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