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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include "alloc-util.h" | |
23 | #include "bus-common-errors.h" | |
24 | #include "bus-internal.h" | |
25 | #include "bus-util.h" | |
26 | #include "dbus-cgroup.h" | |
27 | #include "dbus-kill.h" | |
28 | #include "dbus-scope.h" | |
29 | #include "dbus-unit.h" | |
30 | #include "dbus.h" | |
31 | #include "scope.h" | |
32 | #include "selinux-access.h" | |
33 | #include "unit.h" | |
34 | ||
35 | static int bus_scope_abandon(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
36 | Scope *s = userdata; | |
37 | int r; | |
38 | ||
39 | assert(message); | |
40 | assert(s); | |
41 | ||
42 | r = mac_selinux_unit_access_check(UNIT(s), message, "stop", error); | |
43 | if (r < 0) | |
44 | return r; | |
45 | ||
46 | r = bus_verify_manage_units_async(UNIT(s)->manager, message, error); | |
47 | if (r < 0) | |
48 | return r; | |
49 | if (r == 0) | |
50 | return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ | |
51 | ||
52 | r = scope_abandon(s); | |
53 | if (r == -ESTALE) | |
54 | return sd_bus_error_setf(error, BUS_ERROR_SCOPE_NOT_RUNNING, "Scope %s is not running, cannot abandon.", UNIT(s)->id); | |
55 | if (r < 0) | |
56 | return r; | |
57 | ||
58 | return sd_bus_reply_method_return(message, NULL); | |
59 | } | |
60 | ||
61 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, scope_result, ScopeResult); | |
62 | ||
63 | const sd_bus_vtable bus_scope_vtable[] = { | |
64 | SD_BUS_VTABLE_START(0), | |
65 | SD_BUS_PROPERTY("Controller", "s", NULL, offsetof(Scope, controller), SD_BUS_VTABLE_PROPERTY_CONST), | |
66 | SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Scope, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST), | |
67 | SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Scope, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), | |
68 | SD_BUS_SIGNAL("RequestStop", NULL, 0), | |
69 | SD_BUS_METHOD("Abandon", NULL, NULL, bus_scope_abandon, SD_BUS_VTABLE_UNPRIVILEGED), | |
70 | SD_BUS_VTABLE_END | |
71 | }; | |
72 | ||
73 | static int bus_scope_set_transient_property( | |
74 | Scope *s, | |
75 | const char *name, | |
76 | sd_bus_message *message, | |
77 | UnitSetPropertiesMode mode, | |
78 | sd_bus_error *error) { | |
79 | ||
80 | int r; | |
81 | ||
82 | assert(s); | |
83 | assert(name); | |
84 | assert(message); | |
85 | ||
86 | if (streq(name, "PIDs")) { | |
87 | unsigned n = 0; | |
88 | uint32_t pid; | |
89 | ||
90 | r = sd_bus_message_enter_container(message, 'a', "u"); | |
91 | if (r < 0) | |
92 | return r; | |
93 | ||
94 | while ((r = sd_bus_message_read(message, "u", &pid)) > 0) { | |
95 | ||
96 | if (pid <= 1) | |
97 | return -EINVAL; | |
98 | ||
99 | if (mode != UNIT_CHECK) { | |
100 | r = unit_watch_pid(UNIT(s), pid); | |
101 | if (r < 0 && r != -EEXIST) | |
102 | return r; | |
103 | } | |
104 | ||
105 | n++; | |
106 | } | |
107 | if (r < 0) | |
108 | return r; | |
109 | ||
110 | r = sd_bus_message_exit_container(message); | |
111 | if (r < 0) | |
112 | return r; | |
113 | ||
114 | if (n <= 0) | |
115 | return -EINVAL; | |
116 | ||
117 | return 1; | |
118 | ||
119 | } else if (streq(name, "Controller")) { | |
120 | const char *controller; | |
121 | char *c; | |
122 | ||
123 | r = sd_bus_message_read(message, "s", &controller); | |
124 | if (r < 0) | |
125 | return r; | |
126 | ||
127 | if (!isempty(controller) && !service_name_is_valid(controller)) | |
128 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller); | |
129 | ||
130 | if (mode != UNIT_CHECK) { | |
131 | if (isempty(controller)) | |
132 | c = NULL; | |
133 | else { | |
134 | c = strdup(controller); | |
135 | if (!c) | |
136 | return -ENOMEM; | |
137 | } | |
138 | ||
139 | free(s->controller); | |
140 | s->controller = c; | |
141 | } | |
142 | ||
143 | return 1; | |
144 | ||
145 | } else if (streq(name, "TimeoutStopUSec")) { | |
146 | ||
147 | if (mode != UNIT_CHECK) { | |
148 | r = sd_bus_message_read(message, "t", &s->timeout_stop_usec); | |
149 | if (r < 0) | |
150 | return r; | |
151 | ||
152 | unit_write_drop_in_format(UNIT(s), mode, name, "[Scope]\nTimeoutStopSec="USEC_FMT"us\n", s->timeout_stop_usec); | |
153 | } else { | |
154 | r = sd_bus_message_skip(message, "t"); | |
155 | if (r < 0) | |
156 | return r; | |
157 | } | |
158 | ||
159 | return 1; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | int bus_scope_set_property( | |
166 | Unit *u, | |
167 | const char *name, | |
168 | sd_bus_message *message, | |
169 | UnitSetPropertiesMode mode, | |
170 | sd_bus_error *error) { | |
171 | ||
172 | Scope *s = SCOPE(u); | |
173 | int r; | |
174 | ||
175 | assert(s); | |
176 | assert(name); | |
177 | assert(message); | |
178 | ||
179 | r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, mode, error); | |
180 | if (r != 0) | |
181 | return r; | |
182 | ||
183 | if (u->load_state == UNIT_STUB) { | |
184 | /* While we are created we still accept PIDs */ | |
185 | ||
186 | r = bus_scope_set_transient_property(s, name, message, mode, error); | |
187 | if (r != 0) | |
188 | return r; | |
189 | ||
190 | r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, mode, error); | |
191 | if (r != 0) | |
192 | return r; | |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | int bus_scope_commit_properties(Unit *u) { | |
199 | assert(u); | |
200 | ||
201 | unit_update_cgroup_members_masks(u); | |
202 | unit_realize_cgroup(u); | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | int bus_scope_send_request_stop(Scope *s) { | |
208 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
209 | _cleanup_free_ char *p = NULL; | |
210 | int r; | |
211 | ||
212 | assert(s); | |
213 | ||
214 | if (!s->controller) | |
215 | return 0; | |
216 | ||
217 | p = unit_dbus_path(UNIT(s)); | |
218 | if (!p) | |
219 | return -ENOMEM; | |
220 | ||
221 | r = sd_bus_message_new_signal( | |
222 | UNIT(s)->manager->api_bus, | |
223 | &m, | |
224 | p, | |
225 | "org.freedesktop.systemd1.Scope", | |
226 | "RequestStop"); | |
227 | if (r < 0) | |
228 | return r; | |
229 | ||
230 | return sd_bus_send_to(UNIT(s)->manager->api_bus, m, /* s->controller */ NULL, NULL); | |
231 | } |