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1 | package PVE::LXC; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
6 | use POSIX qw(EINTR); | |
7 | ||
8 | use Socket; | |
9 | ||
10 | use File::Path; | |
11 | use File::Spec; | |
12 | use Cwd qw(); | |
13 | use Fcntl qw(O_RDONLY O_NOFOLLOW O_DIRECTORY); | |
14 | use Errno qw(ELOOP ENOTDIR EROFS ECONNREFUSED); | |
15 | use IO::Socket::UNIX; | |
16 | ||
17 | use PVE::Exception qw(raise_perm_exc); | |
18 | use PVE::Storage; | |
19 | use PVE::SafeSyslog; | |
20 | use PVE::INotify; | |
21 | use PVE::Tools qw($IPV6RE $IPV4RE dir_glob_foreach lock_file lock_file_full O_PATH); | |
22 | use PVE::CpuSet; | |
23 | use PVE::Network; | |
24 | use PVE::AccessControl; | |
25 | use PVE::ProcFSTools; | |
26 | use PVE::Syscall; | |
27 | use PVE::LXC::Config; | |
28 | use Time::HiRes qw (gettimeofday); | |
29 | ||
30 | my $nodename = PVE::INotify::nodename(); | |
31 | ||
32 | my $cpuinfo= PVE::ProcFSTools::read_cpuinfo(); | |
33 | ||
34 | sub config_list { | |
35 | my $vmlist = PVE::Cluster::get_vmlist(); | |
36 | my $res = {}; | |
37 | return $res if !$vmlist || !$vmlist->{ids}; | |
38 | my $ids = $vmlist->{ids}; | |
39 | ||
40 | foreach my $vmid (keys %$ids) { | |
41 | next if !$vmid; # skip CT0 | |
42 | my $d = $ids->{$vmid}; | |
43 | next if !$d->{node} || $d->{node} ne $nodename; | |
44 | next if !$d->{type} || $d->{type} ne 'lxc'; | |
45 | $res->{$vmid}->{type} = 'lxc'; | |
46 | } | |
47 | return $res; | |
48 | } | |
49 | ||
50 | sub destroy_config { | |
51 | my ($vmid) = @_; | |
52 | ||
53 | unlink PVE::LXC::Config->config_file($vmid, $nodename); | |
54 | } | |
55 | ||
56 | # container status helpers | |
57 | ||
58 | sub list_active_containers { | |
59 | ||
60 | my $filename = "/proc/net/unix"; | |
61 | ||
62 | # similar test is used by lcxcontainers.c: list_active_containers | |
63 | my $res = {}; | |
64 | ||
65 | my $fh = IO::File->new ($filename, "r"); | |
66 | return $res if !$fh; | |
67 | ||
68 | while (defined(my $line = <$fh>)) { | |
69 | if ($line =~ m/^[a-f0-9]+:\s+\S+\s+\S+\s+\S+\s+\S+\s+\S+\s+\d+\s+(\S+)$/) { | |
70 | my $path = $1; | |
71 | if ($path =~ m!^@/var/lib/lxc/(\d+)/command$!) { | |
72 | $res->{$1} = 1; | |
73 | } | |
74 | } | |
75 | } | |
76 | ||
77 | close($fh); | |
78 | ||
79 | return $res; | |
80 | } | |
81 | ||
82 | # warning: this is slow | |
83 | sub check_running { | |
84 | my ($vmid) = @_; | |
85 | ||
86 | my $active_hash = list_active_containers(); | |
87 | ||
88 | return 1 if defined($active_hash->{$vmid}); | |
89 | ||
90 | return undef; | |
91 | } | |
92 | ||
93 | sub get_container_disk_usage { | |
94 | my ($vmid, $pid) = @_; | |
95 | ||
96 | return PVE::Tools::df("/proc/$pid/root/", 1); | |
97 | } | |
98 | ||
99 | my $last_proc_vmid_stat; | |
100 | ||
101 | my $parse_cpuacct_stat = sub { | |
102 | my ($vmid, $unprivileged) = @_; | |
103 | ||
104 | my $raw = read_cgroup_value('cpuacct', $vmid, $unprivileged, 'cpuacct.stat', 1); | |
105 | ||
106 | my $stat = {}; | |
107 | ||
108 | if ($raw =~ m/^user (\d+)\nsystem (\d+)\n/) { | |
109 | ||
110 | $stat->{utime} = $1; | |
111 | $stat->{stime} = $2; | |
112 | ||
113 | } | |
114 | ||
115 | return $stat; | |
116 | }; | |
117 | ||
118 | sub vmstatus { | |
119 | my ($opt_vmid) = @_; | |
120 | ||
121 | my $list = $opt_vmid ? { $opt_vmid => { type => 'lxc' }} : config_list(); | |
122 | ||
123 | my $active_hash = list_active_containers(); | |
124 | ||
125 | my $cpucount = $cpuinfo->{cpus} || 1; | |
126 | ||
127 | my $cdtime = gettimeofday; | |
128 | ||
129 | my $uptime = (PVE::ProcFSTools::read_proc_uptime(1))[0]; | |
130 | my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK); | |
131 | ||
132 | my $unprivileged = {}; | |
133 | ||
134 | foreach my $vmid (keys %$list) { | |
135 | my $d = $list->{$vmid}; | |
136 | ||
137 | eval { $d->{pid} = find_lxc_pid($vmid) if defined($active_hash->{$vmid}); }; | |
138 | warn $@ if $@; # ignore errors (consider them stopped) | |
139 | ||
140 | $d->{status} = $d->{pid} ? 'running' : 'stopped'; | |
141 | ||
142 | my $cfspath = PVE::LXC::Config->cfs_config_path($vmid); | |
143 | my $conf = PVE::Cluster::cfs_read_file($cfspath) || {}; | |
144 | ||
145 | $unprivileged->{$vmid} = $conf->{unprivileged}; | |
146 | ||
147 | $d->{name} = $conf->{'hostname'} || "CT$vmid"; | |
148 | $d->{name} =~ s/[\s]//g; | |
149 | ||
150 | $d->{cpus} = $conf->{cores} || $conf->{cpulimit}; | |
151 | $d->{cpus} = $cpucount if !$d->{cpus}; | |
152 | ||
153 | $d->{lock} = $conf->{lock} || ''; | |
154 | ||
155 | if ($d->{pid}) { | |
156 | my $res = get_container_disk_usage($vmid, $d->{pid}); | |
157 | $d->{disk} = $res->{used}; | |
158 | $d->{maxdisk} = $res->{total}; | |
159 | } else { | |
160 | $d->{disk} = 0; | |
161 | # use 4GB by default ?? | |
162 | if (my $rootfs = $conf->{rootfs}) { | |
163 | my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($rootfs); | |
164 | $d->{maxdisk} = $rootinfo->{size} || (4*1024*1024*1024); | |
165 | } else { | |
166 | $d->{maxdisk} = 4*1024*1024*1024; | |
167 | } | |
168 | } | |
169 | ||
170 | $d->{mem} = 0; | |
171 | $d->{swap} = 0; | |
172 | $d->{maxmem} = ($conf->{memory}||512)*1024*1024; | |
173 | $d->{maxswap} = ($conf->{swap}//0)*1024*1024; | |
174 | ||
175 | $d->{uptime} = 0; | |
176 | $d->{cpu} = 0; | |
177 | ||
178 | $d->{netout} = 0; | |
179 | $d->{netin} = 0; | |
180 | ||
181 | $d->{diskread} = 0; | |
182 | $d->{diskwrite} = 0; | |
183 | ||
184 | $d->{template} = PVE::LXC::Config->is_template($conf); | |
185 | } | |
186 | ||
187 | foreach my $vmid (keys %$list) { | |
188 | my $d = $list->{$vmid}; | |
189 | my $pid = $d->{pid}; | |
190 | ||
191 | next if !$pid; # skip stopped CTs | |
192 | ||
193 | my $proc_pid_stat = PVE::ProcFSTools::read_proc_pid_stat($pid); | |
194 | $d->{uptime} = int(($uptime - $proc_pid_stat->{starttime}) / $clock_ticks); # the method lxcfs uses | |
195 | ||
196 | my $unpriv = $unprivileged->{$vmid}; | |
197 | ||
198 | my $memory_stat = read_cgroup_list('memory', $vmid, $unpriv, 'memory.stat'); | |
199 | my $mem_usage_in_bytes = read_cgroup_value('memory', $vmid, $unpriv, 'memory.usage_in_bytes'); | |
200 | ||
201 | $d->{mem} = $mem_usage_in_bytes - $memory_stat->{total_cache}; | |
202 | $d->{swap} = read_cgroup_value('memory', $vmid, $unpriv, 'memory.memsw.usage_in_bytes') - $mem_usage_in_bytes; | |
203 | ||
204 | my $blkio_bytes = read_cgroup_value('blkio', $vmid, $unpriv, 'blkio.throttle.io_service_bytes', 1); | |
205 | my @bytes = split(/\n/, $blkio_bytes); | |
206 | foreach my $byte (@bytes) { | |
207 | if (my ($key, $value) = $byte =~ /(Read|Write)\s+(\d+)/) { | |
208 | $d->{diskread} += $2 if $key eq 'Read'; | |
209 | $d->{diskwrite} += $2 if $key eq 'Write'; | |
210 | } | |
211 | } | |
212 | ||
213 | my $pstat = $parse_cpuacct_stat->($vmid, $unpriv); | |
214 | ||
215 | my $used = $pstat->{utime} + $pstat->{stime}; | |
216 | ||
217 | my $old = $last_proc_vmid_stat->{$vmid}; | |
218 | if (!$old) { | |
219 | $last_proc_vmid_stat->{$vmid} = { | |
220 | time => $cdtime, | |
221 | used => $used, | |
222 | cpu => 0, | |
223 | }; | |
224 | next; | |
225 | } | |
226 | ||
227 | my $dtime = ($cdtime - $old->{time}) * $cpucount * $cpuinfo->{user_hz}; | |
228 | ||
229 | if ($dtime > 1000) { | |
230 | my $dutime = $used - $old->{used}; | |
231 | ||
232 | $d->{cpu} = (($dutime/$dtime)* $cpucount) / $d->{cpus}; | |
233 | $last_proc_vmid_stat->{$vmid} = { | |
234 | time => $cdtime, | |
235 | used => $used, | |
236 | cpu => $d->{cpu}, | |
237 | }; | |
238 | } else { | |
239 | $d->{cpu} = $old->{cpu}; | |
240 | } | |
241 | } | |
242 | ||
243 | my $netdev = PVE::ProcFSTools::read_proc_net_dev(); | |
244 | ||
245 | foreach my $dev (keys %$netdev) { | |
246 | next if $dev !~ m/^veth([1-9]\d*)i/; | |
247 | my $vmid = $1; | |
248 | my $d = $list->{$vmid}; | |
249 | ||
250 | next if !$d; | |
251 | ||
252 | $d->{netout} += $netdev->{$dev}->{receive}; | |
253 | $d->{netin} += $netdev->{$dev}->{transmit}; | |
254 | ||
255 | } | |
256 | ||
257 | return $list; | |
258 | } | |
259 | ||
260 | sub read_cgroup_list($$$$) { | |
261 | my ($group, $vmid, $unprivileged, $name) = @_; | |
262 | ||
263 | my $content = read_cgroup_value($group, $vmid, $unprivileged, $name, 1); | |
264 | ||
265 | return { split(/\s+/, $content) }; | |
266 | } | |
267 | ||
268 | sub read_cgroup_value($$$$$) { | |
269 | my ($group, $vmid, $unprivileged, $name, $full) = @_; | |
270 | ||
271 | my $nsdir = $unprivileged ? '' : 'ns/'; | |
272 | my $path = "/sys/fs/cgroup/$group/lxc/$vmid/${nsdir}$name"; | |
273 | ||
274 | return PVE::Tools::file_get_contents($path) if $full; | |
275 | ||
276 | return PVE::Tools::file_read_firstline($path); | |
277 | } | |
278 | ||
279 | sub write_cgroup_value { | |
280 | my ($group, $vmid, $name, $value) = @_; | |
281 | ||
282 | my $path = "/sys/fs/cgroup/$group/lxc/$vmid/$name"; | |
283 | PVE::ProcFSTools::write_proc_entry($path, $value) if -e $path; | |
284 | ||
285 | } | |
286 | ||
287 | sub find_lxc_console_pids { | |
288 | ||
289 | my $res = {}; | |
290 | ||
291 | PVE::Tools::dir_glob_foreach('/proc', '\d+', sub { | |
292 | my ($pid) = @_; | |
293 | ||
294 | my $cmdline = PVE::Tools::file_read_firstline("/proc/$pid/cmdline"); | |
295 | return if !$cmdline; | |
296 | ||
297 | my @args = split(/\0/, $cmdline); | |
298 | ||
299 | # search for lxc-console -n <vmid> | |
300 | return if scalar(@args) != 3; | |
301 | return if $args[1] ne '-n'; | |
302 | return if $args[2] !~ m/^\d+$/; | |
303 | return if $args[0] !~ m|^(/usr/bin/)?lxc-console$|; | |
304 | ||
305 | my $vmid = $args[2]; | |
306 | ||
307 | push @{$res->{$vmid}}, $pid; | |
308 | }); | |
309 | ||
310 | return $res; | |
311 | } | |
312 | ||
313 | sub find_lxc_pid { | |
314 | my ($vmid) = @_; | |
315 | ||
316 | my $pid = undef; | |
317 | my $parser = sub { | |
318 | my $line = shift; | |
319 | $pid = $1 if $line =~ m/^PID:\s+(\d+)$/; | |
320 | }; | |
321 | PVE::Tools::run_command(['lxc-info', '-n', $vmid, '-p'], outfunc => $parser); | |
322 | ||
323 | die "unable to get PID for CT $vmid (not running?)\n" if !$pid; | |
324 | ||
325 | return $pid; | |
326 | } | |
327 | ||
328 | # Note: we cannot use Net:IP, because that only allows strict | |
329 | # CIDR networks | |
330 | sub parse_ipv4_cidr { | |
331 | my ($cidr, $noerr) = @_; | |
332 | ||
333 | if ($cidr =~ m!^($IPV4RE)(?:/(\d+))$! && ($2 > 7) && ($2 <= 32)) { | |
334 | return { address => $1, netmask => $PVE::Network::ipv4_reverse_mask->[$2] }; | |
335 | } | |
336 | ||
337 | return undef if $noerr; | |
338 | ||
339 | die "unable to parse ipv4 address/mask\n"; | |
340 | } | |
341 | ||
342 | ||
343 | sub update_lxc_config { | |
344 | my ($vmid, $conf) = @_; | |
345 | ||
346 | my $dir = "/var/lib/lxc/$vmid"; | |
347 | ||
348 | if ($conf->{template}) { | |
349 | ||
350 | unlink "$dir/config"; | |
351 | ||
352 | return; | |
353 | } | |
354 | ||
355 | my $raw = ''; | |
356 | ||
357 | die "missing 'arch' - internal error" if !$conf->{arch}; | |
358 | $raw .= "lxc.arch = $conf->{arch}\n"; | |
359 | ||
360 | my $unprivileged = $conf->{unprivileged}; | |
361 | my $custom_idmap = grep { $_->[0] eq 'lxc.idmap' } @{$conf->{lxc}}; | |
362 | ||
363 | my $ostype = $conf->{ostype} || die "missing 'ostype' - internal error"; | |
364 | ||
365 | my $cfgpath = '/usr/share/lxc/config'; | |
366 | my $inc = "$cfgpath/$ostype.common.conf"; | |
367 | $inc ="$cfgpath/common.conf" if !-f $inc; | |
368 | $raw .= "lxc.include = $inc\n"; | |
369 | if ($unprivileged || $custom_idmap) { | |
370 | $inc = "$cfgpath/$ostype.userns.conf"; | |
371 | $inc = "$cfgpath/userns.conf" if !-f $inc; | |
372 | $raw .= "lxc.include = $inc\n"; | |
373 | $raw .= "lxc.seccomp.profile = $cfgpath/pve-userns.seccomp\n"; | |
374 | } | |
375 | ||
376 | # WARNING: DO NOT REMOVE this without making sure that loop device nodes | |
377 | # cannot be exposed to the container with r/w access (cgroup perms). | |
378 | # When this is enabled mounts will still remain in the monitor's namespace | |
379 | # after the container unmounted them and thus will not detach from their | |
380 | # files while the container is running! | |
381 | $raw .= "lxc.monitor.unshare = 1\n"; | |
382 | ||
383 | # Should we read them from /etc/subuid? | |
384 | if ($unprivileged && !$custom_idmap) { | |
385 | $raw .= "lxc.idmap = u 0 100000 65536\n"; | |
386 | $raw .= "lxc.idmap = g 0 100000 65536\n"; | |
387 | } | |
388 | ||
389 | if (!PVE::LXC::Config->has_dev_console($conf)) { | |
390 | $raw .= "lxc.console.path = none\n"; | |
391 | $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n"; | |
392 | } | |
393 | ||
394 | my $ttycount = PVE::LXC::Config->get_tty_count($conf); | |
395 | $raw .= "lxc.tty.max = $ttycount\n"; | |
396 | ||
397 | # some init scripts expect a linux terminal (turnkey). | |
398 | $raw .= "lxc.environment = TERM=linux\n"; | |
399 | ||
400 | my $utsname = $conf->{hostname} || "CT$vmid"; | |
401 | $raw .= "lxc.uts.name = $utsname\n"; | |
402 | ||
403 | my $memory = $conf->{memory} || 512; | |
404 | my $swap = $conf->{swap} // 0; | |
405 | ||
406 | my $lxcmem = int($memory*1024*1024); | |
407 | $raw .= "lxc.cgroup.memory.limit_in_bytes = $lxcmem\n"; | |
408 | ||
409 | my $lxcswap = int(($memory + $swap)*1024*1024); | |
410 | $raw .= "lxc.cgroup.memory.memsw.limit_in_bytes = $lxcswap\n"; | |
411 | ||
412 | if (my $cpulimit = $conf->{cpulimit}) { | |
413 | $raw .= "lxc.cgroup.cpu.cfs_period_us = 100000\n"; | |
414 | my $value = int(100000*$cpulimit); | |
415 | $raw .= "lxc.cgroup.cpu.cfs_quota_us = $value\n"; | |
416 | } | |
417 | ||
418 | my $shares = $conf->{cpuunits} || 1024; | |
419 | $raw .= "lxc.cgroup.cpu.shares = $shares\n"; | |
420 | ||
421 | die "missing 'rootfs' configuration\n" | |
422 | if !defined($conf->{rootfs}); | |
423 | ||
424 | my $mountpoint = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs}); | |
425 | ||
426 | $raw .= "lxc.rootfs.path = $dir/rootfs\n"; | |
427 | ||
428 | foreach my $k (sort keys %$conf) { | |
429 | next if $k !~ m/^net(\d+)$/; | |
430 | my $ind = $1; | |
431 | my $d = PVE::LXC::Config->parse_lxc_network($conf->{$k}); | |
432 | $raw .= "lxc.net.$ind.type = veth\n"; | |
433 | $raw .= "lxc.net.$ind.veth.pair = veth${vmid}i${ind}\n"; | |
434 | $raw .= "lxc.net.$ind.hwaddr = $d->{hwaddr}\n" if defined($d->{hwaddr}); | |
435 | $raw .= "lxc.net.$ind.name = $d->{name}\n" if defined($d->{name}); | |
436 | $raw .= "lxc.net.$ind.mtu = $d->{mtu}\n" if defined($d->{mtu}); | |
437 | } | |
438 | ||
439 | my $had_cpuset = 0; | |
440 | if (my $lxcconf = $conf->{lxc}) { | |
441 | foreach my $entry (@$lxcconf) { | |
442 | my ($k, $v) = @$entry; | |
443 | $had_cpuset = 1 if $k eq 'lxc.cgroup.cpuset.cpus'; | |
444 | $raw .= "$k = $v\n"; | |
445 | } | |
446 | } | |
447 | ||
448 | my $cores = $conf->{cores}; | |
449 | if (!$had_cpuset && $cores) { | |
450 | my $cpuset = eval { PVE::CpuSet->new_from_cgroup('lxc', 'effective_cpus') }; | |
451 | $cpuset = PVE::CpuSet->new_from_cgroup('', 'effective_cpus') if !$cpuset; | |
452 | my @members = $cpuset->members(); | |
453 | while (scalar(@members) > $cores) { | |
454 | my $randidx = int(rand(scalar(@members))); | |
455 | $cpuset->delete($members[$randidx]); | |
456 | splice(@members, $randidx, 1); # keep track of the changes | |
457 | } | |
458 | $raw .= "lxc.cgroup.cpuset.cpus = ".$cpuset->short_string()."\n"; | |
459 | } | |
460 | ||
461 | File::Path::mkpath("$dir/rootfs"); | |
462 | ||
463 | PVE::Tools::file_set_contents("$dir/config", $raw); | |
464 | } | |
465 | ||
466 | # verify and cleanup nameserver list (replace \0 with ' ') | |
467 | sub verify_nameserver_list { | |
468 | my ($nameserver_list) = @_; | |
469 | ||
470 | my @list = (); | |
471 | foreach my $server (PVE::Tools::split_list($nameserver_list)) { | |
472 | PVE::JSONSchema::pve_verify_ip($server); | |
473 | push @list, $server; | |
474 | } | |
475 | ||
476 | return join(' ', @list); | |
477 | } | |
478 | ||
479 | sub verify_searchdomain_list { | |
480 | my ($searchdomain_list) = @_; | |
481 | ||
482 | my @list = (); | |
483 | foreach my $server (PVE::Tools::split_list($searchdomain_list)) { | |
484 | # todo: should we add checks for valid dns domains? | |
485 | push @list, $server; | |
486 | } | |
487 | ||
488 | return join(' ', @list); | |
489 | } | |
490 | ||
491 | sub get_console_command { | |
492 | my ($vmid, $conf, $noescapechar) = @_; | |
493 | ||
494 | my $cmode = PVE::LXC::Config->get_cmode($conf); | |
495 | ||
496 | my $cmd = []; | |
497 | if ($cmode eq 'console') { | |
498 | push @$cmd, 'lxc-console', '-n', $vmid, '-t', 0; | |
499 | push @$cmd, '-e', -1 if $noescapechar; | |
500 | } elsif ($cmode eq 'tty') { | |
501 | push @$cmd, 'lxc-console', '-n', $vmid; | |
502 | push @$cmd, '-e', -1 if $noescapechar; | |
503 | } elsif ($cmode eq 'shell') { | |
504 | push @$cmd, 'lxc-attach', '--clear-env', '-n', $vmid; | |
505 | } else { | |
506 | die "internal error"; | |
507 | } | |
508 | ||
509 | return $cmd; | |
510 | } | |
511 | ||
512 | sub get_primary_ips { | |
513 | my ($conf) = @_; | |
514 | ||
515 | # return data from net0 | |
516 | ||
517 | return undef if !defined($conf->{net0}); | |
518 | my $net = PVE::LXC::Config->parse_lxc_network($conf->{net0}); | |
519 | ||
520 | my $ipv4 = $net->{ip}; | |
521 | if ($ipv4) { | |
522 | if ($ipv4 =~ /^(dhcp|manual)$/) { | |
523 | $ipv4 = undef | |
524 | } else { | |
525 | $ipv4 =~ s!/\d+$!!; | |
526 | } | |
527 | } | |
528 | my $ipv6 = $net->{ip6}; | |
529 | if ($ipv6) { | |
530 | if ($ipv6 =~ /^(auto|dhcp|manual)$/) { | |
531 | $ipv6 = undef; | |
532 | } else { | |
533 | $ipv6 =~ s!/\d+$!!; | |
534 | } | |
535 | } | |
536 | ||
537 | return ($ipv4, $ipv6); | |
538 | } | |
539 | ||
540 | sub delete_mountpoint_volume { | |
541 | my ($storage_cfg, $vmid, $volume) = @_; | |
542 | ||
543 | return if PVE::LXC::Config->classify_mountpoint($volume) ne 'volume'; | |
544 | ||
545 | my ($vtype, $name, $owner) = PVE::Storage::parse_volname($storage_cfg, $volume); | |
546 | PVE::Storage::vdisk_free($storage_cfg, $volume) if $vmid == $owner; | |
547 | } | |
548 | ||
549 | sub destroy_lxc_container { | |
550 | my ($storage_cfg, $vmid, $conf, $replacement_conf) = @_; | |
551 | ||
552 | PVE::LXC::Config->foreach_mountpoint($conf, sub { | |
553 | my ($ms, $mountpoint) = @_; | |
554 | delete_mountpoint_volume($storage_cfg, $vmid, $mountpoint->{volume}); | |
555 | }); | |
556 | ||
557 | rmdir "/var/lib/lxc/$vmid/rootfs"; | |
558 | unlink "/var/lib/lxc/$vmid/config"; | |
559 | rmdir "/var/lib/lxc/$vmid"; | |
560 | if (defined $replacement_conf) { | |
561 | PVE::LXC::Config->write_config($vmid, $replacement_conf); | |
562 | } else { | |
563 | destroy_config($vmid); | |
564 | } | |
565 | ||
566 | #my $cmd = ['lxc-destroy', '-n', $vmid ]; | |
567 | #PVE::Tools::run_command($cmd); | |
568 | } | |
569 | ||
570 | sub vm_stop_cleanup { | |
571 | my ($storage_cfg, $vmid, $conf, $keepActive) = @_; | |
572 | ||
573 | eval { | |
574 | if (!$keepActive) { | |
575 | ||
576 | my $vollist = PVE::LXC::Config->get_vm_volumes($conf); | |
577 | PVE::Storage::deactivate_volumes($storage_cfg, $vollist); | |
578 | } | |
579 | }; | |
580 | warn $@ if $@; # avoid errors - just warn | |
581 | } | |
582 | ||
583 | my $safe_num_ne = sub { | |
584 | my ($a, $b) = @_; | |
585 | ||
586 | return 0 if !defined($a) && !defined($b); | |
587 | return 1 if !defined($a); | |
588 | return 1 if !defined($b); | |
589 | ||
590 | return $a != $b; | |
591 | }; | |
592 | ||
593 | my $safe_string_ne = sub { | |
594 | my ($a, $b) = @_; | |
595 | ||
596 | return 0 if !defined($a) && !defined($b); | |
597 | return 1 if !defined($a); | |
598 | return 1 if !defined($b); | |
599 | ||
600 | return $a ne $b; | |
601 | }; | |
602 | ||
603 | sub update_net { | |
604 | my ($vmid, $conf, $opt, $newnet, $netid, $rootdir) = @_; | |
605 | ||
606 | if ($newnet->{type} ne 'veth') { | |
607 | # for when there are physical interfaces | |
608 | die "cannot update interface of type $newnet->{type}"; | |
609 | } | |
610 | ||
611 | my $veth = "veth${vmid}i${netid}"; | |
612 | my $eth = $newnet->{name}; | |
613 | ||
614 | if (my $oldnetcfg = $conf->{$opt}) { | |
615 | my $oldnet = PVE::LXC::Config->parse_lxc_network($oldnetcfg); | |
616 | ||
617 | if (&$safe_string_ne($oldnet->{hwaddr}, $newnet->{hwaddr}) || | |
618 | &$safe_string_ne($oldnet->{name}, $newnet->{name})) { | |
619 | ||
620 | PVE::Network::veth_delete($veth); | |
621 | delete $conf->{$opt}; | |
622 | PVE::LXC::Config->write_config($vmid, $conf); | |
623 | ||
624 | hotplug_net($vmid, $conf, $opt, $newnet, $netid); | |
625 | ||
626 | } else { | |
627 | if (&$safe_string_ne($oldnet->{bridge}, $newnet->{bridge}) || | |
628 | &$safe_num_ne($oldnet->{tag}, $newnet->{tag}) || | |
629 | &$safe_num_ne($oldnet->{firewall}, $newnet->{firewall})) { | |
630 | ||
631 | if ($oldnet->{bridge}) { | |
632 | PVE::Network::tap_unplug($veth); | |
633 | foreach (qw(bridge tag firewall)) { | |
634 | delete $oldnet->{$_}; | |
635 | } | |
636 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet); | |
637 | PVE::LXC::Config->write_config($vmid, $conf); | |
638 | } | |
639 | ||
640 | PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}); | |
641 | # This includes the rate: | |
642 | foreach (qw(bridge tag firewall rate)) { | |
643 | $oldnet->{$_} = $newnet->{$_} if $newnet->{$_}; | |
644 | } | |
645 | } elsif (&$safe_string_ne($oldnet->{rate}, $newnet->{rate})) { | |
646 | # Rate can be applied on its own but any change above needs to | |
647 | # include the rate in tap_plug since OVS resets everything. | |
648 | PVE::Network::tap_rate_limit($veth, $newnet->{rate}); | |
649 | $oldnet->{rate} = $newnet->{rate} | |
650 | } | |
651 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet); | |
652 | PVE::LXC::Config->write_config($vmid, $conf); | |
653 | } | |
654 | } else { | |
655 | hotplug_net($vmid, $conf, $opt, $newnet, $netid); | |
656 | } | |
657 | ||
658 | update_ipconfig($vmid, $conf, $opt, $eth, $newnet, $rootdir); | |
659 | } | |
660 | ||
661 | sub hotplug_net { | |
662 | my ($vmid, $conf, $opt, $newnet, $netid) = @_; | |
663 | ||
664 | my $veth = "veth${vmid}i${netid}"; | |
665 | my $vethpeer = $veth . "p"; | |
666 | my $eth = $newnet->{name}; | |
667 | ||
668 | PVE::Network::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr}); | |
669 | PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}); | |
670 | ||
671 | # attach peer in container | |
672 | my $cmd = ['lxc-device', '-n', $vmid, 'add', $vethpeer, "$eth" ]; | |
673 | PVE::Tools::run_command($cmd); | |
674 | ||
675 | # link up peer in container | |
676 | $cmd = ['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', '/sbin/ip', 'link', 'set', $eth ,'up' ]; | |
677 | PVE::Tools::run_command($cmd); | |
678 | ||
679 | my $done = { type => 'veth' }; | |
680 | foreach (qw(bridge tag firewall hwaddr name)) { | |
681 | $done->{$_} = $newnet->{$_} if $newnet->{$_}; | |
682 | } | |
683 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($done); | |
684 | ||
685 | PVE::LXC::Config->write_config($vmid, $conf); | |
686 | } | |
687 | ||
688 | sub update_ipconfig { | |
689 | my ($vmid, $conf, $opt, $eth, $newnet, $rootdir) = @_; | |
690 | ||
691 | my $lxc_setup = PVE::LXC::Setup->new($conf, $rootdir); | |
692 | ||
693 | my $optdata = PVE::LXC::Config->parse_lxc_network($conf->{$opt}); | |
694 | my $deleted = []; | |
695 | my $added = []; | |
696 | my $nscmd = sub { | |
697 | my $cmdargs = shift; | |
698 | PVE::Tools::run_command(['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', @_], %$cmdargs); | |
699 | }; | |
700 | my $ipcmd = sub { &$nscmd({}, '/sbin/ip', @_) }; | |
701 | ||
702 | my $change_ip_config = sub { | |
703 | my ($ipversion) = @_; | |
704 | ||
705 | my $family_opt = "-$ipversion"; | |
706 | my $suffix = $ipversion == 4 ? '' : $ipversion; | |
707 | my $gw= "gw$suffix"; | |
708 | my $ip= "ip$suffix"; | |
709 | ||
710 | my $newip = $newnet->{$ip}; | |
711 | my $newgw = $newnet->{$gw}; | |
712 | my $oldip = $optdata->{$ip}; | |
713 | ||
714 | my $change_ip = &$safe_string_ne($oldip, $newip); | |
715 | my $change_gw = &$safe_string_ne($optdata->{$gw}, $newgw); | |
716 | ||
717 | return if !$change_ip && !$change_gw; | |
718 | ||
719 | # step 1: add new IP, if this fails we cancel | |
720 | my $is_real_ip = ($newip && $newip !~ /^(?:auto|dhcp|manual)$/); | |
721 | if ($change_ip && $is_real_ip) { | |
722 | eval { &$ipcmd($family_opt, 'addr', 'add', $newip, 'dev', $eth); }; | |
723 | if (my $err = $@) { | |
724 | warn $err; | |
725 | return; | |
726 | } | |
727 | } | |
728 | ||
729 | # step 2: replace gateway | |
730 | # If this fails we delete the added IP and cancel. | |
731 | # If it succeeds we save the config and delete the old IP, ignoring | |
732 | # errors. The config is then saved. | |
733 | # Note: 'ip route replace' can add | |
734 | if ($change_gw) { | |
735 | if ($newgw) { | |
736 | eval { | |
737 | if ($is_real_ip && !PVE::Network::is_ip_in_cidr($newgw, $newip, $ipversion)) { | |
738 | &$ipcmd($family_opt, 'route', 'add', $newgw, 'dev', $eth); | |
739 | } | |
740 | &$ipcmd($family_opt, 'route', 'replace', 'default', 'via', $newgw); | |
741 | }; | |
742 | if (my $err = $@) { | |
743 | warn $err; | |
744 | # the route was not replaced, the old IP is still available | |
745 | # rollback (delete new IP) and cancel | |
746 | if ($change_ip) { | |
747 | eval { &$ipcmd($family_opt, 'addr', 'del', $newip, 'dev', $eth); }; | |
748 | warn $@ if $@; # no need to die here | |
749 | } | |
750 | return; | |
751 | } | |
752 | } else { | |
753 | eval { &$ipcmd($family_opt, 'route', 'del', 'default'); }; | |
754 | # if the route was not deleted, the guest might have deleted it manually | |
755 | # warn and continue | |
756 | warn $@ if $@; | |
757 | } | |
758 | } | |
759 | ||
760 | # from this point on we save the configuration | |
761 | # step 3: delete old IP ignoring errors | |
762 | if ($change_ip && $oldip && $oldip !~ /^(?:auto|dhcp)$/) { | |
763 | # We need to enable promote_secondaries, otherwise our newly added | |
764 | # address will be removed along with the old one. | |
765 | my $promote = 0; | |
766 | eval { | |
767 | if ($ipversion == 4) { | |
768 | &$nscmd({ outfunc => sub { $promote = int(shift) } }, | |
769 | 'cat', "/proc/sys/net/ipv4/conf/$eth/promote_secondaries"); | |
770 | &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=1"); | |
771 | } | |
772 | &$ipcmd($family_opt, 'addr', 'del', $oldip, 'dev', $eth); | |
773 | }; | |
774 | warn $@ if $@; # no need to die here | |
775 | ||
776 | if ($ipversion == 4) { | |
777 | &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=$promote"); | |
778 | } | |
779 | } | |
780 | ||
781 | foreach my $property ($ip, $gw) { | |
782 | if ($newnet->{$property}) { | |
783 | $optdata->{$property} = $newnet->{$property}; | |
784 | } else { | |
785 | delete $optdata->{$property}; | |
786 | } | |
787 | } | |
788 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($optdata); | |
789 | PVE::LXC::Config->write_config($vmid, $conf); | |
790 | $lxc_setup->setup_network($conf); | |
791 | }; | |
792 | ||
793 | &$change_ip_config(4); | |
794 | &$change_ip_config(6); | |
795 | ||
796 | } | |
797 | ||
798 | my $enter_namespace = sub { | |
799 | my ($vmid, $pid, $which, $type) = @_; | |
800 | sysopen my $fd, "/proc/$pid/ns/$which", O_RDONLY | |
801 | or die "failed to open $which namespace of container $vmid: $!\n"; | |
802 | PVE::Tools::setns(fileno($fd), $type) | |
803 | or die "failed to enter $which namespace of container $vmid: $!\n"; | |
804 | close $fd; | |
805 | }; | |
806 | ||
807 | my $do_syncfs = sub { | |
808 | my ($vmid, $pid, $socket) = @_; | |
809 | ||
810 | &$enter_namespace($vmid, $pid, 'mnt', PVE::Tools::CLONE_NEWNS); | |
811 | ||
812 | # Tell the parent process to start reading our /proc/mounts | |
813 | print {$socket} "go\n"; | |
814 | $socket->flush(); | |
815 | ||
816 | # Receive /proc/self/mounts | |
817 | my $mountdata = do { local $/ = undef; <$socket> }; | |
818 | close $socket; | |
819 | ||
820 | # Now sync all mountpoints... | |
821 | my $mounts = PVE::ProcFSTools::parse_mounts($mountdata); | |
822 | foreach my $mp (@$mounts) { | |
823 | my ($what, $dir, $fs) = @$mp; | |
824 | next if $fs eq 'fuse.lxcfs'; | |
825 | eval { PVE::Tools::sync_mountpoint($dir); }; | |
826 | warn $@ if $@; | |
827 | } | |
828 | }; | |
829 | ||
830 | sub sync_container_namespace { | |
831 | my ($vmid) = @_; | |
832 | my $pid = find_lxc_pid($vmid); | |
833 | ||
834 | # SOCK_DGRAM is nicer for barriers but cannot be slurped | |
835 | socketpair my $pfd, my $cfd, AF_UNIX, SOCK_STREAM, PF_UNSPEC | |
836 | or die "failed to create socketpair: $!\n"; | |
837 | ||
838 | my $child = fork(); | |
839 | die "fork failed: $!\n" if !defined($child); | |
840 | ||
841 | if (!$child) { | |
842 | eval { | |
843 | close $pfd; | |
844 | &$do_syncfs($vmid, $pid, $cfd); | |
845 | }; | |
846 | if (my $err = $@) { | |
847 | warn $err; | |
848 | POSIX::_exit(1); | |
849 | } | |
850 | POSIX::_exit(0); | |
851 | } | |
852 | close $cfd; | |
853 | my $go = <$pfd>; | |
854 | die "failed to enter container namespace\n" if $go ne "go\n"; | |
855 | ||
856 | open my $mounts, '<', "/proc/$child/mounts" | |
857 | or die "failed to open container's /proc/mounts: $!\n"; | |
858 | my $mountdata = do { local $/ = undef; <$mounts> }; | |
859 | close $mounts; | |
860 | print {$pfd} $mountdata; | |
861 | close $pfd; | |
862 | ||
863 | while (waitpid($child, 0) != $child) {} | |
864 | die "failed to sync container namespace\n" if $? != 0; | |
865 | } | |
866 | ||
867 | sub template_create { | |
868 | my ($vmid, $conf) = @_; | |
869 | ||
870 | my $storecfg = PVE::Storage::config(); | |
871 | ||
872 | my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs}); | |
873 | my $volid = $rootinfo->{volume}; | |
874 | ||
875 | die "Template feature is not available for '$volid'\n" | |
876 | if !PVE::Storage::volume_has_feature($storecfg, 'template', $volid); | |
877 | ||
878 | PVE::Storage::activate_volumes($storecfg, [$volid]); | |
879 | ||
880 | my $template_volid = PVE::Storage::vdisk_create_base($storecfg, $volid); | |
881 | $rootinfo->{volume} = $template_volid; | |
882 | $conf->{rootfs} = PVE::LXC::Config->print_ct_mountpoint($rootinfo, 1); | |
883 | ||
884 | PVE::LXC::Config->write_config($vmid, $conf); | |
885 | } | |
886 | ||
887 | sub check_ct_modify_config_perm { | |
888 | my ($rpcenv, $authuser, $vmid, $pool, $newconf, $delete) = @_; | |
889 | ||
890 | return 1 if $authuser eq 'root@pam'; | |
891 | ||
892 | my $check = sub { | |
893 | my ($opt, $delete) = @_; | |
894 | if ($opt eq 'cores' || $opt eq 'cpuunits' || $opt eq 'cpulimit') { | |
895 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.CPU']); | |
896 | } elsif ($opt eq 'rootfs' || $opt =~ /^mp\d+$/) { | |
897 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk']); | |
898 | return if $delete; | |
899 | my $data = $opt eq 'rootfs' ? PVE::LXC::Config->parse_ct_rootfs($newconf->{$opt}) | |
900 | : PVE::LXC::Config->parse_ct_mountpoint($newconf->{$opt}); | |
901 | raise_perm_exc("mount point type $data->{type} is only allowed for root\@pam") | |
902 | if $data->{type} ne 'volume'; | |
903 | } elsif ($opt eq 'memory' || $opt eq 'swap') { | |
904 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Memory']); | |
905 | } elsif ($opt =~ m/^net\d+$/ || $opt eq 'nameserver' || | |
906 | $opt eq 'searchdomain' || $opt eq 'hostname') { | |
907 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Network']); | |
908 | } else { | |
909 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Options']); | |
910 | } | |
911 | }; | |
912 | ||
913 | foreach my $opt (keys %$newconf) { | |
914 | &$check($opt, 0); | |
915 | } | |
916 | foreach my $opt (@$delete) { | |
917 | &$check($opt, 1); | |
918 | } | |
919 | ||
920 | return 1; | |
921 | } | |
922 | ||
923 | sub umount_all { | |
924 | my ($vmid, $storage_cfg, $conf, $noerr) = @_; | |
925 | ||
926 | my $rootdir = "/var/lib/lxc/$vmid/rootfs"; | |
927 | my $volid_list = PVE::LXC::Config->get_vm_volumes($conf); | |
928 | ||
929 | PVE::LXC::Config->foreach_mountpoint_reverse($conf, sub { | |
930 | my ($ms, $mountpoint) = @_; | |
931 | ||
932 | my $volid = $mountpoint->{volume}; | |
933 | my $mount = $mountpoint->{mp}; | |
934 | ||
935 | return if !$volid || !$mount; | |
936 | ||
937 | my $mount_path = "$rootdir/$mount"; | |
938 | $mount_path =~ s!/+!/!g; | |
939 | ||
940 | return if !PVE::ProcFSTools::is_mounted($mount_path); | |
941 | ||
942 | eval { | |
943 | PVE::Tools::run_command(['umount', '-d', $mount_path]); | |
944 | }; | |
945 | if (my $err = $@) { | |
946 | if ($noerr) { | |
947 | warn $err; | |
948 | } else { | |
949 | die $err; | |
950 | } | |
951 | } | |
952 | }); | |
953 | } | |
954 | ||
955 | sub mount_all { | |
956 | my ($vmid, $storage_cfg, $conf, $ignore_ro) = @_; | |
957 | ||
958 | my $rootdir = "/var/lib/lxc/$vmid/rootfs"; | |
959 | File::Path::make_path($rootdir); | |
960 | ||
961 | my $volid_list = PVE::LXC::Config->get_vm_volumes($conf); | |
962 | PVE::Storage::activate_volumes($storage_cfg, $volid_list); | |
963 | ||
964 | eval { | |
965 | PVE::LXC::Config->foreach_mountpoint($conf, sub { | |
966 | my ($ms, $mountpoint) = @_; | |
967 | ||
968 | $mountpoint->{ro} = 0 if $ignore_ro; | |
969 | ||
970 | mountpoint_mount($mountpoint, $rootdir, $storage_cfg); | |
971 | }); | |
972 | }; | |
973 | if (my $err = $@) { | |
974 | warn "mounting container failed\n"; | |
975 | umount_all($vmid, $storage_cfg, $conf, 1); | |
976 | die $err; | |
977 | } | |
978 | ||
979 | return $rootdir; | |
980 | } | |
981 | ||
982 | ||
983 | sub mountpoint_mount_path { | |
984 | my ($mountpoint, $storage_cfg, $snapname) = @_; | |
985 | ||
986 | return mountpoint_mount($mountpoint, undef, $storage_cfg, $snapname); | |
987 | } | |
988 | ||
989 | sub query_loopdev { | |
990 | my ($path) = @_; | |
991 | my $found; | |
992 | my $parser = sub { | |
993 | my $line = shift; | |
994 | if ($line =~ m@^(/dev/loop\d+):@) { | |
995 | $found = $1; | |
996 | } | |
997 | }; | |
998 | my $cmd = ['losetup', '--associated', $path]; | |
999 | PVE::Tools::run_command($cmd, outfunc => $parser); | |
1000 | return $found; | |
1001 | } | |
1002 | ||
1003 | # Run a function with a file attached to a loop device. | |
1004 | # The loop device is always detached afterwards (or set to autoclear). | |
1005 | # Returns the loop device. | |
1006 | sub run_with_loopdev { | |
1007 | my ($func, $file) = @_; | |
1008 | my $device = query_loopdev($file); | |
1009 | # Try to reuse an existing device | |
1010 | if ($device) { | |
1011 | # We assume that whoever setup the loop device is responsible for | |
1012 | # detaching it. | |
1013 | &$func($device); | |
1014 | return $device; | |
1015 | } | |
1016 | ||
1017 | my $parser = sub { | |
1018 | my $line = shift; | |
1019 | if ($line =~ m@^(/dev/loop\d+)$@) { | |
1020 | $device = $1; | |
1021 | } | |
1022 | }; | |
1023 | PVE::Tools::run_command(['losetup', '--show', '-f', $file], outfunc => $parser); | |
1024 | die "failed to setup loop device for $file\n" if !$device; | |
1025 | eval { &$func($device); }; | |
1026 | my $err = $@; | |
1027 | PVE::Tools::run_command(['losetup', '-d', $device]); | |
1028 | die $err if $err; | |
1029 | return $device; | |
1030 | } | |
1031 | ||
1032 | # In scalar mode: returns a file handle to the deepest directory node. | |
1033 | # In list context: returns a list of: | |
1034 | # * the deepest directory node | |
1035 | # * the 2nd deepest directory (parent of the above) | |
1036 | # * directory name of the last directory | |
1037 | # So that the path $2/$3 should lead to $1 afterwards. | |
1038 | sub walk_tree_nofollow($$$) { | |
1039 | my ($start, $subdir, $mkdir) = @_; | |
1040 | ||
1041 | # splitdir() returns '' for empty components including the leading / | |
1042 | my @comps = grep { length($_)>0 } File::Spec->splitdir($subdir); | |
1043 | ||
1044 | sysopen(my $fd, $start, O_PATH | O_DIRECTORY) | |
1045 | or die "failed to open start directory $start: $!\n"; | |
1046 | ||
1047 | my $dir = $start; | |
1048 | my $last_component = undef; | |
1049 | my $second = $fd; | |
1050 | foreach my $component (@comps) { | |
1051 | $dir .= "/$component"; | |
1052 | my $next = PVE::Tools::openat(fileno($fd), $component, O_NOFOLLOW | O_DIRECTORY); | |
1053 | ||
1054 | if (!$next) { | |
1055 | # failed, check for symlinks and try to create the path | |
1056 | die "symlink encountered at: $dir\n" if $! == ELOOP || $! == ENOTDIR; | |
1057 | die "cannot open directory $dir: $!\n" if !$mkdir; | |
1058 | ||
1059 | # We don't check for errors on mkdirat() here and just try to | |
1060 | # openat() again, since at least one error (EEXIST) is an | |
1061 | # expected possibility if multiple containers start | |
1062 | # simultaneously. If someone else injects a symlink now then | |
1063 | # the subsequent openat() will fail due to O_NOFOLLOW anyway. | |
1064 | PVE::Tools::mkdirat(fileno($fd), $component, 0755); | |
1065 | ||
1066 | $next = PVE::Tools::openat(fileno($fd), $component, O_NOFOLLOW | O_DIRECTORY); | |
1067 | die "failed to create path: $dir: $!\n" if !$next; | |
1068 | } | |
1069 | ||
1070 | close $second if defined($last_component); | |
1071 | $last_component = $component; | |
1072 | $second = $fd; | |
1073 | $fd = $next; | |
1074 | } | |
1075 | ||
1076 | return ($fd, defined($last_component) && $second, $last_component) if wantarray; | |
1077 | close $second if defined($last_component); | |
1078 | return $fd; | |
1079 | } | |
1080 | ||
1081 | # To guard against symlink attack races against other currently running | |
1082 | # containers with shared recursive bind mount hierarchies we prepare a | |
1083 | # directory handle for the directory we're mounting over to verify the | |
1084 | # mountpoint afterwards. | |
1085 | sub __bindmount_prepare { | |
1086 | my ($hostroot, $dir) = @_; | |
1087 | my $srcdh = walk_tree_nofollow($hostroot, $dir, 0); | |
1088 | return $srcdh; | |
1089 | } | |
1090 | ||
1091 | # Assuming we mount to rootfs/a/b/c, verify with the directory handle to 'b' | |
1092 | # ($parentfd) that 'b/c' (openat($parentfd, 'c')) really leads to the directory | |
1093 | # we intended to bind mount. | |
1094 | sub __bindmount_verify { | |
1095 | my ($srcdh, $parentfd, $last_dir, $ro) = @_; | |
1096 | my $destdh; | |
1097 | if ($parentfd) { | |
1098 | # Open the mount point path coming from the parent directory since the | |
1099 | # filehandle we would have gotten as first result of walk_tree_nofollow | |
1100 | # earlier is still a handle to the underlying directory instead of the | |
1101 | # mounted path. | |
1102 | $destdh = PVE::Tools::openat(fileno($parentfd), $last_dir, PVE::Tools::O_PATH | O_NOFOLLOW | O_DIRECTORY); | |
1103 | die "failed to open mount point: $!\n" if !$destdh; | |
1104 | if ($ro) { | |
1105 | my $dot = '.'; | |
1106 | # no separate function because 99% of the time it's the wrong thing to use. | |
1107 | if (syscall(PVE::Syscall::faccessat, fileno($destdh), $dot, &POSIX::W_OK, 0) != -1) { | |
1108 | die "failed to mark bind mount read only\n"; | |
1109 | } | |
1110 | die "read-only check failed: $!\n" if $! != EROFS; | |
1111 | } | |
1112 | } else { | |
1113 | # For the rootfs we don't have a parentfd so we open the path directly. | |
1114 | # Note that this means bindmounting any prefix of the host's | |
1115 | # /var/lib/lxc/$vmid path into another container is considered a grave | |
1116 | # security error. | |
1117 | sysopen $destdh, $last_dir, O_PATH | O_DIRECTORY; | |
1118 | die "failed to open mount point: $!\n" if !$destdh; | |
1119 | } | |
1120 | ||
1121 | my ($srcdev, $srcinode) = stat($srcdh); | |
1122 | my ($dstdev, $dstinode) = stat($destdh); | |
1123 | close $srcdh; | |
1124 | close $destdh; | |
1125 | ||
1126 | return ($srcdev == $dstdev && $srcinode == $dstinode); | |
1127 | } | |
1128 | ||
1129 | # Perform the actual bind mounting: | |
1130 | sub __bindmount_do { | |
1131 | my ($dir, $dest, $ro, @extra_opts) = @_; | |
1132 | PVE::Tools::run_command(['mount', '-o', 'bind', @extra_opts, $dir, $dest]); | |
1133 | if ($ro) { | |
1134 | eval { PVE::Tools::run_command(['mount', '-o', 'bind,remount,ro', $dest]); }; | |
1135 | if (my $err = $@) { | |
1136 | warn "bindmount error\n"; | |
1137 | # don't leave writable bind-mounts behind... | |
1138 | PVE::Tools::run_command(['umount', $dest]); | |
1139 | die $err; | |
1140 | } | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | sub bindmount { | |
1145 | my ($dir, $parentfd, $last_dir, $dest, $ro, @extra_opts) = @_; | |
1146 | ||
1147 | my $srcdh = __bindmount_prepare('/', $dir); | |
1148 | ||
1149 | __bindmount_do($dir, $dest, $ro, @extra_opts); | |
1150 | ||
1151 | if (!__bindmount_verify($srcdh, $parentfd, $last_dir, $ro)) { | |
1152 | PVE::Tools::run_command(['umount', $dest]); | |
1153 | die "detected mount path change at: $dir\n"; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | # Cleanup $rootdir a bit (double and trailing slashes), build the mount path | |
1158 | # from $rootdir and $mount and walk the path from $rootdir to the final | |
1159 | # directory to check for symlinks. | |
1160 | sub __mount_prepare_rootdir { | |
1161 | my ($rootdir, $mount) = @_; | |
1162 | $rootdir =~ s!/+!/!g; | |
1163 | $rootdir =~ s!/+$!!; | |
1164 | my $mount_path = "$rootdir/$mount"; | |
1165 | my ($mpfd, $parentfd, $last_dir) = walk_tree_nofollow($rootdir, $mount, 1); | |
1166 | return ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir); | |
1167 | } | |
1168 | ||
1169 | # use $rootdir = undef to just return the corresponding mount path | |
1170 | sub mountpoint_mount { | |
1171 | my ($mountpoint, $rootdir, $storage_cfg, $snapname) = @_; | |
1172 | ||
1173 | my $volid = $mountpoint->{volume}; | |
1174 | my $mount = $mountpoint->{mp}; | |
1175 | my $type = $mountpoint->{type}; | |
1176 | my $quota = !$snapname && !$mountpoint->{ro} && $mountpoint->{quota}; | |
1177 | my $mounted_dev; | |
1178 | ||
1179 | return if !$volid || !$mount; | |
1180 | ||
1181 | $mount =~ s!/+!/!g; | |
1182 | ||
1183 | my $mount_path; | |
1184 | my ($mpfd, $parentfd, $last_dir); | |
1185 | ||
1186 | if (defined($rootdir)) { | |
1187 | ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir) = | |
1188 | __mount_prepare_rootdir($rootdir, $mount); | |
1189 | } | |
1190 | ||
1191 | my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1); | |
1192 | ||
1193 | die "unknown snapshot path for '$volid'" if !$storage && defined($snapname); | |
1194 | ||
1195 | my $optstring = ''; | |
1196 | my $acl = $mountpoint->{acl}; | |
1197 | if (defined($acl)) { | |
1198 | $optstring .= ($acl ? 'acl' : 'noacl'); | |
1199 | } | |
1200 | my $readonly = $mountpoint->{ro}; | |
1201 | ||
1202 | my @extra_opts = ('-o', $optstring) if $optstring; | |
1203 | ||
1204 | if ($storage) { | |
1205 | ||
1206 | my $scfg = PVE::Storage::storage_config($storage_cfg, $storage); | |
1207 | ||
1208 | # early sanity checks: | |
1209 | # we otherwise call realpath on the rbd url | |
1210 | die "containers on rbd storage without krbd are not supported\n" | |
1211 | if $scfg->{type} eq 'rbd' && !$scfg->{krbd}; | |
1212 | ||
1213 | my $path = PVE::Storage::path($storage_cfg, $volid, $snapname); | |
1214 | ||
1215 | my ($vtype, undef, undef, undef, undef, $isBase, $format) = | |
1216 | PVE::Storage::parse_volname($storage_cfg, $volid); | |
1217 | ||
1218 | $format = 'iso' if $vtype eq 'iso'; # allow to handle iso files | |
1219 | ||
1220 | if ($format eq 'subvol') { | |
1221 | if ($mount_path) { | |
1222 | if ($snapname) { | |
1223 | if ($scfg->{type} eq 'zfspool') { | |
1224 | my $path_arg = $path; | |
1225 | $path_arg =~ s!^/+!!; | |
1226 | PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', $path_arg, $mount_path]); | |
1227 | } else { | |
1228 | die "cannot mount subvol snapshots for storage type '$scfg->{type}'\n"; | |
1229 | } | |
1230 | } else { | |
1231 | if (defined($acl) && $scfg->{type} eq 'zfspool') { | |
1232 | my $acltype = ($acl ? 'acltype=posixacl' : 'acltype=noacl'); | |
1233 | my (undef, $name) = PVE::Storage::parse_volname($storage_cfg, $volid); | |
1234 | $name .= "\@$snapname" if defined($snapname); | |
1235 | PVE::Tools::run_command(['zfs', 'set', $acltype, "$scfg->{pool}/$name"]); | |
1236 | } | |
1237 | bindmount($path, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts); | |
1238 | warn "cannot enable quota control for bind mounted subvolumes\n" if $quota; | |
1239 | } | |
1240 | } | |
1241 | return wantarray ? ($path, 0, undef) : $path; | |
1242 | } elsif ($format eq 'raw' || $format eq 'iso') { | |
1243 | # NOTE: 'mount' performs canonicalization without the '-c' switch, which for | |
1244 | # device-mapper devices is special-cased to use the /dev/mapper symlinks. | |
1245 | # Our autodev hook expects the /dev/dm-* device currently | |
1246 | # and will create the /dev/mapper symlink accordingly | |
1247 | $path = Cwd::realpath($path); | |
1248 | die "failed to get device path\n" if !$path; | |
1249 | ($path) = ($path =~ /^(.*)$/s); #untaint | |
1250 | my $domount = sub { | |
1251 | my ($path) = @_; | |
1252 | if ($mount_path) { | |
1253 | if ($format eq 'iso') { | |
1254 | PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, $path, $mount_path]); | |
1255 | } elsif ($isBase || defined($snapname)) { | |
1256 | PVE::Tools::run_command(['mount', '-o', 'ro,noload', @extra_opts, $path, $mount_path]); | |
1257 | } else { | |
1258 | if ($quota) { | |
1259 | push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0'; | |
1260 | } | |
1261 | push @extra_opts, '-o', 'ro' if $readonly; | |
1262 | PVE::Tools::run_command(['mount', @extra_opts, $path, $mount_path]); | |
1263 | } | |
1264 | } | |
1265 | }; | |
1266 | my $use_loopdev = 0; | |
1267 | if ($scfg->{path}) { | |
1268 | $mounted_dev = run_with_loopdev($domount, $path); | |
1269 | $use_loopdev = 1; | |
1270 | } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' || | |
1271 | $scfg->{type} eq 'rbd' || $scfg->{type} eq 'lvmthin') { | |
1272 | $mounted_dev = $path; | |
1273 | &$domount($path); | |
1274 | } else { | |
1275 | die "unsupported storage type '$scfg->{type}'\n"; | |
1276 | } | |
1277 | return wantarray ? ($path, $use_loopdev, $mounted_dev) : $path; | |
1278 | } else { | |
1279 | die "unsupported image format '$format'\n"; | |
1280 | } | |
1281 | } elsif ($type eq 'device') { | |
1282 | push @extra_opts, '-o', 'ro' if $readonly; | |
1283 | push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0' if $quota; | |
1284 | # See the NOTE above about devicemapper canonicalization | |
1285 | my ($devpath) = (Cwd::realpath($volid) =~ /^(.*)$/s); # realpath() taints | |
1286 | PVE::Tools::run_command(['mount', @extra_opts, $volid, $mount_path]) if $mount_path; | |
1287 | return wantarray ? ($volid, 0, $devpath) : $volid; | |
1288 | } elsif ($type eq 'bind') { | |
1289 | die "directory '$volid' does not exist\n" if ! -d $volid; | |
1290 | bindmount($volid, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts) if $mount_path; | |
1291 | warn "cannot enable quota control for bind mounts\n" if $quota; | |
1292 | return wantarray ? ($volid, 0, undef) : $volid; | |
1293 | } | |
1294 | ||
1295 | die "unsupported storage"; | |
1296 | } | |
1297 | ||
1298 | sub mkfs { | |
1299 | my ($dev, $rootuid, $rootgid) = @_; | |
1300 | ||
1301 | PVE::Tools::run_command(['mkfs.ext4', '-O', 'mmp', | |
1302 | '-E', "root_owner=$rootuid:$rootgid", | |
1303 | $dev]); | |
1304 | } | |
1305 | ||
1306 | sub format_disk { | |
1307 | my ($storage_cfg, $volid, $rootuid, $rootgid) = @_; | |
1308 | ||
1309 | if ($volid =~ m!^/dev/.+!) { | |
1310 | mkfs($volid); | |
1311 | return; | |
1312 | } | |
1313 | ||
1314 | my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1); | |
1315 | ||
1316 | die "cannot format volume '$volid' with no storage\n" if !$storage; | |
1317 | ||
1318 | PVE::Storage::activate_volumes($storage_cfg, [$volid]); | |
1319 | ||
1320 | my $path = PVE::Storage::path($storage_cfg, $volid); | |
1321 | ||
1322 | my ($vtype, undef, undef, undef, undef, $isBase, $format) = | |
1323 | PVE::Storage::parse_volname($storage_cfg, $volid); | |
1324 | ||
1325 | die "cannot format volume '$volid' (format == $format)\n" | |
1326 | if $format ne 'raw'; | |
1327 | ||
1328 | mkfs($path, $rootuid, $rootgid); | |
1329 | } | |
1330 | ||
1331 | sub destroy_disks { | |
1332 | my ($storecfg, $vollist) = @_; | |
1333 | ||
1334 | foreach my $volid (@$vollist) { | |
1335 | eval { PVE::Storage::vdisk_free($storecfg, $volid); }; | |
1336 | warn $@ if $@; | |
1337 | } | |
1338 | } | |
1339 | ||
1340 | sub alloc_disk { | |
1341 | my ($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid) = @_; | |
1342 | ||
1343 | my $needs_chown = 0; | |
1344 | my $volid; | |
1345 | ||
1346 | my $scfg = PVE::Storage::storage_config($storecfg, $storage); | |
1347 | # fixme: use better naming ct-$vmid-disk-X.raw? | |
1348 | ||
1349 | eval { | |
1350 | my $do_format = 0; | |
1351 | if ($scfg->{type} eq 'dir' || $scfg->{type} eq 'nfs' || $scfg->{type} eq 'cifs' ) { | |
1352 | if ($size_kb > 0) { | |
1353 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', | |
1354 | undef, $size_kb); | |
1355 | $do_format = 1; | |
1356 | } else { | |
1357 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol', | |
1358 | undef, 0); | |
1359 | $needs_chown = 1; | |
1360 | } | |
1361 | } elsif ($scfg->{type} eq 'zfspool') { | |
1362 | ||
1363 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol', | |
1364 | undef, $size_kb); | |
1365 | $needs_chown = 1; | |
1366 | } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' || $scfg->{type} eq 'lvmthin') { | |
1367 | ||
1368 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb); | |
1369 | $do_format = 1; | |
1370 | ||
1371 | } elsif ($scfg->{type} eq 'rbd') { | |
1372 | ||
1373 | die "krbd option must be enabled on storage type '$scfg->{type}'\n" if !$scfg->{krbd}; | |
1374 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb); | |
1375 | $do_format = 1; | |
1376 | } else { | |
1377 | die "unable to create containers on storage type '$scfg->{type}'\n"; | |
1378 | } | |
1379 | format_disk($storecfg, $volid, $rootuid, $rootgid) if $do_format; | |
1380 | }; | |
1381 | if (my $err = $@) { | |
1382 | # in case formatting got interrupted: | |
1383 | if (defined($volid)) { | |
1384 | eval { PVE::Storage::vdisk_free($storecfg, $volid); }; | |
1385 | warn $@ if $@; | |
1386 | } | |
1387 | die $err; | |
1388 | } | |
1389 | ||
1390 | return ($volid, $needs_chown); | |
1391 | } | |
1392 | ||
1393 | our $NEW_DISK_RE = qr/^([^:\s]+):(\d+(\.\d+)?)$/; | |
1394 | sub create_disks { | |
1395 | my ($storecfg, $vmid, $settings, $conf) = @_; | |
1396 | ||
1397 | my $vollist = []; | |
1398 | ||
1399 | eval { | |
1400 | my (undef, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf); | |
1401 | my $chown_vollist = []; | |
1402 | ||
1403 | PVE::LXC::Config->foreach_mountpoint($settings, sub { | |
1404 | my ($ms, $mountpoint) = @_; | |
1405 | ||
1406 | my $volid = $mountpoint->{volume}; | |
1407 | my $mp = $mountpoint->{mp}; | |
1408 | ||
1409 | my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1); | |
1410 | ||
1411 | if ($storage && ($volid =~ $NEW_DISK_RE)) { | |
1412 | my ($storeid, $size_gb) = ($1, $2); | |
1413 | ||
1414 | my $size_kb = int(${size_gb}*1024) * 1024; | |
1415 | ||
1416 | my $needs_chown = 0; | |
1417 | ($volid, $needs_chown) = alloc_disk($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid); | |
1418 | push @$chown_vollist, $volid if $needs_chown; | |
1419 | push @$vollist, $volid; | |
1420 | $mountpoint->{volume} = $volid; | |
1421 | $mountpoint->{size} = $size_kb * 1024; | |
1422 | $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs'); | |
1423 | } else { | |
1424 | # use specified/existing volid/dir/device | |
1425 | $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs'); | |
1426 | } | |
1427 | }); | |
1428 | ||
1429 | PVE::Storage::activate_volumes($storecfg, $chown_vollist, undef); | |
1430 | foreach my $volid (@$chown_vollist) { | |
1431 | my $path = PVE::Storage::path($storecfg, $volid, undef); | |
1432 | chown($rootuid, $rootgid, $path); | |
1433 | } | |
1434 | PVE::Storage::deactivate_volumes($storecfg, $chown_vollist, undef); | |
1435 | }; | |
1436 | # free allocated images on error | |
1437 | if (my $err = $@) { | |
1438 | destroy_disks($storecfg, $vollist); | |
1439 | die $err; | |
1440 | } | |
1441 | return $vollist; | |
1442 | } | |
1443 | ||
1444 | # bash completion helper | |
1445 | ||
1446 | sub complete_os_templates { | |
1447 | my ($cmdname, $pname, $cvalue) = @_; | |
1448 | ||
1449 | my $cfg = PVE::Storage::config(); | |
1450 | ||
1451 | my $storeid; | |
1452 | ||
1453 | if ($cvalue =~ m/^([^:]+):/) { | |
1454 | $storeid = $1; | |
1455 | } | |
1456 | ||
1457 | my $vtype = $cmdname eq 'restore' ? 'backup' : 'vztmpl'; | |
1458 | my $data = PVE::Storage::template_list($cfg, $storeid, $vtype); | |
1459 | ||
1460 | my $res = []; | |
1461 | foreach my $id (keys %$data) { | |
1462 | foreach my $item (@{$data->{$id}}) { | |
1463 | push @$res, $item->{volid} if defined($item->{volid}); | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | return $res; | |
1468 | } | |
1469 | ||
1470 | my $complete_ctid_full = sub { | |
1471 | my ($running) = @_; | |
1472 | ||
1473 | my $idlist = vmstatus(); | |
1474 | ||
1475 | my $active_hash = list_active_containers(); | |
1476 | ||
1477 | my $res = []; | |
1478 | ||
1479 | foreach my $id (keys %$idlist) { | |
1480 | my $d = $idlist->{$id}; | |
1481 | if (defined($running)) { | |
1482 | next if $d->{template}; | |
1483 | next if $running && !$active_hash->{$id}; | |
1484 | next if !$running && $active_hash->{$id}; | |
1485 | } | |
1486 | push @$res, $id; | |
1487 | ||
1488 | } | |
1489 | return $res; | |
1490 | }; | |
1491 | ||
1492 | sub complete_ctid { | |
1493 | return &$complete_ctid_full(); | |
1494 | } | |
1495 | ||
1496 | sub complete_ctid_stopped { | |
1497 | return &$complete_ctid_full(0); | |
1498 | } | |
1499 | ||
1500 | sub complete_ctid_running { | |
1501 | return &$complete_ctid_full(1); | |
1502 | } | |
1503 | ||
1504 | sub parse_id_maps { | |
1505 | my ($conf) = @_; | |
1506 | ||
1507 | my $id_map = []; | |
1508 | my $rootuid = 0; | |
1509 | my $rootgid = 0; | |
1510 | ||
1511 | my $lxc = $conf->{lxc}; | |
1512 | foreach my $entry (@$lxc) { | |
1513 | my ($key, $value) = @$entry; | |
1514 | # FIXME: remove the 'id_map' variant when lxc-3.0 arrives | |
1515 | next if $key ne 'lxc.idmap' && $key ne 'lxc.id_map'; | |
1516 | if ($value =~ /^([ug])\s+(\d+)\s+(\d+)\s+(\d+)\s*$/) { | |
1517 | my ($type, $ct, $host, $length) = ($1, $2, $3, $4); | |
1518 | push @$id_map, [$type, $ct, $host, $length]; | |
1519 | if ($ct == 0) { | |
1520 | $rootuid = $host if $type eq 'u'; | |
1521 | $rootgid = $host if $type eq 'g'; | |
1522 | } | |
1523 | } else { | |
1524 | die "failed to parse idmap: $value\n"; | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | if (!@$id_map && $conf->{unprivileged}) { | |
1529 | # Should we read them from /etc/subuid? | |
1530 | $id_map = [ ['u', '0', '100000', '65536'], | |
1531 | ['g', '0', '100000', '65536'] ]; | |
1532 | $rootuid = $rootgid = 100000; | |
1533 | } | |
1534 | ||
1535 | return ($id_map, $rootuid, $rootgid); | |
1536 | } | |
1537 | ||
1538 | sub userns_command { | |
1539 | my ($id_map) = @_; | |
1540 | if (@$id_map) { | |
1541 | return ['lxc-usernsexec', (map { ('-m', join(':', @$_)) } @$id_map), '--']; | |
1542 | } | |
1543 | return []; | |
1544 | } | |
1545 | ||
1546 | sub vm_start { | |
1547 | my ($vmid, $conf, $skiplock) = @_; | |
1548 | ||
1549 | update_lxc_config($vmid, $conf); | |
1550 | ||
1551 | my $skiplock_flag_fn = "/run/lxc/skiplock-$vmid"; | |
1552 | ||
1553 | if ($skiplock) { | |
1554 | open(my $fh, '>', $skiplock_flag_fn) || die "failed to open $skiplock_flag_fn for writing: $!\n"; | |
1555 | close($fh); | |
1556 | } | |
1557 | ||
1558 | my $cmd = ['systemctl', 'start', "pve-container\@$vmid"]; | |
1559 | ||
1560 | eval { PVE::Tools::run_command($cmd); }; | |
1561 | if (my $err = $@) { | |
1562 | unlink $skiplock_flag_fn; | |
1563 | die $err; | |
1564 | } | |
1565 | ||
1566 | return; | |
1567 | } | |
1568 | ||
1569 | # Helper to stop a container completely and make sure it has stopped completely. | |
1570 | # This is necessary because we want the post-stop hook to have completed its | |
1571 | # unmount-all step, but post-stop happens after lxc puts the container into the | |
1572 | # STOPPED state. | |
1573 | sub vm_stop { | |
1574 | my ($vmid, $kill, $shutdown_timeout, $exit_timeout) = @_; | |
1575 | ||
1576 | # Open the container's command socket. | |
1577 | my $path = "\0/var/lib/lxc/$vmid/command"; | |
1578 | my $sock = IO::Socket::UNIX->new( | |
1579 | Type => SOCK_STREAM(), | |
1580 | Peer => $path, | |
1581 | ); | |
1582 | if (!$sock) { | |
1583 | return if $! == ECONNREFUSED; # The container is not running | |
1584 | die "failed to open container ${vmid}'s command socket: $!\n"; | |
1585 | } | |
1586 | ||
1587 | # Stop the container: | |
1588 | ||
1589 | my $cmd = ['lxc-stop', '-n', $vmid]; | |
1590 | ||
1591 | if ($kill) { | |
1592 | push @$cmd, '--kill'; # doesn't allow timeouts | |
1593 | } elsif (defined($shutdown_timeout)) { | |
1594 | push @$cmd, '--timeout', $shutdown_timeout; | |
1595 | # Give run_command 5 extra seconds | |
1596 | $shutdown_timeout += 5; | |
1597 | } | |
1598 | ||
1599 | eval { PVE::Tools::run_command($cmd, timeout => $shutdown_timeout) }; | |
1600 | if (my $err = $@) { | |
1601 | warn $@ if $@; | |
1602 | } | |
1603 | ||
1604 | my $result = 1; | |
1605 | my $wait = sub { $result = <$sock>; }; | |
1606 | if (defined($exit_timeout)) { | |
1607 | PVE::Tools::run_with_timeout($exit_timeout, $wait); | |
1608 | } else { | |
1609 | $wait->(); | |
1610 | } | |
1611 | ||
1612 | return if !defined $result; # monitor is gone and the ct has stopped. | |
1613 | die "container did not stop\n"; | |
1614 | } | |
1615 | ||
1616 | sub run_unshared { | |
1617 | my ($code) = @_; | |
1618 | ||
1619 | return PVE::Tools::run_fork(sub { | |
1620 | # Unshare the mount namespace | |
1621 | die "failed to unshare mount namespace: $!\n" | |
1622 | if !PVE::Tools::unshare(PVE::Tools::CLONE_NEWNS); | |
1623 | PVE::Tools::run_command(['mount', '--make-rslave', '/']); | |
1624 | return $code->(); | |
1625 | }); | |
1626 | } | |
1627 | ||
1628 | my $copy_volume = sub { | |
1629 | my ($src_volid, $src, $dst_volid, $dest, $storage_cfg, $snapname) = @_; | |
1630 | ||
1631 | my $src_mp = { volume => $src_volid, mp => '/' }; | |
1632 | $src_mp->{type} = PVE::LXC::Config->classify_mountpoint($src_volid); | |
1633 | ||
1634 | my $dst_mp = { volume => $dst_volid, mp => '/' }; | |
1635 | $dst_mp->{type} = PVE::LXC::Config->classify_mountpoint($dst_volid); | |
1636 | ||
1637 | my @mounted; | |
1638 | eval { | |
1639 | # mount and copy | |
1640 | mkdir $src; | |
1641 | mountpoint_mount($src_mp, $src, $storage_cfg, $snapname); | |
1642 | push @mounted, $src; | |
1643 | mkdir $dest; | |
1644 | mountpoint_mount($dst_mp, $dest, $storage_cfg); | |
1645 | push @mounted, $dest; | |
1646 | ||
1647 | PVE::Tools::run_command(['/usr/bin/rsync', '--stats', '-X', '-A', '--numeric-ids', | |
1648 | '-aH', '--whole-file', '--sparse', '--one-file-system', | |
1649 | "$src/", $dest]); | |
1650 | }; | |
1651 | my $err = $@; | |
1652 | foreach my $mount (reverse @mounted) { | |
1653 | eval { PVE::Tools::run_command(['/bin/umount', '--lazy', $mount], errfunc => sub{})}; | |
1654 | warn "Can't umount $mount\n" if $@; | |
1655 | } | |
1656 | ||
1657 | # If this fails they're used as mount points in a concurrent operation | |
1658 | # (which should not happen but there's also no real need to get rid of them). | |
1659 | rmdir $dest; | |
1660 | rmdir $src; | |
1661 | ||
1662 | die $err if $err; | |
1663 | }; | |
1664 | ||
1665 | # Should not be called after unsharing the mount namespace! | |
1666 | sub copy_volume { | |
1667 | my ($mp, $vmid, $storage, $storage_cfg, $conf, $snapname) = @_; | |
1668 | ||
1669 | die "cannot copy volumes of type $mp->{type}\n" if $mp->{type} ne 'volume'; | |
1670 | File::Path::make_path("/var/lib/lxc/$vmid"); | |
1671 | my $dest = "/var/lib/lxc/$vmid/.copy-volume-1"; | |
1672 | my $src = "/var/lib/lxc/$vmid/.copy-volume-2"; | |
1673 | ||
1674 | # get id's for unprivileged container | |
1675 | my (undef, $rootuid, $rootgid) = parse_id_maps($conf); | |
1676 | ||
1677 | # Allocate the disk before unsharing in order to make sure zfs subvolumes | |
1678 | # are visible in this namespace, otherwise the host only sees the empty | |
1679 | # (not-mounted) directory. | |
1680 | my $new_volid; | |
1681 | eval { | |
1682 | # Make sure $mp contains a correct size. | |
1683 | $mp->{size} = PVE::Storage::volume_size_info($storage_cfg, $mp->{volume}); | |
1684 | my $needs_chown; | |
1685 | ($new_volid, $needs_chown) = alloc_disk($storage_cfg, $vmid, $storage, $mp->{size}/1024, $rootuid, $rootgid); | |
1686 | if ($needs_chown) { | |
1687 | PVE::Storage::activate_volumes($storage_cfg, [$new_volid], undef); | |
1688 | my $path = PVE::Storage::path($storage_cfg, $new_volid, undef); | |
1689 | chown($rootuid, $rootgid, $path); | |
1690 | } | |
1691 | ||
1692 | run_unshared(sub { | |
1693 | $copy_volume->($mp->{volume}, $src, $new_volid, $dest, $storage_cfg, $snapname); | |
1694 | }); | |
1695 | }; | |
1696 | if (my $err = $@) { | |
1697 | PVE::Storage::vdisk_free($storage_cfg, $new_volid) | |
1698 | if defined($new_volid); | |
1699 | die $err; | |
1700 | } | |
1701 | ||
1702 | return $new_volid; | |
1703 | } | |
1704 | ||
1705 | 1; |