', 'replace', 'default', 'via', $newgw);
1094 # the route was not replaced, the old IP is still available
1095 # rollback (delete new IP) and cancel
1097 eval { &$ipcmd($family_opt, 'addr', 'del', $newip, 'dev', $eth); };
1098 warn $@ if $@; # no need to die here
1103 eval { &$ipcmd($family_opt, 'route', 'del', 'default'); };
1104 # if the route was not deleted, the guest might have deleted it manually
1108 if ($oldgw && $oldip && !PVE
::Network
::is_ip_in_cidr
($oldgw, $oldip)) {
1109 eval { &$ipcmd($family_opt, 'route', 'del', $oldgw, 'dev', $eth); };
1110 # warn if the route was deleted manually
1115 # from this point on we save the configuration
1116 # step 3: delete old IP ignoring errors
1117 if ($change_ip && $oldip && $oldip !~ /^(?:auto|dhcp)$/) {
1118 # We need to enable promote_secondaries, otherwise our newly added
1119 # address will be removed along with the old one.
1122 if ($ipversion == 4) {
1123 &$nscmd({ outfunc
=> sub { $promote = int(shift) } },
1124 'cat', "/proc/sys/net/ipv4/conf/$eth/promote_secondaries");
1125 &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=1");
1127 &$ipcmd($family_opt, 'addr', 'del', $oldip, 'dev', $eth);
1129 warn $@ if $@; # no need to die here
1131 if ($ipversion == 4) {
1132 &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=$promote");
1136 foreach my $property ($ip, $gw) {
1137 if ($newnet->{$property}) {
1138 $optdata->{$property} = $newnet->{$property};
1140 delete $optdata->{$property};
1143 $conf->{$opt} = PVE
::LXC
::Config-
>print_lxc_network($optdata);
1144 PVE
::LXC
::Config-
>write_config($vmid, $conf);
1145 $lxc_setup->setup_network($conf);
1148 &$change_ip_config(4);
1149 &$change_ip_config(6);
1153 my $open_namespace = sub {
1154 my ($vmid, $pid, $kind) = @_;
1155 sysopen my $fd, "/proc/$pid/ns/$kind", O_RDONLY
1156 or die "failed to open $kind namespace of container $vmid: $!\n";
1160 my $enter_namespace = sub {
1161 my ($vmid, $pid, $kind, $type) = @_;
1162 my $fd = $open_namespace->($vmid, $pid, $kind);
1163 PVE
::Tools
::setns
(fileno($fd), $type)
1164 or die "failed to enter $kind namespace of container $vmid: $!\n";
1168 my $get_container_namespace = sub {
1169 my ($vmid, $pid, $kind) = @_;
1172 if (!defined($pid)) {
1173 # Pin the pid while we're grabbing its stuff from /proc
1174 ($pid, $pidfd) = open_lxc_pid
($vmid)
1175 or die "failed to open pidfd of container $vmid\'s init process\n";
1178 return $open_namespace->($vmid, $pid, $kind);
1181 my $do_syncfs = sub {
1182 my ($vmid, $pid, $socket) = @_;
1184 &$enter_namespace($vmid, $pid, 'mnt', PVE
::Tools
::CLONE_NEWNS
);
1186 # Tell the parent process to start reading our /proc/mounts
1187 print {$socket} "go\n";
1190 # Receive /proc/self/mounts
1191 my $mountdata = do { local $/ = undef; <$socket> };
1207 # Now sync all mountpoints...
1208 my $mounts = PVE
::ProcFSTools
::parse_mounts
($mountdata);
1209 foreach my $mp (@$mounts) {
1210 my ($what, $dir, $fs) = @$mp;
1211 next if $nosyncfs{$fs};
1212 eval { PVE
::Tools
::sync_mountpoint
($dir); };
1217 sub sync_container_namespace
{
1219 my $pid = find_lxc_pid
($vmid);
1221 # SOCK_DGRAM is nicer for barriers but cannot be slurped
1222 socketpair my $pfd, my $cfd, AF_UNIX
, SOCK_STREAM
, PF_UNSPEC
1223 or die "failed to create socketpair: $!\n";
1226 die "fork failed: $!\n" if !defined($child);
1231 &$do_syncfs($vmid, $pid, $cfd);
1241 die "failed to enter container namespace\n" if $go ne "go\n";
1243 open my $mounts, '<', "/proc/$child/mounts"
1244 or die "failed to open container's /proc/mounts: $!\n";
1245 my $mountdata = do { local $/ = undef; <$mounts> };
1247 print {$pfd} $mountdata;
1250 while (waitpid($child, 0) != $child) {}
1251 die "failed to sync container namespace\n" if $? != 0;
1254 sub template_create
{
1255 my ($vmid, $conf) = @_;
1257 my $storecfg = PVE
::Storage
::config
();
1259 PVE
::LXC
::Config-
>foreach_volume($conf, sub {
1260 my ($ms, $mountpoint) = @_;
1262 my $volid = $mountpoint->{volume
};
1264 die "Template feature is not available for '$volid'\n"
1265 if !PVE
::Storage
::volume_has_feature
($storecfg, 'template', $volid);
1268 PVE
::LXC
::Config-
>foreach_volume($conf, sub {
1269 my ($ms, $mountpoint) = @_;
1271 my $volid = $mountpoint->{volume
};
1273 PVE
::Storage
::activate_volumes
($storecfg, [$volid]);
1275 my $template_volid = PVE
::Storage
::vdisk_create_base
($storecfg, $volid);
1276 $mountpoint->{volume
} = $template_volid;
1277 $conf->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq "rootfs");
1280 PVE
::LXC
::Config-
>write_config($vmid, $conf);
1283 sub check_ct_modify_config_perm
{
1284 my ($rpcenv, $authuser, $vmid, $pool, $oldconf, $newconf, $delete, $unprivileged) = @_;
1286 return 1 if $authuser eq 'root@pam';
1287 my $storage_cfg = PVE
::Storage
::config
();
1290 my ($opt, $delete) = @_;
1291 if ($opt eq 'cores' || $opt eq 'cpuunits' || $opt eq 'cpulimit') {
1292 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.CPU']);
1293 } elsif ($opt eq 'rootfs' || $opt =~ /^mp\d+$/) {
1294 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk']);
1296 my $data = PVE
::LXC
::Config-
>parse_volume($opt, $newconf->{$opt});
1297 raise_perm_exc
("mount point type $data->{type} is only allowed for root\@pam")
1298 if $data->{type
} ne 'volume';
1299 my $volid = $data->{volume
};
1300 if ($volid =~ $NEW_DISK_RE) {
1302 $rpcenv->check($authuser, "/storage/$sid", ['Datastore.AllocateSpace']);
1304 PVE
::Storage
::check_volume_access
(
1313 } elsif ($opt eq 'memory' || $opt eq 'swap') {
1314 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Memory']);
1315 } elsif ($opt =~ m/^net\d+$/ || $opt eq 'nameserver' ||
1316 $opt eq 'searchdomain' || $opt eq 'hostname') {
1317 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Network']);
1318 } elsif ($opt eq 'features') {
1319 raise_perm_exc
("changing feature flags for privileged container is only allowed for root\@pam")
1322 my $nesting_changed = 0;
1323 my $other_changed = 0;
1325 my $features = PVE
::LXC
::Config-
>parse_features($newconf->{$opt});
1326 if (defined($oldconf) && $oldconf->{$opt}) {
1327 # existing container with features
1328 my $old_features = PVE
::LXC
::Config-
>parse_features($oldconf->{$opt});
1329 for my $feature ((keys %$old_features, keys %$features)) {
1330 my $old = $old_features->{$feature} // '';
1331 my $new = $features->{$feature} // '';
1333 if ($feature eq 'nesting') {
1334 $nesting_changed = 1;
1343 # new container or no features defined
1344 if (scalar(keys %$features) == 1 && $features->{nesting
}) {
1345 $nesting_changed = 1;
1346 } elsif (scalar(keys %$features) > 0) {
1351 my $features = PVE
::LXC
::Config-
>parse_features($oldconf->{$opt});
1352 if (scalar(keys %$features) == 1 && $features->{nesting
}) {
1353 $nesting_changed = 1;
1354 } elsif (scalar(keys %$features) > 0) {
1358 raise_perm_exc
("changing feature flags (except nesting) is only allowed for root\@pam")
1360 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Allocate'])
1361 if $nesting_changed;
1362 } elsif ($opt eq 'hookscript') {
1363 # For now this is restricted to root@pam
1364 raise_perm_exc
("changing the hookscript is only allowed for root\@pam");
1365 } elsif ($opt eq 'tags') {
1366 my $old = $oldconf->{$opt};
1367 my $new = $delete ?
'' : $newconf->{$opt};
1368 PVE
::GuestHelpers
::assert_tag_permissions
($vmid, $old, $new, $rpcenv, $authuser);
1370 $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Options']);
1374 foreach my $opt (keys %$newconf) {
1377 foreach my $opt (@$delete) {
1385 my ($vmid, $storage_cfg, $conf, $noerr) = @_;
1387 my $rootdir = "/var/lib/lxc/$vmid/rootfs";
1388 my $volid_list = PVE
::LXC
::Config-
>get_vm_volumes($conf);
1392 PVE
::LXC
::Config-
>foreach_volume_full($conf, {'reverse' => 1}, sub {
1393 my ($ms, $mountpoint) = @_;
1395 my $volid = $mountpoint->{volume
};
1396 my $mount = $mountpoint->{mp
};
1398 return if !$volid || !$mount;
1400 my $mount_path = "$rootdir/$mount";
1401 $mount_path =~ s!/+!/!g;
1403 return if !PVE
::ProcFSTools
::is_mounted
($mount_path);
1406 PVE
::Tools
::run_command
(['umount', '-d', $mount_path]);
1418 return $res; # tell caller if (some) umounts failed for the noerr case
1422 my ($vmid, $storage_cfg, $conf, $ignore_ro) = @_;
1424 my $rootdir = "/var/lib/lxc/$vmid/rootfs";
1425 File
::Path
::make_path
($rootdir);
1427 my $volid_list = PVE
::LXC
::Config-
>get_vm_volumes($conf);
1428 PVE
::Storage
::activate_volumes
($storage_cfg, $volid_list);
1430 my (undef, $rootuid, $rootgid) = parse_id_maps
($conf);
1433 PVE
::LXC
::Config-
>foreach_volume($conf, sub {
1434 my ($ms, $mountpoint) = @_;
1436 $mountpoint->{ro
} = 0 if $ignore_ro;
1438 mountpoint_mount
($mountpoint, $rootdir, $storage_cfg, undef, $rootuid, $rootgid);
1442 warn "mounting container failed\n";
1443 umount_all
($vmid, $storage_cfg, $conf, 1);
1451 sub mountpoint_mount_path
{
1452 my ($mountpoint, $storage_cfg, $snapname) = @_;
1454 return mountpoint_mount
($mountpoint, undef, $storage_cfg, $snapname);
1462 if ($line =~ m
@^(/dev/loop\d
+):@) {
1466 my $cmd = ['losetup', '--associated', $path];
1467 PVE
::Tools
::run_command
($cmd, outfunc
=> $parser);
1471 # Run a function with a file attached to a loop device.
1472 # The loop device is always detached afterwards (or set to autoclear).
1473 # Returns the loop device.
1474 sub run_with_loopdev
{
1475 my ($func, $file, $readonly) = @_;
1476 my $device = query_loopdev
($file);
1477 # Try to reuse an existing device
1479 # We assume that whoever setup the loop device is responsible for
1487 if ($line =~ m
@^(/dev/loop\d
+)$@) {
1497 push @$losetup_cmd, '-r' if $readonly;
1498 PVE
::Tools
::run_command
($losetup_cmd, outfunc
=> $parser);
1499 die "failed to setup loop device for $file\n" if !$device;
1500 eval { &$func($device); };
1502 PVE
::Tools
::run_command
(['losetup', '-d', $device]);
1507 # In scalar mode: returns a file handle to the deepest directory node.
1508 # In list context: returns a list of:
1509 # * the deepest directory node
1510 # * the 2nd deepest directory (parent of the above)
1511 # * directory name of the last directory
1512 # So that the path $2/$3 should lead to $1 afterwards.
1513 sub walk_tree_nofollow
($$$;$$) {
1514 my ($start, $subdir, $mkdir, $rootuid, $rootgid) = @_;
1516 sysopen(my $fd, $start, O_PATH
| O_DIRECTORY
)
1517 or die "failed to open start directory $start: $!\n";
1519 return walk_tree_nofollow_fd
($start, $fd, $subdir, $mkdir, $rootuid, $rootgid);
1523 sub walk_tree_nofollow_fd
($$$$;$$) {
1524 my ($start_dirname, $start_fd, $subdir, $mkdir, $rootuid, $rootgid) = @_;
1526 # splitdir() returns '' for empty components including the leading /
1527 my @comps = grep { length($_)>0 } File
::Spec-
>splitdir($subdir);
1530 my $dir = $start_dirname;
1531 my $last_component = undef;
1533 foreach my $component (@comps) {
1534 $dir .= "/$component";
1535 my $next = PVE
::Tools
::openat
(fileno($fd), $component, O_NOFOLLOW
| O_DIRECTORY
);
1538 # failed, check for symlinks and try to create the path
1539 die "symlink encountered at: $dir\n" if $! == ELOOP
|| $! == ENOTDIR
;
1540 die "cannot open directory $dir: $!\n" if !$mkdir;
1542 # We don't check for errors on mkdirat() here and just try to
1543 # openat() again, since at least one error (EEXIST) is an
1544 # expected possibility if multiple containers start
1545 # simultaneously. If someone else injects a symlink now then
1546 # the subsequent openat() will fail due to O_NOFOLLOW anyway.
1547 PVE
::Tools
::mkdirat
(fileno($fd), $component, 0755);
1549 $next = PVE
::Tools
::openat
(fileno($fd), $component, O_NOFOLLOW
| O_DIRECTORY
);
1550 die "failed to create path: $dir: $!\n" if !$next;
1552 PVE
::Tools
::fchownat
(fileno($next), '', $rootuid, $rootgid, PVE
::Tools
::AT_EMPTY_PATH
)
1553 if defined($rootuid) && defined($rootgid);
1556 close $second if defined($last_component) && $second != $start_fd;
1557 $last_component = $component;
1562 return ($fd, defined($last_component) && $second, $last_component) if wantarray;
1563 close $second if defined($last_component) && $second != $start_fd;
1567 # To guard against symlink attack races against other currently running
1568 # containers with shared recursive bind mount hierarchies we prepare a
1569 # directory handle for the directory we're mounting over to verify the
1570 # mountpoint afterwards.
1571 sub __bindmount_prepare
{
1572 my ($hostroot, $dir) = @_;
1573 my $srcdh = walk_tree_nofollow
($hostroot, $dir, 0);
1577 # Assuming we mount to rootfs/a/b/c, verify with the directory handle to 'b'
1578 # ($parentfd) that 'b/c' (openat($parentfd, 'c')) really leads to the directory
1579 # we intended to bind mount.
1580 sub __bindmount_verify
{
1581 my ($srcdh, $parentfd, $last_dir, $ro) = @_;
1584 # Open the mount point path coming from the parent directory since the
1585 # filehandle we would have gotten as first result of walk_tree_nofollow
1586 # earlier is still a handle to the underlying directory instead of the
1588 $destdh = PVE
::Tools
::openat
(fileno($parentfd), $last_dir, PVE
::Tools
::O_PATH
| O_NOFOLLOW
| O_DIRECTORY
);
1589 die "failed to open mount point: $!\n" if !$destdh;
1592 # no separate function because 99% of the time it's the wrong thing to use.
1593 if (syscall(PVE
::Syscall
::faccessat
, fileno($destdh), $dot, &POSIX
::W_OK
, 0) != -1) {
1594 die "failed to mark bind mount read only\n";
1596 die "read-only check failed: $!\n" if $! != EROFS
;
1599 # For the rootfs we don't have a parentfd so we open the path directly.
1600 # Note that this means bindmounting any prefix of the host's
1601 # /var/lib/lxc/$vmid path into another container is considered a grave
1603 sysopen $destdh, $last_dir, O_PATH
| O_DIRECTORY
;
1604 die "failed to open mount point: $!\n" if !$destdh;
1607 my ($srcdev, $srcinode) = stat($srcdh);
1608 my ($dstdev, $dstinode) = stat($destdh);
1612 return ($srcdev == $dstdev && $srcinode == $dstinode);
1615 # Perform the actual bind mounting:
1616 sub __bindmount_do
{
1617 my ($dir, $dest, $ro, @extra_opts) = @_;
1618 PVE
::Tools
::run_command
(['mount', '-o', 'bind', @extra_opts, $dir, $dest]);
1620 eval { PVE
::Tools
::run_command
(['mount', '-o', 'bind,remount,ro', $dest]); };
1622 warn "bindmount error\n";
1623 # don't leave writable bind-mounts behind...
1624 PVE
::Tools
::run_command
(['umount', $dest]);
1631 my ($dir, $parentfd, $last_dir, $dest, $ro, @extra_opts) = @_;
1633 my $srcdh = __bindmount_prepare
('/', $dir);
1635 __bindmount_do
($dir, $dest, $ro, @extra_opts);
1637 if (!__bindmount_verify
($srcdh, $parentfd, $last_dir, $ro)) {
1638 PVE
::Tools
::run_command
(['umount', $dest]);
1639 die "detected mount path change at: $dir\n";
1643 # Cleanup $rootdir a bit (double and trailing slashes), build the mount path
1644 # from $rootdir and $mount and walk the path from $rootdir to the final
1645 # directory to check for symlinks.
1646 sub __mount_prepare_rootdir
{
1647 my ($rootdir, $mount, $rootuid, $rootgid) = @_;
1648 $rootdir =~ s!/+!/!g;
1649 $rootdir =~ s!/+$!!;
1650 my $mount_path = "$rootdir/$mount";
1651 my ($mpfd, $parentfd, $last_dir) = walk_tree_nofollow
($rootdir, $mount, 1, $rootuid, $rootgid);
1652 return ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir);
1655 # use $rootdir = undef to just return the corresponding mount path
1656 sub mountpoint_mount
{
1657 my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_;
1658 return __mountpoint_mount
($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, undef);
1661 sub mountpoint_stage
{
1662 my ($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_;
1663 my ($path, $loop, $dev) =
1664 __mountpoint_mount
($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid, 1);
1666 if (!defined($path)) {
1667 return undef if $! == ENOSYS
;
1668 die "failed to mount subvolume: $!\n";
1671 # We clone the mount point and leave it there in order to keep them connected to eg. loop
1672 # devices in case we're hotplugging (which would allow contaienrs to unmount the new mount
1675 my $fd = PVE
::Tools
::open_tree
(&AT_FDCWD
, $stage_dir, &OPEN_TREE_CLOEXEC
| &OPEN_TREE_CLONE
)
1676 or die "open_tree() on mount point failed: $!\n";
1678 return wantarray ?
($path, $loop, $dev, $fd) : $fd;
1681 sub mountpoint_insert_staged
{
1682 my ($mount_fd, $rootdir_fd, $mp_dir, $opt, $rootuid, $rootgid) = @_;
1684 if (!defined($rootdir_fd)) {
1685 sysopen($rootdir_fd, '.', O_PATH
| O_DIRECTORY
)
1686 or die "failed to open '.': $!\n";
1689 my $dest_fd = walk_tree_nofollow_fd
('/', $rootdir_fd, $mp_dir, 1, $rootuid, $rootgid);
1691 PVE
::Tools
::move_mount
(
1696 &MOVE_MOUNT_F_EMPTY_PATH
| &MOVE_MOUNT_T_EMPTY_PATH
,
1697 ) or die "failed to move '$opt' into container hierarchy: $!\n";
1700 # Use $stage_mount, $rootdir is treated as a temporary path to "stage" the file system. The user
1701 # can then open a file descriptor to it which can be used with the `move_mount` syscall.
1702 # Note that if the kernel does not support the new mount API, this will not perform any action
1703 # and return `undef` with $! = ENOSYS.
1704 sub __mountpoint_mount
{
1705 my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, $stage_mount) = @_;
1707 if (defined($stage_mount) && !PVE
::LXC
::Tools
::can_use_new_mount_api
()) {
1712 # When staging mount points we always mount to $rootdir directly (iow. as if `mp=/`).
1713 # This is required since __mount_prepare_rootdir() will return handles to the parent directory
1714 # which we use in __bindmount_verify()!
1715 my $mount = $stage_mount ?
'/': $mountpoint->{mp
};
1717 my $volid = $mountpoint->{volume
};
1718 my $type = $mountpoint->{type
};
1719 my $quota = !$snapname && !$mountpoint->{ro
} && $mountpoint->{quota
};
1722 return if !$volid || !$mount;
1727 my ($mpfd, $parentfd, $last_dir);
1729 if (defined($rootdir)) {
1730 ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir) =
1731 __mount_prepare_rootdir
($rootdir, $mount, $rootuid, $rootgid);
1734 if (defined($stage_mount)) {
1735 $mount_path = $rootdir;
1738 my ($storage, $volname) = PVE
::Storage
::parse_volume_id
($volid, 1);
1740 die "unknown snapshot path for '$volid'" if !$storage && defined($snapname);
1744 if (my $mountopts = $mountpoint->{mountoptions
}) {
1745 my @opts = split(/;/, $mountpoint->{mountoptions
});
1746 push @$optlist, grep { PVE
::LXC
::Config
::is_valid_mount_option
($_) } @opts;
1749 my $acl = $mountpoint->{acl
};
1750 if (defined($acl)) {
1751 push @$optlist, ($acl ?
'acl' : 'noacl');
1754 my $optstring = join(',', @$optlist);
1755 my $readonly = $mountpoint->{ro
};
1758 @extra_opts = ('-o', $optstring) if $optstring;
1762 my $scfg = PVE
::Storage
::storage_config
($storage_cfg, $storage);
1764 my $path = PVE
::Storage
::map_volume
($storage_cfg, $volid, $snapname);
1766 $path = PVE
::Storage
::path
($storage_cfg, $volid, $snapname) if !defined($path);
1768 my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1769 PVE
::Storage
::parse_volname
($storage_cfg, $volid);
1771 $format = 'iso' if $vtype eq 'iso'; # allow to handle iso files
1773 if ($format eq 'subvol') {
1775 my (undef, $name) = PVE
::Storage
::parse_volname
($storage_cfg, $volid);
1776 if (defined($snapname)) {
1777 $name .= "\@$snapname";
1778 if ($scfg->{type
} eq 'zfspool') {
1779 PVE
::Tools
::run_command
(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', "$scfg->{pool}/$name", $mount_path]);
1781 die "cannot mount subvol snapshots for storage type '$scfg->{type}'\n";
1784 if (defined($acl) && $scfg->{type
} eq 'zfspool') {
1785 my $acltype = ($acl ?
'acltype=posixacl' : 'acltype=noacl');
1786 PVE
::Tools
::run_command
(['zfs', 'set', $acltype, "$scfg->{pool}/$name"]);
1788 bindmount
($path, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts);
1789 warn "cannot enable quota control for bind mounted subvolumes\n" if $quota;
1792 return wantarray ?
($path, 0, undef) : $path;
1793 } elsif ($format eq 'raw' || $format eq 'iso') {
1794 # NOTE: 'mount' performs canonicalization without the '-c' switch, which for
1795 # device-mapper devices is special-cased to use the /dev/mapper symlinks.
1796 # Our autodev hook expects the /dev/dm-* device currently
1797 # and will create the /dev/mapper symlink accordingly
1798 $path = Cwd
::realpath
($path);
1799 die "failed to get device path\n" if !$path;
1800 ($path) = ($path =~ /^(.*)$/s); #untaint
1804 if ($format eq 'iso') {
1805 PVE
::Tools
::run_command
(['mount', '-o', 'ro', @extra_opts, $path, $mount_path]);
1806 } elsif ($isBase || defined($snapname)) {
1807 PVE
::Tools
::run_command
(['mount', '-o', 'ro,noload', @extra_opts, $path, $mount_path]);
1810 push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0';
1812 push @extra_opts, '-o', 'ro' if $readonly;
1813 PVE
::Tools
::run_command
(['mount', @extra_opts, $path, $mount_path]);
1817 my $use_loopdev = 0;
1818 if ($scfg->{content
}->{rootdir
}) {
1819 if ($scfg->{path
}) {
1820 $mounted_dev = run_with_loopdev
($domount, $path, $readonly);
1823 $mounted_dev = $path;
1827 die "storage '$storage' does not support containers\n";
1829 return wantarray ?
($path, $use_loopdev, $mounted_dev) : $path;
1831 die "unsupported image format '$format'\n";
1833 } elsif ($type eq 'device') {
1834 push @extra_opts, '-o', 'ro' if $readonly;
1835 push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0' if $quota;
1836 # See the NOTE above about devicemapper canonicalization
1837 my ($devpath) = (Cwd
::realpath
($volid) =~ /^(.*)$/s); # realpath() taints
1838 PVE
::Tools
::run_command
(['mount', @extra_opts, $volid, $mount_path]) if $mount_path;
1839 return wantarray ?
($volid, 0, $devpath) : $volid;
1840 } elsif ($type eq 'bind') {
1841 die "directory '$volid' does not exist\n" if ! -d
$volid;
1842 bindmount
($volid, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts) if $mount_path;
1843 warn "cannot enable quota control for bind mounts\n" if $quota;
1844 return wantarray ?
($volid, 0, undef) : $volid;
1847 die "unsupported storage";
1850 sub mountpoint_hotplug
:prototype($$$$$) {
1851 my ($vmid, $conf, $opt, $mp, $storage_cfg) = @_;
1853 my (undef, $rootuid, $rootgid) = PVE
::LXC
::parse_id_maps
($conf);
1855 # We do the rest in a fork with an unshared mount namespace, because:
1856 # -) change our papparmor profile to that of /usr/bin/lxc-start
1857 # -) we're now going to 'stage' # the mountpoint, then grab it, then move into the
1858 # container's namespace, then mount it.
1860 PVE
::Tools
::run_fork
(sub {
1861 # Pin the container pid longer, we also need to get its monitor/parent:
1862 my ($ct_pid, $ct_pidfd) = open_lxc_pid
($vmid)
1863 or die "failed to open pidfd of container $vmid\'s init process\n";
1865 my ($monitor_pid, $monitor_pidfd) = open_ppid
($ct_pid)
1866 or die "failed to open pidfd of container $vmid\'s monitor process\n";
1868 my $ct_mnt_ns = $get_container_namespace->($vmid, $ct_pid, 'mnt');
1869 my $monitor_mnt_ns = $get_container_namespace->($vmid, $monitor_pid, 'mnt');
1871 # Grab a file descriptor to our apparmor label file so we can change into the 'lxc-start'
1872 # profile to lower our privileges to the same level we have in the start hook:
1873 sysopen(my $aa_fd, "/proc/self/attr/current", O_WRONLY
)
1874 or die "failed to open '/proc/self/attr/current' for writing: $!\n";
1875 # But switch namespaces first, to make sure the namespace switches aren't blocked by
1878 # Change into the monitor's mount namespace. We "pin" the mount into the monitor's
1879 # namespace for it to remain active there since the container will be able to unmount
1880 # hotplugged mount points and thereby potentially free up loop devices, which is a security
1882 PVE
::Tools
::setns
(fileno($monitor_mnt_ns), PVE
::Tools
::CLONE_NEWNS
);
1884 or die "failed to change root directory within the monitor's mount namespace: $!\n";
1886 my $dir = get_staging_mount_path
($opt);
1888 # Now switch our apparmor profile before mounting:
1889 my $data = 'changeprofile /usr/bin/lxc-start';
1890 if (syswrite($aa_fd, $data, length($data)) != length($data)) {
1891 die "failed to change apparmor profile: $!\n";
1893 # Check errors on close as well:
1895 or die "failed to change apparmor profile (close() failed): $!\n";
1897 my $mount_fd = mountpoint_stage
($mp, $dir, $storage_cfg, undef, $rootuid, $rootgid);
1899 PVE
::Tools
::setns
(fileno($ct_mnt_ns), PVE
::Tools
::CLONE_NEWNS
);
1901 or die "failed to change root directory within the container's mount namespace: $!\n";
1903 mountpoint_insert_staged
($mount_fd, undef, $mp->{mp
}, $opt, $rootuid, $rootgid);
1907 # Create a directory in the mountpoint staging tempfs.
1908 sub get_staging_mount_path
($) {
1911 my $target = get_staging_tempfs
() . "/$opt";
1912 if (!mkdir($target) && $! != EEXIST
) {
1913 die "failed to create directory $target: $!\n";
1919 # Mount /run/pve/mountpoints as tmpfs
1920 sub get_staging_tempfs
() {
1921 # We choose a path in /var/lib/lxc/ here because the lxc-start apparmor profile restricts most
1923 my $target = '/var/lib/lxc/.pve-staged-mounts';
1924 if (!mkdir($target)) {
1925 return $target if $! == EEXIST
;
1926 die "failed to create directory $target: $!\n";
1929 PVE
::Tools
::mount
("none", $target, 'tmpfs', 0, "size=8k,mode=755")
1930 or die "failed to mount $target as tmpfs: $!\n";
1936 my ($dev, $rootuid, $rootgid) = @_;
1944 "root_owner=$rootuid:$rootgid",
1949 # a hack to print only the relevant stuff, i.e., the one which could help on repair
1950 if ($line =~ /^(Creating filesystem|Filesystem UUID|Superblock backups|\s+\d+, \d)/) {
1956 print STDERR
"$line\n" if $line && $line !~ /^mke2fs \d\.\d/;
1962 my ($storage_cfg, $volid, $rootuid, $rootgid) = @_;
1964 if ($volid =~ m!^/dev/.+!) {
1969 my ($storage, $volname) = PVE
::Storage
::parse_volume_id
($volid, 1);
1971 die "cannot format volume '$volid' with no storage\n" if !$storage;
1973 PVE
::Storage
::activate_volumes
($storage_cfg, [$volid]);
1975 my $path = PVE
::Storage
::map_volume
($storage_cfg, $volid);
1977 $path = PVE
::Storage
::path
($storage_cfg, $volid) if !defined($path);
1979 my ($vtype, undef, undef, undef, undef, $isBase, $format) =
1980 PVE
::Storage
::parse_volname
($storage_cfg, $volid);
1982 die "cannot format volume '$volid' (format == $format)\n"
1983 if $format ne 'raw';
1985 mkfs
($path, $rootuid, $rootgid);
1989 my ($storecfg, $vollist) = @_;
1991 foreach my $volid (@$vollist) {
1992 eval { PVE
::Storage
::vdisk_free
($storecfg, $volid); };
1998 my ($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid) = @_;
2000 my $needs_chown = 0;
2003 my $scfg = PVE
::Storage
::storage_config
($storecfg, $storage);
2004 # fixme: use better naming ct-$vmid-disk-X.raw?
2008 if ($scfg->{content
}->{rootdir
} && $scfg->{path
}) {
2009 if ($size_kb > 0 && !($scfg->{type
} eq 'btrfs' && $scfg->{quotas
})) {
2010 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
2013 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'subvol', undef, $size_kb);
2016 } elsif ($scfg->{type
} eq 'zfspool') {
2017 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'subvol', undef, $size_kb);
2019 } elsif ($scfg->{content
}->{rootdir
}) {
2020 $volid = PVE
::Storage
::vdisk_alloc
($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
2023 die "content type 'rootdir' is not available or configured on storage '$storage'\n";
2025 format_disk
($storecfg, $volid, $rootuid, $rootgid) if $do_format;
2028 # in case formatting got interrupted:
2029 if (defined($volid)) {
2030 eval { PVE
::Storage
::vdisk_free
($storecfg, $volid); };
2036 return ($volid, $needs_chown);
2040 my ($storecfg, $vmid, $settings, $conf, $pending) = @_;
2045 my (undef, $rootuid, $rootgid) = PVE
::LXC
::parse_id_maps
($conf);
2046 my $chown_vollist = [];
2048 PVE
::LXC
::Config-
>foreach_volume($settings, sub {
2049 my ($ms, $mountpoint) = @_;
2051 my $volid = $mountpoint->{volume
};
2052 my $mp = $mountpoint->{mp
};
2054 my ($storage, $volname) = PVE
::Storage
::parse_volume_id
($volid, 1);
2056 if ($storage && ($volid =~ $NEW_DISK_RE)) {
2057 my ($storeid, $size_gb) = ($1, $2);
2059 my $size_kb = int(${size_gb
}*1024) * 1024;
2061 my $needs_chown = 0;
2062 ($volid, $needs_chown) = alloc_disk
($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid);
2063 push @$chown_vollist, $volid if $needs_chown;
2064 push @$vollist, $volid;
2065 $mountpoint->{volume
} = $volid;
2066 $mountpoint->{size
} = $size_kb * 1024;
2068 $conf->{pending
}->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
2070 $conf->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
2073 # use specified/existing volid/dir/device
2074 $conf->{$ms} = PVE
::LXC
::Config-
>print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
2078 PVE
::Storage
::activate_volumes
($storecfg, $chown_vollist, undef);
2079 foreach my $volid (@$chown_vollist) {
2080 my $path = PVE
::Storage
::path
($storecfg, $volid, undef);
2081 chown($rootuid, $rootgid, $path);
2083 PVE
::Storage
::deactivate_volumes
($storecfg, $chown_vollist, undef);
2085 # free allocated images on error
2087 destroy_disks
($storecfg, $vollist);
2093 sub update_disksize
{
2094 my ($vmid, $conf, $all_volumes) = @_;
2097 my $prefix = "CT $vmid:";
2099 my $update_mp = sub {
2100 my ($key, $mp, @param) = @_;
2101 my $size = $all_volumes->{$mp->{volume
}}->{size
} // 0;
2103 if (!defined($mp->{size
}) || $size != $mp->{size
}) {
2105 print "$prefix updated volume size of '$mp->{volume}' in config.\n";
2106 $mp->{size
} = $size;
2107 my $no_mp = $key eq 'rootfs'; # rootfs is handled different from other mount points
2108 $conf->{$key} = PVE
::LXC
::Config-
>print_ct_mountpoint($mp, $no_mp);
2112 PVE
::LXC
::Config-
>foreach_volume($conf, $update_mp);
2118 my ($vmid, $conf, $all_volumes) = @_;
2121 my $prefix = "CT $vmid:";
2123 # Note: it is allowed to define multiple storage entries with the same path
2124 # (alias), so we need to check both 'volid' and real 'path' (two different
2125 # volid can point to the same path).
2127 # used and unused disks
2131 foreach my $opt (keys %$conf) {
2132 next if ($opt !~ m/^unused\d+$/);
2133 my $vol = $all_volumes->{$conf->{$opt}};
2134 $refpath->{$vol->{path
}} = $vol->{volid
};
2137 foreach my $key (keys %$all_volumes) {
2138 my $vol = $all_volumes->{$key};
2139 my $in_use = PVE
::LXC
::Config-
>is_volume_in_use($conf, $vol->{volid
});
2140 my $path = $vol->{path
};
2143 $refpath->{$path} = $key;
2144 delete $orphans->{$path};
2146 if ((!$orphans->{$path}) && (!$refpath->{$path})) {
2147 $orphans->{$path} = $key;
2152 for my $key (keys %$orphans) {
2153 my $disk = $orphans->{$key};
2154 my $unused = PVE
::LXC
::Config-
>add_unused_volume($conf, $disk);
2158 print "$prefix add unreferenced volume '$disk' as '$unused' to config.\n";
2166 my ($cfg, $vmid) = @_;
2168 my $info = PVE
::Storage
::vdisk_list
($cfg, undef, $vmid, undef, 'rootdir');
2170 my $all_volumes = {};
2171 foreach my $storeid (keys %$info) {
2172 foreach my $item (@{$info->{$storeid}}) {
2173 my $volid = $item->{volid
};
2174 next if !($volid && $item->{size
});
2175 $item->{path
} = PVE
::Storage
::path
($cfg, $volid);
2176 $all_volumes->{$volid} = $item;
2180 return $all_volumes;
2184 my ($vmid, $nolock, $dryrun) = @_;
2186 my $cfg = PVE
::Storage
::config
();
2188 print "rescan volumes...\n";
2189 my $all_volumes = scan_volids
($cfg, $vmid);
2191 my $updatefn = sub {
2195 my $conf = PVE
::LXC
::Config-
>load_config($vmid);
2197 PVE
::LXC
::Config-
>check_lock($conf);
2200 foreach my $volid (keys %$all_volumes) {
2201 my $info = $all_volumes->{$volid};
2202 $vm_volids->{$volid} = $info if $info->{vmid
} == $vmid;
2205 my $upu = update_unused
($vmid, $conf, $vm_volids);
2206 my $upd = update_disksize
($vmid, $conf, $vm_volids);
2207 $changes = $upu || $upd;
2209 PVE
::LXC
::Config-
>write_config($vmid, $conf) if $changes && !$dryrun;
2212 if (defined($vmid)) {
2216 PVE
::LXC
::Config-
>lock_config($vmid, $updatefn, $vmid);
2219 my $vmlist = config_list
();
2220 foreach my $vmid (keys %$vmlist) {
2224 PVE
::LXC
::Config-
>lock_config($vmid, $updatefn, $vmid);
2231 # bash completion helper
2233 sub complete_os_templates
{
2234 my ($cmdname, $pname, $cvalue) = @_;
2236 my $cfg = PVE
::Storage
::config
();
2240 if ($cvalue =~ m/^([^:]+):/) {
2244 my $vtype = $cmdname eq 'restore' ?
'backup' : 'vztmpl';
2245 my $data = PVE
::Storage
::template_list
($cfg, $storeid, $vtype);
2248 foreach my $id (keys %$data) {
2249 foreach my $item (@{$data->{$id}}) {
2250 push @$res, $item->{volid
} if defined($item->{volid
});
2257 my $complete_ctid_full = sub {
2260 my $idlist = vmstatus
();
2262 my $active_hash = list_active_containers
();
2266 foreach my $id (keys %$idlist) {
2267 my $d = $idlist->{$id};
2268 if (defined($running)) {
2269 next if $d->{template
};
2270 next if $running && !$active_hash->{$id};
2271 next if !$running && $active_hash->{$id};
2280 return &$complete_ctid_full();
2283 sub complete_ctid_stopped
{
2284 return &$complete_ctid_full(0);
2287 sub complete_ctid_running
{
2288 return &$complete_ctid_full(1);
2298 my $lxc = $conf->{lxc
};
2299 foreach my $entry (@$lxc) {
2300 my ($key, $value) = @$entry;
2301 # FIXME: remove the 'id_map' variant when lxc-3.0 arrives
2302 next if $key ne 'lxc.idmap' && $key ne 'lxc.id_map';
2303 if ($value =~ /^([ug])\s+(\d+)\s+(\d+)\s+(\d+)\s*$/) {
2304 my ($type, $ct, $host, $length) = ($1, $2, $3, $4);
2305 push @$id_map, [$type, $ct, $host, $length];
2307 $rootuid = $host if $type eq 'u';
2308 $rootgid = $host if $type eq 'g';
2311 die "failed to parse idmap: $value\n";
2315 if (!@$id_map && $conf->{unprivileged
}) {
2316 # Should we read them from /etc/subuid?
2317 $id_map = [ ['u', '0', '100000', '65536'],
2318 ['g', '0', '100000', '65536'] ];
2319 $rootuid = $rootgid = 100000;
2322 return ($id_map, $rootuid, $rootgid);
2325 sub userns_command
{
2328 return ['lxc-usernsexec', (map { ('-m', join(':', @$_)) } @$id_map), '--'];
2333 my sub print_ct_stderr_log
{
2335 my $log = eval { file_get_contents
("/run/pve/ct-$vmid.stderr") };
2338 while ($log =~ /^\h*(lxc-start:?\s+$vmid:?\s*\S+\s*)?(.*?)\h*$/gm) {
2340 print STDERR
"$line\n";
2343 my sub print_ct_warn_log
{
2345 my $log_fn = "/run/pve/ct-$vmid.warnings";
2346 my $log = eval { file_get_contents
($log_fn) };
2349 while ($log =~ /^\h*\s*(.*?)\h*$/gm) {
2350 PVE
::RESTEnvironment
::log_warn
($1);
2352 unlink $log_fn or warn "could not unlink '$log_fn' - $!\n";
2355 my sub monitor_state_change
($$) {
2356 my ($monitor_socket, $vmid) = @_;
2357 die "no monitor socket\n" if !defined($monitor_socket);
2360 my ($type, $name, $value) = PVE
::LXC
::Monitor
::read_lxc_message
($monitor_socket);
2362 die "monitor socket: got EOF\n" if !defined($type);
2364 next if $name ne "$vmid" || $type ne 'STATE';
2366 if ($value eq PVE
::LXC
::Monitor
::STATE_STARTING
) {
2367 alarm(0); # don't timeout after seeing the starting state
2368 } elsif ($value eq PVE
::LXC
::Monitor
::STATE_ABORTING
||
2369 $value eq PVE
::LXC
::Monitor
::STATE_STOPPING
||
2370 $value eq PVE
::LXC
::Monitor
::STATE_STOPPED
) {
2372 } elsif ($value eq PVE
::LXC
::Monitor
::STATE_RUNNING
) {
2375 warn "unexpected message from monitor socket - " .
2376 "type: '$type' - value: '$value'\n";
2380 my sub monitor_start
($$) {
2381 my ($monitor_socket, $vmid) = @_;
2383 my $success = eval {
2384 PVE
::Tools
::run_with_timeout
(10, \
&monitor_state_change
, $monitor_socket, $vmid)
2387 warn "problem with monitor socket, but continuing anyway: $err\n";
2388 } elsif (!$success) {
2389 print_ct_stderr_log
($vmid);
2390 die "startup for container '$vmid' failed\n";
2395 my ($vmid, $conf, $skiplock, $debug) = @_;
2397 # apply pending changes while starting
2398 if (scalar(keys %{$conf->{pending
}})) {
2399 my $storecfg = PVE
::Storage
::config
();
2400 PVE
::LXC
::Config-
>vmconfig_apply_pending($vmid, $conf, $storecfg);
2401 PVE
::LXC
::Config-
>write_config($vmid, $conf);
2402 $conf = PVE
::LXC
::Config-
>load_config($vmid); # update/reload
2405 update_lxc_config
($vmid, $conf);
2407 my $skiplock_flag_fn = "/run/lxc/skiplock-$vmid";
2410 open(my $fh, '>', $skiplock_flag_fn) || die "failed to open $skiplock_flag_fn for writing: $!\n";
2414 my $storage_cfg = PVE
::Storage
::config
();
2415 my $vollist = PVE
::LXC
::Config-
>get_vm_volumes($conf);
2417 PVE
::Storage
::activate_volumes
($storage_cfg, $vollist);
2419 my $monitor_socket = eval { PVE
::LXC
::Monitor
::get_monitor_socket
() };
2422 unlink "/run/pve/ct-$vmid.stderr"; # systemd does not truncate log files
2424 my $is_debug = $debug || (!defined($debug) && $conf->{debug
});
2425 my $base_unit = $is_debug ?
'pve-container-debug' : 'pve-container';
2427 my $cmd = ['systemctl', 'start', "$base_unit\@$vmid"];
2429 PVE
::GuestHelpers
::exec_hookscript
($conf, $vmid, 'pre-start', 1);
2433 monitor_start
($monitor_socket, $vmid) if defined($monitor_socket);
2435 # if debug is requested, print the log it also when the start succeeded
2436 print_ct_stderr_log
($vmid) if $is_debug;
2438 print_ct_warn_log
($vmid); # always print warn log, if any
2441 unlink $skiplock_flag_fn;
2444 PVE
::GuestHelpers
::exec_hookscript
($conf, $vmid, 'post-start');
2449 # Helper to stop a container completely and make sure it has stopped completely.
2450 # This is necessary because we want the post-stop hook to have completed its
2451 # unmount-all step, but post-stop happens after lxc puts the container into the
2453 # $kill - if true it will always do an immediate hard-stop
2454 # $shutdown_timeout - the timeout to wait for a gracefull shutdown
2455 # $kill_after_timeout - if true, send a hardstop if shutdown timed out
2457 my ($vmid, $kill, $shutdown_timeout, $kill_after_timeout) = @_;
2459 # Open the container's command socket.
2460 my $path = "\0/var/lib/lxc/$vmid/command";
2461 my $sock = IO
::Socket
::UNIX-
>new(
2462 Type
=> SOCK_STREAM
(),
2466 return if $! == ECONNREFUSED
; # The container is not running
2467 die "failed to open container ${vmid}'s command socket: $!\n";
2470 my $conf = PVE
::LXC
::Config-
>load_config($vmid);
2471 PVE
::GuestHelpers
::exec_hookscript
($conf, $vmid, 'pre-stop');
2473 # Stop the container:
2475 my $cmd = ['lxc-stop', '-n', $vmid];
2478 push @$cmd, '--kill'; # doesn't allow timeouts
2480 # lxc-stop uses a default timeout
2481 push @$cmd, '--nokill' if !$kill_after_timeout;
2483 if (defined($shutdown_timeout)) {
2484 push @$cmd, '--timeout', $shutdown_timeout;
2485 # Give run_command 5 extra seconds
2486 $shutdown_timeout += 5;
2490 eval { run_command
($cmd, timeout
=> $shutdown_timeout) };
2492 # Wait until the command socket is closed.
2493 # In case the lxc-stop call failed, reading from the command socket may block forever,
2494 # so poll with another timeout to avoid freezing the shutdown task.
2498 my $poll = IO
::Poll-
>new();
2499 $poll->mask($sock => POLLIN
| POLLHUP
); # watch for input and EOF events
2500 $poll->poll($shutdown_timeout); # IO::Poll timeout is in seconds
2501 return if ($poll->events($sock) & POLLHUP
);
2503 my $result = <$sock>;
2504 return if !defined $result; # monitor is gone and the ct has stopped.
2507 die "container did not stop\n";
2511 my ($vmid, $timeout, $skiplock) = @_;
2513 PVE
::LXC
::Config-
>lock_config($vmid, sub {
2514 return if !check_running
($vmid);
2516 vm_stop
($vmid, 0, $timeout, 1); # kill if timeout exceeds
2518 my $conf = PVE
::LXC
::Config-
>load_config($vmid);
2519 vm_start
($vmid, $conf);
2526 return PVE
::Tools
::run_fork
(sub {
2527 # Unshare the mount namespace
2528 die "failed to unshare mount namespace: $!\n"
2529 if !PVE
::Tools
::unshare
(PVE
::Tools
::CLONE_NEWNS
);
2530 run_command
(['mount', '--make-rslave', '/']);
2535 my $copy_volume = sub {
2536 my ($src_volid, $src, $dst_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid) = @_;
2538 my $src_mp = { volume
=> $src_volid, mp
=> '/', ro
=> 1 };
2539 $src_mp->{type
} = PVE
::LXC
::Config-
>classify_mountpoint($src_volid);
2541 my $dst_mp = { volume
=> $dst_volid, mp
=> '/', ro
=> 0 };
2542 $dst_mp->{type
} = PVE
::LXC
::Config-
>classify_mountpoint($dst_volid);
2548 mountpoint_mount
($src_mp, $src, $storage_cfg, $snapname, $rootuid, $rootgid);
2549 push @mounted, $src;
2551 mountpoint_mount
($dst_mp, $dest, $storage_cfg, undef, $rootuid, $rootgid);
2552 push @mounted, $dest;
2565 '--one-file-system',
2566 "--bwlimit=$bwlimit",
2573 # Wait for rsync's children to release dest so that
2574 # consequent file operations (umount, remove) are possible
2575 while ((system {"fuser"} "fuser", "-s", $dest) == 0) {sleep 1};
2577 foreach my $mount (reverse @mounted) {
2578 eval { run_command
(['/bin/umount', $mount], errfunc
=> sub{})};
2579 warn "Can't umount $mount\n" if $@;
2582 # If this fails they're used as mount points in a concurrent operation
2583 # (which should not happen but there's also no real need to get rid of them).
2590 # Should not be called after unsharing the mount namespace!
2592 my ($mp, $vmid, $storage, $storage_cfg, $conf, $snapname, $bwlimit) = @_;
2594 die "cannot copy volumes of type $mp->{type}\n" if $mp->{type
} ne 'volume';
2595 File
::Path
::make_path
("/var/lib/lxc/$vmid");
2596 my $dest = "/var/lib/lxc/$vmid/.copy-volume-1";
2597 my $src = "/var/lib/lxc/$vmid/.copy-volume-2";
2599 # get id's for unprivileged container
2600 my (undef, $rootuid, $rootgid) = parse_id_maps
($conf);
2602 # Allocate the disk before unsharing in order to make sure zfs subvolumes
2603 # are visible in this namespace, otherwise the host only sees the empty
2604 # (not-mounted) directory.
2607 # Make sure $mp contains a correct size.
2608 $mp->{size
} = PVE
::Storage
::volume_size_info
($storage_cfg, $mp->{volume
});
2610 ($new_volid, $needs_chown) = alloc_disk
($storage_cfg, $vmid, $storage, $mp->{size
}/1024, $rootuid, $rootgid);
2612 PVE
::Storage
::activate_volumes
($storage_cfg, [$new_volid], undef);
2613 my $path = PVE
::Storage
::path
($storage_cfg, $new_volid, undef);
2614 chown($rootuid, $rootgid, $path);
2618 $copy_volume->($mp->{volume
}, $src, $new_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid);
2622 PVE
::Storage
::vdisk_free
($storage_cfg, $new_volid)
2623 if defined($new_volid);
2630 sub get_lxc_version
() {
2632 run_command
([qw(lxc-start --version)], outfunc
=> sub {
2634 # We only parse out major & minor version numbers.
2635 if ($line =~ /^(\d+)\.(\d+)(?:\D.*)?$/) {
2636 $version = [$1, $2];
2640 die "failed to get lxc version\n" if !defined($version);
2643 return $version->@*;
2648 if (PVE
::CGroup
::cgroup_mode
() == 2) {
2649 PVE
::LXC
::Command
::freeze
($vmid, 30);
2651 PVE
::LXC
::CGroup-
>new($vmid)->freeze_thaw(1);
2657 if (PVE
::CGroup
::cgroup_mode
() == 2) {
2658 PVE
::LXC
::Command
::unfreeze
($vmid, 30);
2660 PVE
::LXC
::CGroup-
>new($vmid)->freeze_thaw(0);