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Commit | Line | Data |
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58a3c91c FG |
1 | package PVE::AbstractConfig; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
6 | use PVE::Tools qw(lock_file lock_file_full); | |
7 | use PVE::INotify; | |
8 | use PVE::Cluster; | |
9 | use PVE::Storage; | |
10 | ||
67b3581e | 11 | use PVE::GuestHelpers qw(typesafe_ne); |
14f17b49 DM |
12 | use PVE::ReplicationConfig; |
13 | use PVE::Replication; | |
14 | ||
58a3c91c FG |
15 | my $nodename = PVE::INotify::nodename(); |
16 | ||
17 | # Printable string, currently either "VM" or "CT" | |
18 | sub guest_type { | |
19 | my ($class) = @_; | |
20 | die "abstract method - implement me "; | |
21 | } | |
22 | ||
23 | sub __config_max_unused_disks { | |
24 | my ($class) = @_; | |
25 | ||
26 | die "implement me - abstract method\n"; | |
27 | } | |
28 | ||
29 | # Path to the flock file for this VM/CT | |
30 | sub config_file_lock { | |
31 | my ($class, $vmid) = @_; | |
32 | die "abstract method - implement me"; | |
33 | } | |
34 | ||
35 | # Relative config file path for this VM/CT in CFS | |
36 | sub cfs_config_path { | |
37 | my ($class, $vmid, $node) = @_; | |
38 | die "abstract method - implement me"; | |
39 | } | |
40 | ||
41 | # Absolute config file path for this VM/CT | |
42 | sub config_file { | |
43 | my ($class, $vmid, $node) = @_; | |
44 | ||
45 | my $cfspath = $class->cfs_config_path($vmid, $node); | |
46 | return "/etc/pve/$cfspath"; | |
47 | } | |
48 | ||
49 | # Read and parse config file for this VM/CT | |
50 | sub load_config { | |
51 | my ($class, $vmid, $node) = @_; | |
52 | ||
53 | $node = $nodename if !$node; | |
54 | my $cfspath = $class->cfs_config_path($vmid, $node); | |
55 | ||
56 | my $conf = PVE::Cluster::cfs_read_file($cfspath); | |
57 | die "Configuration file '$cfspath' does not exist\n" | |
58 | if !defined($conf); | |
59 | ||
60 | return $conf; | |
61 | } | |
62 | ||
63 | # Generate and write config file for this VM/CT | |
64 | sub write_config { | |
65 | my ($class, $vmid, $conf) = @_; | |
66 | ||
67 | my $cfspath = $class->cfs_config_path($vmid); | |
68 | ||
69 | PVE::Cluster::cfs_write_file($cfspath, $conf); | |
70 | } | |
71 | ||
810ee088 OB |
72 | # Pending changes related |
73 | ||
74 | sub parse_pending_delete { | |
75 | my ($class, $data) = @_; | |
7b9d1ade TL |
76 | |
77 | return {} if !$data; | |
78 | ||
810ee088 OB |
79 | $data =~ s/[,;]/ /g; |
80 | $data =~ s/^\s+//; | |
7b9d1ade TL |
81 | |
82 | my $pending_deletions = {}; | |
83 | for my $entry (split(/\s+/, $data)) { | |
84 | my ($force, $key) = $entry =~ /^(!?)(.*)$/; | |
85 | ||
86 | $pending_deletions->{$key} = { | |
87 | force => $force ? 1 : 0, | |
88 | }; | |
89 | } | |
90 | ||
91 | return $pending_deletions; | |
810ee088 OB |
92 | } |
93 | ||
94 | sub print_pending_delete { | |
95 | my ($class, $delete_hash) = @_; | |
51088c75 TL |
96 | |
97 | my $render_key = sub { | |
98 | my $key = shift; | |
99 | $key = "!$key" if $delete_hash->{$key}->{force}; | |
100 | return $key; | |
101 | }; | |
102 | ||
6a6ad855 | 103 | join (',', map { $render_key->($_) } sort keys %$delete_hash); |
810ee088 OB |
104 | } |
105 | ||
106 | sub add_to_pending_delete { | |
107 | my ($class, $conf, $key, $force) = @_; | |
108 | ||
51e827b8 TL |
109 | $conf->{pending} //= {}; |
110 | my $pending = $conf->{pending}; | |
111 | my $pending_delete_hash = $class->parse_pending_delete($pending->{delete}); | |
112 | ||
113 | $pending_delete_hash->{$key} = { force => $force }; | |
114 | ||
115 | $pending->{delete} = $class->print_pending_delete($pending_delete_hash); | |
116 | ||
117 | return $conf; | |
810ee088 OB |
118 | } |
119 | ||
120 | sub remove_from_pending_delete { | |
121 | my ($class, $conf, $key) = @_; | |
122 | ||
464a42c4 TL |
123 | my $pending = $conf->{pending}; |
124 | my $pending_delete_hash = $class->parse_pending_delete($pending->{delete}); | |
125 | ||
126 | return $conf if ! exists $pending_delete_hash->{$key}; | |
127 | ||
810ee088 OB |
128 | delete $pending_delete_hash->{$key}; |
129 | ||
130 | if (%$pending_delete_hash) { | |
464a42c4 | 131 | $pending->{delete} = $class->print_pending_delete($pending_delete_hash); |
810ee088 | 132 | } else { |
464a42c4 | 133 | delete $pending->{delete}; |
810ee088 | 134 | } |
464a42c4 TL |
135 | |
136 | return $conf; | |
810ee088 OB |
137 | } |
138 | ||
139 | sub cleanup_pending { | |
140 | my ($class, $conf) = @_; | |
141 | ||
c24919a9 | 142 | my $pending = $conf->{pending}; |
810ee088 OB |
143 | # remove pending changes when nothing changed |
144 | my $changes; | |
145 | foreach my $opt (keys %{$conf->{pending}}) { | |
146 | next if $opt eq 'delete'; # just to be sure | |
9420142c | 147 | if (defined($conf->{$opt}) && ($pending->{$opt} eq $conf->{$opt})) { |
810ee088 | 148 | $changes = 1; |
c24919a9 | 149 | delete $pending->{$opt}; |
810ee088 OB |
150 | } |
151 | } | |
152 | ||
c24919a9 | 153 | my $current_delete_hash = $class->parse_pending_delete($pending->{delete}); |
810ee088 | 154 | my $pending_delete_hash = {}; |
c24919a9 | 155 | for my $opt (keys %$current_delete_hash) { |
810ee088 | 156 | if (defined($conf->{$opt})) { |
c24919a9 | 157 | $pending_delete_hash->{$opt} = $current_delete_hash->{$opt}; |
810ee088 OB |
158 | } else { |
159 | $changes = 1; | |
160 | } | |
161 | } | |
162 | ||
163 | if (%$pending_delete_hash) { | |
c24919a9 | 164 | $pending->{delete} = $class->print_pending_delete($pending_delete_hash); |
810ee088 | 165 | } else { |
c24919a9 | 166 | delete $pending->{delete}; |
810ee088 OB |
167 | } |
168 | ||
169 | return $changes; | |
170 | } | |
171 | ||
866f5834 OB |
172 | sub get_partial_fast_plug_option { |
173 | my ($class) = @_; | |
174 | ||
175 | die "abstract method - implement me "; | |
176 | } | |
177 | ||
178 | sub partial_fast_plug { | |
179 | my ($class, $conf, $opt) = @_; | |
180 | ||
181 | my $partial_fast_plug_option = $class->get_partial_fast_plug_option(); | |
47d7954c TL |
182 | return 0 if !$partial_fast_plug_option->{$opt}; |
183 | ||
866f5834 OB |
184 | my $format = $partial_fast_plug_option->{$opt}->{fmt}; |
185 | my $fast_pluggable = $partial_fast_plug_option->{$opt}->{properties}; | |
186 | ||
187 | my $configured = {}; | |
188 | if (exists($conf->{$opt})) { | |
189 | $configured = PVE::JSONSchema::parse_property_string($format, $conf->{$opt}); | |
190 | } | |
191 | my $pending = PVE::JSONSchema::parse_property_string($format, $conf->{pending}->{$opt}); | |
192 | ||
193 | my $changes = 0; | |
194 | ||
195 | # merge configured and pending opts to iterate | |
196 | my @all_keys = keys %{{ %$pending, %$configured }}; | |
197 | ||
198 | foreach my $subopt (@all_keys) { | |
199 | my $type = $format->{$subopt}->{type}; | |
67b3581e | 200 | if (typesafe_ne($configured->{$subopt}, $pending->{$subopt}, $type)) { |
866f5834 OB |
201 | if ($fast_pluggable->{$subopt}) { |
202 | $configured->{$subopt} = $pending->{$subopt}; | |
203 | $changes = 1 | |
204 | } | |
205 | } | |
206 | } | |
207 | ||
208 | # if there're no keys in $configured (after merge) there shouldn't be anything to change | |
209 | if (keys %$configured) { | |
210 | $conf->{$opt} = PVE::JSONSchema::print_property_string($configured, $format); | |
211 | } | |
212 | ||
213 | return $changes; | |
214 | } | |
215 | ||
216 | ||
61264e82 OB |
217 | sub load_snapshot_config { |
218 | my ($class, $vmid, $snapname) = @_; | |
219 | ||
220 | my $conf = $class->load_config($vmid); | |
221 | ||
222 | my $snapshot = $conf->{snapshots}->{$snapname}; | |
223 | die "snapshot '$snapname' does not exist\n" if !defined($snapshot); | |
224 | ||
225 | $snapshot->{digest} = $conf->{digest}; | |
226 | ||
227 | return $snapshot; | |
228 | ||
229 | } | |
230 | ||
231 | sub load_current_config { | |
232 | my ($class, $vmid, $current) = @_; | |
233 | ||
234 | my $conf = $class->load_config($vmid); | |
235 | ||
236 | # take pending changes in | |
237 | if (!$current) { | |
238 | foreach my $opt (keys %{$conf->{pending}}) { | |
239 | next if $opt eq 'delete'; | |
240 | my $value = $conf->{pending}->{$opt}; | |
241 | next if ref($value); # just to be sure | |
242 | $conf->{$opt} = $value; | |
243 | } | |
244 | my $pending_delete_hash = $class->parse_pending_delete($conf->{pending}->{delete}); | |
245 | foreach my $opt (keys %$pending_delete_hash) { | |
246 | delete $conf->{$opt} if $conf->{$opt}; | |
247 | } | |
248 | } | |
249 | ||
250 | delete $conf->{snapshots}; | |
251 | delete $conf->{pending}; | |
252 | ||
253 | return $conf; | |
254 | } | |
255 | ||
256 | ||
58a3c91c | 257 | # Lock config file using flock, run $code with @param, unlock config file. |
ab44df53 | 258 | # $timeout is the maximum time to acquire the flock |
58a3c91c FG |
259 | sub lock_config_full { |
260 | my ($class, $vmid, $timeout, $code, @param) = @_; | |
261 | ||
262 | my $filename = $class->config_file_lock($vmid); | |
263 | ||
264 | my $res = lock_file($filename, $timeout, $code, @param); | |
265 | ||
266 | die $@ if $@; | |
267 | ||
268 | return $res; | |
269 | } | |
270 | ||
cbbb06a5 | 271 | sub create_and_lock_config { |
fde98d5e | 272 | my ($class, $vmid, $allow_existing, $lock) = @_; |
cbbb06a5 TL |
273 | |
274 | $class->lock_config_full($vmid, 5, sub { | |
275 | PVE::Cluster::check_vmid_unused($vmid, $allow_existing); | |
276 | ||
277 | my $conf = eval { $class->load_config($vmid) } || {}; | |
278 | $class->check_lock($conf); | |
fde98d5e | 279 | $conf->{lock} = $lock // 'create'; |
cbbb06a5 TL |
280 | $class->write_config($vmid, $conf); |
281 | }); | |
282 | } | |
283 | ||
ab44df53 | 284 | # destroys configuration, only applicable for configs owned by the callers node. |
1aa76f2f TL |
285 | # dies if removal fails, e.g., when inquorate. |
286 | sub destroy_config { | |
287 | my ($class, $vmid) = @_; | |
288 | ||
289 | my $config_fn = $class->config_file($vmid, $nodename); | |
290 | unlink $config_fn or die "failed to remove config file: $!\n"; | |
291 | } | |
292 | ||
58a3c91c | 293 | # Lock config file using flock, run $code with @param, unlock config file. |
ab44df53 | 294 | # $timeout is the maximum time to acquire the flock |
58a3c91c FG |
295 | # $shared eq 1 creates a non-exclusive ("read") flock |
296 | sub lock_config_mode { | |
297 | my ($class, $vmid, $timeout, $shared, $code, @param) = @_; | |
298 | ||
299 | my $filename = $class->config_file_lock($vmid); | |
300 | ||
301 | my $res = lock_file_full($filename, $timeout, $shared, $code, @param); | |
302 | ||
303 | die $@ if $@; | |
304 | ||
305 | return $res; | |
306 | } | |
307 | ||
308 | # Lock config file using flock, run $code with @param, unlock config file. | |
309 | sub lock_config { | |
310 | my ($class, $vmid, $code, @param) = @_; | |
311 | ||
312 | return $class->lock_config_full($vmid, 10, $code, @param); | |
313 | } | |
314 | ||
315 | # Checks whether the config is locked with the lock parameter | |
316 | sub check_lock { | |
317 | my ($class, $conf) = @_; | |
318 | ||
319 | die $class->guest_type()." is locked ($conf->{lock})\n" if $conf->{lock}; | |
320 | } | |
321 | ||
322 | # Returns whether the config is locked with the lock parameter, also checks | |
323 | # whether the lock value is correct if the optional $lock is set. | |
324 | sub has_lock { | |
325 | my ($class, $conf, $lock) = @_; | |
326 | ||
327 | return $conf->{lock} && (!defined($lock) || $lock eq $conf->{lock}); | |
328 | } | |
329 | ||
330 | # Sets the lock parameter for this VM/CT's config to $lock. | |
331 | sub set_lock { | |
332 | my ($class, $vmid, $lock) = @_; | |
333 | ||
334 | my $conf; | |
335 | $class->lock_config($vmid, sub { | |
336 | $conf = $class->load_config($vmid); | |
337 | $class->check_lock($conf); | |
338 | $conf->{lock} = $lock; | |
339 | $class->write_config($vmid, $conf); | |
340 | }); | |
341 | return $conf; | |
342 | } | |
343 | ||
344 | # Removes the lock parameter for this VM/CT's config, also checks whether | |
345 | # the lock value is correct if the optional $lock is set. | |
346 | sub remove_lock { | |
347 | my ($class, $vmid, $lock) = @_; | |
348 | ||
349 | $class->lock_config($vmid, sub { | |
350 | my $conf = $class->load_config($vmid); | |
351 | if (!$conf->{lock}) { | |
352 | my $lockstring = defined($lock) ? "'$lock' " : "any"; | |
353 | die "no lock found trying to remove $lockstring lock\n"; | |
354 | } elsif (defined($lock) && $conf->{lock} ne $lock) { | |
355 | die "found lock '$conf->{lock}' trying to remove '$lock' lock\n"; | |
356 | } | |
357 | delete $conf->{lock}; | |
358 | $class->write_config($vmid, $conf); | |
359 | }); | |
360 | } | |
361 | ||
362 | # Checks whether protection mode is enabled for this VM/CT. | |
363 | sub check_protection { | |
364 | my ($class, $conf, $err_msg) = @_; | |
365 | ||
366 | if ($conf->{protection}) { | |
367 | die "$err_msg - protection mode enabled\n"; | |
368 | } | |
369 | } | |
370 | ||
371 | # Adds an unused volume to $config, if possible. | |
372 | sub add_unused_volume { | |
373 | my ($class, $config, $volid) = @_; | |
374 | ||
375 | my $key; | |
376 | for (my $ind = $class->__config_max_unused_disks() - 1; $ind >= 0; $ind--) { | |
377 | my $test = "unused$ind"; | |
378 | if (my $vid = $config->{$test}) { | |
379 | return if $vid eq $volid; # do not add duplicates | |
380 | } else { | |
381 | $key = $test; | |
382 | } | |
383 | } | |
384 | ||
385 | die "Too many unused volumes - please delete them first.\n" if !$key; | |
386 | ||
387 | $config->{$key} = $volid; | |
388 | ||
389 | return $key; | |
390 | } | |
391 | ||
392 | # Returns whether the template parameter is set in $conf. | |
393 | sub is_template { | |
394 | my ($class, $conf) = @_; | |
395 | ||
396 | return 1 if defined $conf->{template} && $conf->{template} == 1; | |
397 | } | |
398 | ||
ab44df53 | 399 | # Checks whether $feature is available for the referenced volumes in $conf. |
58a3c91c FG |
400 | # Note: depending on the parameters, some volumes may be skipped! |
401 | sub has_feature { | |
402 | my ($class, $feature, $conf, $storecfg, $snapname, $running, $backup_only) = @_; | |
403 | die "implement me - abstract method\n"; | |
404 | } | |
405 | ||
3f85b14d DM |
406 | # get all replicatable volume (hash $res->{$volid} = 1) |
407 | # $cleanup: for cleanup - simply ignores volumes without replicate feature | |
408 | # $norerr: never raise exceptions - return undef instead | |
409 | sub get_replicatable_volumes { | |
54b79ff5 | 410 | my ($class, $storecfg, $vmid, $conf, $cleanup, $noerr) = @_; |
3f85b14d DM |
411 | |
412 | die "implement me - abstract method\n"; | |
413 | } | |
414 | ||
1245ad85 TL |
415 | # Returns all the guests volumes which would be included in a vzdump job |
416 | # Return Format (array-ref with hash-refs as elements): | |
b2a2affa AL |
417 | # [ |
418 | # { | |
1245ad85 TL |
419 | # key, key in the config, e.g. mp0, scsi0,... |
420 | # included, boolean | |
421 | # reason, string | |
422 | # data volume object as returned from foreach_drive/foreach_mountpoint | |
423 | # }, | |
b2a2affa AL |
424 | # ] |
425 | sub get_backup_volumes { | |
426 | my ($class, $conf) = @_; | |
427 | ||
428 | die "implement me - abstract method\n"; | |
429 | } | |
430 | ||
58a3c91c FG |
431 | # Internal snapshots |
432 | ||
433 | # NOTE: Snapshot create/delete involves several non-atomic | |
434 | # actions, and can take a long time. | |
435 | # So we try to avoid locking the file and use the 'lock' variable | |
436 | # inside the config file instead. | |
437 | ||
438 | # Save the vmstate (RAM). | |
439 | sub __snapshot_save_vmstate { | |
440 | my ($class, $vmid, $conf, $snapname, $storecfg) = @_; | |
441 | die "implement me - abstract method\n"; | |
442 | } | |
443 | ||
444 | # Check whether the VM/CT is running. | |
445 | sub __snapshot_check_running { | |
446 | my ($class, $vmid) = @_; | |
447 | die "implement me - abstract method\n"; | |
448 | } | |
449 | ||
450 | # Check whether we need to freeze the VM/CT | |
451 | sub __snapshot_check_freeze_needed { | |
452 | my ($sself, $vmid, $config, $save_vmstate) = @_; | |
453 | die "implement me - abstract method\n"; | |
454 | } | |
455 | ||
456 | # Freeze or unfreeze the VM/CT. | |
457 | sub __snapshot_freeze { | |
458 | my ($class, $vmid, $unfreeze) = @_; | |
459 | ||
460 | die "abstract method - implement me\n"; | |
461 | } | |
462 | ||
463 | # Code run before and after creating all the volume snapshots | |
464 | # base: noop | |
465 | sub __snapshot_create_vol_snapshots_hook { | |
466 | my ($class, $vmid, $snap, $running, $hook) = @_; | |
467 | ||
468 | return; | |
469 | } | |
470 | ||
471 | # Create the volume snapshots for the VM/CT. | |
472 | sub __snapshot_create_vol_snapshot { | |
473 | my ($class, $vmid, $vs, $volume, $snapname) = @_; | |
474 | ||
475 | die "abstract method - implement me\n"; | |
476 | } | |
477 | ||
478 | # Remove a drive from the snapshot config. | |
479 | sub __snapshot_delete_remove_drive { | |
480 | my ($class, $snap, $drive) = @_; | |
481 | ||
482 | die "abstract method - implement me\n"; | |
483 | } | |
484 | ||
485 | # Delete the vmstate file/drive | |
486 | sub __snapshot_delete_vmstate_file { | |
487 | my ($class, $snap, $force) = @_; | |
488 | ||
489 | die "abstract method - implement me\n"; | |
490 | } | |
491 | ||
492 | # Delete a volume snapshot | |
493 | sub __snapshot_delete_vol_snapshot { | |
494 | my ($class, $vmid, $vs, $volume, $snapname) = @_; | |
495 | ||
496 | die "abstract method - implement me\n"; | |
497 | } | |
498 | ||
3fa4ce45 DC |
499 | # called during rollback prepare, and between config rollback and starting guest |
500 | # can change config, e.g. for vmgenid | |
501 | # $data is shared across calls and passed to vm_start | |
502 | sub __snapshot_rollback_hook { | |
503 | my ($class, $vmid, $conf, $snap, $prepare, $data) = @_; | |
504 | ||
505 | return; | |
506 | } | |
507 | ||
58a3c91c FG |
508 | # Checks whether a volume snapshot is possible for this volume. |
509 | sub __snapshot_rollback_vol_possible { | |
510 | my ($class, $volume, $snapname) = @_; | |
511 | ||
512 | die "abstract method - implement me\n"; | |
513 | } | |
514 | ||
515 | # Rolls back this volume. | |
516 | sub __snapshot_rollback_vol_rollback { | |
517 | my ($class, $volume, $snapname) = @_; | |
518 | ||
519 | die "abstract method - implement me\n"; | |
520 | } | |
521 | ||
522 | # Stops the VM/CT for a rollback. | |
523 | sub __snapshot_rollback_vm_stop { | |
524 | my ($class, $vmid) = @_; | |
525 | ||
526 | die "abstract method - implement me\n"; | |
527 | } | |
528 | ||
529 | # Start the VM/CT after a rollback with restored vmstate. | |
530 | sub __snapshot_rollback_vm_start { | |
3fa4ce45 | 531 | my ($class, $vmid, $vmstate, $data); |
58a3c91c FG |
532 | |
533 | die "abstract method - implement me\n"; | |
534 | } | |
535 | ||
536 | # Get list of volume IDs which are referenced in $conf, but not in $snap. | |
537 | sub __snapshot_rollback_get_unused { | |
538 | my ($class, $conf, $snap) = @_; | |
539 | ||
540 | die "abstract method - implement me\n"; | |
541 | } | |
542 | ||
543 | # Iterate over all configured volumes, calling $func for each key/value pair. | |
544 | sub __snapshot_foreach_volume { | |
545 | my ($class, $conf, $func) = @_; | |
546 | ||
547 | die "abstract method - implement me\n"; | |
548 | } | |
549 | ||
550 | # Copy the current config $source to the snapshot config $dest | |
551 | sub __snapshot_copy_config { | |
552 | my ($class, $source, $dest) = @_; | |
553 | ||
554 | foreach my $k (keys %$source) { | |
555 | next if $k eq 'snapshots'; | |
556 | next if $k eq 'snapstate'; | |
557 | next if $k eq 'snaptime'; | |
558 | next if $k eq 'vmstate'; | |
559 | next if $k eq 'lock'; | |
560 | next if $k eq 'digest'; | |
561 | next if $k eq 'description'; | |
562 | next if $k =~ m/^unused\d+$/; | |
563 | ||
564 | $dest->{$k} = $source->{$k}; | |
565 | } | |
566 | }; | |
567 | ||
568 | # Apply the snapshot config $snap to the config $conf (rollback) | |
569 | sub __snapshot_apply_config { | |
570 | my ($class, $conf, $snap) = @_; | |
571 | ||
572 | # copy snapshot list | |
573 | my $newconf = { | |
574 | snapshots => $conf->{snapshots}, | |
575 | }; | |
576 | ||
eb74d483 | 577 | # keep description and list of unused disks |
58a3c91c | 578 | foreach my $k (keys %$conf) { |
eb74d483 | 579 | next if !($k =~ m/^unused\d+$/ || $k eq 'description'); |
38532f70 | 580 | |
58a3c91c FG |
581 | $newconf->{$k} = $conf->{$k}; |
582 | } | |
583 | ||
584 | $class->__snapshot_copy_config($snap, $newconf); | |
585 | ||
586 | return $newconf; | |
587 | } | |
588 | ||
589 | # Prepares the configuration for snapshotting. | |
590 | sub __snapshot_prepare { | |
591 | my ($class, $vmid, $snapname, $save_vmstate, $comment) = @_; | |
592 | ||
593 | my $snap; | |
594 | ||
595 | my $updatefn = sub { | |
596 | ||
597 | my $conf = $class->load_config($vmid); | |
598 | ||
599 | die "you can't take a snapshot if it's a template\n" | |
600 | if $class->is_template($conf); | |
601 | ||
602 | $class->check_lock($conf); | |
603 | ||
604 | $conf->{lock} = 'snapshot'; | |
605 | ||
606 | die "snapshot name '$snapname' already used\n" | |
607 | if defined($conf->{snapshots}->{$snapname}); | |
608 | ||
609 | my $storecfg = PVE::Storage::config(); | |
610 | die "snapshot feature is not available\n" | |
611 | if !$class->has_feature('snapshot', $conf, $storecfg, undef, undef, $snapname eq 'vzdump'); | |
612 | ||
613 | $snap = $conf->{snapshots}->{$snapname} = {}; | |
614 | ||
615 | if ($save_vmstate && $class->__snapshot_check_running($vmid)) { | |
616 | $class->__snapshot_save_vmstate($vmid, $conf, $snapname, $storecfg); | |
617 | } | |
618 | ||
619 | $class->__snapshot_copy_config($conf, $snap); | |
620 | ||
621 | $snap->{snapstate} = "prepare"; | |
622 | $snap->{snaptime} = time(); | |
623 | $snap->{description} = $comment if $comment; | |
624 | ||
625 | $class->write_config($vmid, $conf); | |
626 | }; | |
627 | ||
628 | $class->lock_config($vmid, $updatefn); | |
629 | ||
630 | return $snap; | |
631 | } | |
632 | ||
633 | # Commits the configuration after snapshotting. | |
634 | sub __snapshot_commit { | |
635 | my ($class, $vmid, $snapname) = @_; | |
636 | ||
637 | my $updatefn = sub { | |
638 | ||
639 | my $conf = $class->load_config($vmid); | |
640 | ||
641 | die "missing snapshot lock\n" | |
642 | if !($conf->{lock} && $conf->{lock} eq 'snapshot'); | |
643 | ||
644 | my $snap = $conf->{snapshots}->{$snapname}; | |
645 | die "snapshot '$snapname' does not exist\n" if !defined($snap); | |
646 | ||
647 | die "wrong snapshot state\n" | |
648 | if !($snap->{snapstate} && $snap->{snapstate} eq "prepare"); | |
649 | ||
650 | delete $snap->{snapstate}; | |
651 | delete $conf->{lock}; | |
652 | ||
653 | $conf->{parent} = $snapname; | |
654 | ||
655 | $class->write_config($vmid, $conf); | |
656 | }; | |
657 | ||
658 | $class->lock_config($vmid, $updatefn); | |
659 | } | |
660 | ||
661 | # Creates a snapshot for the VM/CT. | |
662 | sub snapshot_create { | |
663 | my ($class, $vmid, $snapname, $save_vmstate, $comment) = @_; | |
664 | ||
665 | my $snap = $class->__snapshot_prepare($vmid, $snapname, $save_vmstate, $comment); | |
666 | ||
667 | $save_vmstate = 0 if !$snap->{vmstate}; | |
668 | ||
669 | my $conf = $class->load_config($vmid); | |
670 | ||
671 | my ($running, $freezefs) = $class->__snapshot_check_freeze_needed($vmid, $conf, $snap->{vmstate}); | |
672 | ||
673 | my $drivehash = {}; | |
674 | ||
675 | eval { | |
676 | if ($freezefs) { | |
677 | $class->__snapshot_freeze($vmid, 0); | |
678 | } | |
679 | ||
680 | $class->__snapshot_create_vol_snapshots_hook($vmid, $snap, $running, "before"); | |
681 | ||
682 | $class->__snapshot_foreach_volume($snap, sub { | |
683 | my ($vs, $volume) = @_; | |
684 | ||
685 | $class->__snapshot_create_vol_snapshot($vmid, $vs, $volume, $snapname); | |
686 | $drivehash->{$vs} = 1; | |
687 | }); | |
688 | }; | |
689 | my $err = $@; | |
690 | ||
691 | if ($running) { | |
692 | $class->__snapshot_create_vol_snapshots_hook($vmid, $snap, $running, "after"); | |
693 | if ($freezefs) { | |
694 | $class->__snapshot_freeze($vmid, 1); | |
695 | } | |
696 | $class->__snapshot_create_vol_snapshots_hook($vmid, $snap, $running, "after-unfreeze"); | |
697 | } | |
698 | ||
699 | if ($err) { | |
700 | warn "snapshot create failed: starting cleanup\n"; | |
701 | eval { $class->snapshot_delete($vmid, $snapname, 1, $drivehash); }; | |
702 | warn "$@" if $@; | |
703 | die "$err\n"; | |
704 | } | |
705 | ||
706 | $class->__snapshot_commit($vmid, $snapname); | |
707 | } | |
708 | ||
709 | # Deletes a snapshot. | |
710 | # Note: $drivehash is only set when called from snapshot_create. | |
711 | sub snapshot_delete { | |
712 | my ($class, $vmid, $snapname, $force, $drivehash) = @_; | |
713 | ||
714 | my $prepare = 1; | |
715 | ||
58a3c91c FG |
716 | my $unused = []; |
717 | ||
4c3144ea AA |
718 | my $conf = $class->load_config($vmid); |
719 | my $snap = $conf->{snapshots}->{$snapname}; | |
720 | ||
721 | die "snapshot '$snapname' does not exist\n" if !defined($snap); | |
722 | ||
58a3c91c FG |
723 | $class->set_lock($vmid, 'snapshot-delete') |
724 | if (!$drivehash); # doesn't already have a 'snapshot' lock | |
725 | ||
726 | my $unlink_parent = sub { | |
727 | my ($confref, $new_parent) = @_; | |
728 | ||
729 | if ($confref->{parent} && $confref->{parent} eq $snapname) { | |
730 | if ($new_parent) { | |
731 | $confref->{parent} = $new_parent; | |
732 | } else { | |
733 | delete $confref->{parent}; | |
734 | } | |
735 | } | |
736 | }; | |
737 | ||
738 | my $remove_drive = sub { | |
739 | my ($drive) = @_; | |
740 | ||
741 | my $conf = $class->load_config($vmid); | |
742 | $snap = $conf->{snapshots}->{$snapname}; | |
743 | die "snapshot '$snapname' does not exist\n" if !defined($snap); | |
744 | ||
745 | $class->__snapshot_delete_remove_drive($snap, $drive); | |
746 | ||
747 | $class->write_config($vmid, $conf); | |
748 | }; | |
749 | ||
750 | #prepare | |
751 | $class->lock_config($vmid, sub { | |
752 | my $conf = $class->load_config($vmid); | |
753 | ||
754 | die "you can't delete a snapshot if vm is a template\n" | |
755 | if $class->is_template($conf); | |
756 | ||
757 | $snap = $conf->{snapshots}->{$snapname}; | |
758 | die "snapshot '$snapname' does not exist\n" if !defined($snap); | |
759 | ||
760 | $snap->{snapstate} = 'delete'; | |
761 | ||
762 | $class->write_config($vmid, $conf); | |
763 | }); | |
764 | ||
765 | # now remove vmstate file | |
766 | if ($snap->{vmstate}) { | |
767 | $class->__snapshot_delete_vmstate_file($snap, $force); | |
768 | ||
769 | # save changes (remove vmstate from snapshot) | |
770 | $class->lock_config($vmid, $remove_drive, 'vmstate') if !$force; | |
771 | }; | |
772 | ||
773 | # now remove all volume snapshots | |
774 | $class->__snapshot_foreach_volume($snap, sub { | |
775 | my ($vs, $volume) = @_; | |
776 | ||
777 | return if $snapname eq 'vzdump' && $vs ne 'rootfs' && !$volume->{backup}; | |
778 | if (!$drivehash || $drivehash->{$vs}) { | |
779 | eval { $class->__snapshot_delete_vol_snapshot($vmid, $vs, $volume, $snapname, $unused); }; | |
780 | if (my $err = $@) { | |
781 | die $err if !$force; | |
782 | warn $err; | |
783 | } | |
784 | } | |
785 | ||
786 | # save changes (remove drive from snapshot) | |
787 | $class->lock_config($vmid, $remove_drive, $vs) if !$force; | |
788 | }); | |
789 | ||
790 | # now cleanup config | |
791 | $class->lock_config($vmid, sub { | |
792 | my $conf = $class->load_config($vmid); | |
793 | $snap = $conf->{snapshots}->{$snapname}; | |
794 | die "snapshot '$snapname' does not exist\n" if !defined($snap); | |
795 | ||
796 | # remove parent refs | |
797 | &$unlink_parent($conf, $snap->{parent}); | |
798 | foreach my $sn (keys %{$conf->{snapshots}}) { | |
799 | next if $sn eq $snapname; | |
800 | &$unlink_parent($conf->{snapshots}->{$sn}, $snap->{parent}); | |
801 | } | |
802 | ||
803 | ||
804 | delete $conf->{snapshots}->{$snapname}; | |
805 | delete $conf->{lock}; | |
806 | foreach my $volid (@$unused) { | |
807 | $class->add_unused_volume($conf, $volid); | |
808 | } | |
809 | ||
810 | $class->write_config($vmid, $conf); | |
811 | }); | |
812 | } | |
813 | ||
814 | # Rolls back to a given snapshot. | |
815 | sub snapshot_rollback { | |
816 | my ($class, $vmid, $snapname) = @_; | |
817 | ||
818 | my $prepare = 1; | |
819 | ||
820 | my $storecfg = PVE::Storage::config(); | |
821 | ||
822 | my $conf = $class->load_config($vmid); | |
823 | ||
824 | my $get_snapshot_config = sub { | |
825 | ||
826 | die "you can't rollback if vm is a template\n" if $class->is_template($conf); | |
827 | ||
828 | my $res = $conf->{snapshots}->{$snapname}; | |
829 | ||
830 | die "snapshot '$snapname' does not exist\n" if !defined($res); | |
831 | ||
832 | return $res; | |
833 | }; | |
834 | ||
683a30e0 WL |
835 | my $repl_conf = PVE::ReplicationConfig->new(); |
836 | if ($repl_conf->check_for_existing_jobs($vmid, 1)) { | |
837 | # remove all replication snapshots | |
c324e907 | 838 | my $volumes = $class->get_replicatable_volumes($storecfg, $vmid, $conf, 1); |
683a30e0 WL |
839 | my $sorted_volids = [ sort keys %$volumes ]; |
840 | ||
841 | # remove all local replication snapshots (jobid => undef) | |
842 | my $logfunc = sub { my $line = shift; chomp $line; print "$line\n"; }; | |
843 | PVE::Replication::prepare($storecfg, $sorted_volids, undef, 0, undef, $logfunc); | |
844 | } | |
845 | ||
58a3c91c FG |
846 | my $snap = &$get_snapshot_config(); |
847 | ||
848 | $class->__snapshot_foreach_volume($snap, sub { | |
849 | my ($vs, $volume) = @_; | |
850 | ||
851 | $class->__snapshot_rollback_vol_possible($volume, $snapname); | |
852 | }); | |
853 | ||
3fa4ce45 DC |
854 | my $data = {}; |
855 | ||
58a3c91c FG |
856 | my $updatefn = sub { |
857 | ||
858 | $conf = $class->load_config($vmid); | |
859 | ||
860 | $snap = &$get_snapshot_config(); | |
861 | ||
862 | die "unable to rollback to incomplete snapshot (snapstate = $snap->{snapstate})\n" | |
863 | if $snap->{snapstate}; | |
864 | ||
865 | if ($prepare) { | |
866 | $class->check_lock($conf); | |
867 | $class->__snapshot_rollback_vm_stop($vmid); | |
868 | } | |
869 | ||
870 | die "unable to rollback vm $vmid: vm is running\n" | |
871 | if $class->__snapshot_check_running($vmid); | |
872 | ||
873 | if ($prepare) { | |
874 | $conf->{lock} = 'rollback'; | |
875 | } else { | |
876 | die "got wrong lock\n" if !($conf->{lock} && $conf->{lock} eq 'rollback'); | |
877 | delete $conf->{lock}; | |
58a3c91c | 878 | |
58a3c91c FG |
879 | my $unused = $class->__snapshot_rollback_get_unused($conf, $snap); |
880 | ||
881 | foreach my $volid (@$unused) { | |
882 | $class->add_unused_volume($conf, $volid); | |
883 | } | |
884 | ||
58a3c91c FG |
885 | # copy snapshot config to current config |
886 | $conf = $class->__snapshot_apply_config($conf, $snap); | |
887 | $conf->{parent} = $snapname; | |
58a3c91c FG |
888 | } |
889 | ||
3fa4ce45 DC |
890 | $class->__snapshot_rollback_hook($vmid, $conf, $snap, $prepare, $data); |
891 | ||
58a3c91c FG |
892 | $class->write_config($vmid, $conf); |
893 | ||
894 | if (!$prepare && $snap->{vmstate}) { | |
3fa4ce45 | 895 | $class->__snapshot_rollback_vm_start($vmid, $snap->{vmstate}, $data); |
58a3c91c FG |
896 | } |
897 | }; | |
898 | ||
899 | $class->lock_config($vmid, $updatefn); | |
900 | ||
901 | $class->__snapshot_foreach_volume($snap, sub { | |
902 | my ($vs, $volume) = @_; | |
903 | ||
904 | $class->__snapshot_rollback_vol_rollback($volume, $snapname); | |
905 | }); | |
906 | ||
907 | $prepare = 0; | |
908 | $class->lock_config($vmid, $updatefn); | |
909 | } | |
910 | ||
eb50bb61 RV |
911 | # bash completion helper |
912 | ||
90fba9cd WB |
913 | sub snapshot_list { |
914 | my ($class, $vmid) = @_; | |
eb50bb61 | 915 | |
90fba9cd WB |
916 | my $snapshot = eval { |
917 | my $conf = $class->load_config($vmid); | |
918 | my $snapshots = $conf->{snapshots} || []; | |
919 | [ sort keys %$snapshots ] | |
920 | } || []; | |
eb50bb61 RV |
921 | |
922 | return $snapshot; | |
923 | } | |
924 | ||
58a3c91c | 925 | 1; |