1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
|
/* SPDX-License-Identifier: LGPL-2.1+ */
#include "sd-bus.h"
#include "bus-error.h"
#include "bus-unit-util.h"
#include "bus-util.h"
#include "bus-wait-for-jobs.h"
#include "nspawn-register.h"
#include "special.h"
#include "stat-util.h"
#include "strv.h"
#include "util.h"
static int append_machine_properties(
sd_bus_message *m,
CustomMount *mounts,
unsigned n_mounts,
int kill_signal) {
unsigned j;
int r;
assert(m);
r = sd_bus_message_append(m, "(sv)", "DevicePolicy", "s", "closed");
if (r < 0)
return bus_log_create_error(r);
/* If you make changes here, also make sure to update systemd-nspawn@.service, to keep the device policies in
* sync regardless if we are run with or without the --keep-unit switch. */
r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 2,
/* Allow the container to
* access and create the API
* device nodes, so that
* PrivateDevices= in the
* container can work
* fine */
"/dev/net/tun", "rwm",
/* Allow the container
* access to ptys. However,
* do not permit the
* container to ever create
* these device nodes. */
"char-pts", "rw");
if (r < 0)
return bus_log_create_error(r);
for (j = 0; j < n_mounts; j++) {
CustomMount *cm = mounts + j;
if (cm->type != CUSTOM_MOUNT_BIND)
continue;
r = is_device_node(cm->source);
if (r == -ENOENT) {
/* The bind source might only appear as the image is put together, hence don't complain */
log_debug_errno(r, "Bind mount source %s not found, ignoring: %m", cm->source);
continue;
}
if (r < 0)
return log_error_errno(r, "Failed to stat %s: %m", cm->source);
if (r) {
r = sd_bus_message_append(m, "(sv)", "DeviceAllow", "a(ss)", 1,
cm->source, cm->read_only ? "r" : "rw");
if (r < 0)
return log_error_errno(r, "Failed to append message arguments: %m");
}
}
if (kill_signal != 0) {
r = sd_bus_message_append(m, "(sv)", "KillSignal", "i", kill_signal);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "(sv)", "KillMode", "s", "mixed");
if (r < 0)
return bus_log_create_error(r);
}
return 0;
}
static int append_controller_property(sd_bus *bus, sd_bus_message *m) {
const char *unique;
int r;
assert(bus);
assert(m);
r = sd_bus_get_unique_name(bus, &unique);
if (r < 0)
return log_error_errno(r, "Failed to get unique name: %m");
r = sd_bus_message_append(m, "(sv)", "Controller", "s", unique);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
int register_machine(
sd_bus *bus,
const char *machine_name,
pid_t pid,
const char *directory,
sd_id128_t uuid,
int local_ifindex,
const char *slice,
CustomMount *mounts,
unsigned n_mounts,
int kill_signal,
char **properties,
sd_bus_message *properties_message,
bool keep_unit,
const char *service) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(bus);
if (keep_unit) {
r = sd_bus_call_method(
bus,
"org.freedesktop.machine1",
"/org/freedesktop/machine1",
"org.freedesktop.machine1.Manager",
"RegisterMachineWithNetwork",
&error,
NULL,
"sayssusai",
machine_name,
SD_BUS_MESSAGE_APPEND_ID128(uuid),
service,
"container",
(uint32_t) pid,
strempty(directory),
local_ifindex > 0 ? 1 : 0, local_ifindex);
} else {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
r = sd_bus_message_new_method_call(
bus,
&m,
"org.freedesktop.machine1",
"/org/freedesktop/machine1",
"org.freedesktop.machine1.Manager",
"CreateMachineWithNetwork");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(
m,
"sayssusai",
machine_name,
SD_BUS_MESSAGE_APPEND_ID128(uuid),
service,
"container",
(uint32_t) pid,
strempty(directory),
local_ifindex > 0 ? 1 : 0, local_ifindex);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'a', "(sv)");
if (r < 0)
return bus_log_create_error(r);
if (!isempty(slice)) {
r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
if (r < 0)
return bus_log_create_error(r);
}
r = append_controller_property(bus, m);
if (r < 0)
return r;
r = append_machine_properties(
m,
mounts,
n_mounts,
kill_signal);
if (r < 0)
return r;
if (properties_message) {
r = sd_bus_message_copy(m, properties_message, true);
if (r < 0)
return bus_log_create_error(r);
}
r = bus_append_unit_property_assignment_many(m, UNIT_SERVICE, properties);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_call(bus, m, 0, &error, NULL);
}
if (r < 0)
return log_error_errno(r, "Failed to register machine: %s", bus_error_message(&error, r));
return 0;
}
int terminate_machine(
sd_bus *bus,
const char *machine_name) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(bus);
r = sd_bus_call_method(
bus,
"org.freedesktop.machine1",
"/org/freedesktop/machine1",
"org.freedesktop.machine1.Manager",
"TerminateMachine",
&error,
NULL,
"s",
machine_name);
if (r < 0)
log_debug("Failed to terminate machine: %s", bus_error_message(&error, r));
return 0;
}
int allocate_scope(
sd_bus *bus,
const char *machine_name,
pid_t pid,
const char *slice,
CustomMount *mounts,
unsigned n_mounts,
int kill_signal,
char **properties,
sd_bus_message *properties_message) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
_cleanup_free_ char *scope = NULL;
const char *description, *object;
int r;
assert(bus);
r = bus_wait_for_jobs_new(bus, &w);
if (r < 0)
return log_error_errno(r, "Could not watch job: %m");
r = unit_name_mangle_with_suffix(machine_name, 0, ".scope", &scope);
if (r < 0)
return log_error_errno(r, "Failed to mangle scope name: %m");
r = sd_bus_message_new_method_call(
bus,
&m,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"StartTransientUnit");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "ss", scope, "fail");
if (r < 0)
return bus_log_create_error(r);
/* Properties */
r = sd_bus_message_open_container(m, 'a', "(sv)");
if (r < 0)
return bus_log_create_error(r);
description = strjoina("Container ", machine_name);
r = sd_bus_message_append(m, "(sv)(sv)(sv)(sv)(sv)(sv)",
"PIDs", "au", 1, pid,
"Description", "s", description,
"Delegate", "b", 1,
"CollectMode", "s", "inactive-or-failed",
"AddRef", "b", 1,
"Slice", "s", isempty(slice) ? SPECIAL_MACHINE_SLICE : slice);
if (r < 0)
return bus_log_create_error(r);
r = append_controller_property(bus, m);
if (r < 0)
return r;
if (properties_message) {
r = sd_bus_message_copy(m, properties_message, true);
if (r < 0)
return bus_log_create_error(r);
}
r = append_machine_properties(
m,
mounts,
n_mounts,
kill_signal);
if (r < 0)
return r;
r = bus_append_unit_property_assignment_many(m, UNIT_SCOPE, properties);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
/* No auxiliary units */
r = sd_bus_message_append(
m,
"a(sa(sv))",
0);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_call(bus, m, 0, &error, &reply);
if (r < 0)
return log_error_errno(r, "Failed to allocate scope: %s", bus_error_message(&error, r));
r = sd_bus_message_read(reply, "o", &object);
if (r < 0)
return bus_log_parse_error(r);
r = bus_wait_for_jobs_one(w, object, false);
if (r < 0)
return r;
return 0;
}
int terminate_scope(
sd_bus *bus,
const char *machine_name) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_free_ char *scope = NULL;
int r;
r = unit_name_mangle_with_suffix(machine_name, 0, ".scope", &scope);
if (r < 0)
return log_error_errno(r, "Failed to mangle scope name: %m");
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"AbandonScope",
&error,
NULL,
"s",
scope);
if (r < 0) {
log_debug_errno(r, "Failed to abandon scope '%s', ignoring: %s", scope, bus_error_message(&error, r));
sd_bus_error_free(&error);
}
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"KillUnit",
&error,
NULL,
"ssi",
scope,
"all",
(int32_t) SIGKILL);
if (r < 0) {
log_debug_errno(r, "Failed to SIGKILL scope '%s', ignoring: %s", scope, bus_error_message(&error, r));
sd_bus_error_free(&error);
}
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"UnrefUnit",
&error,
NULL,
"s",
scope);
if (r < 0)
log_debug_errno(r, "Failed to drop reference to scope '%s', ignoring: %s", scope, bus_error_message(&error, r));
return 0;
}
|