quorum: Inline quorum_aio_cb()
[qemu.git] / tests / test-blockjob-txn.c
1 /*
2 * Blockjob transactions tests
3 *
4 * Copyright Red Hat, Inc. 2015
5 *
6 * Authors:
7 * Stefan Hajnoczi <stefanha@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
10 * See the COPYING.LIB file in the top-level directory.
11 */
12
13 #include "qemu/osdep.h"
14 #include "qapi/error.h"
15 #include "qemu/main-loop.h"
16 #include "block/blockjob_int.h"
17 #include "sysemu/block-backend.h"
18
19 typedef struct {
20 BlockJob common;
21 unsigned int iterations;
22 bool use_timer;
23 int rc;
24 int *result;
25 } TestBlockJob;
26
27 static void test_block_job_complete(BlockJob *job, void *opaque)
28 {
29 BlockDriverState *bs = blk_bs(job->blk);
30 int rc = (intptr_t)opaque;
31
32 if (block_job_is_cancelled(job)) {
33 rc = -ECANCELED;
34 }
35
36 block_job_completed(job, rc);
37 bdrv_unref(bs);
38 }
39
40 static void coroutine_fn test_block_job_run(void *opaque)
41 {
42 TestBlockJob *s = opaque;
43 BlockJob *job = &s->common;
44
45 while (s->iterations--) {
46 if (s->use_timer) {
47 block_job_sleep_ns(job, QEMU_CLOCK_REALTIME, 0);
48 } else {
49 block_job_yield(job);
50 }
51
52 if (block_job_is_cancelled(job)) {
53 break;
54 }
55 }
56
57 block_job_defer_to_main_loop(job, test_block_job_complete,
58 (void *)(intptr_t)s->rc);
59 }
60
61 typedef struct {
62 TestBlockJob *job;
63 int *result;
64 } TestBlockJobCBData;
65
66 static void test_block_job_cb(void *opaque, int ret)
67 {
68 TestBlockJobCBData *data = opaque;
69 if (!ret && block_job_is_cancelled(&data->job->common)) {
70 ret = -ECANCELED;
71 }
72 *data->result = ret;
73 g_free(data);
74 }
75
76 static const BlockJobDriver test_block_job_driver = {
77 .instance_size = sizeof(TestBlockJob),
78 .start = test_block_job_run,
79 };
80
81 /* Create a block job that completes with a given return code after a given
82 * number of event loop iterations. The return code is stored in the given
83 * result pointer.
84 *
85 * The event loop iterations can either be handled automatically with a 0 delay
86 * timer, or they can be stepped manually by entering the coroutine.
87 */
88 static BlockJob *test_block_job_start(unsigned int iterations,
89 bool use_timer,
90 int rc, int *result)
91 {
92 BlockDriverState *bs;
93 TestBlockJob *s;
94 TestBlockJobCBData *data;
95 static unsigned counter;
96 char job_id[24];
97
98 data = g_new0(TestBlockJobCBData, 1);
99 bs = bdrv_new();
100 snprintf(job_id, sizeof(job_id), "job%u", counter++);
101 s = block_job_create(job_id, &test_block_job_driver, bs, 0,
102 BLOCK_JOB_DEFAULT, test_block_job_cb,
103 data, &error_abort);
104 s->iterations = iterations;
105 s->use_timer = use_timer;
106 s->rc = rc;
107 s->result = result;
108 data->job = s;
109 data->result = result;
110 block_job_start(&s->common);
111 return &s->common;
112 }
113
114 static void test_single_job(int expected)
115 {
116 BlockJob *job;
117 BlockJobTxn *txn;
118 int result = -EINPROGRESS;
119
120 txn = block_job_txn_new();
121 job = test_block_job_start(1, true, expected, &result);
122 block_job_txn_add_job(txn, job);
123
124 if (expected == -ECANCELED) {
125 block_job_cancel(job);
126 }
127
128 while (result == -EINPROGRESS) {
129 aio_poll(qemu_get_aio_context(), true);
130 }
131 g_assert_cmpint(result, ==, expected);
132
133 block_job_txn_unref(txn);
134 }
135
136 static void test_single_job_success(void)
137 {
138 test_single_job(0);
139 }
140
141 static void test_single_job_failure(void)
142 {
143 test_single_job(-EIO);
144 }
145
146 static void test_single_job_cancel(void)
147 {
148 test_single_job(-ECANCELED);
149 }
150
151 static void test_pair_jobs(int expected1, int expected2)
152 {
153 BlockJob *job1;
154 BlockJob *job2;
155 BlockJobTxn *txn;
156 int result1 = -EINPROGRESS;
157 int result2 = -EINPROGRESS;
158
159 txn = block_job_txn_new();
160 job1 = test_block_job_start(1, true, expected1, &result1);
161 block_job_txn_add_job(txn, job1);
162 job2 = test_block_job_start(2, true, expected2, &result2);
163 block_job_txn_add_job(txn, job2);
164
165 if (expected1 == -ECANCELED) {
166 block_job_cancel(job1);
167 }
168 if (expected2 == -ECANCELED) {
169 block_job_cancel(job2);
170 }
171
172 while (result1 == -EINPROGRESS || result2 == -EINPROGRESS) {
173 aio_poll(qemu_get_aio_context(), true);
174 }
175
176 /* Failure or cancellation of one job cancels the other job */
177 if (expected1 != 0) {
178 expected2 = -ECANCELED;
179 } else if (expected2 != 0) {
180 expected1 = -ECANCELED;
181 }
182
183 g_assert_cmpint(result1, ==, expected1);
184 g_assert_cmpint(result2, ==, expected2);
185
186 block_job_txn_unref(txn);
187 }
188
189 static void test_pair_jobs_success(void)
190 {
191 test_pair_jobs(0, 0);
192 }
193
194 static void test_pair_jobs_failure(void)
195 {
196 /* Test both orderings. The two jobs run for a different number of
197 * iterations so the code path is different depending on which job fails
198 * first.
199 */
200 test_pair_jobs(-EIO, 0);
201 test_pair_jobs(0, -EIO);
202 }
203
204 static void test_pair_jobs_cancel(void)
205 {
206 test_pair_jobs(-ECANCELED, 0);
207 test_pair_jobs(0, -ECANCELED);
208 }
209
210 static void test_pair_jobs_fail_cancel_race(void)
211 {
212 BlockJob *job1;
213 BlockJob *job2;
214 BlockJobTxn *txn;
215 int result1 = -EINPROGRESS;
216 int result2 = -EINPROGRESS;
217
218 txn = block_job_txn_new();
219 job1 = test_block_job_start(1, true, -ECANCELED, &result1);
220 block_job_txn_add_job(txn, job1);
221 job2 = test_block_job_start(2, false, 0, &result2);
222 block_job_txn_add_job(txn, job2);
223
224 block_job_cancel(job1);
225
226 /* Now make job2 finish before the main loop kicks jobs. This simulates
227 * the race between a pending kick and another job completing.
228 */
229 block_job_enter(job2);
230 block_job_enter(job2);
231
232 while (result1 == -EINPROGRESS || result2 == -EINPROGRESS) {
233 aio_poll(qemu_get_aio_context(), true);
234 }
235
236 g_assert_cmpint(result1, ==, -ECANCELED);
237 g_assert_cmpint(result2, ==, -ECANCELED);
238
239 block_job_txn_unref(txn);
240 }
241
242 int main(int argc, char **argv)
243 {
244 qemu_init_main_loop(&error_abort);
245
246 g_test_init(&argc, &argv, NULL);
247 g_test_add_func("/single/success", test_single_job_success);
248 g_test_add_func("/single/failure", test_single_job_failure);
249 g_test_add_func("/single/cancel", test_single_job_cancel);
250 g_test_add_func("/pair/success", test_pair_jobs_success);
251 g_test_add_func("/pair/failure", test_pair_jobs_failure);
252 g_test_add_func("/pair/cancel", test_pair_jobs_cancel);
253 g_test_add_func("/pair/fail-cancel-race", test_pair_jobs_fail_cancel_race);
254 return g_test_run();
255 }