]>
Commit | Line | Data |
---|---|---|
f76a2828 DM |
1 | package PVE::LXC; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
67afe46e | 5 | |
d14a9a1b | 6 | use POSIX qw(EINTR); |
f76a2828 | 7 | |
34fdb3d7 WB |
8 | use Socket; |
9 | ||
f76a2828 | 10 | use File::Path; |
2cfae16e WB |
11 | use File::Spec; |
12 | use Cwd qw(); | |
172ea186 | 13 | use Fcntl qw(O_RDONLY O_WRONLY O_NOFOLLOW O_DIRECTORY); |
180c05c5 | 14 | use Errno qw(ELOOP ENOTDIR EROFS ECONNREFUSED ENOSYS EEXIST); |
b1bad293 | 15 | use IO::Socket::UNIX; |
f76a2828 | 16 | |
f1ba1a4b | 17 | use PVE::Exception qw(raise_perm_exc); |
c65e0a6d | 18 | use PVE::Storage; |
f76a2828 DM |
19 | use PVE::SafeSyslog; |
20 | use PVE::INotify; | |
8233d33d | 21 | use PVE::JSONSchema qw(get_standard_option); |
2df08734 | 22 | use PVE::Tools qw( |
113c506f FG |
23 | dir_glob_foreach file_get_contents file_set_contents |
24 | AT_FDCWD O_PATH $IPV4RE $IPV6RE | |
2df08734 | 25 | ); |
92902047 | 26 | use PVE::CpuSet; |
68fba17b | 27 | use PVE::Network; |
52389a07 | 28 | use PVE::AccessControl; |
228a5a1d | 29 | use PVE::ProcFSTools; |
ef447944 | 30 | use PVE::Syscall qw(:fsmount); |
67afe46e | 31 | use PVE::LXC::Config; |
e954d016 | 32 | use PVE::GuestHelpers qw(safe_string_ne safe_num_ne safe_boolean_ne); |
ef447944 | 33 | use PVE::LXC::Tools; |
0b1b12e0 | 34 | use PVE::LXC::CGroup; |
abaa24bd | 35 | use PVE::LXC::Monitor; |
85ccb17f | 36 | use PVE::CGroup; |
8233d33d | 37 | |
688afc63 | 38 | use Time::HiRes qw (gettimeofday); |
ab2ec461 AD |
39 | my $have_sdn; |
40 | eval { | |
41 | require PVE::Network::SDN::Zones; | |
42 | $have_sdn = 1; | |
43 | }; | |
f76a2828 | 44 | |
5a63f1c5 WB |
45 | my $LXC_CONFIG_PATH = '/usr/share/lxc/config'; |
46 | ||
27916659 DM |
47 | my $nodename = PVE::INotify::nodename(); |
48 | ||
688afc63 WL |
49 | my $cpuinfo= PVE::ProcFSTools::read_cpuinfo(); |
50 | ||
f76a2828 DM |
51 | sub config_list { |
52 | my $vmlist = PVE::Cluster::get_vmlist(); | |
53 | my $res = {}; | |
54 | return $res if !$vmlist || !$vmlist->{ids}; | |
55 | my $ids = $vmlist->{ids}; | |
56 | ||
57 | foreach my $vmid (keys %$ids) { | |
58 | next if !$vmid; # skip CT0 | |
59 | my $d = $ids->{$vmid}; | |
60 | next if !$d->{node} || $d->{node} ne $nodename; | |
61 | next if !$d->{type} || $d->{type} ne 'lxc'; | |
8233d33d | 62 | $res->{$vmid} = { type => 'lxc', vmid => $vmid }; |
f76a2828 DM |
63 | } |
64 | return $res; | |
65 | } | |
66 | ||
822de0c3 DM |
67 | # container status helpers |
68 | ||
69 | sub list_active_containers { | |
cbb03fea | 70 | |
822de0c3 DM |
71 | my $filename = "/proc/net/unix"; |
72 | ||
73 | # similar test is used by lcxcontainers.c: list_active_containers | |
74 | my $res = {}; | |
cbb03fea | 75 | |
822de0c3 DM |
76 | my $fh = IO::File->new ($filename, "r"); |
77 | return $res if !$fh; | |
78 | ||
79 | while (defined(my $line = <$fh>)) { | |
28df2cde | 80 | if ($line =~ m/^[a-f0-9]+:\s+\S+\s+\S+\s+\S+\s+\S+\s+\S+\s+\d+\s+(\S+)$/) { |
822de0c3 | 81 | my $path = $1; |
27916659 | 82 | if ($path =~ m!^@/var/lib/lxc/(\d+)/command$!) { |
822de0c3 DM |
83 | $res->{$1} = 1; |
84 | } | |
85 | } | |
86 | } | |
87 | ||
88 | close($fh); | |
cbb03fea | 89 | |
822de0c3 DM |
90 | return $res; |
91 | } | |
f76a2828 | 92 | |
5c752bbf DM |
93 | # warning: this is slow |
94 | sub check_running { | |
95 | my ($vmid) = @_; | |
96 | ||
97 | my $active_hash = list_active_containers(); | |
98 | ||
99 | return 1 if defined($active_hash->{$vmid}); | |
cbb03fea | 100 | |
5c752bbf DM |
101 | return undef; |
102 | } | |
103 | ||
10fc3ba5 | 104 | sub get_container_disk_usage { |
73e03cb7 | 105 | my ($vmid, $pid) = @_; |
10fc3ba5 | 106 | |
73e03cb7 | 107 | return PVE::Tools::df("/proc/$pid/root/", 1); |
10fc3ba5 DM |
108 | } |
109 | ||
688afc63 WL |
110 | my $last_proc_vmid_stat; |
111 | ||
8233d33d DM |
112 | our $vmstatus_return_properties = { |
113 | vmid => get_standard_option('pve-vmid'), | |
114 | status => { | |
115 | description => "LXC Container status.", | |
116 | type => 'string', | |
117 | enum => ['stopped', 'running'], | |
118 | }, | |
119 | maxmem => { | |
120 | description => "Maximum memory in bytes.", | |
121 | type => 'integer', | |
122 | optional => 1, | |
123 | renderer => 'bytes', | |
124 | }, | |
125 | maxswap => { | |
126 | description => "Maximum SWAP memory in bytes.", | |
127 | type => 'integer', | |
128 | optional => 1, | |
129 | renderer => 'bytes', | |
130 | }, | |
131 | maxdisk => { | |
132 | description => "Root disk size in bytes.", | |
133 | type => 'integer', | |
134 | optional => 1, | |
135 | renderer => 'bytes', | |
136 | }, | |
137 | name => { | |
138 | description => "Container name.", | |
139 | type => 'string', | |
140 | optional => 1, | |
141 | }, | |
142 | uptime => { | |
143 | description => "Uptime.", | |
144 | type => 'integer', | |
145 | optional => 1, | |
146 | renderer => 'duration', | |
147 | }, | |
148 | cpus => { | |
149 | description => "Maximum usable CPUs.", | |
150 | type => 'number', | |
151 | optional => 1, | |
152 | }, | |
440b6427 | 153 | lock => { |
87c5dc96 | 154 | description => "The current config lock, if any.", |
440b6427 DC |
155 | type => 'string', |
156 | optional => 1, | |
733e52ec DC |
157 | }, |
158 | tags => { | |
159 | description => "The current configured tags, if any.", | |
160 | type => 'string', | |
161 | optional => 1, | |
440b6427 | 162 | } |
8233d33d DM |
163 | }; |
164 | ||
f76a2828 DM |
165 | sub vmstatus { |
166 | my ($opt_vmid) = @_; | |
167 | ||
8233d33d | 168 | my $list = $opt_vmid ? { $opt_vmid => { type => 'lxc', vmid => $opt_vmid }} : config_list(); |
f76a2828 | 169 | |
822de0c3 | 170 | my $active_hash = list_active_containers(); |
cbb03fea | 171 | |
688afc63 WL |
172 | my $cpucount = $cpuinfo->{cpus} || 1; |
173 | ||
174 | my $cdtime = gettimeofday; | |
175 | ||
176 | my $uptime = (PVE::ProcFSTools::read_proc_uptime(1))[0]; | |
80d56111 | 177 | my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK); |
688afc63 | 178 | |
3b5070d4 WB |
179 | my $unprivileged = {}; |
180 | ||
f76a2828 | 181 | foreach my $vmid (keys %$list) { |
f76a2828 | 182 | my $d = $list->{$vmid}; |
10fc3ba5 | 183 | |
d5588ee3 DM |
184 | eval { $d->{pid} = find_lxc_pid($vmid) if defined($active_hash->{$vmid}); }; |
185 | warn $@ if $@; # ignore errors (consider them stopped) | |
cbb03fea | 186 | |
2ff1c49c | 187 | $d->{status} = $active_hash->{$vmid} ? 'running' : 'stopped'; |
f76a2828 | 188 | |
67afe46e | 189 | my $cfspath = PVE::LXC::Config->cfs_config_path($vmid); |
238a56cb | 190 | my $conf = PVE::Cluster::cfs_read_file($cfspath) || {}; |
cbb03fea | 191 | |
3b5070d4 WB |
192 | $unprivileged->{$vmid} = $conf->{unprivileged}; |
193 | ||
aec218c7 | 194 | $d->{name} = $conf->{'hostname'} || "CT$vmid"; |
238a56cb | 195 | $d->{name} =~ s/[\s]//g; |
cbb03fea | 196 | |
f2357408 DM |
197 | $d->{cpus} = $conf->{cores} || $conf->{cpulimit}; |
198 | $d->{cpus} = $cpucount if !$d->{cpus}; | |
44da0641 | 199 | |
d0226204 | 200 | $d->{lock} = $conf->{lock} || ''; |
733e52ec | 201 | $d->{tags} = $conf->{tags} if defined($conf->{tags}); |
d0226204 | 202 | |
d5588ee3 DM |
203 | if ($d->{pid}) { |
204 | my $res = get_container_disk_usage($vmid, $d->{pid}); | |
27916659 DM |
205 | $d->{disk} = $res->{used}; |
206 | $d->{maxdisk} = $res->{total}; | |
207 | } else { | |
208 | $d->{disk} = 0; | |
209 | # use 4GB by default ?? | |
210 | if (my $rootfs = $conf->{rootfs}) { | |
e4034859 | 211 | my $rootinfo = PVE::LXC::Config->parse_volume('rootfs', $rootfs); |
af02245c | 212 | $d->{maxdisk} = $rootinfo->{size} || (4*1024*1024*1024); |
27916659 DM |
213 | } else { |
214 | $d->{maxdisk} = 4*1024*1024*1024; | |
10fc3ba5 | 215 | } |
238a56cb | 216 | } |
cbb03fea | 217 | |
238a56cb DM |
218 | $d->{mem} = 0; |
219 | $d->{swap} = 0; | |
95df9a12 DM |
220 | $d->{maxmem} = ($conf->{memory}||512)*1024*1024; |
221 | $d->{maxswap} = ($conf->{swap}//0)*1024*1024; | |
e901d418 | 222 | |
238a56cb DM |
223 | $d->{uptime} = 0; |
224 | $d->{cpu} = 0; | |
e901d418 | 225 | |
238a56cb DM |
226 | $d->{netout} = 0; |
227 | $d->{netin} = 0; | |
f76a2828 | 228 | |
238a56cb DM |
229 | $d->{diskread} = 0; |
230 | $d->{diskwrite} = 0; | |
bb1ac2de | 231 | |
67afe46e | 232 | $d->{template} = PVE::LXC::Config->is_template($conf); |
440b6427 | 233 | $d->{lock} = $conf->{lock} if $conf->{lock}; |
f76a2828 | 234 | } |
cbb03fea | 235 | |
238a56cb DM |
236 | foreach my $vmid (keys %$list) { |
237 | my $d = $list->{$vmid}; | |
d5588ee3 DM |
238 | my $pid = $d->{pid}; |
239 | ||
240 | next if !$pid; # skip stopped CTs | |
f76a2828 | 241 | |
80d56111 DC |
242 | my $proc_pid_stat = PVE::ProcFSTools::read_proc_pid_stat($pid); |
243 | $d->{uptime} = int(($uptime - $proc_pid_stat->{starttime}) / $clock_ticks); # the method lxcfs uses | |
22a77285 | 244 | |
3b5070d4 WB |
245 | my $unpriv = $unprivileged->{$vmid}; |
246 | ||
0b1b12e0 WB |
247 | my $cgroups = PVE::LXC::CGroup->new($vmid); |
248 | ||
571e61b4 WB |
249 | if (defined(my $mem = $cgroups->get_memory_stat())) { |
250 | $d->{mem} = $mem->{mem}; | |
251 | $d->{swap} = $mem->{swap}; | |
0b6a2f0e WB |
252 | } else { |
253 | $d->{mem} = 0; | |
254 | $d->{swap} = 0; | |
255 | } | |
256 | ||
0b1b12e0 WB |
257 | if (defined(my $blkio = $cgroups->get_io_stats())) { |
258 | $d->{diskread} = $blkio->{diskread}; | |
259 | $d->{diskwrite} = $blkio->{diskwrite}; | |
0b6a2f0e WB |
260 | } else { |
261 | $d->{diskread} = 0; | |
262 | $d->{diskwrite} = 0; | |
b5289322 | 263 | } |
688afc63 | 264 | |
204f4fbf WB |
265 | if (defined(my $cpu = $cgroups->get_cpu_stat())) { |
266 | # Total time (in milliseconds) used up by the cpu. | |
267 | my $used_ms = $cpu->{utime} + $cpu->{stime}; | |
688afc63 | 268 | |
0b6a2f0e WB |
269 | my $old = $last_proc_vmid_stat->{$vmid}; |
270 | if (!$old) { | |
271 | $last_proc_vmid_stat->{$vmid} = { | |
272 | time => $cdtime, | |
204f4fbf | 273 | used => $used_ms, |
0b6a2f0e WB |
274 | cpu => 0, |
275 | }; | |
276 | next; | |
277 | } | |
688afc63 | 278 | |
204f4fbf WB |
279 | my $delta_ms = ($cdtime - $old->{time}) * $cpucount * 1000.0; |
280 | if ($delta_ms > 1000.0) { | |
281 | my $delta_used_ms = $used_ms - $old->{used}; | |
282 | $d->{cpu} = (($delta_used_ms / $delta_ms) * $cpucount) / $d->{cpus}; | |
0b6a2f0e WB |
283 | $last_proc_vmid_stat->{$vmid} = { |
284 | time => $cdtime, | |
204f4fbf | 285 | used => $used_ms, |
0b6a2f0e WB |
286 | cpu => $d->{cpu}, |
287 | }; | |
288 | } else { | |
289 | $d->{cpu} = $old->{cpu}; | |
290 | } | |
688afc63 | 291 | } else { |
0b6a2f0e | 292 | $d->{cpu} = 0; |
688afc63 | 293 | } |
238a56cb | 294 | } |
cbb03fea | 295 | |
68b8f4d1 WL |
296 | my $netdev = PVE::ProcFSTools::read_proc_net_dev(); |
297 | ||
298 | foreach my $dev (keys %$netdev) { | |
299 | next if $dev !~ m/^veth([1-9]\d*)i/; | |
300 | my $vmid = $1; | |
301 | my $d = $list->{$vmid}; | |
302 | ||
303 | next if !$d; | |
304 | ||
305 | $d->{netout} += $netdev->{$dev}->{receive}; | |
306 | $d->{netin} += $netdev->{$dev}->{transmit}; | |
307 | ||
308 | } | |
309 | ||
f76a2828 DM |
310 | return $list; |
311 | } | |
312 | ||
52f1d76b DM |
313 | sub find_lxc_console_pids { |
314 | ||
315 | my $res = {}; | |
316 | ||
317 | PVE::Tools::dir_glob_foreach('/proc', '\d+', sub { | |
318 | my ($pid) = @_; | |
319 | ||
320 | my $cmdline = PVE::Tools::file_read_firstline("/proc/$pid/cmdline"); | |
321 | return if !$cmdline; | |
322 | ||
323 | my @args = split(/\0/, $cmdline); | |
324 | ||
c31ad455 | 325 | # search for lxc-console -n <vmid> |
cbb03fea | 326 | return if scalar(@args) != 3; |
52f1d76b DM |
327 | return if $args[1] ne '-n'; |
328 | return if $args[2] !~ m/^\d+$/; | |
329 | return if $args[0] !~ m|^(/usr/bin/)?lxc-console$|; | |
cbb03fea | 330 | |
52f1d76b | 331 | my $vmid = $args[2]; |
cbb03fea | 332 | |
52f1d76b DM |
333 | push @{$res->{$vmid}}, $pid; |
334 | }); | |
335 | ||
336 | return $res; | |
337 | } | |
338 | ||
bedeaaf1 AD |
339 | sub find_lxc_pid { |
340 | my ($vmid) = @_; | |
341 | ||
342 | my $pid = undef; | |
343 | my $parser = sub { | |
344 | my $line = shift; | |
8b25977f | 345 | $pid = $1 if $line =~ m/^PID:\s+(\d+)$/; |
bedeaaf1 | 346 | }; |
c39aa40a | 347 | PVE::Tools::run_command(['lxc-info', '-n', $vmid, '-p'], outfunc => $parser); |
bedeaaf1 | 348 | |
8b25977f | 349 | die "unable to get PID for CT $vmid (not running?)\n" if !$pid; |
cbb03fea | 350 | |
8b25977f | 351 | return $pid; |
bedeaaf1 AD |
352 | } |
353 | ||
ab74a9ba WB |
354 | sub open_pid_fd($) { |
355 | my ($pid) = @_; | |
356 | sysopen(my $fd, "/proc/$pid", O_RDONLY | O_DIRECTORY) | |
357 | or die "failed to open /proc/$pid pid fd\n"; | |
358 | return $fd; | |
359 | } | |
360 | ||
361 | sub open_lxc_pid { | |
362 | my ($vmid) = @_; | |
363 | ||
364 | # Find the pid and open: | |
365 | my $pid = find_lxc_pid($vmid); | |
366 | my $fd = open_pid_fd($pid); | |
367 | ||
368 | # Verify: | |
369 | my $pid2 = find_lxc_pid($vmid); | |
370 | ||
371 | return () if $pid != $pid2; | |
372 | return ($pid, $fd); | |
373 | } | |
374 | ||
375 | sub open_ppid { | |
376 | my ($pid) = @_; | |
377 | ||
378 | # Find the parent pid via proc and open it: | |
379 | my $stat = PVE::ProcFSTools::read_proc_pid_stat($pid); | |
380 | my $ppid = $stat->{ppid} // die "failed to get parent pid\n"; | |
381 | ||
382 | my $fd = open_pid_fd($ppid); | |
383 | ||
384 | # Verify: | |
385 | $stat = PVE::ProcFSTools::read_proc_pid_stat($pid); | |
386 | my $ppid2 = $stat->{ppid} // die "failed to get parent pid for verification\n"; | |
387 | ||
388 | return () if $ppid != $ppid2; | |
389 | return ($ppid, $fd); | |
390 | } | |
391 | ||
cbb03fea | 392 | # Note: we cannot use Net:IP, because that only allows strict |
55fa4e09 DM |
393 | # CIDR networks |
394 | sub parse_ipv4_cidr { | |
395 | my ($cidr, $noerr) = @_; | |
396 | ||
f7a7b413 WB |
397 | if ($cidr =~ m!^($IPV4RE)(?:/(\d+))$! && ($2 > 7) && ($2 <= 32)) { |
398 | return { address => $1, netmask => $PVE::Network::ipv4_reverse_mask->[$2] }; | |
55fa4e09 | 399 | } |
cbb03fea | 400 | |
55fa4e09 | 401 | return undef if $noerr; |
cbb03fea | 402 | |
55fa4e09 DM |
403 | die "unable to parse ipv4 address/mask\n"; |
404 | } | |
93285df8 | 405 | |
85ccb17f | 406 | # Deprecated. Use `PVE::CGroup::get_cgroup_controllers()` instead. |
0b6a2f0e | 407 | sub get_cgroup_subsystems { |
85ccb17f | 408 | PVE::CGroup::get_v1_controllers(); |
0b6a2f0e | 409 | } |
e22af68f | 410 | |
2df08734 WB |
411 | # With seccomp trap to userspace we now have the ability to optionally forward |
412 | # certain syscalls to the "host" to handle (via our pve-lxc-syscalld daemon). | |
5a63f1c5 | 413 | # |
2df08734 WB |
414 | # This means that there are cases where we need to create an extra seccomp |
415 | # profile for the container to load. | |
416 | # | |
417 | # This returns a configuration snippet added to the raw lxc config. | |
5a63f1c5 | 418 | sub make_seccomp_config { |
fb766003 | 419 | my ($conf, $vmid, $conf_dir, $unprivileged, $features) = @_; |
5a63f1c5 WB |
420 | # User-configured profile has precedence, note that the user's entry would |
421 | # be written 'after' this line anyway... | |
422 | if (PVE::LXC::Config->has_lxc_entry($conf, 'lxc.seccomp.profile')) { | |
423 | # Warn the user if this conflicts with a feature: | |
2df08734 WB |
424 | my $warn = join(', ', grep { $features->{$_} } qw(keyctl mknod)); |
425 | warn "explicitly configured lxc.seccomp.profile overrides the following settings: $warn\n" | |
426 | if length($warn) > 0; | |
5a63f1c5 WB |
427 | return ''; |
428 | } | |
429 | ||
430 | # Privileged containers keep using the default (which is already part of | |
431 | # the files included via lxc.include, so we don't need to write it out, | |
432 | # that way it stays admin-configurable via /usr/share/lxc/config/... as | |
433 | # well) | |
434 | return '' if !$unprivileged; | |
435 | ||
2df08734 WB |
436 | my $rules = { |
437 | keyctl => ['errno 38'], | |
438 | }; | |
439 | ||
440 | my $raw_conf = ''; | |
441 | ||
5a63f1c5 WB |
442 | # Unprivileged containers will get keyctl() disabled by default as a |
443 | # workaround for systemd-networkd behavior. But we have an option to | |
444 | # explicitly enable it: | |
2df08734 WB |
445 | if ($features->{keyctl}) { |
446 | delete $rules->{keyctl}; | |
447 | } | |
448 | ||
449 | # By default, unprivileged containers cannot use `mknod` at all. | |
450 | # Since lxc 3.2, we can use seccomp's trap to userspace feature for this, | |
451 | # but for now this is experimental, so it has to be enabled via a feature | |
452 | # flag. | |
453 | # Note that we only handle block and char devices (like lxd), the rest we | |
454 | # leave up to the kernel. We may in the future remove this if seccomp gets | |
455 | # a way to tell the kernel to "continue" a syscall. | |
456 | if ($features->{mknod}) { | |
b6bbd32c WB |
457 | my ($ok, $kernel) = PVE::ProcFSTools::check_kernel_release(5, 3); |
458 | if (!$ok) { | |
459 | die "'mknod' feature requested, but kernel too old (found $kernel, required >= 5.3)\n"; | |
460 | } | |
461 | ||
2df08734 | 462 | $raw_conf .= "lxc.seccomp.notify.proxy = unix:/run/pve/lxc-syscalld.sock\n"; |
fb766003 | 463 | $raw_conf .= "lxc.seccomp.notify.cookie = $vmid\n"; |
2df08734 WB |
464 | |
465 | $rules->{mknod} = [ | |
466 | # condition: (mode & S_IFMT) == S_IFCHR | |
467 | 'notify [1,8192,SCMP_CMP_MASKED_EQ,61440]', | |
468 | # condition: (mode & S_IFMT) == S_IFBLK | |
469 | 'notify [1,24576,SCMP_CMP_MASKED_EQ,61440]', | |
470 | ]; | |
471 | $rules->{mknodat} = [ | |
472 | # condition: (mode & S_IFMT) == S_IFCHR | |
473 | 'notify [2,8192,SCMP_CMP_MASKED_EQ,61440]', | |
474 | # condition: (mode & S_IFMT) == S_IFBLK | |
475 | 'notify [2,24576,SCMP_CMP_MASKED_EQ,61440]', | |
476 | ]; | |
477 | } | |
478 | ||
479 | # Now build the custom seccomp rule text... | |
480 | my $extra_rules = join("\n", map { | |
481 | my $syscall = $_; | |
482 | map { "$syscall $_" } $rules->{$syscall}->@* | |
483 | } sort keys %$rules) . "\n"; | |
484 | ||
485 | return $raw_conf if $extra_rules eq "\n"; | |
486 | ||
487 | # We still have the "most common" config readily available, so don't write | |
488 | # out that one: | |
489 | if ($raw_conf eq '' && $extra_rules eq "keyctl errno 38\n") { | |
490 | # we have no extra $raw_conf and use the same we had in pve 6.1: | |
491 | return "lxc.seccomp.profile = $LXC_CONFIG_PATH/pve-userns.seccomp\n"; | |
492 | } | |
493 | ||
494 | # Write the rule file to the container's config path: | |
495 | my $rule_file = "$conf_dir/rules.seccomp"; | |
496 | my $rule_data = file_get_contents("$LXC_CONFIG_PATH/common.seccomp") | |
497 | . $extra_rules; | |
498 | file_set_contents($rule_file, $rule_data); | |
499 | $raw_conf .= "lxc.seccomp.profile = $rule_file\n"; | |
5a63f1c5 | 500 | |
2df08734 | 501 | return $raw_conf; |
5a63f1c5 WB |
502 | } |
503 | ||
504 | # Since lxc-3.0.2 we can have lxc generate a profile for the container | |
505 | # automatically. The default should be equivalent to the old | |
506 | # `lxc-container-default-cgns` profile. | |
507 | # | |
508 | # Additionally this also added `lxc.apparmor.raw` which can be used to inject | |
509 | # additional lines into the profile. We can use that to allow mounting specific | |
510 | # file systems. | |
511 | sub make_apparmor_config { | |
512 | my ($conf, $unprivileged, $features) = @_; | |
513 | ||
514 | # user-configured profile has precedence, but first we go through our own | |
515 | # code to figure out whether we should warn the user: | |
516 | ||
517 | my $raw = "lxc.apparmor.profile = generated\n"; | |
518 | my @profile_uses; | |
519 | ||
96f8d2a2 WB |
520 | if ($features->{fuse}) { |
521 | # For the informational warning: | |
522 | push @profile_uses, 'features:fuse'; | |
523 | } | |
524 | ||
5a63f1c5 WB |
525 | # There's lxc.apparmor.allow_nesting now, which will add the necessary |
526 | # apparmor lines, create an apparmor namespace for the container, but also | |
527 | # adds proc and sysfs mounts to /dev/.lxc/{proc,sys}. These do not have | |
528 | # lxcfs mounted over them, because that would prevent the container from | |
529 | # mounting new instances of them for nested containers. | |
530 | if ($features->{nesting}) { | |
531 | push @profile_uses, 'features:nesting'; | |
532 | $raw .= "lxc.apparmor.allow_nesting = 1\n" | |
533 | } else { | |
534 | # In the default profile in /etc/apparmor.d we patch this in because | |
535 | # otherwise a container can for example run `chown` on /sys, breaking | |
536 | # access to it for non-CAP_DAC_OVERRIDE tools on the host: | |
537 | $raw .= "lxc.apparmor.raw = deny mount -> /proc/,\n"; | |
538 | $raw .= "lxc.apparmor.raw = deny mount -> /sys/,\n"; | |
539 | # Preferably we could use the 'remount' flag but this does not sit well | |
540 | # with apparmor_parser currently: | |
541 | # mount options=(rw, nosuid, nodev, noexec, remount) -> /sys/, | |
542 | } | |
543 | ||
544 | if (my $mount = $features->{mount}) { | |
545 | push @profile_uses, 'features:mount'; | |
546 | foreach my $fs (PVE::Tools::split_list($mount)) { | |
547 | $raw .= "lxc.apparmor.raw = mount fstype=$fs,\n"; | |
548 | } | |
549 | } | |
550 | ||
551 | # More to come? | |
552 | ||
553 | if (PVE::LXC::Config->has_lxc_entry($conf, 'lxc.apparmor.profile')) { | |
554 | if (length(my $used = join(', ', @profile_uses))) { | |
555 | warn "explicitly configured lxc.apparmor.profile overrides the following settings: $used\n"; | |
556 | } | |
557 | return ''; | |
558 | } | |
559 | ||
560 | return $raw; | |
561 | } | |
562 | ||
27916659 | 563 | sub update_lxc_config { |
f91f3669 | 564 | my ($vmid, $conf) = @_; |
b80dd50a | 565 | |
bb1ac2de DM |
566 | my $dir = "/var/lib/lxc/$vmid"; |
567 | ||
568 | if ($conf->{template}) { | |
569 | ||
570 | unlink "$dir/config"; | |
571 | ||
572 | return; | |
573 | } | |
574 | ||
2bae8172 WB |
575 | my ($lxc_major, $lxc_minor) = get_lxc_version(); |
576 | ||
27916659 | 577 | my $raw = ''; |
b80dd50a | 578 | |
c37069e8 WB |
579 | if ($lxc_major >= 4) { |
580 | # Explicitly don't use relative directories, which is the default, but | |
581 | # note that we do this mostly because they are only applied for *some* | |
582 | # cgroups. Our pve-container@.service now starts lxc-start with `-F`, | |
583 | # so we also don't need to worry about the new monitor cgroup to | |
584 | # confuse systemd. | |
585 | $raw .= "lxc.cgroup.relative = 0\n"; | |
586 | ||
587 | # To make things easier, let's keep our previous cgroup layout and | |
588 | # simply move the monitor outside: | |
589 | $raw .= "lxc.cgroup.dir.monitor = lxc.monitor/$vmid\n"; | |
590 | # cgroup namespace separation for stronger limits: | |
e532a362 WB |
591 | $raw .= "lxc.cgroup.dir.container = lxc/$vmid\n"; |
592 | $raw .= "lxc.cgroup.dir.container.inner = ns\n"; | |
c37069e8 WB |
593 | } |
594 | ||
27916659 DM |
595 | die "missing 'arch' - internal error" if !$conf->{arch}; |
596 | $raw .= "lxc.arch = $conf->{arch}\n"; | |
b80dd50a | 597 | |
5a63f1c5 WB |
598 | my $custom_idmap = PVE::LXC::Config->has_lxc_entry($conf, 'lxc.idmap'); |
599 | my $unprivileged = $conf->{unprivileged} || $custom_idmap; | |
425b62cb | 600 | |
27916659 | 601 | my $ostype = $conf->{ostype} || die "missing 'ostype' - internal error"; |
866e0611 | 602 | |
059f7bb4 WB |
603 | my $cfgpath = '/usr/share/lxc/config'; |
604 | my $inc = "$cfgpath/$ostype.common.conf"; | |
605 | $inc ="$cfgpath/common.conf" if !-f $inc; | |
866e0611 | 606 | $raw .= "lxc.include = $inc\n"; |
5a63f1c5 | 607 | if ($unprivileged) { |
059f7bb4 WB |
608 | $inc = "$cfgpath/$ostype.userns.conf"; |
609 | $inc = "$cfgpath/userns.conf" if !-f $inc; | |
610 | $raw .= "lxc.include = $inc\n"; | |
27916659 | 611 | } |
b80dd50a | 612 | |
5a63f1c5 WB |
613 | my $features = PVE::LXC::Config->parse_features($conf->{features}); |
614 | ||
fb766003 | 615 | $raw .= make_seccomp_config($conf, $vmid, $dir, $unprivileged, $features); |
5a63f1c5 | 616 | $raw .= make_apparmor_config($conf, $unprivileged, $features); |
96f8d2a2 WB |
617 | if ($features->{fuse}) { |
618 | $raw .= "lxc.apparmor.raw = mount fstype=fuse,\n"; | |
619 | $raw .= "lxc.mount.entry = /dev/fuse dev/fuse none bind,create=file 0 0\n"; | |
620 | } | |
5a63f1c5 | 621 | |
741b7737 TL |
622 | if ($unprivileged && !$features->{force_rw_sys}) { |
623 | # unpriv. CT default to sys:rw, but that doesn't always plays well with | |
624 | # systemd, e.g., systemd-networkd https://systemd.io/CONTAINER_INTERFACE/ | |
625 | $raw .= "lxc.mount.auto = sys:mixed\n"; | |
626 | } | |
627 | ||
50df544c WB |
628 | # WARNING: DO NOT REMOVE this without making sure that loop device nodes |
629 | # cannot be exposed to the container with r/w access (cgroup perms). | |
630 | # When this is enabled mounts will still remain in the monitor's namespace | |
631 | # after the container unmounted them and thus will not detach from their | |
632 | # files while the container is running! | |
c16b8890 | 633 | $raw .= "lxc.monitor.unshare = 1\n"; |
58cc92a9 | 634 | |
0b6a2f0e WB |
635 | my $cgv1 = get_cgroup_subsystems(); |
636 | ||
425b62cb WB |
637 | # Should we read them from /etc/subuid? |
638 | if ($unprivileged && !$custom_idmap) { | |
108c6cab WB |
639 | $raw .= "lxc.idmap = u 0 100000 65536\n"; |
640 | $raw .= "lxc.idmap = g 0 100000 65536\n"; | |
425b62cb WB |
641 | } |
642 | ||
d250604f | 643 | if (!PVE::LXC::Config->has_dev_console($conf)) { |
108c6cab | 644 | $raw .= "lxc.console.path = none\n"; |
0b6a2f0e | 645 | $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n" if $cgv1->{devices}; |
eeaea429 | 646 | } |
4f958489 | 647 | |
1b4cf758 | 648 | my $ttycount = PVE::LXC::Config->get_tty_count($conf); |
108c6cab | 649 | $raw .= "lxc.tty.max = $ttycount\n"; |
cbb03fea | 650 | |
c31ad455 | 651 | # some init scripts expect a linux terminal (turnkey). |
a691a5a3 DM |
652 | $raw .= "lxc.environment = TERM=linux\n"; |
653 | ||
27916659 | 654 | my $utsname = $conf->{hostname} || "CT$vmid"; |
108c6cab | 655 | $raw .= "lxc.uts.name = $utsname\n"; |
cbb03fea | 656 | |
0b6a2f0e WB |
657 | if ($cgv1->{memory}) { |
658 | my $memory = $conf->{memory} || 512; | |
659 | my $swap = $conf->{swap} // 0; | |
a12a36e0 | 660 | |
0b6a2f0e WB |
661 | my $lxcmem = int($memory*1024*1024); |
662 | $raw .= "lxc.cgroup.memory.limit_in_bytes = $lxcmem\n"; | |
27916659 | 663 | |
0b6a2f0e WB |
664 | my $lxcswap = int(($memory + $swap)*1024*1024); |
665 | $raw .= "lxc.cgroup.memory.memsw.limit_in_bytes = $lxcswap\n"; | |
a12a36e0 WL |
666 | } |
667 | ||
0b6a2f0e WB |
668 | if ($cgv1->{cpu}) { |
669 | if (my $cpulimit = $conf->{cpulimit}) { | |
670 | $raw .= "lxc.cgroup.cpu.cfs_period_us = 100000\n"; | |
671 | my $value = int(100000*$cpulimit); | |
672 | $raw .= "lxc.cgroup.cpu.cfs_quota_us = $value\n"; | |
673 | } | |
674 | ||
675 | my $shares = $conf->{cpuunits} || 1024; | |
676 | $raw .= "lxc.cgroup.cpu.shares = $shares\n"; | |
677 | } | |
27916659 | 678 | |
fddaa91b DM |
679 | die "missing 'rootfs' configuration\n" |
680 | if !defined($conf->{rootfs}); | |
681 | ||
e4034859 | 682 | my $mountpoint = PVE::LXC::Config->parse_volume('rootfs', $conf->{rootfs}); |
a3076d81 | 683 | |
108c6cab | 684 | $raw .= "lxc.rootfs.path = $dir/rootfs\n"; |
27916659 | 685 | |
e756bdd6 | 686 | foreach my $k (sort keys %$conf) { |
27916659 DM |
687 | next if $k !~ m/^net(\d+)$/; |
688 | my $ind = $1; | |
1b4cf758 | 689 | my $d = PVE::LXC::Config->parse_lxc_network($conf->{$k}); |
108c6cab WB |
690 | $raw .= "lxc.net.$ind.type = veth\n"; |
691 | $raw .= "lxc.net.$ind.veth.pair = veth${vmid}i${ind}\n"; | |
692 | $raw .= "lxc.net.$ind.hwaddr = $d->{hwaddr}\n" if defined($d->{hwaddr}); | |
693 | $raw .= "lxc.net.$ind.name = $d->{name}\n" if defined($d->{name}); | |
694 | $raw .= "lxc.net.$ind.mtu = $d->{mtu}\n" if defined($d->{mtu}); | |
2bae8172 WB |
695 | |
696 | # Starting with lxc 4.0, we do not patch lxc to execute our up-scripts. | |
697 | if ($lxc_major >= 4) { | |
698 | $raw .= "lxc.net.$ind.script.up = /usr/share/lxc/lxcnetaddbr\n"; | |
699 | } | |
a12a36e0 WL |
700 | } |
701 | ||
42b51c01 WB |
702 | my $had_cpuset = 0; |
703 | if (my $lxcconf = $conf->{lxc}) { | |
704 | foreach my $entry (@$lxcconf) { | |
705 | my ($k, $v) = @$entry; | |
2222f9f4 | 706 | $had_cpuset = 1 if $k eq 'lxc.cgroup.cpuset.cpus' || $k eq 'lxc.cgroup2.cpuset.cpus'; |
42b51c01 | 707 | $raw .= "$k = $v\n"; |
e576f689 | 708 | } |
42b51c01 | 709 | } |
27916659 | 710 | |
42b51c01 | 711 | my $cpuset; |
85ccb17f | 712 | my ($cpuset_cgroup, $cpuset_version) = eval { PVE::CGroup::cpuset_controller_path() }; |
42b51c01 WB |
713 | if (defined($cpuset_cgroup)) { |
714 | $cpuset = eval { PVE::CpuSet->new_from_path("$cpuset_cgroup/lxc", 1) } | |
715 | || PVE::CpuSet->new_from_path($cpuset_cgroup, 1); | |
716 | } | |
717 | my $cores = $conf->{cores}; | |
718 | if (!$had_cpuset && $cores && $cpuset) { | |
719 | my @members = $cpuset->members(); | |
720 | while (scalar(@members) > $cores) { | |
721 | my $randidx = int(rand(scalar(@members))); | |
722 | $cpuset->delete($members[$randidx]); | |
723 | splice(@members, $randidx, 1); # keep track of the changes | |
92902047 | 724 | } |
4c97a31d WB |
725 | my $ver = $cpuset_version == 1 ? '' : '2'; |
726 | $raw .= "lxc.cgroup$ver.cpuset.cpus = ".$cpuset->short_string()."\n"; | |
92902047 | 727 | } |
0b6a2f0e | 728 | |
27916659 DM |
729 | File::Path::mkpath("$dir/rootfs"); |
730 | ||
731 | PVE::Tools::file_set_contents("$dir/config", $raw); | |
b80dd50a DM |
732 | } |
733 | ||
117636e5 DM |
734 | # verify and cleanup nameserver list (replace \0 with ' ') |
735 | sub verify_nameserver_list { | |
736 | my ($nameserver_list) = @_; | |
737 | ||
738 | my @list = (); | |
739 | foreach my $server (PVE::Tools::split_list($nameserver_list)) { | |
08a58f12 | 740 | PVE::LXC::Config::verify_ip_with_ll_iface($server); |
117636e5 DM |
741 | push @list, $server; |
742 | } | |
743 | ||
744 | return join(' ', @list); | |
745 | } | |
746 | ||
747 | sub verify_searchdomain_list { | |
748 | my ($searchdomain_list) = @_; | |
749 | ||
750 | my @list = (); | |
751 | foreach my $server (PVE::Tools::split_list($searchdomain_list)) { | |
752 | # todo: should we add checks for valid dns domains? | |
753 | push @list, $server; | |
754 | } | |
755 | ||
756 | return join(' ', @list); | |
757 | } | |
758 | ||
aca816ad | 759 | sub get_console_command { |
65213b67 | 760 | my ($vmid, $conf, $escapechar) = @_; |
39413635 | 761 | |
65213b67 TM |
762 | # '-1' as $escapechar disables keyboard escape sequence |
763 | # any other passed char (a-z) will result in <Ctrl+$escapechar q> | |
aca816ad | 764 | |
1b4cf758 | 765 | my $cmode = PVE::LXC::Config->get_cmode($conf); |
aca816ad | 766 | |
4d494664 | 767 | my $cmd = []; |
aca816ad | 768 | if ($cmode eq 'console') { |
4d494664 | 769 | push @$cmd, 'lxc-console', '-n', $vmid, '-t', 0; |
65213b67 | 770 | push @$cmd, '-e', $escapechar if $escapechar; |
aca816ad | 771 | } elsif ($cmode eq 'tty') { |
4d494664 | 772 | push @$cmd, 'lxc-console', '-n', $vmid; |
65213b67 | 773 | push @$cmd, '-e', $escapechar if $escapechar; |
aca816ad | 774 | } elsif ($cmode eq 'shell') { |
4d494664 | 775 | push @$cmd, 'lxc-attach', '--clear-env', '-n', $vmid; |
aca816ad DM |
776 | } else { |
777 | die "internal error"; | |
778 | } | |
4d494664 DC |
779 | |
780 | return $cmd; | |
aca816ad DM |
781 | } |
782 | ||
c325b32f DM |
783 | sub get_primary_ips { |
784 | my ($conf) = @_; | |
785 | ||
786 | # return data from net0 | |
cbb03fea | 787 | |
27916659 | 788 | return undef if !defined($conf->{net0}); |
1b4cf758 | 789 | my $net = PVE::LXC::Config->parse_lxc_network($conf->{net0}); |
c325b32f DM |
790 | |
791 | my $ipv4 = $net->{ip}; | |
db78a181 WB |
792 | if ($ipv4) { |
793 | if ($ipv4 =~ /^(dhcp|manual)$/) { | |
794 | $ipv4 = undef | |
795 | } else { | |
796 | $ipv4 =~ s!/\d+$!!; | |
797 | } | |
798 | } | |
65e5eaa3 | 799 | my $ipv6 = $net->{ip6}; |
db78a181 | 800 | if ($ipv6) { |
5f291c7d | 801 | if ($ipv6 =~ /^(auto|dhcp|manual)$/) { |
db78a181 WB |
802 | $ipv6 = undef; |
803 | } else { | |
804 | $ipv6 =~ s!/\d+$!!; | |
805 | } | |
806 | } | |
cbb03fea | 807 | |
c325b32f DM |
808 | return ($ipv4, $ipv6); |
809 | } | |
148d1cb4 | 810 | |
b407293b WB |
811 | sub delete_mountpoint_volume { |
812 | my ($storage_cfg, $vmid, $volume) = @_; | |
813 | ||
d250604f | 814 | return if PVE::LXC::Config->classify_mountpoint($volume) ne 'volume'; |
b407293b WB |
815 | |
816 | my ($vtype, $name, $owner) = PVE::Storage::parse_volname($storage_cfg, $volume); | |
6b81ef77 TL |
817 | |
818 | if ($vmid == $owner) { | |
819 | PVE::Storage::vdisk_free($storage_cfg, $volume); | |
820 | } else { | |
821 | warn "ignore deletion of '$volume', CT $vmid isn't the owner!\n"; | |
822 | } | |
b407293b | 823 | } |
ef241384 | 824 | |
27916659 | 825 | sub destroy_lxc_container { |
bccaa371 | 826 | my ($storage_cfg, $vmid, $conf, $replacement_conf) = @_; |
148d1cb4 | 827 | |
5ff9e9c1 | 828 | PVE::LXC::Config->foreach_volume_full($conf, {include_unused => 1}, sub { |
db8989e1 | 829 | my ($ms, $mountpoint) = @_; |
b407293b | 830 | delete_mountpoint_volume($storage_cfg, $vmid, $mountpoint->{volume}); |
db8989e1 WB |
831 | }); |
832 | ||
27916659 DM |
833 | rmdir "/var/lib/lxc/$vmid/rootfs"; |
834 | unlink "/var/lib/lxc/$vmid/config"; | |
835 | rmdir "/var/lib/lxc/$vmid"; | |
bccaa371 FG |
836 | if (defined $replacement_conf) { |
837 | PVE::LXC::Config->write_config($vmid, $replacement_conf); | |
838 | } else { | |
4eeb9af1 | 839 | PVE::LXC::Config->destroy_config($vmid); |
bccaa371 | 840 | } |
148d1cb4 | 841 | } |
68fba17b | 842 | |
ef241384 | 843 | sub vm_stop_cleanup { |
5fa890f0 | 844 | my ($storage_cfg, $vmid, $conf, $keepActive) = @_; |
bf9d912c | 845 | |
38e7891a TL |
846 | return if $keepActive; |
847 | ||
848 | eval { | |
849 | my $vollist = PVE::LXC::Config->get_vm_volumes($conf); | |
850 | PVE::Storage::deactivate_volumes($storage_cfg, $vollist); | |
ef241384 DM |
851 | }; |
852 | warn $@ if $@; # avoid errors - just warn | |
853 | } | |
854 | ||
93cdbbfb | 855 | sub update_net { |
bedeaaf1 | 856 | my ($vmid, $conf, $opt, $newnet, $netid, $rootdir) = @_; |
93cdbbfb | 857 | |
18862537 WB |
858 | if ($newnet->{type} ne 'veth') { |
859 | # for when there are physical interfaces | |
860 | die "cannot update interface of type $newnet->{type}"; | |
861 | } | |
862 | ||
863 | my $veth = "veth${vmid}i${netid}"; | |
93cdbbfb AD |
864 | my $eth = $newnet->{name}; |
865 | ||
18862537 | 866 | if (my $oldnetcfg = $conf->{$opt}) { |
1b4cf758 | 867 | my $oldnet = PVE::LXC::Config->parse_lxc_network($oldnetcfg); |
18862537 | 868 | |
2ae004ec OB |
869 | if (safe_string_ne($oldnet->{hwaddr}, $newnet->{hwaddr}) || |
870 | safe_string_ne($oldnet->{name}, $newnet->{name})) { | |
93cdbbfb | 871 | |
18862537 | 872 | PVE::Network::veth_delete($veth); |
bedeaaf1 | 873 | delete $conf->{$opt}; |
67afe46e | 874 | PVE::LXC::Config->write_config($vmid, $conf); |
93cdbbfb | 875 | |
18862537 | 876 | hotplug_net($vmid, $conf, $opt, $newnet, $netid); |
bedeaaf1 | 877 | |
380962c7 | 878 | } else { |
2ae004ec OB |
879 | if (safe_string_ne($oldnet->{bridge}, $newnet->{bridge}) || |
880 | safe_num_ne($oldnet->{tag}, $newnet->{tag}) || | |
881 | safe_num_ne($oldnet->{firewall}, $newnet->{firewall})) { | |
bedeaaf1 | 882 | |
18862537 | 883 | if ($oldnet->{bridge}) { |
bedeaaf1 | 884 | PVE::Network::tap_unplug($veth); |
18862537 WB |
885 | foreach (qw(bridge tag firewall)) { |
886 | delete $oldnet->{$_}; | |
887 | } | |
1b4cf758 | 888 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet); |
67afe46e | 889 | PVE::LXC::Config->write_config($vmid, $conf); |
bedeaaf1 | 890 | } |
93cdbbfb | 891 | |
a1ff8c37 | 892 | if ($have_sdn) { |
ab2ec461 AD |
893 | PVE::Network::SDN::Zones::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}); |
894 | } else { | |
895 | PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}); | |
896 | } | |
897 | ||
380962c7 WB |
898 | # This includes the rate: |
899 | foreach (qw(bridge tag firewall rate)) { | |
18862537 WB |
900 | $oldnet->{$_} = $newnet->{$_} if $newnet->{$_}; |
901 | } | |
2ae004ec | 902 | } elsif (safe_string_ne($oldnet->{rate}, $newnet->{rate})) { |
380962c7 WB |
903 | # Rate can be applied on its own but any change above needs to |
904 | # include the rate in tap_plug since OVS resets everything. | |
905 | PVE::Network::tap_rate_limit($veth, $newnet->{rate}); | |
906 | $oldnet->{rate} = $newnet->{rate} | |
907 | } | |
908 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($oldnet); | |
909 | PVE::LXC::Config->write_config($vmid, $conf); | |
93cdbbfb AD |
910 | } |
911 | } else { | |
18862537 | 912 | hotplug_net($vmid, $conf, $opt, $newnet, $netid); |
93cdbbfb AD |
913 | } |
914 | ||
bedeaaf1 | 915 | update_ipconfig($vmid, $conf, $opt, $eth, $newnet, $rootdir); |
93cdbbfb AD |
916 | } |
917 | ||
918 | sub hotplug_net { | |
18862537 | 919 | my ($vmid, $conf, $opt, $newnet, $netid) = @_; |
93cdbbfb | 920 | |
18862537 | 921 | my $veth = "veth${vmid}i${netid}"; |
cbb03fea | 922 | my $vethpeer = $veth . "p"; |
93cdbbfb AD |
923 | my $eth = $newnet->{name}; |
924 | ||
a1ff8c37 | 925 | if ($have_sdn) { |
ab2ec461 AD |
926 | PVE::Network::SDN::Zones::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr}); |
927 | PVE::Network::SDN::Zones::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}); | |
928 | } else { | |
929 | PVE::Network::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr}); | |
930 | PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate}); | |
931 | } | |
93cdbbfb | 932 | |
cbb03fea | 933 | # attach peer in container |
93cdbbfb AD |
934 | my $cmd = ['lxc-device', '-n', $vmid, 'add', $vethpeer, "$eth" ]; |
935 | PVE::Tools::run_command($cmd); | |
936 | ||
cbb03fea | 937 | # link up peer in container |
93cdbbfb AD |
938 | $cmd = ['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', '/sbin/ip', 'link', 'set', $eth ,'up' ]; |
939 | PVE::Tools::run_command($cmd); | |
bedeaaf1 | 940 | |
18862537 WB |
941 | my $done = { type => 'veth' }; |
942 | foreach (qw(bridge tag firewall hwaddr name)) { | |
943 | $done->{$_} = $newnet->{$_} if $newnet->{$_}; | |
944 | } | |
1b4cf758 | 945 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($done); |
bedeaaf1 | 946 | |
67afe46e | 947 | PVE::LXC::Config->write_config($vmid, $conf); |
93cdbbfb AD |
948 | } |
949 | ||
68a05bb3 | 950 | sub update_ipconfig { |
bedeaaf1 AD |
951 | my ($vmid, $conf, $opt, $eth, $newnet, $rootdir) = @_; |
952 | ||
f2104b80 | 953 | my $lxc_setup = PVE::LXC::Setup->new($conf, $rootdir); |
bedeaaf1 | 954 | |
1b4cf758 | 955 | my $optdata = PVE::LXC::Config->parse_lxc_network($conf->{$opt}); |
84e0c123 WB |
956 | my $deleted = []; |
957 | my $added = []; | |
8d723477 WB |
958 | my $nscmd = sub { |
959 | my $cmdargs = shift; | |
960 | PVE::Tools::run_command(['lxc-attach', '-n', $vmid, '-s', 'NETWORK', '--', @_], %$cmdargs); | |
84e0c123 | 961 | }; |
8d723477 | 962 | my $ipcmd = sub { &$nscmd({}, '/sbin/ip', @_) }; |
2bfd1615 | 963 | |
84e0c123 | 964 | my $change_ip_config = sub { |
f39002a6 DM |
965 | my ($ipversion) = @_; |
966 | ||
967 | my $family_opt = "-$ipversion"; | |
968 | my $suffix = $ipversion == 4 ? '' : $ipversion; | |
84e0c123 WB |
969 | my $gw= "gw$suffix"; |
970 | my $ip= "ip$suffix"; | |
bedeaaf1 | 971 | |
6178b0dd WB |
972 | my $newip = $newnet->{$ip}; |
973 | my $newgw = $newnet->{$gw}; | |
974 | my $oldip = $optdata->{$ip}; | |
ded5d25a | 975 | my $oldgw = $optdata->{$gw}; |
6178b0dd | 976 | |
2ae004ec OB |
977 | my $change_ip = safe_string_ne($oldip, $newip); |
978 | my $change_gw = safe_string_ne($oldgw, $newgw); | |
bedeaaf1 | 979 | |
84e0c123 | 980 | return if !$change_ip && !$change_gw; |
68a05bb3 | 981 | |
84e0c123 | 982 | # step 1: add new IP, if this fails we cancel |
292aff54 WB |
983 | my $is_real_ip = ($newip && $newip !~ /^(?:auto|dhcp|manual)$/); |
984 | if ($change_ip && $is_real_ip) { | |
8d723477 | 985 | eval { &$ipcmd($family_opt, 'addr', 'add', $newip, 'dev', $eth); }; |
84e0c123 WB |
986 | if (my $err = $@) { |
987 | warn $err; | |
988 | return; | |
989 | } | |
bedeaaf1 | 990 | } |
bedeaaf1 | 991 | |
84e0c123 WB |
992 | # step 2: replace gateway |
993 | # If this fails we delete the added IP and cancel. | |
994 | # If it succeeds we save the config and delete the old IP, ignoring | |
995 | # errors. The config is then saved. | |
996 | # Note: 'ip route replace' can add | |
997 | if ($change_gw) { | |
6178b0dd | 998 | if ($newgw) { |
292aff54 WB |
999 | eval { |
1000 | if ($is_real_ip && !PVE::Network::is_ip_in_cidr($newgw, $newip, $ipversion)) { | |
1001 | &$ipcmd($family_opt, 'route', 'add', $newgw, 'dev', $eth); | |
1002 | } | |
1003 | &$ipcmd($family_opt, 'route', 'replace', 'default', 'via', $newgw); | |
1004 | }; | |
84e0c123 WB |
1005 | if (my $err = $@) { |
1006 | warn $err; | |
1007 | # the route was not replaced, the old IP is still available | |
1008 | # rollback (delete new IP) and cancel | |
1009 | if ($change_ip) { | |
8d723477 | 1010 | eval { &$ipcmd($family_opt, 'addr', 'del', $newip, 'dev', $eth); }; |
84e0c123 WB |
1011 | warn $@ if $@; # no need to die here |
1012 | } | |
1013 | return; | |
1014 | } | |
1015 | } else { | |
8d723477 | 1016 | eval { &$ipcmd($family_opt, 'route', 'del', 'default'); }; |
84e0c123 WB |
1017 | # if the route was not deleted, the guest might have deleted it manually |
1018 | # warn and continue | |
1019 | warn $@ if $@; | |
1020 | } | |
ded5d25a DL |
1021 | if ($oldgw && $oldip && !PVE::Network::is_ip_in_cidr($oldgw, $oldip)) { |
1022 | eval { &$ipcmd($family_opt, 'route', 'del', $oldgw, 'dev', $eth); }; | |
1023 | # warn if the route was deleted manually | |
1024 | warn $@ if $@; | |
1025 | } | |
2bfd1615 | 1026 | } |
2bfd1615 | 1027 | |
6178b0dd | 1028 | # from this point on we save the configuration |
84e0c123 | 1029 | # step 3: delete old IP ignoring errors |
6178b0dd | 1030 | if ($change_ip && $oldip && $oldip !~ /^(?:auto|dhcp)$/) { |
8d723477 WB |
1031 | # We need to enable promote_secondaries, otherwise our newly added |
1032 | # address will be removed along with the old one. | |
1033 | my $promote = 0; | |
1034 | eval { | |
1035 | if ($ipversion == 4) { | |
1036 | &$nscmd({ outfunc => sub { $promote = int(shift) } }, | |
1037 | 'cat', "/proc/sys/net/ipv4/conf/$eth/promote_secondaries"); | |
1038 | &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=1"); | |
1039 | } | |
1040 | &$ipcmd($family_opt, 'addr', 'del', $oldip, 'dev', $eth); | |
1041 | }; | |
84e0c123 | 1042 | warn $@ if $@; # no need to die here |
8d723477 WB |
1043 | |
1044 | if ($ipversion == 4) { | |
1045 | &$nscmd({}, 'sysctl', "net.ipv4.conf.$eth.promote_secondaries=$promote"); | |
1046 | } | |
bedeaaf1 AD |
1047 | } |
1048 | ||
84e0c123 WB |
1049 | foreach my $property ($ip, $gw) { |
1050 | if ($newnet->{$property}) { | |
1051 | $optdata->{$property} = $newnet->{$property}; | |
1052 | } else { | |
1053 | delete $optdata->{$property}; | |
1054 | } | |
bedeaaf1 | 1055 | } |
1b4cf758 | 1056 | $conf->{$opt} = PVE::LXC::Config->print_lxc_network($optdata); |
67afe46e | 1057 | PVE::LXC::Config->write_config($vmid, $conf); |
84e0c123 WB |
1058 | $lxc_setup->setup_network($conf); |
1059 | }; | |
bedeaaf1 | 1060 | |
f39002a6 DM |
1061 | &$change_ip_config(4); |
1062 | &$change_ip_config(6); | |
489e960d WL |
1063 | |
1064 | } | |
1065 | ||
9a14c1fa WB |
1066 | my $open_namespace = sub { |
1067 | my ($vmid, $pid, $kind) = @_; | |
1068 | sysopen my $fd, "/proc/$pid/ns/$kind", O_RDONLY | |
1069 | or die "failed to open $kind namespace of container $vmid: $!\n"; | |
1070 | return $fd; | |
1071 | }; | |
1072 | ||
34fdb3d7 | 1073 | my $enter_namespace = sub { |
9a14c1fa WB |
1074 | my ($vmid, $pid, $kind, $type) = @_; |
1075 | my $fd = $open_namespace->($vmid, $pid, $kind); | |
34fdb3d7 | 1076 | PVE::Tools::setns(fileno($fd), $type) |
9a14c1fa | 1077 | or die "failed to enter $kind namespace of container $vmid: $!\n"; |
34fdb3d7 WB |
1078 | close $fd; |
1079 | }; | |
1080 | ||
418b94fe WB |
1081 | my $get_container_namespace = sub { |
1082 | my ($vmid, $pid, $kind) = @_; | |
1083 | ||
1084 | my $pidfd; | |
1085 | if (!defined($pid)) { | |
1086 | # Pin the pid while we're grabbing its stuff from /proc | |
1087 | ($pid, $pidfd) = open_lxc_pid($vmid) | |
1088 | or die "failed to open pidfd of container $vmid\'s init process\n"; | |
1089 | } | |
1090 | ||
1091 | return $open_namespace->($vmid, $pid, $kind); | |
1092 | }; | |
1093 | ||
34fdb3d7 WB |
1094 | my $do_syncfs = sub { |
1095 | my ($vmid, $pid, $socket) = @_; | |
1096 | ||
1097 | &$enter_namespace($vmid, $pid, 'mnt', PVE::Tools::CLONE_NEWNS); | |
1098 | ||
1099 | # Tell the parent process to start reading our /proc/mounts | |
1100 | print {$socket} "go\n"; | |
1101 | $socket->flush(); | |
1102 | ||
1103 | # Receive /proc/self/mounts | |
1104 | my $mountdata = do { local $/ = undef; <$socket> }; | |
1105 | close $socket; | |
1106 | ||
0c0be8e4 SI |
1107 | my %nosyncfs = ( |
1108 | cgroup => 1, | |
1109 | cgroup2 => 1, | |
1110 | devtmpfs => 1, | |
1111 | devpts => 1, | |
1112 | 'fuse.lxcfs' => 1, | |
1113 | fusectl => 1, | |
1114 | mqueue => 1, | |
1115 | proc => 1, | |
1116 | sysfs => 1, | |
1117 | tmpfs => 1, | |
1118 | ); | |
1119 | ||
34fdb3d7 WB |
1120 | # Now sync all mountpoints... |
1121 | my $mounts = PVE::ProcFSTools::parse_mounts($mountdata); | |
1122 | foreach my $mp (@$mounts) { | |
1123 | my ($what, $dir, $fs) = @$mp; | |
0c0be8e4 | 1124 | next if $nosyncfs{$fs}; |
34fdb3d7 WB |
1125 | eval { PVE::Tools::sync_mountpoint($dir); }; |
1126 | warn $@ if $@; | |
1127 | } | |
1128 | }; | |
1129 | ||
1130 | sub sync_container_namespace { | |
1131 | my ($vmid) = @_; | |
1132 | my $pid = find_lxc_pid($vmid); | |
1133 | ||
1134 | # SOCK_DGRAM is nicer for barriers but cannot be slurped | |
1135 | socketpair my $pfd, my $cfd, AF_UNIX, SOCK_STREAM, PF_UNSPEC | |
1136 | or die "failed to create socketpair: $!\n"; | |
1137 | ||
1138 | my $child = fork(); | |
1139 | die "fork failed: $!\n" if !defined($child); | |
1140 | ||
1141 | if (!$child) { | |
1142 | eval { | |
1143 | close $pfd; | |
1144 | &$do_syncfs($vmid, $pid, $cfd); | |
1145 | }; | |
1146 | if (my $err = $@) { | |
1147 | warn $err; | |
1148 | POSIX::_exit(1); | |
1149 | } | |
1150 | POSIX::_exit(0); | |
1151 | } | |
1152 | close $cfd; | |
1153 | my $go = <$pfd>; | |
1154 | die "failed to enter container namespace\n" if $go ne "go\n"; | |
1155 | ||
1156 | open my $mounts, '<', "/proc/$child/mounts" | |
1157 | or die "failed to open container's /proc/mounts: $!\n"; | |
1158 | my $mountdata = do { local $/ = undef; <$mounts> }; | |
1159 | close $mounts; | |
1160 | print {$pfd} $mountdata; | |
1161 | close $pfd; | |
1162 | ||
1163 | while (waitpid($child, 0) != $child) {} | |
1164 | die "failed to sync container namespace\n" if $? != 0; | |
1165 | } | |
1166 | ||
bb1ac2de DM |
1167 | sub template_create { |
1168 | my ($vmid, $conf) = @_; | |
1169 | ||
1170 | my $storecfg = PVE::Storage::config(); | |
1171 | ||
015740e6 | 1172 | PVE::LXC::Config->foreach_volume($conf, sub { |
9d1cb46b | 1173 | my ($ms, $mountpoint) = @_; |
bb1ac2de | 1174 | |
9d1cb46b | 1175 | my $volid = $mountpoint->{volume}; |
bb1ac2de | 1176 | |
9d1cb46b WL |
1177 | die "Template feature is not available for '$volid'\n" |
1178 | if !PVE::Storage::volume_has_feature($storecfg, 'template', $volid); | |
1179 | }); | |
bb1ac2de | 1180 | |
015740e6 | 1181 | PVE::LXC::Config->foreach_volume($conf, sub { |
9d1cb46b WL |
1182 | my ($ms, $mountpoint) = @_; |
1183 | ||
1184 | my $volid = $mountpoint->{volume}; | |
1185 | ||
1186 | PVE::Storage::activate_volumes($storecfg, [$volid]); | |
1187 | ||
1188 | my $template_volid = PVE::Storage::vdisk_create_base($storecfg, $volid); | |
1189 | $mountpoint->{volume} = $template_volid; | |
1190 | $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq "rootfs"); | |
1191 | }); | |
bb1ac2de | 1192 | |
67afe46e | 1193 | PVE::LXC::Config->write_config($vmid, $conf); |
bb1ac2de DM |
1194 | } |
1195 | ||
52389a07 | 1196 | sub check_ct_modify_config_perm { |
f1ba1a4b | 1197 | my ($rpcenv, $authuser, $vmid, $pool, $newconf, $delete) = @_; |
52389a07 | 1198 | |
c81f19d1 | 1199 | return 1 if $authuser eq 'root@pam'; |
52389a07 | 1200 | |
f1ba1a4b WB |
1201 | my $check = sub { |
1202 | my ($opt, $delete) = @_; | |
f2357408 | 1203 | if ($opt eq 'cores' || $opt eq 'cpuunits' || $opt eq 'cpulimit') { |
52389a07 | 1204 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.CPU']); |
e59a61ed | 1205 | } elsif ($opt eq 'rootfs' || $opt =~ /^mp\d+$/) { |
52389a07 | 1206 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk']); |
f1ba1a4b | 1207 | return if $delete; |
e4034859 | 1208 | my $data = PVE::LXC::Config->parse_volume($opt, $newconf->{$opt}); |
9d294016 FG |
1209 | raise_perm_exc("mount point type $data->{type} is only allowed for root\@pam") |
1210 | if $data->{type} ne 'volume'; | |
52389a07 DM |
1211 | } elsif ($opt eq 'memory' || $opt eq 'swap') { |
1212 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Memory']); | |
1213 | } elsif ($opt =~ m/^net\d+$/ || $opt eq 'nameserver' || | |
1214 | $opt eq 'searchdomain' || $opt eq 'hostname') { | |
1215 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Network']); | |
5a63f1c5 WB |
1216 | } elsif ($opt eq 'features') { |
1217 | # For now this is restricted to root@pam | |
1218 | raise_perm_exc("changing feature flags is only allowed for root\@pam"); | |
1a416433 DC |
1219 | } elsif ($opt eq 'hookscript') { |
1220 | # For now this is restricted to root@pam | |
1221 | raise_perm_exc("changing the hookscript is only allowed for root\@pam"); | |
52389a07 DM |
1222 | } else { |
1223 | $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Options']); | |
1224 | } | |
f1ba1a4b WB |
1225 | }; |
1226 | ||
1227 | foreach my $opt (keys %$newconf) { | |
1228 | &$check($opt, 0); | |
1229 | } | |
1230 | foreach my $opt (@$delete) { | |
1231 | &$check($opt, 1); | |
52389a07 DM |
1232 | } |
1233 | ||
1234 | return 1; | |
1235 | } | |
1236 | ||
9622e848 | 1237 | sub umount_all { |
da629848 | 1238 | my ($vmid, $storage_cfg, $conf, $noerr) = @_; |
9622e848 DM |
1239 | |
1240 | my $rootdir = "/var/lib/lxc/$vmid/rootfs"; | |
d250604f | 1241 | my $volid_list = PVE::LXC::Config->get_vm_volumes($conf); |
9622e848 | 1242 | |
73058b84 TL |
1243 | my $res = 1; |
1244 | ||
015740e6 | 1245 | PVE::LXC::Config->foreach_volume_full($conf, {'reverse' => 1}, sub { |
9622e848 DM |
1246 | my ($ms, $mountpoint) = @_; |
1247 | ||
1248 | my $volid = $mountpoint->{volume}; | |
1249 | my $mount = $mountpoint->{mp}; | |
1250 | ||
1251 | return if !$volid || !$mount; | |
1252 | ||
d18f96b4 | 1253 | my $mount_path = "$rootdir/$mount"; |
f845a93d | 1254 | $mount_path =~ s!/+!/!g; |
9622e848 | 1255 | |
228a5a1d WL |
1256 | return if !PVE::ProcFSTools::is_mounted($mount_path); |
1257 | ||
9622e848 | 1258 | eval { |
d18f96b4 | 1259 | PVE::Tools::run_command(['umount', '-d', $mount_path]); |
9622e848 DM |
1260 | }; |
1261 | if (my $err = $@) { | |
1262 | if ($noerr) { | |
73058b84 | 1263 | $res = 0; |
9622e848 DM |
1264 | warn $err; |
1265 | } else { | |
1266 | die $err; | |
1267 | } | |
1268 | } | |
1269 | }); | |
73058b84 TL |
1270 | |
1271 | return $res; # tell caller if (some) umounts failed for the noerr case | |
9622e848 DM |
1272 | } |
1273 | ||
1274 | sub mount_all { | |
25321b68 | 1275 | my ($vmid, $storage_cfg, $conf, $ignore_ro) = @_; |
9622e848 DM |
1276 | |
1277 | my $rootdir = "/var/lib/lxc/$vmid/rootfs"; | |
1adc7e53 | 1278 | File::Path::make_path($rootdir); |
9622e848 | 1279 | |
d250604f | 1280 | my $volid_list = PVE::LXC::Config->get_vm_volumes($conf); |
9622e848 DM |
1281 | PVE::Storage::activate_volumes($storage_cfg, $volid_list); |
1282 | ||
4c98d66c FG |
1283 | my (undef, $rootuid, $rootgid) = parse_id_maps($conf); |
1284 | ||
9622e848 | 1285 | eval { |
015740e6 | 1286 | PVE::LXC::Config->foreach_volume($conf, sub { |
9622e848 DM |
1287 | my ($ms, $mountpoint) = @_; |
1288 | ||
25321b68 FG |
1289 | $mountpoint->{ro} = 0 if $ignore_ro; |
1290 | ||
4c98d66c | 1291 | mountpoint_mount($mountpoint, $rootdir, $storage_cfg, undef, $rootuid, $rootgid); |
9622e848 DM |
1292 | }); |
1293 | }; | |
1294 | if (my $err = $@) { | |
e2007ac2 | 1295 | warn "mounting container failed\n"; |
9622e848 | 1296 | umount_all($vmid, $storage_cfg, $conf, 1); |
e2007ac2 | 1297 | die $err; |
9622e848 DM |
1298 | } |
1299 | ||
da629848 | 1300 | return $rootdir; |
9622e848 DM |
1301 | } |
1302 | ||
1303 | ||
b15c75fc | 1304 | sub mountpoint_mount_path { |
da629848 | 1305 | my ($mountpoint, $storage_cfg, $snapname) = @_; |
b15c75fc | 1306 | |
da629848 | 1307 | return mountpoint_mount($mountpoint, undef, $storage_cfg, $snapname); |
b15c75fc | 1308 | } |
cc6b0307 | 1309 | |
21f292ff WB |
1310 | sub query_loopdev { |
1311 | my ($path) = @_; | |
1312 | my $found; | |
1313 | my $parser = sub { | |
1314 | my $line = shift; | |
1315 | if ($line =~ m@^(/dev/loop\d+):@) { | |
1316 | $found = $1; | |
1317 | } | |
1318 | }; | |
1319 | my $cmd = ['losetup', '--associated', $path]; | |
1320 | PVE::Tools::run_command($cmd, outfunc => $parser); | |
1321 | return $found; | |
1322 | } | |
1323 | ||
50df544c WB |
1324 | # Run a function with a file attached to a loop device. |
1325 | # The loop device is always detached afterwards (or set to autoclear). | |
1326 | # Returns the loop device. | |
1327 | sub run_with_loopdev { | |
fd8cab92 | 1328 | my ($func, $file, $readonly) = @_; |
54d11e5c WB |
1329 | my $device = query_loopdev($file); |
1330 | # Try to reuse an existing device | |
1331 | if ($device) { | |
1332 | # We assume that whoever setup the loop device is responsible for | |
1333 | # detaching it. | |
1334 | &$func($device); | |
1335 | return $device; | |
1336 | } | |
1337 | ||
50df544c WB |
1338 | my $parser = sub { |
1339 | my $line = shift; | |
1340 | if ($line =~ m@^(/dev/loop\d+)$@) { | |
1341 | $device = $1; | |
1342 | } | |
1343 | }; | |
fd8cab92 DL |
1344 | my $losetup_cmd = [ |
1345 | 'losetup', | |
1346 | '--show', | |
1347 | '-f', | |
1348 | $file, | |
1349 | ]; | |
1350 | push @$losetup_cmd, '-r' if $readonly; | |
1351 | PVE::Tools::run_command($losetup_cmd, outfunc => $parser); | |
50df544c WB |
1352 | die "failed to setup loop device for $file\n" if !$device; |
1353 | eval { &$func($device); }; | |
1354 | my $err = $@; | |
1355 | PVE::Tools::run_command(['losetup', '-d', $device]); | |
1356 | die $err if $err; | |
1357 | return $device; | |
1358 | } | |
1359 | ||
ab3722b3 WB |
1360 | # In scalar mode: returns a file handle to the deepest directory node. |
1361 | # In list context: returns a list of: | |
1362 | # * the deepest directory node | |
1363 | # * the 2nd deepest directory (parent of the above) | |
1364 | # * directory name of the last directory | |
1365 | # So that the path $2/$3 should lead to $1 afterwards. | |
4c98d66c FG |
1366 | sub walk_tree_nofollow($$$;$$) { |
1367 | my ($start, $subdir, $mkdir, $rootuid, $rootgid) = @_; | |
ab3722b3 | 1368 | |
ab3722b3 WB |
1369 | sysopen(my $fd, $start, O_PATH | O_DIRECTORY) |
1370 | or die "failed to open start directory $start: $!\n"; | |
1371 | ||
2c6830d5 WB |
1372 | return walk_tree_nofollow_fd($start, $fd, $subdir, $mkdir, $rootuid, $rootgid); |
1373 | } | |
1374 | ||
1375 | ||
1376 | sub walk_tree_nofollow_fd($$$$;$$) { | |
1377 | my ($start_dirname, $start_fd, $subdir, $mkdir, $rootuid, $rootgid) = @_; | |
1378 | ||
1379 | # splitdir() returns '' for empty components including the leading / | |
1380 | my @comps = grep { length($_)>0 } File::Spec->splitdir($subdir); | |
1381 | ||
1382 | my $fd = $start_fd; | |
1383 | my $dir = $start_dirname; | |
ab3722b3 WB |
1384 | my $last_component = undef; |
1385 | my $second = $fd; | |
1386 | foreach my $component (@comps) { | |
1387 | $dir .= "/$component"; | |
1388 | my $next = PVE::Tools::openat(fileno($fd), $component, O_NOFOLLOW | O_DIRECTORY); | |
1389 | ||
1390 | if (!$next) { | |
1391 | # failed, check for symlinks and try to create the path | |
3eb5f47b | 1392 | die "symlink encountered at: $dir\n" if $! == ELOOP || $! == ENOTDIR; |
ab3722b3 WB |
1393 | die "cannot open directory $dir: $!\n" if !$mkdir; |
1394 | ||
1395 | # We don't check for errors on mkdirat() here and just try to | |
1396 | # openat() again, since at least one error (EEXIST) is an | |
1397 | # expected possibility if multiple containers start | |
1398 | # simultaneously. If someone else injects a symlink now then | |
1399 | # the subsequent openat() will fail due to O_NOFOLLOW anyway. | |
1400 | PVE::Tools::mkdirat(fileno($fd), $component, 0755); | |
1401 | ||
1402 | $next = PVE::Tools::openat(fileno($fd), $component, O_NOFOLLOW | O_DIRECTORY); | |
1403 | die "failed to create path: $dir: $!\n" if !$next; | |
4c98d66c FG |
1404 | |
1405 | PVE::Tools::fchownat(fileno($next), '', $rootuid, $rootgid, PVE::Tools::AT_EMPTY_PATH) | |
1406 | if defined($rootuid) && defined($rootgid); | |
ab3722b3 WB |
1407 | } |
1408 | ||
2c6830d5 | 1409 | close $second if defined($last_component) && $second != $start_fd; |
ab3722b3 WB |
1410 | $last_component = $component; |
1411 | $second = $fd; | |
1412 | $fd = $next; | |
1413 | } | |
1414 | ||
1415 | return ($fd, defined($last_component) && $second, $last_component) if wantarray; | |
2c6830d5 | 1416 | close $second if defined($last_component) && $second != $start_fd; |
ab3722b3 WB |
1417 | return $fd; |
1418 | } | |
1419 | ||
619f27b4 WB |
1420 | # To guard against symlink attack races against other currently running |
1421 | # containers with shared recursive bind mount hierarchies we prepare a | |
1422 | # directory handle for the directory we're mounting over to verify the | |
1423 | # mountpoint afterwards. | |
1424 | sub __bindmount_prepare { | |
1425 | my ($hostroot, $dir) = @_; | |
1426 | my $srcdh = walk_tree_nofollow($hostroot, $dir, 0); | |
1427 | return $srcdh; | |
1428 | } | |
ab3722b3 | 1429 | |
619f27b4 WB |
1430 | # Assuming we mount to rootfs/a/b/c, verify with the directory handle to 'b' |
1431 | # ($parentfd) that 'b/c' (openat($parentfd, 'c')) really leads to the directory | |
1432 | # we intended to bind mount. | |
1433 | sub __bindmount_verify { | |
1434 | my ($srcdh, $parentfd, $last_dir, $ro) = @_; | |
ab3722b3 WB |
1435 | my $destdh; |
1436 | if ($parentfd) { | |
1437 | # Open the mount point path coming from the parent directory since the | |
1438 | # filehandle we would have gotten as first result of walk_tree_nofollow | |
1439 | # earlier is still a handle to the underlying directory instead of the | |
1440 | # mounted path. | |
619f27b4 WB |
1441 | $destdh = PVE::Tools::openat(fileno($parentfd), $last_dir, PVE::Tools::O_PATH | O_NOFOLLOW | O_DIRECTORY); |
1442 | die "failed to open mount point: $!\n" if !$destdh; | |
1443 | if ($ro) { | |
1444 | my $dot = '.'; | |
619f27b4 | 1445 | # no separate function because 99% of the time it's the wrong thing to use. |
0389da0d | 1446 | if (syscall(PVE::Syscall::faccessat, fileno($destdh), $dot, &POSIX::W_OK, 0) != -1) { |
619f27b4 WB |
1447 | die "failed to mark bind mount read only\n"; |
1448 | } | |
1449 | die "read-only check failed: $!\n" if $! != EROFS; | |
1450 | } | |
ab3722b3 WB |
1451 | } else { |
1452 | # For the rootfs we don't have a parentfd so we open the path directly. | |
1453 | # Note that this means bindmounting any prefix of the host's | |
1454 | # /var/lib/lxc/$vmid path into another container is considered a grave | |
1455 | # security error. | |
1456 | sysopen $destdh, $last_dir, O_PATH | O_DIRECTORY; | |
619f27b4 | 1457 | die "failed to open mount point: $!\n" if !$destdh; |
ab3722b3 | 1458 | } |
ab3722b3 WB |
1459 | |
1460 | my ($srcdev, $srcinode) = stat($srcdh); | |
1461 | my ($dstdev, $dstinode) = stat($destdh); | |
1462 | close $srcdh; | |
1463 | close $destdh; | |
1464 | ||
619f27b4 WB |
1465 | return ($srcdev == $dstdev && $srcinode == $dstinode); |
1466 | } | |
1467 | ||
1468 | # Perform the actual bind mounting: | |
1469 | sub __bindmount_do { | |
1470 | my ($dir, $dest, $ro, @extra_opts) = @_; | |
1471 | PVE::Tools::run_command(['mount', '-o', 'bind', @extra_opts, $dir, $dest]); | |
1472 | if ($ro) { | |
1473 | eval { PVE::Tools::run_command(['mount', '-o', 'bind,remount,ro', $dest]); }; | |
1474 | if (my $err = $@) { | |
1475 | warn "bindmount error\n"; | |
1476 | # don't leave writable bind-mounts behind... | |
1477 | PVE::Tools::run_command(['umount', $dest]); | |
1478 | die $err; | |
1479 | } | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | sub bindmount { | |
1484 | my ($dir, $parentfd, $last_dir, $dest, $ro, @extra_opts) = @_; | |
1485 | ||
1486 | my $srcdh = __bindmount_prepare('/', $dir); | |
1487 | ||
1488 | __bindmount_do($dir, $dest, $ro, @extra_opts); | |
1489 | ||
1490 | if (!__bindmount_verify($srcdh, $parentfd, $last_dir, $ro)) { | |
ab3722b3 WB |
1491 | PVE::Tools::run_command(['umount', $dest]); |
1492 | die "detected mount path change at: $dir\n"; | |
1493 | } | |
c2744c97 WB |
1494 | } |
1495 | ||
619f27b4 WB |
1496 | # Cleanup $rootdir a bit (double and trailing slashes), build the mount path |
1497 | # from $rootdir and $mount and walk the path from $rootdir to the final | |
1498 | # directory to check for symlinks. | |
1499 | sub __mount_prepare_rootdir { | |
4c98d66c | 1500 | my ($rootdir, $mount, $rootuid, $rootgid) = @_; |
619f27b4 WB |
1501 | $rootdir =~ s!/+!/!g; |
1502 | $rootdir =~ s!/+$!!; | |
1503 | my $mount_path = "$rootdir/$mount"; | |
4c98d66c | 1504 | my ($mpfd, $parentfd, $last_dir) = walk_tree_nofollow($rootdir, $mount, 1, $rootuid, $rootgid); |
619f27b4 WB |
1505 | return ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir); |
1506 | } | |
1507 | ||
b15c75fc | 1508 | # use $rootdir = undef to just return the corresponding mount path |
cc6b0307 | 1509 | sub mountpoint_mount { |
4c98d66c | 1510 | my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_; |
ef447944 WB |
1511 | return __mountpoint_mount($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, undef); |
1512 | } | |
1513 | ||
1514 | sub mountpoint_stage { | |
1515 | my ($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_; | |
1516 | my ($path, $loop, $dev) = | |
1517 | __mountpoint_mount($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid, 1); | |
1518 | ||
1519 | if (!defined($path)) { | |
1520 | return undef if $! == ENOSYS; | |
1521 | die "failed to mount subvolume: $!\n"; | |
1522 | } | |
1523 | ||
87962670 WB |
1524 | # We clone the mount point and leave it there in order to keep them connected to eg. loop |
1525 | # devices in case we're hotplugging (which would allow contaienrs to unmount the new mount | |
1526 | # point). | |
ef447944 WB |
1527 | my $err; |
1528 | my $fd = PVE::Tools::open_tree(&AT_FDCWD, $stage_dir, &OPEN_TREE_CLOEXEC | &OPEN_TREE_CLONE) | |
1529 | or die "open_tree() on mount point failed: $!\n"; | |
1530 | ||
1531 | return wantarray ? ($path, $loop, $dev, $fd) : $fd; | |
1532 | } | |
1533 | ||
aee0902b WB |
1534 | sub mountpoint_insert_staged { |
1535 | my ($mount_fd, $rootdir_fd, $mp_dir, $opt, $rootuid, $rootgid) = @_; | |
1536 | ||
1537 | if (!defined($rootdir_fd)) { | |
1538 | sysopen($rootdir_fd, '.', O_PATH | O_DIRECTORY) | |
1539 | or die "failed to open '.': $!\n"; | |
1540 | } | |
1541 | ||
1542 | my $dest_fd = walk_tree_nofollow_fd('/', $rootdir_fd, $mp_dir, 1, $rootuid, $rootgid); | |
1543 | ||
1544 | PVE::Tools::move_mount( | |
1545 | fileno($mount_fd), | |
1546 | '', | |
1547 | fileno($dest_fd), | |
1548 | '', | |
1549 | &MOVE_MOUNT_F_EMPTY_PATH | &MOVE_MOUNT_T_EMPTY_PATH, | |
1550 | ) or die "failed to move '$opt' into container hierarchy: $!\n"; | |
1551 | } | |
1552 | ||
ef447944 WB |
1553 | # Use $stage_mount, $rootdir is treated as a temporary path to "stage" the file system. The user |
1554 | # can then open a file descriptor to it which can be used with the `move_mount` syscall. | |
1555 | # Note that if the kernel does not support the new mount API, this will not perform any action | |
1556 | # and return `undef` with $! = ENOSYS. | |
1557 | sub __mountpoint_mount { | |
1558 | my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, $stage_mount) = @_; | |
1559 | ||
1560 | if (defined($stage_mount) && !PVE::LXC::Tools::can_use_new_mount_api()) { | |
1561 | $! = ENOSYS; | |
1562 | return undef; | |
1563 | } | |
cc6b0307 | 1564 | |
48e36ac2 WB |
1565 | # When staging mount points we always mount to $rootdir directly (iow. as if `mp=/`). |
1566 | # This is required since __mount_prepare_rootdir() will return handles to the parent directory | |
1567 | # which we use in __bindmount_verify()! | |
1568 | my $mount = $stage_mount ? '/': $mountpoint->{mp}; | |
1569 | ||
cc6b0307 | 1570 | my $volid = $mountpoint->{volume}; |
7c921c80 | 1571 | my $type = $mountpoint->{type}; |
50df544c WB |
1572 | my $quota = !$snapname && !$mountpoint->{ro} && $mountpoint->{quota}; |
1573 | my $mounted_dev; | |
b15c75fc | 1574 | |
cc6b0307 AD |
1575 | return if !$volid || !$mount; |
1576 | ||
ab3722b3 WB |
1577 | $mount =~ s!/+!/!g; |
1578 | ||
b15c75fc | 1579 | my $mount_path; |
ab3722b3 | 1580 | my ($mpfd, $parentfd, $last_dir); |
b15c75fc DM |
1581 | |
1582 | if (defined($rootdir)) { | |
619f27b4 | 1583 | ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir) = |
4c98d66c | 1584 | __mount_prepare_rootdir($rootdir, $mount, $rootuid, $rootgid); |
116ce06f | 1585 | } |
ef447944 WB |
1586 | |
1587 | if (defined($stage_mount)) { | |
1588 | $mount_path = $rootdir; | |
1589 | } | |
b15c75fc DM |
1590 | |
1591 | my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1); | |
cc6b0307 | 1592 | |
b15c75fc | 1593 | die "unknown snapshot path for '$volid'" if !$storage && defined($snapname); |
cc6b0307 | 1594 | |
2bf24eb3 | 1595 | my $optlist = []; |
e80cb0cd TL |
1596 | |
1597 | if (my $mountopts = $mountpoint->{mountoptions}) { | |
1598 | my @opts = split(/;/, $mountpoint->{mountoptions}); | |
1599 | push @$optlist, grep { PVE::LXC::Config::is_valid_mount_option($_) } @opts; | |
2bf24eb3 OB |
1600 | } |
1601 | ||
719129ea WB |
1602 | my $acl = $mountpoint->{acl}; |
1603 | if (defined($acl)) { | |
2bf24eb3 | 1604 | push @$optlist, ($acl ? 'acl' : 'noacl'); |
471dd315 | 1605 | } |
2bf24eb3 OB |
1606 | |
1607 | my $optstring = join(',', @$optlist); | |
c2744c97 | 1608 | my $readonly = $mountpoint->{ro}; |
471dd315 | 1609 | |
9de0505c WL |
1610 | my @extra_opts; |
1611 | @extra_opts = ('-o', $optstring) if $optstring; | |
471dd315 | 1612 | |
b15c75fc DM |
1613 | if ($storage) { |
1614 | ||
1615 | my $scfg = PVE::Storage::storage_config($storage_cfg, $storage); | |
7c138f58 | 1616 | |
841fba68 | 1617 | my $path = PVE::Storage::map_volume($storage_cfg, $volid, $snapname); |
7c138f58 | 1618 | |
841fba68 | 1619 | $path = PVE::Storage::path($storage_cfg, $volid, $snapname) if !defined($path); |
b15c75fc DM |
1620 | |
1621 | my ($vtype, undef, undef, undef, undef, $isBase, $format) = | |
1622 | PVE::Storage::parse_volname($storage_cfg, $volid); | |
1623 | ||
c87b9dd8 DM |
1624 | $format = 'iso' if $vtype eq 'iso'; # allow to handle iso files |
1625 | ||
b15c75fc | 1626 | if ($format eq 'subvol') { |
30de33be | 1627 | if ($mount_path) { |
3ceee38d FE |
1628 | my (undef, $name) = PVE::Storage::parse_volname($storage_cfg, $volid); |
1629 | if (defined($snapname)) { | |
1630 | $name .= "\@$snapname"; | |
e84f7f5d | 1631 | if ($scfg->{type} eq 'zfspool') { |
3ceee38d | 1632 | PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', "$scfg->{pool}/$name", $mount_path]); |
e84f7f5d | 1633 | } else { |
30de33be DM |
1634 | die "cannot mount subvol snapshots for storage type '$scfg->{type}'\n"; |
1635 | } | |
e84f7f5d | 1636 | } else { |
719129ea WB |
1637 | if (defined($acl) && $scfg->{type} eq 'zfspool') { |
1638 | my $acltype = ($acl ? 'acltype=posixacl' : 'acltype=noacl'); | |
719129ea WB |
1639 | PVE::Tools::run_command(['zfs', 'set', $acltype, "$scfg->{pool}/$name"]); |
1640 | } | |
ab3722b3 | 1641 | bindmount($path, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts); |
50df544c | 1642 | warn "cannot enable quota control for bind mounted subvolumes\n" if $quota; |
30de33be | 1643 | } |
b15c75fc | 1644 | } |
5f6280cf | 1645 | return wantarray ? ($path, 0, undef) : $path; |
c87b9dd8 | 1646 | } elsif ($format eq 'raw' || $format eq 'iso') { |
ada088e6 WB |
1647 | # NOTE: 'mount' performs canonicalization without the '-c' switch, which for |
1648 | # device-mapper devices is special-cased to use the /dev/mapper symlinks. | |
1649 | # Our autodev hook expects the /dev/dm-* device currently | |
1650 | # and will create the /dev/mapper symlink accordingly | |
e439a713 WB |
1651 | $path = Cwd::realpath($path); |
1652 | die "failed to get device path\n" if !$path; | |
1653 | ($path) = ($path =~ /^(.*)$/s); #untaint | |
50df544c WB |
1654 | my $domount = sub { |
1655 | my ($path) = @_; | |
1656 | if ($mount_path) { | |
1657 | if ($format eq 'iso') { | |
1658 | PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, $path, $mount_path]); | |
1659 | } elsif ($isBase || defined($snapname)) { | |
1660 | PVE::Tools::run_command(['mount', '-o', 'ro,noload', @extra_opts, $path, $mount_path]); | |
1661 | } else { | |
1662 | if ($quota) { | |
1663 | push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0'; | |
1664 | } | |
c2744c97 | 1665 | push @extra_opts, '-o', 'ro' if $readonly; |
50df544c WB |
1666 | PVE::Tools::run_command(['mount', @extra_opts, $path, $mount_path]); |
1667 | } | |
1668 | } | |
1669 | }; | |
30de33be | 1670 | my $use_loopdev = 0; |
b15c75fc | 1671 | if ($scfg->{path}) { |
fd8cab92 | 1672 | $mounted_dev = run_with_loopdev($domount, $path, $readonly); |
30de33be | 1673 | $use_loopdev = 1; |
2e879877 DM |
1674 | } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' || |
1675 | $scfg->{type} eq 'rbd' || $scfg->{type} eq 'lvmthin') { | |
50df544c WB |
1676 | $mounted_dev = $path; |
1677 | &$domount($path); | |
b15c75fc DM |
1678 | } else { |
1679 | die "unsupported storage type '$scfg->{type}'\n"; | |
1680 | } | |
50df544c | 1681 | return wantarray ? ($path, $use_loopdev, $mounted_dev) : $path; |
b15c75fc DM |
1682 | } else { |
1683 | die "unsupported image format '$format'\n"; | |
1684 | } | |
7c921c80 | 1685 | } elsif ($type eq 'device') { |
c9bc95a1 | 1686 | push @extra_opts, '-o', 'ro' if $readonly; |
0d449e38 WB |
1687 | push @extra_opts, '-o', 'usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0' if $quota; |
1688 | # See the NOTE above about devicemapper canonicalization | |
1689 | my ($devpath) = (Cwd::realpath($volid) =~ /^(.*)$/s); # realpath() taints | |
471dd315 | 1690 | PVE::Tools::run_command(['mount', @extra_opts, $volid, $mount_path]) if $mount_path; |
0d449e38 | 1691 | return wantarray ? ($volid, 0, $devpath) : $volid; |
e2007ac2 DM |
1692 | } elsif ($type eq 'bind') { |
1693 | die "directory '$volid' does not exist\n" if ! -d $volid; | |
ab3722b3 | 1694 | bindmount($volid, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts) if $mount_path; |
50df544c WB |
1695 | warn "cannot enable quota control for bind mounts\n" if $quota; |
1696 | return wantarray ? ($volid, 0, undef) : $volid; | |
b15c75fc DM |
1697 | } |
1698 | ||
1699 | die "unsupported storage"; | |
cc6b0307 AD |
1700 | } |
1701 | ||
b2de4c04 WB |
1702 | sub mountpoint_hotplug($$$) { |
1703 | my ($vmid, $conf, $opt, $mp, $storage_cfg) = @_; | |
1704 | ||
1705 | my (undef, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf); | |
1706 | ||
172ea186 WB |
1707 | # We do the rest in a fork with an unshared mount namespace, because: |
1708 | # -) change our papparmor profile to that of /usr/bin/lxc-start | |
1709 | # -) we're now going to 'stage' # the mountpoint, then grab it, then move into the | |
1710 | # container's namespace, then mount it. | |
b2de4c04 WB |
1711 | |
1712 | PVE::Tools::run_fork(sub { | |
1713 | # Pin the container pid longer, we also need to get its monitor/parent: | |
1714 | my ($ct_pid, $ct_pidfd) = open_lxc_pid($vmid) | |
1715 | or die "failed to open pidfd of container $vmid\'s init process\n"; | |
1716 | ||
1717 | my ($monitor_pid, $monitor_pidfd) = open_ppid($ct_pid) | |
1718 | or die "failed to open pidfd of container $vmid\'s monitor process\n"; | |
1719 | ||
1720 | my $ct_mnt_ns = $get_container_namespace->($vmid, $ct_pid, 'mnt'); | |
1721 | my $monitor_mnt_ns = $get_container_namespace->($vmid, $monitor_pid, 'mnt'); | |
1722 | ||
172ea186 WB |
1723 | # Grab a file descriptor to our apparmor label file so we can change into the 'lxc-start' |
1724 | # profile to lower our privileges to the same level we have in the start hook: | |
1725 | sysopen(my $aa_fd, "/proc/self/attr/current", O_WRONLY) | |
1726 | or die "failed to open '/proc/self/attr/current' for writing: $!\n"; | |
1727 | # But switch namespaces first, to make sure the namespace switches aren't blocked by | |
1728 | # apparmor. | |
1729 | ||
b2de4c04 WB |
1730 | # Change into the monitor's mount namespace. We "pin" the mount into the monitor's |
1731 | # namespace for it to remain active there since the container will be able to unmount | |
1732 | # hotplugged mount points and thereby potentially free up loop devices, which is a security | |
1733 | # concern. | |
1734 | PVE::Tools::setns(fileno($monitor_mnt_ns), PVE::Tools::CLONE_NEWNS); | |
1735 | chdir('/') | |
1736 | or die "failed to change root directory within the monitor's mount namespace: $!\n"; | |
1737 | ||
1738 | my $dir = get_staging_mount_path($opt); | |
172ea186 WB |
1739 | |
1740 | # Now switch our apparmor profile before mounting: | |
1741 | my $data = 'changeprofile /usr/bin/lxc-start'; | |
1742 | if (syswrite($aa_fd, $data, length($data)) != length($data)) { | |
1743 | die "failed to change apparmor profile: $!\n"; | |
1744 | } | |
1745 | # Check errors on close as well: | |
1746 | close($aa_fd) | |
1747 | or die "failed to change apparmor profile (close() failed): $!\n"; | |
1748 | ||
b2de4c04 WB |
1749 | my $mount_fd = mountpoint_stage($mp, $dir, $storage_cfg, undef, $rootuid, $rootgid); |
1750 | ||
1751 | PVE::Tools::setns(fileno($ct_mnt_ns), PVE::Tools::CLONE_NEWNS); | |
1752 | chdir('/') | |
1753 | or die "failed to change root directory within the container's mount namespace: $!\n"; | |
1754 | ||
1755 | mountpoint_insert_staged($mount_fd, undef, $mp->{mp}, $opt, $rootuid, $rootgid); | |
1756 | }); | |
1757 | } | |
1758 | ||
180c05c5 WB |
1759 | # Create a directory in the mountpoint staging tempfs. |
1760 | sub get_staging_mount_path($) { | |
1761 | my ($opt) = @_; | |
1762 | ||
1763 | my $target = get_staging_tempfs() . "/$opt"; | |
1764 | if (!mkdir($target) && $! != EEXIST) { | |
1765 | die "failed to create directory $target: $!\n"; | |
1766 | } | |
1767 | ||
1768 | return $target; | |
1769 | } | |
1770 | ||
1771 | # Mount /run/pve/mountpoints as tmpfs | |
1772 | sub get_staging_tempfs() { | |
1773 | # We choose a path in /var/lib/lxc/ here because the lxc-start apparmor profile restricts most | |
1774 | # mounts to that. | |
1775 | my $target = '/var/lib/lxc/.pve-staged-mounts'; | |
1776 | if (!mkdir($target)) { | |
1777 | return $target if $! == EEXIST; | |
1778 | die "failed to create directory $target: $!\n"; | |
1779 | } | |
1780 | ||
1781 | PVE::Tools::mount("none", $target, 'tmpfs', 0, "size=8k,mode=755") | |
1782 | or die "failed to mount $target as tmpfs: $!\n"; | |
1783 | ||
1784 | return $target; | |
1785 | } | |
1786 | ||
6c871c36 | 1787 | sub mkfs { |
d216e891 | 1788 | my ($dev, $rootuid, $rootgid) = @_; |
6c871c36 | 1789 | |
d216e891 WB |
1790 | PVE::Tools::run_command(['mkfs.ext4', '-O', 'mmp', |
1791 | '-E', "root_owner=$rootuid:$rootgid", | |
1792 | $dev]); | |
6c871c36 DM |
1793 | } |
1794 | ||
1795 | sub format_disk { | |
d216e891 | 1796 | my ($storage_cfg, $volid, $rootuid, $rootgid) = @_; |
6c871c36 DM |
1797 | |
1798 | if ($volid =~ m!^/dev/.+!) { | |
1799 | mkfs($volid); | |
1800 | return; | |
1801 | } | |
1802 | ||
1803 | my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1); | |
1804 | ||
1805 | die "cannot format volume '$volid' with no storage\n" if !$storage; | |
1806 | ||
08ca136d DM |
1807 | PVE::Storage::activate_volumes($storage_cfg, [$volid]); |
1808 | ||
841fba68 DM |
1809 | my $path = PVE::Storage::map_volume($storage_cfg, $volid); |
1810 | ||
1811 | $path = PVE::Storage::path($storage_cfg, $volid) if !defined($path); | |
6c871c36 DM |
1812 | |
1813 | my ($vtype, undef, undef, undef, undef, $isBase, $format) = | |
1814 | PVE::Storage::parse_volname($storage_cfg, $volid); | |
1815 | ||
1816 | die "cannot format volume '$volid' (format == $format)\n" | |
1817 | if $format ne 'raw'; | |
1818 | ||
d216e891 | 1819 | mkfs($path, $rootuid, $rootgid); |
6c871c36 DM |
1820 | } |
1821 | ||
1822 | sub destroy_disks { | |
1823 | my ($storecfg, $vollist) = @_; | |
1824 | ||
1825 | foreach my $volid (@$vollist) { | |
1826 | eval { PVE::Storage::vdisk_free($storecfg, $volid); }; | |
1827 | warn $@ if $@; | |
1828 | } | |
1829 | } | |
1830 | ||
c9cf8008 WB |
1831 | sub alloc_disk { |
1832 | my ($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid) = @_; | |
1833 | ||
1834 | my $needs_chown = 0; | |
1835 | my $volid; | |
1836 | ||
1837 | my $scfg = PVE::Storage::storage_config($storecfg, $storage); | |
1838 | # fixme: use better naming ct-$vmid-disk-X.raw? | |
1839 | ||
1840 | eval { | |
1841 | my $do_format = 0; | |
be6c3dfa | 1842 | if ($scfg->{type} eq 'dir' || $scfg->{type} eq 'nfs' || $scfg->{type} eq 'cifs' ) { |
c9cf8008 WB |
1843 | if ($size_kb > 0) { |
1844 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', | |
1845 | undef, $size_kb); | |
1846 | $do_format = 1; | |
1847 | } else { | |
1848 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol', | |
1849 | undef, 0); | |
1850 | $needs_chown = 1; | |
1851 | } | |
1852 | } elsif ($scfg->{type} eq 'zfspool') { | |
1853 | ||
1854 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol', | |
1855 | undef, $size_kb); | |
1856 | $needs_chown = 1; | |
1857 | } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' || $scfg->{type} eq 'lvmthin') { | |
1858 | ||
1859 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb); | |
1860 | $do_format = 1; | |
1861 | ||
1862 | } elsif ($scfg->{type} eq 'rbd') { | |
1863 | ||
c9cf8008 WB |
1864 | $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb); |
1865 | $do_format = 1; | |
1866 | } else { | |
1867 | die "unable to create containers on storage type '$scfg->{type}'\n"; | |
1868 | } | |
1869 | format_disk($storecfg, $volid, $rootuid, $rootgid) if $do_format; | |
1870 | }; | |
1871 | if (my $err = $@) { | |
1872 | # in case formatting got interrupted: | |
1873 | if (defined($volid)) { | |
1874 | eval { PVE::Storage::vdisk_free($storecfg, $volid); }; | |
1875 | warn $@ if $@; | |
1876 | } | |
1877 | die $err; | |
1878 | } | |
1879 | ||
1880 | return ($volid, $needs_chown); | |
1881 | } | |
1882 | ||
2aee38e5 | 1883 | our $NEW_DISK_RE = qr/^([^:\s]+):(\d+(\.\d+)?)$/; |
6c871c36 | 1884 | sub create_disks { |
32e15a2b | 1885 | my ($storecfg, $vmid, $settings, $conf, $pending) = @_; |
6c871c36 DM |
1886 | |
1887 | my $vollist = []; | |
1888 | ||
1889 | eval { | |
d216e891 WB |
1890 | my (undef, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf); |
1891 | my $chown_vollist = []; | |
1892 | ||
015740e6 | 1893 | PVE::LXC::Config->foreach_volume($settings, sub { |
6c871c36 DM |
1894 | my ($ms, $mountpoint) = @_; |
1895 | ||
1896 | my $volid = $mountpoint->{volume}; | |
1897 | my $mp = $mountpoint->{mp}; | |
1898 | ||
1899 | my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1); | |
1900 | ||
2aee38e5 | 1901 | if ($storage && ($volid =~ $NEW_DISK_RE)) { |
8ed5ff9d | 1902 | my ($storeid, $size_gb) = ($1, $2); |
6c871c36 | 1903 | |
8ed5ff9d | 1904 | my $size_kb = int(${size_gb}*1024) * 1024; |
6c871c36 | 1905 | |
c9cf8008 WB |
1906 | my $needs_chown = 0; |
1907 | ($volid, $needs_chown) = alloc_disk($storecfg, $vmid, $storage, $size_kb, $rootuid, $rootgid); | |
1908 | push @$chown_vollist, $volid if $needs_chown; | |
6c871c36 | 1909 | push @$vollist, $volid; |
71c780b9 WB |
1910 | $mountpoint->{volume} = $volid; |
1911 | $mountpoint->{size} = $size_kb * 1024; | |
32e15a2b OB |
1912 | if ($pending) { |
1913 | $conf->{pending}->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs'); | |
1914 | } else { | |
1915 | $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs'); | |
1916 | } | |
6c871c36 | 1917 | } else { |
32e15a2b OB |
1918 | # use specified/existing volid/dir/device |
1919 | $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs'); | |
6c871c36 DM |
1920 | } |
1921 | }); | |
d216e891 WB |
1922 | |
1923 | PVE::Storage::activate_volumes($storecfg, $chown_vollist, undef); | |
1924 | foreach my $volid (@$chown_vollist) { | |
1925 | my $path = PVE::Storage::path($storecfg, $volid, undef); | |
1926 | chown($rootuid, $rootgid, $path); | |
1927 | } | |
1928 | PVE::Storage::deactivate_volumes($storecfg, $chown_vollist, undef); | |
6c871c36 DM |
1929 | }; |
1930 | # free allocated images on error | |
1931 | if (my $err = $@) { | |
1932 | destroy_disks($storecfg, $vollist); | |
32e15a2b | 1933 | die $err; |
6c871c36 DM |
1934 | } |
1935 | return $vollist; | |
1936 | } | |
1937 | ||
6827e44d AA |
1938 | sub update_disksize { |
1939 | my ($vmid, $conf, $all_volumes) = @_; | |
1940 | ||
1941 | my $changes; | |
1942 | my $prefix = "CT $vmid:"; | |
1943 | ||
1944 | my $update_mp = sub { | |
1945 | my ($key, $mp, @param) = @_; | |
1946 | my $size = $all_volumes->{$mp->{volume}}->{size} // 0; | |
1947 | ||
1948 | if (!defined($mp->{size}) || $size != $mp->{size}) { | |
1949 | $changes = 1; | |
1950 | print "$prefix updated volume size of '$mp->{volume}' in config.\n"; | |
1951 | $mp->{size} = $size; | |
1952 | my $nomp = 1 if ($key eq 'rootfs'); | |
1953 | $conf->{$key} = PVE::LXC::Config->print_ct_mountpoint($mp, $nomp); | |
1954 | } | |
1955 | }; | |
1956 | ||
015740e6 | 1957 | PVE::LXC::Config->foreach_volume($conf, $update_mp); |
6827e44d AA |
1958 | |
1959 | return $changes; | |
1960 | } | |
1961 | ||
1962 | sub update_unused { | |
1963 | my ($vmid, $conf, $all_volumes) = @_; | |
1964 | ||
1965 | my $changes; | |
1966 | my $prefix = "CT $vmid:"; | |
1967 | ||
1968 | # Note: it is allowed to define multiple storage entries with the same path | |
1969 | # (alias), so we need to check both 'volid' and real 'path' (two different | |
1970 | # volid can point to the same path). | |
1971 | ||
1972 | # used and unused disks | |
1973 | my $refpath = {}; | |
1974 | my $orphans = {}; | |
1975 | ||
1976 | foreach my $opt (keys %$conf) { | |
1977 | next if ($opt !~ m/^unused\d+$/); | |
1978 | my $vol = $all_volumes->{$conf->{$opt}}; | |
1979 | $refpath->{$vol->{path}} = $vol->{volid}; | |
1980 | } | |
1981 | ||
1982 | foreach my $key (keys %$all_volumes) { | |
1983 | my $vol = $all_volumes->{$key}; | |
1984 | my $in_use = PVE::LXC::Config->is_volume_in_use($conf, $vol->{volid}); | |
1985 | my $path = $vol->{path}; | |
1986 | ||
1987 | if ($in_use) { | |
1988 | $refpath->{$path} = $key; | |
1989 | delete $orphans->{$path}; | |
1990 | } else { | |
1991 | if ((!$orphans->{$path}) && (!$refpath->{$path})) { | |
1992 | $orphans->{$path} = $key; | |
1993 | } | |
1994 | } | |
1995 | } | |
1996 | ||
1997 | for my $key (keys %$orphans) { | |
1998 | my $disk = $orphans->{$key}; | |
1999 | my $unused = PVE::LXC::Config->add_unused_volume($conf, $disk); | |
2000 | ||
2001 | if ($unused) { | |
2002 | $changes = 1; | |
2003 | print "$prefix add unreferenced volume '$disk' as '$unused' to config.\n"; | |
2004 | } | |
2005 | } | |
2006 | ||
2007 | return $changes; | |
2008 | } | |
2009 | ||
2010 | sub scan_volids { | |
2011 | my ($cfg, $vmid) = @_; | |
2012 | ||
2013 | my $info = PVE::Storage::vdisk_list($cfg, undef, $vmid); | |
2014 | ||
2015 | my $all_volumes = {}; | |
2016 | foreach my $storeid (keys %$info) { | |
2017 | foreach my $item (@{$info->{$storeid}}) { | |
2018 | my $volid = $item->{volid}; | |
2019 | next if !($volid && $item->{size}); | |
2020 | $item->{path} = PVE::Storage::path($cfg, $volid); | |
2021 | $all_volumes->{$volid} = $item; | |
2022 | } | |
2023 | } | |
2024 | ||
2025 | return $all_volumes; | |
2026 | } | |
2027 | ||
2028 | sub rescan { | |
2029 | my ($vmid, $nolock, $dryrun) = @_; | |
2030 | ||
2031 | my $cfg = PVE::Storage::config(); | |
2032 | ||
2033 | # FIXME: Remove once our RBD plugin can handle CT and VM on a single storage | |
2034 | # see: https://pve.proxmox.com/pipermail/pve-devel/2018-July/032900.html | |
2035 | foreach my $stor (keys %{$cfg->{ids}}) { | |
2036 | delete($cfg->{ids}->{$stor}) if !$cfg->{ids}->{$stor}->{content}->{rootdir}; | |
2037 | } | |
2038 | ||
2039 | print "rescan volumes...\n"; | |
2040 | my $all_volumes = scan_volids($cfg, $vmid); | |
2041 | ||
2042 | my $updatefn = sub { | |
2043 | my ($vmid) = @_; | |
2044 | ||
2045 | my $changes; | |
2046 | my $conf = PVE::LXC::Config->load_config($vmid); | |
2047 | ||
2048 | PVE::LXC::Config->check_lock($conf); | |
2049 | ||
2050 | my $vm_volids = {}; | |
2051 | foreach my $volid (keys %$all_volumes) { | |
2052 | my $info = $all_volumes->{$volid}; | |
2053 | $vm_volids->{$volid} = $info if $info->{vmid} == $vmid; | |
2054 | } | |
2055 | ||
2056 | my $upu = update_unused($vmid, $conf, $vm_volids); | |
2057 | my $upd = update_disksize($vmid, $conf, $vm_volids); | |
2058 | $changes = $upu || $upd; | |
2059 | ||
2060 | PVE::LXC::Config->write_config($vmid, $conf) if $changes && !$dryrun; | |
2061 | }; | |
2062 | ||
2063 | if (defined($vmid)) { | |
2064 | if ($nolock) { | |
2065 | &$updatefn($vmid); | |
2066 | } else { | |
2067 | PVE::LXC::Config->lock_config($vmid, $updatefn, $vmid); | |
2068 | } | |
2069 | } else { | |
2070 | my $vmlist = config_list(); | |
2071 | foreach my $vmid (keys %$vmlist) { | |
2072 | if ($nolock) { | |
2073 | &$updatefn($vmid); | |
2074 | } else { | |
2075 | PVE::LXC::Config->lock_config($vmid, $updatefn, $vmid); | |
2076 | } | |
2077 | } | |
2078 | } | |
2079 | } | |
2080 | ||
2081 | ||
68e8f3c5 DM |
2082 | # bash completion helper |
2083 | ||
2084 | sub complete_os_templates { | |
2085 | my ($cmdname, $pname, $cvalue) = @_; | |
2086 | ||
2087 | my $cfg = PVE::Storage::config(); | |
2088 | ||
9e9bc3a6 | 2089 | my $storeid; |
68e8f3c5 DM |
2090 | |
2091 | if ($cvalue =~ m/^([^:]+):/) { | |
2092 | $storeid = $1; | |
2093 | } | |
2094 | ||
2095 | my $vtype = $cmdname eq 'restore' ? 'backup' : 'vztmpl'; | |
2096 | my $data = PVE::Storage::template_list($cfg, $storeid, $vtype); | |
2097 | ||
2098 | my $res = []; | |
2099 | foreach my $id (keys %$data) { | |
2100 | foreach my $item (@{$data->{$id}}) { | |
2101 | push @$res, $item->{volid} if defined($item->{volid}); | |
2102 | } | |
2103 | } | |
2104 | ||
2105 | return $res; | |
2106 | } | |
2107 | ||
68e8f3c5 DM |
2108 | my $complete_ctid_full = sub { |
2109 | my ($running) = @_; | |
2110 | ||
2111 | my $idlist = vmstatus(); | |
2112 | ||
2113 | my $active_hash = list_active_containers(); | |
2114 | ||
2115 | my $res = []; | |
2116 | ||
2117 | foreach my $id (keys %$idlist) { | |
2118 | my $d = $idlist->{$id}; | |
2119 | if (defined($running)) { | |
2120 | next if $d->{template}; | |
2121 | next if $running && !$active_hash->{$id}; | |
2122 | next if !$running && $active_hash->{$id}; | |
2123 | } | |
2124 | push @$res, $id; | |
2125 | ||
2126 | } | |
2127 | return $res; | |
2128 | }; | |
2129 | ||
2130 | sub complete_ctid { | |
2131 | return &$complete_ctid_full(); | |
2132 | } | |
2133 | ||
2134 | sub complete_ctid_stopped { | |
2135 | return &$complete_ctid_full(0); | |
2136 | } | |
2137 | ||
2138 | sub complete_ctid_running { | |
2139 | return &$complete_ctid_full(1); | |
2140 | } | |
2141 | ||
c6a605f9 WB |
2142 | sub parse_id_maps { |
2143 | my ($conf) = @_; | |
2144 | ||
2145 | my $id_map = []; | |
2146 | my $rootuid = 0; | |
2147 | my $rootgid = 0; | |
2148 | ||
2149 | my $lxc = $conf->{lxc}; | |
2150 | foreach my $entry (@$lxc) { | |
2151 | my ($key, $value) = @$entry; | |
108c6cab WB |
2152 | # FIXME: remove the 'id_map' variant when lxc-3.0 arrives |
2153 | next if $key ne 'lxc.idmap' && $key ne 'lxc.id_map'; | |
c6a605f9 WB |
2154 | if ($value =~ /^([ug])\s+(\d+)\s+(\d+)\s+(\d+)\s*$/) { |
2155 | my ($type, $ct, $host, $length) = ($1, $2, $3, $4); | |
2156 | push @$id_map, [$type, $ct, $host, $length]; | |
2157 | if ($ct == 0) { | |
2158 | $rootuid = $host if $type eq 'u'; | |
2159 | $rootgid = $host if $type eq 'g'; | |
2160 | } | |
2161 | } else { | |
108c6cab | 2162 | die "failed to parse idmap: $value\n"; |
c6a605f9 WB |
2163 | } |
2164 | } | |
2165 | ||
2166 | if (!@$id_map && $conf->{unprivileged}) { | |
2167 | # Should we read them from /etc/subuid? | |
2168 | $id_map = [ ['u', '0', '100000', '65536'], | |
2169 | ['g', '0', '100000', '65536'] ]; | |
2170 | $rootuid = $rootgid = 100000; | |
2171 | } | |
2172 | ||
2173 | return ($id_map, $rootuid, $rootgid); | |
2174 | } | |
2175 | ||
01dce99b WB |
2176 | sub userns_command { |
2177 | my ($id_map) = @_; | |
2178 | if (@$id_map) { | |
2179 | return ['lxc-usernsexec', (map { ('-m', join(':', @$_)) } @$id_map), '--']; | |
2180 | } | |
2181 | return []; | |
2182 | } | |
2183 | ||
572efee1 TL |
2184 | my sub print_ct_stderr_log { |
2185 | my ($vmid) = @_; | |
2186 | my $log = eval { file_get_contents("/run/pve/ct-$vmid.stderr") }; | |
2187 | return if !$log; | |
2188 | ||
2189 | while ($log =~ /^\h*(lxc-start:?\s+$vmid:?\s*\S+\s*)?(.*?)\h*$/gm) { | |
2190 | my $line = $2; | |
2191 | print STDERR "$line\n"; | |
2192 | } | |
2193 | } | |
2194 | ||
6e42d509 TL |
2195 | my sub monitor_state_change($$) { |
2196 | my ($monitor_socket, $vmid) = @_; | |
2197 | die "no monitor socket\n" if !defined($monitor_socket); | |
2198 | ||
2199 | while (1) { | |
2200 | my ($type, $name, $value) = PVE::LXC::Monitor::read_lxc_message($monitor_socket); | |
2201 | ||
2202 | die "monitor socket: got EOF\n" if !defined($type); | |
2203 | ||
2204 | next if $name ne "$vmid" || $type ne 'STATE'; | |
2205 | ||
2206 | if ($value eq PVE::LXC::Monitor::STATE_STARTING) { | |
2207 | alarm(0); # don't timeout after seeing the starting state | |
2208 | } elsif ($value eq PVE::LXC::Monitor::STATE_ABORTING || | |
2209 | $value eq PVE::LXC::Monitor::STATE_STOPPING || | |
2210 | $value eq PVE::LXC::Monitor::STATE_STOPPED) { | |
2211 | return 0; | |
2212 | } elsif ($value eq PVE::LXC::Monitor::STATE_RUNNING) { | |
2213 | return 1; | |
2214 | } else { | |
2215 | warn "unexpected message from monitor socket - " . | |
2216 | "type: '$type' - value: '$value'\n"; | |
2217 | } | |
2218 | } | |
2219 | } | |
2220 | my sub monitor_start($$) { | |
2221 | my ($monitor_socket, $vmid) = @_; | |
2222 | ||
2223 | my $success = eval { | |
2224 | PVE::Tools::run_with_timeout(10, \&monitor_state_change, $monitor_socket, $vmid) | |
2225 | }; | |
2226 | if (my $err = $@) { | |
2227 | warn "problem with monitor socket, but continuing anyway: $err\n"; | |
2228 | } elsif (!$success) { | |
572efee1 | 2229 | print_ct_stderr_log($vmid); |
6e42d509 TL |
2230 | die "startup for container '$vmid' failed\n"; |
2231 | } | |
2232 | } | |
2233 | ||
6725e93c | 2234 | sub vm_start { |
cc9967d2 | 2235 | my ($vmid, $conf, $skiplock, $debug) = @_; |
6725e93c | 2236 | |
60b3c5e4 OB |
2237 | # apply pending changes while starting |
2238 | if (scalar(keys %{$conf->{pending}})) { | |
2239 | my $storecfg = PVE::Storage::config(); | |
2240 | PVE::LXC::Config->vmconfig_apply_pending($vmid, $conf, $storecfg); | |
87c36547 | 2241 | PVE::LXC::Config->write_config($vmid, $conf); |
60b3c5e4 OB |
2242 | $conf = PVE::LXC::Config->load_config($vmid); # update/reload |
2243 | } | |
2244 | ||
6725e93c AA |
2245 | update_lxc_config($vmid, $conf); |
2246 | ||
2e64f057 AA |
2247 | my $skiplock_flag_fn = "/run/lxc/skiplock-$vmid"; |
2248 | ||
2249 | if ($skiplock) { | |
2250 | open(my $fh, '>', $skiplock_flag_fn) || die "failed to open $skiplock_flag_fn for writing: $!\n"; | |
2251 | close($fh); | |
2252 | } | |
6725e93c | 2253 | |
e8bb92bd SI |
2254 | my $storage_cfg = PVE::Storage::config(); |
2255 | my $vollist = PVE::LXC::Config->get_vm_volumes($conf); | |
2256 | ||
2257 | PVE::Storage::activate_volumes($storage_cfg, $vollist); | |
2258 | ||
6e42d509 | 2259 | my $monitor_socket = eval { PVE::LXC::Monitor::get_monitor_socket() }; |
abaa24bd FE |
2260 | warn $@ if $@; |
2261 | ||
572efee1 TL |
2262 | unlink "/run/pve/ct-$vmid.stderr"; # systemd does not truncate log files |
2263 | ||
cc9967d2 TL |
2264 | my $is_debug = $debug || (!defined($debug) && $conf->{debug}); |
2265 | my $base_unit = $is_debug ? 'pve-container-debug' : 'pve-container'; | |
abaa24bd | 2266 | |
cc9967d2 | 2267 | my $cmd = ['systemctl', 'start', "$base_unit\@$vmid"]; |
6725e93c | 2268 | |
1a416433 | 2269 | PVE::GuestHelpers::exec_hookscript($conf, $vmid, 'pre-start', 1); |
abaa24bd FE |
2270 | eval { |
2271 | PVE::Tools::run_command($cmd); | |
2272 | ||
6e42d509 | 2273 | monitor_start($monitor_socket, $vmid) if defined($monitor_socket); |
cc9967d2 TL |
2274 | |
2275 | # if debug is requested, print the log it also when the start succeeded | |
2276 | print_ct_stderr_log($vmid) if $is_debug; | |
abaa24bd | 2277 | }; |
2e64f057 AA |
2278 | if (my $err = $@) { |
2279 | unlink $skiplock_flag_fn; | |
1322f50d | 2280 | die $err; |
2e64f057 | 2281 | } |
1a416433 | 2282 | PVE::GuestHelpers::exec_hookscript($conf, $vmid, 'post-start'); |
6725e93c AA |
2283 | |
2284 | return; | |
2285 | } | |
2286 | ||
b1bad293 WB |
2287 | # Helper to stop a container completely and make sure it has stopped completely. |
2288 | # This is necessary because we want the post-stop hook to have completed its | |
2289 | # unmount-all step, but post-stop happens after lxc puts the container into the | |
2290 | # STOPPED state. | |
e0e29818 TL |
2291 | # $kill - if true it will always do an immediate hard-stop |
2292 | # $shutdown_timeout - the timeout to wait for a gracefull shutdown | |
2293 | # $kill_after_timeout - if true, send a hardstop if shutdown timed out | |
b1bad293 | 2294 | sub vm_stop { |
e0e29818 | 2295 | my ($vmid, $kill, $shutdown_timeout, $kill_after_timeout) = @_; |
b1bad293 WB |
2296 | |
2297 | # Open the container's command socket. | |
2298 | my $path = "\0/var/lib/lxc/$vmid/command"; | |
2299 | my $sock = IO::Socket::UNIX->new( | |
2300 | Type => SOCK_STREAM(), | |
2301 | Peer => $path, | |
2302 | ); | |
2303 | if (!$sock) { | |
2304 | return if $! == ECONNREFUSED; # The container is not running | |
2305 | die "failed to open container ${vmid}'s command socket: $!\n"; | |
2306 | } | |
2307 | ||
1a416433 DC |
2308 | my $conf = PVE::LXC::Config->load_config($vmid); |
2309 | PVE::GuestHelpers::exec_hookscript($conf, $vmid, 'pre-stop'); | |
2310 | ||
b1bad293 WB |
2311 | # Stop the container: |
2312 | ||
2313 | my $cmd = ['lxc-stop', '-n', $vmid]; | |
2314 | ||
2315 | if ($kill) { | |
2316 | push @$cmd, '--kill'; # doesn't allow timeouts | |
e0e29818 TL |
2317 | } else { |
2318 | # lxc-stop uses a default timeout | |
2319 | push @$cmd, '--nokill' if !$kill_after_timeout; | |
2320 | ||
2321 | if (defined($shutdown_timeout)) { | |
2322 | push @$cmd, '--timeout', $shutdown_timeout; | |
2323 | # Give run_command 5 extra seconds | |
2324 | $shutdown_timeout += 5; | |
2325 | } | |
b1bad293 WB |
2326 | } |
2327 | ||
2328 | eval { PVE::Tools::run_command($cmd, timeout => $shutdown_timeout) }; | |
2329 | if (my $err = $@) { | |
2330 | warn $@ if $@; | |
2331 | } | |
2332 | ||
8d41edef | 2333 | my $result = <$sock>; |
b1bad293 WB |
2334 | |
2335 | return if !defined $result; # monitor is gone and the ct has stopped. | |
2336 | die "container did not stop\n"; | |
2337 | } | |
846a66b0 | 2338 | |
f5fe1125 OB |
2339 | sub vm_reboot { |
2340 | my ($vmid, $timeout, $skiplock) = @_; | |
2341 | ||
2342 | PVE::LXC::Config->lock_config($vmid, sub { | |
2343 | return if !check_running($vmid); | |
2344 | ||
2345 | vm_stop($vmid, 0, $timeout, 1); # kill if timeout exceeds | |
2346 | ||
2347 | my $conf = PVE::LXC::Config->load_config($vmid); | |
2348 | vm_start($vmid, $conf); | |
2349 | }); | |
2350 | } | |
2351 | ||
00501642 WB |
2352 | sub run_unshared { |
2353 | my ($code) = @_; | |
2354 | ||
2355 | return PVE::Tools::run_fork(sub { | |
2356 | # Unshare the mount namespace | |
2357 | die "failed to unshare mount namespace: $!\n" | |
2358 | if !PVE::Tools::unshare(PVE::Tools::CLONE_NEWNS); | |
2359 | PVE::Tools::run_command(['mount', '--make-rslave', '/']); | |
2360 | return $code->(); | |
2361 | }); | |
2362 | } | |
2363 | ||
2364 | my $copy_volume = sub { | |
4c98d66c | 2365 | my ($src_volid, $src, $dst_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid) = @_; |
00501642 | 2366 | |
fd8cab92 | 2367 | my $src_mp = { volume => $src_volid, mp => '/', ro => 1 }; |
00501642 WB |
2368 | $src_mp->{type} = PVE::LXC::Config->classify_mountpoint($src_volid); |
2369 | ||
fd8cab92 | 2370 | my $dst_mp = { volume => $dst_volid, mp => '/', ro => 0 }; |
00501642 WB |
2371 | $dst_mp->{type} = PVE::LXC::Config->classify_mountpoint($dst_volid); |
2372 | ||
2373 | my @mounted; | |
2374 | eval { | |
2375 | # mount and copy | |
2376 | mkdir $src; | |
4c98d66c | 2377 | mountpoint_mount($src_mp, $src, $storage_cfg, $snapname, $rootuid, $rootgid); |
00501642 WB |
2378 | push @mounted, $src; |
2379 | mkdir $dest; | |
4c98d66c | 2380 | mountpoint_mount($dst_mp, $dest, $storage_cfg, undef, $rootuid, $rootgid); |
00501642 WB |
2381 | push @mounted, $dest; |
2382 | ||
08540353 SI |
2383 | $bwlimit //= 0; |
2384 | ||
00501642 WB |
2385 | PVE::Tools::run_command(['/usr/bin/rsync', '--stats', '-X', '-A', '--numeric-ids', |
2386 | '-aH', '--whole-file', '--sparse', '--one-file-system', | |
08540353 | 2387 | "--bwlimit=$bwlimit", "$src/", $dest]); |
00501642 WB |
2388 | }; |
2389 | my $err = $@; | |
75c2677f DJ |
2390 | |
2391 | # Wait for rsync's children to release dest so that | |
2392 | # consequent file operations (umount, remove) are possible | |
2393 | while ((system {"fuser"} "fuser", "-s", $dest) == 0) {sleep 1}; | |
2394 | ||
00501642 | 2395 | foreach my $mount (reverse @mounted) { |
75c2677f | 2396 | eval { PVE::Tools::run_command(['/bin/umount', $mount], errfunc => sub{})}; |
00501642 WB |
2397 | warn "Can't umount $mount\n" if $@; |
2398 | } | |
2399 | ||
2400 | # If this fails they're used as mount points in a concurrent operation | |
2401 | # (which should not happen but there's also no real need to get rid of them). | |
2402 | rmdir $dest; | |
2403 | rmdir $src; | |
2404 | ||
2405 | die $err if $err; | |
2406 | }; | |
2407 | ||
2408 | # Should not be called after unsharing the mount namespace! | |
2409 | sub copy_volume { | |
08540353 | 2410 | my ($mp, $vmid, $storage, $storage_cfg, $conf, $snapname, $bwlimit) = @_; |
00501642 WB |
2411 | |
2412 | die "cannot copy volumes of type $mp->{type}\n" if $mp->{type} ne 'volume'; | |
2413 | File::Path::make_path("/var/lib/lxc/$vmid"); | |
2414 | my $dest = "/var/lib/lxc/$vmid/.copy-volume-1"; | |
2415 | my $src = "/var/lib/lxc/$vmid/.copy-volume-2"; | |
2416 | ||
2417 | # get id's for unprivileged container | |
2418 | my (undef, $rootuid, $rootgid) = parse_id_maps($conf); | |
2419 | ||
2420 | # Allocate the disk before unsharing in order to make sure zfs subvolumes | |
2421 | # are visible in this namespace, otherwise the host only sees the empty | |
2422 | # (not-mounted) directory. | |
2423 | my $new_volid; | |
2424 | eval { | |
5154e3e9 WB |
2425 | # Make sure $mp contains a correct size. |
2426 | $mp->{size} = PVE::Storage::volume_size_info($storage_cfg, $mp->{volume}); | |
00501642 WB |
2427 | my $needs_chown; |
2428 | ($new_volid, $needs_chown) = alloc_disk($storage_cfg, $vmid, $storage, $mp->{size}/1024, $rootuid, $rootgid); | |
2429 | if ($needs_chown) { | |
2430 | PVE::Storage::activate_volumes($storage_cfg, [$new_volid], undef); | |
2431 | my $path = PVE::Storage::path($storage_cfg, $new_volid, undef); | |
2432 | chown($rootuid, $rootgid, $path); | |
2433 | } | |
2434 | ||
2435 | run_unshared(sub { | |
4c98d66c | 2436 | $copy_volume->($mp->{volume}, $src, $new_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid); |
00501642 WB |
2437 | }); |
2438 | }; | |
2439 | if (my $err = $@) { | |
2440 | PVE::Storage::vdisk_free($storage_cfg, $new_volid) | |
2441 | if defined($new_volid); | |
2442 | die $err; | |
2443 | } | |
2444 | ||
2445 | return $new_volid; | |
2446 | } | |
2447 | ||
022a70ff WB |
2448 | sub get_lxc_version() { |
2449 | my $version; | |
2450 | PVE::Tools::run_command([qw(lxc-start --version)], outfunc => sub { | |
2451 | my ($line) = @_; | |
2452 | # We only parse out major & minor version numbers. | |
2453 | if ($line =~ /^(\d+)\.(\d+)(?:\D.*)?$/) { | |
2454 | $version = [$1, $2]; | |
2455 | } | |
2456 | }); | |
2457 | ||
2458 | die "failed to get lxc version\n" if !defined($version); | |
2459 | ||
2460 | # return as a list: | |
2461 | return $version->@*; | |
2462 | } | |
2463 | ||
89424a8b TL |
2464 | sub freeze($) { |
2465 | my ($vmid) = @_; | |
2466 | PVE::LXC::CGroup->new($vmid)->freeze_thaw(1); | |
2467 | } | |
c9b25dfd | 2468 | |
89424a8b TL |
2469 | sub thaw($) { |
2470 | my ($vmid) = @_; | |
2471 | PVE::LXC::CGroup->new($vmid)->freeze_thaw(0); | |
c9b25dfd WB |
2472 | } |
2473 | ||
f76a2828 | 2474 | 1; |