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1 | /* | |
2 | * QMP interface for background jobs | |
3 | * | |
4 | * Copyright (c) 2011 IBM Corp. | |
5 | * Copyright (c) 2012, 2018 Red Hat, Inc. | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include "qemu/osdep.h" | |
27 | #include "qemu/job.h" | |
28 | #include "qapi/qapi-commands-job.h" | |
29 | #include "qapi/error.h" | |
30 | #include "trace/trace-root.h" | |
31 | ||
32 | /* | |
33 | * Get a job using its ID. Called with job_mutex held. | |
34 | */ | |
35 | static Job *find_job_locked(const char *id, Error **errp) | |
36 | { | |
37 | Job *job; | |
38 | ||
39 | job = job_get_locked(id); | |
40 | if (!job) { | |
41 | error_setg(errp, "Job not found"); | |
42 | return NULL; | |
43 | } | |
44 | ||
45 | return job; | |
46 | } | |
47 | ||
48 | void qmp_job_cancel(const char *id, Error **errp) | |
49 | { | |
50 | Job *job; | |
51 | ||
52 | JOB_LOCK_GUARD(); | |
53 | job = find_job_locked(id, errp); | |
54 | ||
55 | if (!job) { | |
56 | return; | |
57 | } | |
58 | ||
59 | trace_qmp_job_cancel(job); | |
60 | job_user_cancel_locked(job, true, errp); | |
61 | } | |
62 | ||
63 | void qmp_job_pause(const char *id, Error **errp) | |
64 | { | |
65 | Job *job; | |
66 | ||
67 | JOB_LOCK_GUARD(); | |
68 | job = find_job_locked(id, errp); | |
69 | ||
70 | if (!job) { | |
71 | return; | |
72 | } | |
73 | ||
74 | trace_qmp_job_pause(job); | |
75 | job_user_pause_locked(job, errp); | |
76 | } | |
77 | ||
78 | void qmp_job_resume(const char *id, Error **errp) | |
79 | { | |
80 | Job *job; | |
81 | ||
82 | JOB_LOCK_GUARD(); | |
83 | job = find_job_locked(id, errp); | |
84 | ||
85 | if (!job) { | |
86 | return; | |
87 | } | |
88 | ||
89 | trace_qmp_job_resume(job); | |
90 | job_user_resume_locked(job, errp); | |
91 | } | |
92 | ||
93 | void qmp_job_complete(const char *id, Error **errp) | |
94 | { | |
95 | Job *job; | |
96 | ||
97 | JOB_LOCK_GUARD(); | |
98 | job = find_job_locked(id, errp); | |
99 | ||
100 | if (!job) { | |
101 | return; | |
102 | } | |
103 | ||
104 | trace_qmp_job_complete(job); | |
105 | job_complete_locked(job, errp); | |
106 | } | |
107 | ||
108 | void qmp_job_finalize(const char *id, Error **errp) | |
109 | { | |
110 | Job *job; | |
111 | ||
112 | JOB_LOCK_GUARD(); | |
113 | job = find_job_locked(id, errp); | |
114 | ||
115 | if (!job) { | |
116 | return; | |
117 | } | |
118 | ||
119 | trace_qmp_job_finalize(job); | |
120 | job_ref_locked(job); | |
121 | job_finalize_locked(job, errp); | |
122 | ||
123 | job_unref_locked(job); | |
124 | } | |
125 | ||
126 | void qmp_job_dismiss(const char *id, Error **errp) | |
127 | { | |
128 | Job *job; | |
129 | ||
130 | JOB_LOCK_GUARD(); | |
131 | job = find_job_locked(id, errp); | |
132 | ||
133 | if (!job) { | |
134 | return; | |
135 | } | |
136 | ||
137 | trace_qmp_job_dismiss(job); | |
138 | job_dismiss_locked(&job, errp); | |
139 | } | |
140 | ||
141 | /* Called with job_mutex held. */ | |
142 | static JobInfo *job_query_single_locked(Job *job, Error **errp) | |
143 | { | |
144 | JobInfo *info; | |
145 | uint64_t progress_current; | |
146 | uint64_t progress_total; | |
147 | ||
148 | assert(!job_is_internal(job)); | |
149 | progress_get_snapshot(&job->progress, &progress_current, | |
150 | &progress_total); | |
151 | ||
152 | info = g_new(JobInfo, 1); | |
153 | *info = (JobInfo) { | |
154 | .id = g_strdup(job->id), | |
155 | .type = job_type(job), | |
156 | .status = job->status, | |
157 | .current_progress = progress_current, | |
158 | .total_progress = progress_total, | |
159 | .error = job->err ? | |
160 | g_strdup(error_get_pretty(job->err)) : NULL, | |
161 | }; | |
162 | ||
163 | return info; | |
164 | } | |
165 | ||
166 | JobInfoList *qmp_query_jobs(Error **errp) | |
167 | { | |
168 | JobInfoList *head = NULL, **tail = &head; | |
169 | Job *job; | |
170 | ||
171 | JOB_LOCK_GUARD(); | |
172 | ||
173 | for (job = job_next_locked(NULL); job; job = job_next_locked(job)) { | |
174 | JobInfo *value; | |
175 | ||
176 | if (job_is_internal(job)) { | |
177 | continue; | |
178 | } | |
179 | value = job_query_single_locked(job, errp); | |
180 | if (!value) { | |
181 | qapi_free_JobInfoList(head); | |
182 | return NULL; | |
183 | } | |
184 | QAPI_LIST_APPEND(tail, value); | |
185 | } | |
186 | ||
187 | return head; | |
188 | } |