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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
6c12b52e LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6c12b52e LP |
6 | ***/ |
7 | ||
b5efdb8a | 8 | #include "alloc-util.h" |
96aad8d1 | 9 | #include "bus-common-errors.h" |
b5efdb8a LP |
10 | #include "bus-internal.h" |
11 | #include "bus-util.h" | |
1d22e906 LP |
12 | #include "dbus-cgroup.h" |
13 | #include "dbus-kill.h" | |
14 | #include "dbus-scope.h" | |
b5efdb8a | 15 | #include "dbus-unit.h" |
0fb0fffa | 16 | #include "dbus-util.h" |
b5efdb8a LP |
17 | #include "dbus.h" |
18 | #include "scope.h" | |
19 | #include "selinux-access.h" | |
20 | #include "unit.h" | |
6c12b52e | 21 | |
19070062 | 22 | static int bus_scope_abandon(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
a911bb9a | 23 | Scope *s = userdata; |
4e2f8d27 | 24 | int r; |
a911bb9a | 25 | |
a911bb9a LP |
26 | assert(message); |
27 | assert(s); | |
28 | ||
1d22e906 LP |
29 | r = mac_selinux_unit_access_check(UNIT(s), message, "stop", error); |
30 | if (r < 0) | |
31 | return r; | |
32 | ||
33 | r = bus_verify_manage_units_async(UNIT(s)->manager, message, error); | |
283868e1 SW |
34 | if (r < 0) |
35 | return r; | |
36 | if (r == 0) | |
37 | return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ | |
38 | ||
4e2f8d27 | 39 | r = scope_abandon(s); |
4e2f8d27 LP |
40 | if (r == -ESTALE) |
41 | return sd_bus_error_setf(error, BUS_ERROR_SCOPE_NOT_RUNNING, "Scope %s is not running, cannot abandon.", UNIT(s)->id); | |
1d22e906 LP |
42 | if (r < 0) |
43 | return r; | |
4e2f8d27 LP |
44 | |
45 | return sd_bus_reply_method_return(message, NULL); | |
a911bb9a LP |
46 | } |
47 | ||
718db961 | 48 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, scope_result, ScopeResult); |
6c12b52e | 49 | |
718db961 LP |
50 | const sd_bus_vtable bus_scope_vtable[] = { |
51 | SD_BUS_VTABLE_START(0), | |
371c0b79 | 52 | SD_BUS_PROPERTY("Controller", "s", NULL, offsetof(Scope, controller), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
556089dc | 53 | SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Scope, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST), |
718db961 | 54 | SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Scope, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
2d4a39e7 | 55 | SD_BUS_SIGNAL("RequestStop", NULL, 0), |
1d22e906 | 56 | SD_BUS_METHOD("Abandon", NULL, NULL, bus_scope_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 LP |
66 | |
67 | int r; | |
68 | ||
6c12b52e | 69 | assert(s); |
718db961 LP |
70 | assert(name); |
71 | assert(message); | |
6c12b52e | 72 | |
2e59b241 LP |
73 | flags |= UNIT_PRIVATE; |
74 | ||
0fb0fffa YW |
75 | if (streq(name, "TimeoutStopUSec")) |
76 | return bus_set_transient_usec(UNIT(s), name, &s->timeout_stop_usec, message, flags, error); | |
77 | ||
6c12b52e | 78 | if (streq(name, "PIDs")) { |
6592b975 | 79 | _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; |
294a90cc | 80 | unsigned n = 0; |
6c12b52e | 81 | |
718db961 LP |
82 | r = sd_bus_message_enter_container(message, 'a', "u"); |
83 | if (r < 0) | |
84 | return r; | |
6c12b52e | 85 | |
6592b975 LP |
86 | for (;;) { |
87 | uint32_t upid; | |
88 | pid_t pid; | |
89 | ||
90 | r = sd_bus_message_read(message, "u", &upid); | |
91 | if (r < 0) | |
92 | return r; | |
93 | if (r == 0) | |
94 | break; | |
95 | ||
96 | if (upid == 0) { | |
97 | if (!creds) { | |
98 | r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); | |
99 | if (r < 0) | |
100 | return r; | |
101 | } | |
102 | ||
103 | r = sd_bus_creds_get_pid(creds, &pid); | |
104 | if (r < 0) | |
105 | return r; | |
106 | } else | |
107 | pid = (uid_t) upid; | |
6c12b52e | 108 | |
6592b975 LP |
109 | r = unit_pid_attachable(UNIT(s), pid, error); |
110 | if (r < 0) | |
111 | return r; | |
6c12b52e | 112 | |
2e59b241 | 113 | if (!UNIT_WRITE_FLAGS_NOOP(flags)) { |
a911bb9a | 114 | r = unit_watch_pid(UNIT(s), pid); |
adb3a45d LP |
115 | if (r < 0 && r != -EEXIST) |
116 | return r; | |
117 | } | |
6c12b52e | 118 | |
adb3a45d | 119 | n++; |
6c12b52e | 120 | } |
718db961 LP |
121 | |
122 | r = sd_bus_message_exit_container(message); | |
123 | if (r < 0) | |
124 | return r; | |
6c12b52e | 125 | |
adb3a45d | 126 | if (n <= 0) |
6c12b52e LP |
127 | return -EINVAL; |
128 | ||
129 | return 1; | |
cc23f9f1 | 130 | |
2d4a39e7 LP |
131 | } else if (streq(name, "Controller")) { |
132 | const char *controller; | |
2d4a39e7 | 133 | |
f2c49c86 LP |
134 | /* We can't support direct connections with this, as direct connections know no service or unique name |
135 | * concept, but the Controller field stores exactly that. */ | |
136 | if (sd_bus_message_get_bus(message) != UNIT(s)->manager->api_bus) | |
137 | return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Sorry, Controller= logic only supported via the bus."); | |
138 | ||
2d4a39e7 LP |
139 | r = sd_bus_message_read(message, "s", &controller); |
140 | if (r < 0) | |
141 | return r; | |
142 | ||
143 | if (!isempty(controller) && !service_name_is_valid(controller)) | |
144 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller); | |
145 | ||
2e59b241 LP |
146 | if (!UNIT_WRITE_FLAGS_NOOP(flags)) { |
147 | r = free_and_strdup(&s->controller, empty_to_null(controller)); | |
148 | if (r < 0) | |
149 | return r; | |
2d4a39e7 LP |
150 | } |
151 | ||
cc23f9f1 | 152 | return 1; |
6c12b52e LP |
153 | } |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | int bus_scope_set_property( | |
159 | Unit *u, | |
160 | const char *name, | |
718db961 | 161 | sd_bus_message *message, |
2e59b241 | 162 | UnitWriteFlags flags, |
718db961 | 163 | sd_bus_error *error) { |
6c12b52e LP |
164 | |
165 | Scope *s = SCOPE(u); | |
166 | int r; | |
167 | ||
718db961 | 168 | assert(s); |
6c12b52e | 169 | assert(name); |
718db961 | 170 | assert(message); |
6c12b52e | 171 | |
2e59b241 | 172 | r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, flags, error); |
6c12b52e LP |
173 | if (r != 0) |
174 | return r; | |
175 | ||
176 | if (u->load_state == UNIT_STUB) { | |
177 | /* While we are created we still accept PIDs */ | |
178 | ||
2e59b241 | 179 | r = bus_scope_set_transient_property(s, name, message, flags, error); |
6c12b52e LP |
180 | if (r != 0) |
181 | return r; | |
a6c0353b | 182 | |
2e59b241 | 183 | r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, flags, error); |
a6c0353b LP |
184 | if (r != 0) |
185 | return r; | |
6c12b52e LP |
186 | } |
187 | ||
188 | return 0; | |
189 | } | |
190 | ||
191 | int bus_scope_commit_properties(Unit *u) { | |
192 | assert(u); | |
193 | ||
bc432dc7 | 194 | unit_update_cgroup_members_masks(u); |
6c12b52e | 195 | unit_realize_cgroup(u); |
bc432dc7 | 196 | |
6c12b52e LP |
197 | return 0; |
198 | } | |
2d4a39e7 LP |
199 | |
200 | int bus_scope_send_request_stop(Scope *s) { | |
4afd3348 | 201 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d4a39e7 LP |
202 | _cleanup_free_ char *p = NULL; |
203 | int r; | |
204 | ||
205 | assert(s); | |
206 | ||
207 | if (!s->controller) | |
208 | return 0; | |
209 | ||
210 | p = unit_dbus_path(UNIT(s)); | |
211 | if (!p) | |
212 | return -ENOMEM; | |
213 | ||
214 | r = sd_bus_message_new_signal( | |
215 | UNIT(s)->manager->api_bus, | |
151b9b96 | 216 | &m, |
2d4a39e7 LP |
217 | p, |
218 | "org.freedesktop.systemd1.Scope", | |
151b9b96 | 219 | "RequestStop"); |
2d4a39e7 LP |
220 | if (r < 0) |
221 | return r; | |
222 | ||
f4b0fb23 | 223 | return sd_bus_send_to(UNIT(s)->manager->api_bus, m, s->controller, NULL); |
2d4a39e7 | 224 | } |
371c0b79 LP |
225 | |
226 | static int on_controller_gone(sd_bus_track *track, void *userdata) { | |
227 | Scope *s = userdata; | |
228 | ||
229 | assert(track); | |
230 | ||
231 | if (s->controller) { | |
232 | log_unit_debug(UNIT(s), "Controller %s disappeared from bus.", s->controller); | |
233 | unit_add_to_dbus_queue(UNIT(s)); | |
234 | s->controller = mfree(s->controller); | |
235 | } | |
236 | ||
237 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | int bus_scope_track_controller(Scope *s) { | |
243 | int r; | |
244 | ||
245 | assert(s); | |
246 | ||
247 | if (!s->controller || s->controller_track) | |
248 | return 0; | |
249 | ||
250 | r = sd_bus_track_new(UNIT(s)->manager->api_bus, &s->controller_track, on_controller_gone, s); | |
251 | if (r < 0) | |
252 | return r; | |
253 | ||
254 | r = sd_bus_track_add_name(s->controller_track, s->controller); | |
255 | if (r < 0) { | |
256 | s->controller_track = sd_bus_track_unref(s->controller_track); | |
257 | return r; | |
258 | } | |
259 | ||
260 | return 0; | |
261 | } |