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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
6c12b52e | 2 | |
b5efdb8a | 3 | #include "alloc-util.h" |
96aad8d1 | 4 | #include "bus-common-errors.h" |
40af3d02 | 5 | #include "bus-get-properties.h" |
4ac08d8a | 6 | #include "bus-util.h" |
1d22e906 LP |
7 | #include "dbus-cgroup.h" |
8 | #include "dbus-kill.h" | |
5fa09835 | 9 | #include "dbus-manager.h" |
1d22e906 | 10 | #include "dbus-scope.h" |
0fb0fffa | 11 | #include "dbus-util.h" |
836e4e7e DDM |
12 | #include "manager.h" |
13 | #include "pidref.h" | |
b5efdb8a LP |
14 | #include "scope.h" |
15 | #include "selinux-access.h" | |
836e4e7e | 16 | #include "string-util.h" |
b5efdb8a | 17 | #include "unit.h" |
6c12b52e | 18 | |
c20076a8 | 19 | int bus_scope_method_abandon(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
99534007 | 20 | Scope *s = ASSERT_PTR(userdata); |
4e2f8d27 | 21 | int r; |
a911bb9a | 22 | |
a911bb9a | 23 | assert(message); |
a911bb9a | 24 | |
1d22e906 LP |
25 | r = mac_selinux_unit_access_check(UNIT(s), message, "stop", error); |
26 | if (r < 0) | |
27 | return r; | |
28 | ||
29 | r = bus_verify_manage_units_async(UNIT(s)->manager, message, error); | |
283868e1 SW |
30 | if (r < 0) |
31 | return r; | |
32 | if (r == 0) | |
33 | return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ | |
34 | ||
4e2f8d27 | 35 | r = scope_abandon(s); |
4e2f8d27 LP |
36 | if (r == -ESTALE) |
37 | return sd_bus_error_setf(error, BUS_ERROR_SCOPE_NOT_RUNNING, "Scope %s is not running, cannot abandon.", UNIT(s)->id); | |
1d22e906 LP |
38 | if (r < 0) |
39 | return r; | |
4e2f8d27 LP |
40 | |
41 | return sd_bus_reply_method_return(message, NULL); | |
a911bb9a LP |
42 | } |
43 | ||
718db961 | 44 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, scope_result, ScopeResult); |
5fa09835 | 45 | static BUS_DEFINE_SET_TRANSIENT_PARSE(oom_policy, OOMPolicy, oom_policy_from_string); |
6c12b52e | 46 | |
718db961 LP |
47 | const sd_bus_vtable bus_scope_vtable[] = { |
48 | SD_BUS_VTABLE_START(0), | |
371c0b79 | 49 | SD_BUS_PROPERTY("Controller", "s", NULL, offsetof(Scope, controller), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
556089dc | 50 | SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Scope, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST), |
718db961 | 51 | SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Scope, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
9ed7de60 | 52 | SD_BUS_PROPERTY("RuntimeMaxUSec", "t", bus_property_get_usec, offsetof(Scope, runtime_max_usec), SD_BUS_VTABLE_PROPERTY_CONST), |
5918a933 | 53 | SD_BUS_PROPERTY("RuntimeRandomizedExtraUSec", "t", bus_property_get_usec, offsetof(Scope, runtime_rand_extra_usec), SD_BUS_VTABLE_PROPERTY_CONST), |
5fa09835 | 54 | SD_BUS_PROPERTY("OOMPolicy", "s", bus_property_get_oom_policy, offsetof(Scope, oom_policy), SD_BUS_VTABLE_PROPERTY_CONST), |
2d4a39e7 | 55 | SD_BUS_SIGNAL("RequestStop", NULL, 0), |
c20076a8 | 56 | SD_BUS_METHOD("Abandon", NULL, NULL, bus_scope_method_abandon, SD_BUS_VTABLE_UNPRIVILEGED), |
718db961 LP |
57 | SD_BUS_VTABLE_END |
58 | }; | |
6c12b52e | 59 | |
9f2e86af | 60 | static int bus_scope_set_transient_property( |
6c12b52e LP |
61 | Scope *s, |
62 | const char *name, | |
718db961 | 63 | sd_bus_message *message, |
2e59b241 | 64 | UnitWriteFlags flags, |
718db961 | 65 | sd_bus_error *error) { |
6c12b52e | 66 | |
ef71cc77 | 67 | Unit *u = UNIT(s); |
6c12b52e LP |
68 | int r; |
69 | ||
6c12b52e | 70 | assert(s); |
718db961 LP |
71 | assert(name); |
72 | assert(message); | |
6c12b52e | 73 | |
2e59b241 LP |
74 | flags |= UNIT_PRIVATE; |
75 | ||
0fb0fffa | 76 | if (streq(name, "TimeoutStopUSec")) |
ef71cc77 | 77 | return bus_set_transient_usec(u, name, &s->timeout_stop_usec, message, flags, error); |
0fb0fffa | 78 | |
9ed7de60 PW |
79 | if (streq(name, "RuntimeMaxUSec")) |
80 | return bus_set_transient_usec(u, name, &s->runtime_max_usec, message, flags, error); | |
81 | ||
5918a933 AB |
82 | if (streq(name, "RuntimeRandomizedExtraUSec")) |
83 | return bus_set_transient_usec(u, name, &s->runtime_rand_extra_usec, message, flags, error); | |
84 | ||
5fa09835 ML |
85 | if (streq(name, "OOMPolicy")) |
86 | return bus_set_transient_oom_policy(u, name, &s->oom_policy, message, flags, error); | |
87 | ||
6c12b52e | 88 | if (streq(name, "PIDs")) { |
4ac08d8a | 89 | _cleanup_(pidref_done) PidRef sender_pidref = PIDREF_NULL; |
294a90cc | 90 | unsigned n = 0; |
6c12b52e | 91 | |
718db961 LP |
92 | r = sd_bus_message_enter_container(message, 'a', "u"); |
93 | if (r < 0) | |
94 | return r; | |
6c12b52e | 95 | |
6592b975 | 96 | for (;;) { |
495e75ed | 97 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; |
6592b975 | 98 | uint32_t upid; |
4ac08d8a | 99 | PidRef *p; |
6592b975 LP |
100 | |
101 | r = sd_bus_message_read(message, "u", &upid); | |
102 | if (r < 0) | |
103 | return r; | |
104 | if (r == 0) | |
105 | break; | |
106 | ||
107 | if (upid == 0) { | |
4ac08d8a LP |
108 | if (!pidref_is_set(&sender_pidref)) { |
109 | r = bus_query_sender_pidref(message, &sender_pidref); | |
6592b975 LP |
110 | if (r < 0) |
111 | return r; | |
112 | } | |
113 | ||
4ac08d8a LP |
114 | p = &sender_pidref; |
115 | } else { | |
116 | r = pidref_set_pid(&pidref, upid); | |
6592b975 LP |
117 | if (r < 0) |
118 | return r; | |
6c12b52e | 119 | |
4ac08d8a LP |
120 | p = &pidref; |
121 | } | |
495e75ed | 122 | |
4ac08d8a | 123 | r = unit_pid_attachable(u, p, error); |
6592b975 LP |
124 | if (r < 0) |
125 | return r; | |
6c12b52e | 126 | |
2e59b241 | 127 | if (!UNIT_WRITE_FLAGS_NOOP(flags)) { |
4ac08d8a | 128 | r = unit_watch_pidref(u, p, /* exclusive= */ false); |
66f83537 | 129 | if (r < 0) |
adb3a45d LP |
130 | return r; |
131 | } | |
6c12b52e | 132 | |
adb3a45d | 133 | n++; |
6c12b52e | 134 | } |
718db961 LP |
135 | |
136 | r = sd_bus_message_exit_container(message); | |
137 | if (r < 0) | |
138 | return r; | |
6c12b52e | 139 | |
7595fed9 LP |
140 | return n <= 0 ? -EINVAL : 1; |
141 | } | |
6c12b52e | 142 | |
7595fed9 LP |
143 | if (streq(name, "PIDFDs")) { |
144 | unsigned n = 0; | |
145 | ||
146 | r = sd_bus_message_enter_container(message, 'a', "h"); | |
147 | if (r < 0) | |
148 | return r; | |
149 | ||
150 | for (;;) { | |
151 | _cleanup_(pidref_done) PidRef pidref = PIDREF_NULL; | |
152 | int fd; | |
153 | ||
154 | r = sd_bus_message_read(message, "h", &fd); | |
155 | if (r < 0) | |
156 | return r; | |
157 | if (r == 0) | |
158 | break; | |
159 | ||
160 | r = pidref_set_pidfd(&pidref, fd); | |
161 | if (r < 0) | |
162 | return r; | |
163 | ||
164 | r = unit_pid_attachable(u, &pidref, error); | |
165 | if (r < 0) | |
166 | return r; | |
167 | ||
168 | if (!UNIT_WRITE_FLAGS_NOOP(flags)) { | |
169 | r = unit_watch_pidref(u, &pidref, /* exclusive= */ false); | |
66f83537 | 170 | if (r < 0) |
7595fed9 LP |
171 | return r; |
172 | } | |
173 | ||
174 | n++; | |
175 | } | |
176 | ||
177 | r = sd_bus_message_exit_container(message); | |
178 | if (r < 0) | |
179 | return r; | |
180 | ||
181 | return n <= 0 ? -EINVAL : 1; | |
182 | } | |
cc23f9f1 | 183 | |
7595fed9 | 184 | if (streq(name, "Controller")) { |
2d4a39e7 | 185 | const char *controller; |
2d4a39e7 | 186 | |
f2c49c86 LP |
187 | /* We can't support direct connections with this, as direct connections know no service or unique name |
188 | * concept, but the Controller field stores exactly that. */ | |
ef71cc77 | 189 | if (sd_bus_message_get_bus(message) != u->manager->api_bus) |
1b09b81c | 190 | return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Sorry, Controller= logic only supported via the bus."); |
f2c49c86 | 191 | |
2d4a39e7 LP |
192 | r = sd_bus_message_read(message, "s", &controller); |
193 | if (r < 0) | |
194 | return r; | |
195 | ||
5453a4b1 | 196 | if (!isempty(controller) && !sd_bus_service_name_is_valid(controller)) |
2d4a39e7 LP |
197 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller); |
198 | ||
2e59b241 LP |
199 | if (!UNIT_WRITE_FLAGS_NOOP(flags)) { |
200 | r = free_and_strdup(&s->controller, empty_to_null(controller)); | |
201 | if (r < 0) | |
202 | return r; | |
2d4a39e7 LP |
203 | } |
204 | ||
cc23f9f1 | 205 | return 1; |
6c12b52e LP |
206 | } |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | int bus_scope_set_property( | |
212 | Unit *u, | |
213 | const char *name, | |
718db961 | 214 | sd_bus_message *message, |
2e59b241 | 215 | UnitWriteFlags flags, |
718db961 | 216 | sd_bus_error *error) { |
6c12b52e LP |
217 | |
218 | Scope *s = SCOPE(u); | |
219 | int r; | |
220 | ||
718db961 | 221 | assert(s); |
6c12b52e | 222 | assert(name); |
718db961 | 223 | assert(message); |
6c12b52e | 224 | |
2e59b241 | 225 | r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, flags, error); |
6c12b52e LP |
226 | if (r != 0) |
227 | return r; | |
228 | ||
229 | if (u->load_state == UNIT_STUB) { | |
230 | /* While we are created we still accept PIDs */ | |
231 | ||
2e59b241 | 232 | r = bus_scope_set_transient_property(s, name, message, flags, error); |
6c12b52e LP |
233 | if (r != 0) |
234 | return r; | |
a6c0353b | 235 | |
2e59b241 | 236 | r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, flags, error); |
a6c0353b LP |
237 | if (r != 0) |
238 | return r; | |
03860190 MS |
239 | |
240 | if (streq(name, "User")) | |
241 | return bus_set_transient_user_relaxed(u, name, &s->user, message, flags, error); | |
242 | ||
243 | if (streq(name, "Group")) | |
244 | return bus_set_transient_user_relaxed(u, name, &s->group, message, flags, error); | |
6c12b52e LP |
245 | } |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | int bus_scope_commit_properties(Unit *u) { | |
251 | assert(u); | |
252 | ||
8d178f70 | 253 | (void) unit_realize_cgroup(u); |
bc432dc7 | 254 | |
6c12b52e LP |
255 | return 0; |
256 | } | |
2d4a39e7 LP |
257 | |
258 | int bus_scope_send_request_stop(Scope *s) { | |
4afd3348 | 259 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d4a39e7 LP |
260 | _cleanup_free_ char *p = NULL; |
261 | int r; | |
262 | ||
263 | assert(s); | |
264 | ||
265 | if (!s->controller) | |
266 | return 0; | |
267 | ||
268 | p = unit_dbus_path(UNIT(s)); | |
269 | if (!p) | |
270 | return -ENOMEM; | |
271 | ||
272 | r = sd_bus_message_new_signal( | |
273 | UNIT(s)->manager->api_bus, | |
151b9b96 | 274 | &m, |
2d4a39e7 LP |
275 | p, |
276 | "org.freedesktop.systemd1.Scope", | |
151b9b96 | 277 | "RequestStop"); |
2d4a39e7 LP |
278 | if (r < 0) |
279 | return r; | |
280 | ||
f4b0fb23 | 281 | return sd_bus_send_to(UNIT(s)->manager->api_bus, m, s->controller, NULL); |
2d4a39e7 | 282 | } |
371c0b79 LP |
283 | |
284 | static int on_controller_gone(sd_bus_track *track, void *userdata) { | |
285 | Scope *s = userdata; | |
286 | ||
287 | assert(track); | |
288 | ||
289 | if (s->controller) { | |
290 | log_unit_debug(UNIT(s), "Controller %s disappeared from bus.", s->controller); | |
291 | unit_add_to_dbus_queue(UNIT(s)); | |
292 | s->controller = mfree(s->controller); | |
293 | } | |
294 | ||
295 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | int bus_scope_track_controller(Scope *s) { | |
301 | int r; | |
302 | ||
303 | assert(s); | |
304 | ||
305 | if (!s->controller || s->controller_track) | |
306 | return 0; | |
307 | ||
308 | r = sd_bus_track_new(UNIT(s)->manager->api_bus, &s->controller_track, on_controller_gone, s); | |
309 | if (r < 0) | |
310 | return r; | |
311 | ||
312 | r = sd_bus_track_add_name(s->controller_track, s->controller); | |
313 | if (r < 0) { | |
314 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
315 | return r; | |
316 | } | |
317 | ||
318 | return 0; | |
319 | } |