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03467c88 | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
60918275 | 2 | |
c2f1db8f | 3 | #pragma once |
60918275 | 4 | |
a7334b09 LP |
5 | /*** |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
13 | (at your option) any later version. |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 18 | Lesser General Public License for more details. |
a7334b09 | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | ***/ | |
23 | ||
60918275 LP |
24 | #include <stdbool.h> |
25 | #include <inttypes.h> | |
348e27fe | 26 | #include <errno.h> |
60918275 LP |
27 | |
28 | typedef struct Job Job; | |
e5b5ae50 | 29 | typedef struct JobDependency JobDependency; |
97e6a119 | 30 | typedef struct JobBusClient JobBusClient; |
60918275 | 31 | typedef enum JobType JobType; |
e5b5ae50 | 32 | typedef enum JobState JobState; |
5cb5a6ff | 33 | typedef enum JobMode JobMode; |
5d44db4a | 34 | typedef enum JobResult JobResult; |
60918275 | 35 | |
348e27fe | 36 | /* Be careful when changing the job types! Adjust job_merging_table[] accordingly! */ |
60918275 | 37 | enum JobType { |
87f0e418 | 38 | JOB_START, /* if a unit does not support being started, we'll just wait until it becomes active */ |
5cb5a6ff LP |
39 | JOB_VERIFY_ACTIVE, |
40 | ||
60918275 | 41 | JOB_STOP, |
5cb5a6ff | 42 | |
e0209d83 | 43 | JOB_RELOAD, /* if running, reload */ |
5cb5a6ff LP |
44 | |
45 | /* Note that restarts are first treated like JOB_STOP, but | |
46 | * then instead of finishing are patched to become | |
47 | * JOB_START. */ | |
e0209d83 MS |
48 | JOB_RESTART, /* If running, stop. Then start unconditionally. */ |
49 | ||
50 | _JOB_TYPE_MAX_MERGING, | |
51 | ||
52 | /* JOB_NOP can enter into a transaction, but as it won't pull in | |
53 | * any dependencies, it won't have to merge with anything. | |
54 | * job_install() avoids the problem of merging JOB_NOP too (it's | |
55 | * special-cased, only merges with other JOB_NOPs). */ | |
56 | JOB_NOP = _JOB_TYPE_MAX_MERGING, /* do nothing */ | |
57 | ||
58 | _JOB_TYPE_MAX_IN_TRANSACTION, | |
59 | ||
60 | /* JOB_TRY_RESTART can never appear in a transaction, because | |
61 | * it always collapses into JOB_RESTART or JOB_NOP before entering. | |
62 | * Thus we never need to merge it with anything. */ | |
63 | JOB_TRY_RESTART = _JOB_TYPE_MAX_IN_TRANSACTION, /* if running, stop and then start */ | |
64 | ||
65 | /* JOB_RELOAD_OR_START won't enter into a transaction and cannot result | |
66 | * from transaction merging (there's no way for JOB_RELOAD and | |
67 | * JOB_START to meet in one transaction). It can result from a merge | |
68 | * during job installation, but then it will immediately collapse into | |
69 | * one of the two simpler types. */ | |
70 | JOB_RELOAD_OR_START, /* if running, reload, otherwise start */ | |
5cb5a6ff | 71 | |
e5b5ae50 LP |
72 | _JOB_TYPE_MAX, |
73 | _JOB_TYPE_INVALID = -1 | |
60918275 LP |
74 | }; |
75 | ||
e5b5ae50 | 76 | enum JobState { |
60918275 LP |
77 | JOB_WAITING, |
78 | JOB_RUNNING, | |
94f04347 LP |
79 | _JOB_STATE_MAX, |
80 | _JOB_STATE_INVALID = -1 | |
e5b5ae50 | 81 | }; |
60918275 LP |
82 | |
83 | enum JobMode { | |
cebe0d41 LP |
84 | JOB_FAIL, /* Fail if a conflicting job is already queued */ |
85 | JOB_REPLACE, /* Replace an existing conflicting job */ | |
23ade460 | 86 | JOB_REPLACE_IRREVERSIBLY, /* Like JOB_REPLACE + produce irreversible jobs */ |
cebe0d41 LP |
87 | JOB_ISOLATE, /* Start a unit, and stop all others */ |
88 | JOB_IGNORE_DEPENDENCIES, /* Ignore both requirement and ordering dependencies */ | |
89 | JOB_IGNORE_REQUIREMENTS, /* Ignore requirement dependencies */ | |
b548631a LP |
90 | _JOB_MODE_MAX, |
91 | _JOB_MODE_INVALID = -1 | |
60918275 LP |
92 | }; |
93 | ||
5d44db4a | 94 | enum JobResult { |
65eb544e MS |
95 | JOB_DONE, /* Job completed successfully */ |
96 | JOB_CANCELED, /* Job canceled by a conflicting job installation or by explicit cancel request */ | |
97 | JOB_TIMEOUT, /* JobTimeout elapsed */ | |
98 | JOB_FAILED, /* Job failed */ | |
99 | JOB_DEPENDENCY, /* A required dependency job did not result in JOB_DONE */ | |
100 | JOB_SKIPPED, /* JOB_RELOAD of inactive unit; negative result of JOB_VERIFY_ACTIVE */ | |
5d44db4a LP |
101 | _JOB_RESULT_MAX, |
102 | _JOB_RESULT_INVALID = -1 | |
103 | }; | |
104 | ||
c6918296 MS |
105 | #include "manager.h" |
106 | #include "unit.h" | |
107 | #include "hashmap.h" | |
108 | #include "list.h" | |
109 | ||
e5b5ae50 LP |
110 | struct JobDependency { |
111 | /* Encodes that the 'subject' job needs the 'object' job in | |
112 | * some way. This structure is used only while building a transaction. */ | |
113 | Job *subject; | |
114 | Job *object; | |
115 | ||
034c6ed7 LP |
116 | LIST_FIELDS(JobDependency, subject); |
117 | LIST_FIELDS(JobDependency, object); | |
9d58f1db LP |
118 | |
119 | bool matters; | |
69dd2852 | 120 | bool conflicts; |
e5b5ae50 LP |
121 | }; |
122 | ||
97e6a119 MS |
123 | struct JobBusClient { |
124 | LIST_FIELDS(JobBusClient, client); | |
125 | /* Note that this bus object is not ref counted here. */ | |
126 | DBusConnection *bus; | |
127 | char name[0]; | |
128 | }; | |
129 | ||
60918275 LP |
130 | struct Job { |
131 | Manager *manager; | |
87f0e418 | 132 | Unit *unit; |
e5b5ae50 | 133 | |
034c6ed7 LP |
134 | LIST_FIELDS(Job, transaction); |
135 | LIST_FIELDS(Job, run_queue); | |
c1e1601e | 136 | LIST_FIELDS(Job, dbus_queue); |
e5b5ae50 | 137 | |
44d8db9e LP |
138 | LIST_HEAD(JobDependency, subject_list); |
139 | LIST_HEAD(JobDependency, object_list); | |
e5b5ae50 | 140 | |
5cb5a6ff | 141 | /* Used for graph algs as a "I have been here" marker */ |
e5b5ae50 LP |
142 | Job* marker; |
143 | unsigned generation; | |
034c6ed7 | 144 | |
9d58f1db LP |
145 | uint32_t id; |
146 | ||
147 | JobType type; | |
148 | JobState state; | |
149 | ||
faf919f1 LP |
150 | Watch timer_watch; |
151 | ||
97e6a119 MS |
152 | /* There can be more than one client, because of job merging. */ |
153 | LIST_HEAD(JobBusClient, bus_client_list); | |
a567261a | 154 | |
5d44db4a LP |
155 | JobResult result; |
156 | ||
9d58f1db LP |
157 | bool installed:1; |
158 | bool in_run_queue:1; | |
159 | bool matters_to_anchor:1; | |
160 | bool override:1; | |
161 | bool in_dbus_queue:1; | |
162 | bool sent_dbus_new_signal:1; | |
cebe0d41 | 163 | bool ignore_order:1; |
39a18c60 | 164 | bool forgot_bus_clients:1; |
23ade460 | 165 | bool irreversible:1; |
60918275 LP |
166 | }; |
167 | ||
97e6a119 MS |
168 | JobBusClient* job_bus_client_new(DBusConnection *connection, const char *name); |
169 | ||
668ad332 | 170 | Job* job_new(Unit *unit, JobType type); |
39a18c60 | 171 | Job* job_new_raw(Unit *unit); |
60918275 | 172 | void job_free(Job *job); |
656bbffc | 173 | Job* job_install(Job *j); |
e0209d83 | 174 | int job_install_deserialized(Job *j); |
05d576f1 | 175 | void job_uninstall(Job *j); |
ceed3570 | 176 | void job_dump(Job *j, FILE*f, const char *prefix); |
39a18c60 MS |
177 | int job_serialize(Job *j, FILE *f, FDSet *fds); |
178 | int job_deserialize(Job *j, FILE *f, FDSet *fds); | |
179 | int job_coldplug(Job *j); | |
60918275 | 180 | |
1da4264f MS |
181 | JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts); |
182 | void job_dependency_free(JobDependency *l); | |
e5b5ae50 | 183 | |
e5b5ae50 LP |
184 | int job_merge(Job *j, Job *other); |
185 | ||
348e27fe MS |
186 | JobType job_type_lookup_merge(JobType a, JobType b); |
187 | ||
348e27fe MS |
188 | static inline bool job_type_is_mergeable(JobType a, JobType b) { |
189 | return job_type_lookup_merge(a, b) >= 0; | |
190 | } | |
191 | ||
192 | static inline bool job_type_is_conflicting(JobType a, JobType b) { | |
193 | return !job_type_is_mergeable(a, b); | |
194 | } | |
195 | ||
196 | static inline bool job_type_is_superset(JobType a, JobType b) { | |
197 | /* Checks whether operation a is a "superset" of b in its actions */ | |
198 | return a == job_type_lookup_merge(a, b); | |
199 | } | |
200 | ||
593fbdd2 | 201 | bool job_type_is_redundant(JobType a, UnitActiveState b); |
5cb5a6ff | 202 | |
e0209d83 MS |
203 | /* Collapses a state-dependent job type into a simpler type by observing |
204 | * the state of the unit which it is going to be applied to. */ | |
205 | void job_type_collapse(JobType *t, Unit *u); | |
206 | ||
207 | int job_type_merge_and_collapse(JobType *a, JobType b, Unit *u); | |
208 | ||
47be870b LP |
209 | bool job_is_runnable(Job *j); |
210 | ||
c1e1601e LP |
211 | void job_add_to_run_queue(Job *j); |
212 | void job_add_to_dbus_queue(Job *j); | |
213 | ||
faf919f1 LP |
214 | int job_start_timer(Job *j); |
215 | void job_timer_event(Job *j, uint64_t n_elapsed, Watch *w); | |
216 | ||
5cb5a6ff | 217 | int job_run_and_invalidate(Job *j); |
5273510e | 218 | int job_finish_and_invalidate(Job *j, JobResult result, bool recursive); |
1ffba6fe | 219 | |
faf919f1 LP |
220 | char *job_dbus_path(Job *j); |
221 | ||
c65eb836 LP |
222 | void job_shutdown_magic(Job *j); |
223 | ||
94f04347 LP |
224 | const char* job_type_to_string(JobType t); |
225 | JobType job_type_from_string(const char *s); | |
226 | ||
227 | const char* job_state_to_string(JobState t); | |
228 | JobState job_state_from_string(const char *s); | |
229 | ||
b548631a LP |
230 | const char* job_mode_to_string(JobMode t); |
231 | JobMode job_mode_from_string(const char *s); | |
232 | ||
5d44db4a LP |
233 | const char* job_result_to_string(JobResult t); |
234 | JobResult job_result_from_string(const char *s); |