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03467c88 | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
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2 | |
3 | #ifndef foojobhfoo | |
4 | #define foojobhfoo | |
5 | ||
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6 | /*** |
7 | This file is part of systemd. | |
8 | ||
9 | Copyright 2010 Lennart Poettering | |
10 | ||
11 | systemd is free software; you can redistribute it and/or modify it | |
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12 | under the terms of the GNU Lesser General Public License as published by |
13 | the Free Software Foundation; either version 2.1 of the License, or | |
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14 | (at your option) any later version. |
15 | ||
16 | systemd is distributed in the hope that it will be useful, but | |
17 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 19 | Lesser General Public License for more details. |
a7334b09 | 20 | |
5430f7f2 | 21 | You should have received a copy of the GNU Lesser General Public License |
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22 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
23 | ***/ | |
24 | ||
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25 | #include <stdbool.h> |
26 | #include <inttypes.h> | |
348e27fe | 27 | #include <errno.h> |
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28 | |
29 | typedef struct Job Job; | |
e5b5ae50 | 30 | typedef struct JobDependency JobDependency; |
60918275 | 31 | typedef enum JobType JobType; |
e5b5ae50 | 32 | typedef enum JobState JobState; |
5cb5a6ff | 33 | typedef enum JobMode JobMode; |
5d44db4a | 34 | typedef enum JobResult JobResult; |
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35 | |
36 | #include "manager.h" | |
87f0e418 | 37 | #include "unit.h" |
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38 | #include "hashmap.h" |
39 | #include "list.h" | |
40 | ||
348e27fe | 41 | /* Be careful when changing the job types! Adjust job_merging_table[] accordingly! */ |
60918275 | 42 | enum JobType { |
87f0e418 | 43 | JOB_START, /* if a unit does not support being started, we'll just wait until it becomes active */ |
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44 | JOB_VERIFY_ACTIVE, |
45 | ||
60918275 | 46 | JOB_STOP, |
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47 | |
48 | JOB_RELOAD, /* if running reload */ | |
49 | JOB_RELOAD_OR_START, /* if running reload, if not running start */ | |
50 | ||
51 | /* Note that restarts are first treated like JOB_STOP, but | |
52 | * then instead of finishing are patched to become | |
53 | * JOB_START. */ | |
54 | JOB_RESTART, /* if running stop, then start unconditionally */ | |
55 | JOB_TRY_RESTART, /* if running stop and then start */ | |
56 | ||
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57 | _JOB_TYPE_MAX, |
58 | _JOB_TYPE_INVALID = -1 | |
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59 | }; |
60 | ||
e5b5ae50 | 61 | enum JobState { |
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62 | JOB_WAITING, |
63 | JOB_RUNNING, | |
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64 | _JOB_STATE_MAX, |
65 | _JOB_STATE_INVALID = -1 | |
e5b5ae50 | 66 | }; |
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67 | |
68 | enum JobMode { | |
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69 | JOB_FAIL, /* Fail if a conflicting job is already queued */ |
70 | JOB_REPLACE, /* Replace an existing conflicting job */ | |
71 | JOB_ISOLATE, /* Start a unit, and stop all others */ | |
72 | JOB_IGNORE_DEPENDENCIES, /* Ignore both requirement and ordering dependencies */ | |
73 | JOB_IGNORE_REQUIREMENTS, /* Ignore requirement dependencies */ | |
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74 | _JOB_MODE_MAX, |
75 | _JOB_MODE_INVALID = -1 | |
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76 | }; |
77 | ||
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78 | enum JobResult { |
79 | JOB_DONE, | |
80 | JOB_CANCELED, | |
81 | JOB_TIMEOUT, | |
82 | JOB_FAILED, | |
83 | JOB_DEPENDENCY, | |
d68201e9 | 84 | JOB_SKIPPED, |
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85 | _JOB_RESULT_MAX, |
86 | _JOB_RESULT_INVALID = -1 | |
87 | }; | |
88 | ||
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89 | struct JobDependency { |
90 | /* Encodes that the 'subject' job needs the 'object' job in | |
91 | * some way. This structure is used only while building a transaction. */ | |
92 | Job *subject; | |
93 | Job *object; | |
94 | ||
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95 | LIST_FIELDS(JobDependency, subject); |
96 | LIST_FIELDS(JobDependency, object); | |
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97 | |
98 | bool matters; | |
69dd2852 | 99 | bool conflicts; |
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100 | }; |
101 | ||
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102 | struct Job { |
103 | Manager *manager; | |
87f0e418 | 104 | Unit *unit; |
e5b5ae50 | 105 | |
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106 | LIST_FIELDS(Job, transaction); |
107 | LIST_FIELDS(Job, run_queue); | |
c1e1601e | 108 | LIST_FIELDS(Job, dbus_queue); |
e5b5ae50 | 109 | |
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110 | LIST_HEAD(JobDependency, subject_list); |
111 | LIST_HEAD(JobDependency, object_list); | |
e5b5ae50 | 112 | |
5cb5a6ff | 113 | /* Used for graph algs as a "I have been here" marker */ |
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114 | Job* marker; |
115 | unsigned generation; | |
034c6ed7 | 116 | |
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117 | uint32_t id; |
118 | ||
119 | JobType type; | |
120 | JobState state; | |
121 | ||
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122 | Watch timer_watch; |
123 | ||
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124 | /* Note that this bus object is not ref counted here. */ |
125 | DBusConnection *bus; | |
126 | char *bus_client; | |
127 | ||
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128 | JobResult result; |
129 | ||
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130 | bool installed:1; |
131 | bool in_run_queue:1; | |
132 | bool matters_to_anchor:1; | |
133 | bool override:1; | |
134 | bool in_dbus_queue:1; | |
135 | bool sent_dbus_new_signal:1; | |
cebe0d41 | 136 | bool ignore_order:1; |
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137 | }; |
138 | ||
87f0e418 | 139 | Job* job_new(Manager *m, JobType type, Unit *unit); |
60918275 | 140 | void job_free(Job *job); |
ceed3570 | 141 | void job_dump(Job *j, FILE*f, const char *prefix); |
60918275 | 142 | |
69dd2852 | 143 | JobDependency* job_dependency_new(Job *subject, Job *object, bool matters, bool conflicts); |
e5b5ae50 | 144 | void job_dependency_free(JobDependency *l); |
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145 | |
146 | bool job_is_anchor(Job *j); | |
147 | ||
148 | int job_merge(Job *j, Job *other); | |
149 | ||
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150 | JobType job_type_lookup_merge(JobType a, JobType b); |
151 | ||
152 | static inline int job_type_merge(JobType *a, JobType b) { | |
153 | JobType t = job_type_lookup_merge(*a, b); | |
154 | if (t < 0) | |
155 | return -EEXIST; | |
156 | *a = t; | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static inline bool job_type_is_mergeable(JobType a, JobType b) { | |
161 | return job_type_lookup_merge(a, b) >= 0; | |
162 | } | |
163 | ||
164 | static inline bool job_type_is_conflicting(JobType a, JobType b) { | |
165 | return !job_type_is_mergeable(a, b); | |
166 | } | |
167 | ||
168 | static inline bool job_type_is_superset(JobType a, JobType b) { | |
169 | /* Checks whether operation a is a "superset" of b in its actions */ | |
170 | return a == job_type_lookup_merge(a, b); | |
171 | } | |
172 | ||
593fbdd2 | 173 | bool job_type_is_redundant(JobType a, UnitActiveState b); |
5cb5a6ff | 174 | |
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175 | bool job_is_runnable(Job *j); |
176 | ||
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177 | void job_add_to_run_queue(Job *j); |
178 | void job_add_to_dbus_queue(Job *j); | |
179 | ||
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180 | int job_start_timer(Job *j); |
181 | void job_timer_event(Job *j, uint64_t n_elapsed, Watch *w); | |
182 | ||
5cb5a6ff | 183 | int job_run_and_invalidate(Job *j); |
5d44db4a | 184 | int job_finish_and_invalidate(Job *j, JobResult result); |
1ffba6fe | 185 | |
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186 | char *job_dbus_path(Job *j); |
187 | ||
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188 | const char* job_type_to_string(JobType t); |
189 | JobType job_type_from_string(const char *s); | |
190 | ||
191 | const char* job_state_to_string(JobState t); | |
192 | JobState job_state_from_string(const char *s); | |
193 | ||
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194 | const char* job_mode_to_string(JobMode t); |
195 | JobMode job_mode_from_string(const char *s); | |
196 | ||
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197 | const char* job_result_to_string(JobResult t); |
198 | JobResult job_result_from_string(const char *s); | |
199 | ||
60918275 | 200 | #endif |