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udev: gracefully handle ENODEV or friends in opening device node
[thirdparty/systemd.git] / src / libsystemd / sd-event / test-event.c
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1/* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3#include <sys/wait.h>
4#include <unistd.h>
5
6#include "sd-event.h"
7
8#include "alloc-util.h"
9#include "fd-util.h"
10#include "fs-util.h"
11#include "log.h"
12#include "parse-util.h"
13#include "path-util.h"
14#include "pidfd-util.h"
15#include "process-util.h"
16#include "random-util.h"
17#include "rm-rf.h"
18#include "signal-util.h"
19#include "stdio-util.h"
20#include "string-util.h"
21#include "tests.h"
22#include "time-util.h"
23#include "tmpfile-util.h"
24
25static int prepare_handler(sd_event_source *s, void *userdata) {
26 log_info("preparing %c", PTR_TO_INT(userdata));
27 return 1;
28}
29
30static bool got_a, got_b, got_c, got_unref;
31static unsigned got_d;
32
33static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
34 sd_event_source_unref(s);
35 got_unref = true;
36 return 0;
37}
38
39static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
40
41 log_info("got IO on %c", PTR_TO_INT(userdata));
42
43 if (userdata == INT_TO_PTR('a')) {
44 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
45 assert_se(!got_a);
46 got_a = true;
47 } else if (userdata == INT_TO_PTR('b')) {
48 assert_se(!got_b);
49 got_b = true;
50 } else if (userdata == INT_TO_PTR('d')) {
51 got_d++;
52 if (got_d < 2)
53 assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
54 else
55 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
56 } else
57 assert_not_reached();
58
59 return 1;
60}
61
62static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
63
64 assert_se(s);
65 assert_se(si);
66
67 assert_se(si->si_uid == getuid());
68 assert_se(si->si_signo == SIGCHLD);
69 assert_se(si->si_code == CLD_EXITED);
70 assert_se(si->si_status == 78);
71
72 log_info("got child on %c", PTR_TO_INT(userdata));
73
74 assert_se(userdata == INT_TO_PTR('f'));
75
76 assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
77 sd_event_source_unref(s);
78
79 return 1;
80}
81
82static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
83 sd_event_source *p = NULL;
84 pid_t pid;
85 siginfo_t plain_si;
86
87 assert_se(s);
88 assert_se(si);
89
90 log_info("got signal on %c", PTR_TO_INT(userdata));
91
92 assert_se(userdata == INT_TO_PTR('e'));
93
94 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGUSR2) >= 0);
95
96 pid = fork();
97 assert_se(pid >= 0);
98
99 if (pid == 0) {
100 sigset_t ss;
101
102 assert_se(sigemptyset(&ss) >= 0);
103 assert_se(sigaddset(&ss, SIGUSR2) >= 0);
104
105 zero(plain_si);
106 assert_se(sigwaitinfo(&ss, &plain_si) >= 0);
107
108 assert_se(plain_si.si_signo == SIGUSR2);
109 assert_se(plain_si.si_value.sival_int == 4711);
110
111 _exit(78);
112 }
113
114 assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
115 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
116 assert_se(sd_event_source_set_child_process_own(p, true) >= 0);
117
118 /* We can't use structured initialization here, since the structure contains various unions and these
119 * fields lie in overlapping (carefully aligned) unions that LLVM is allergic to allow assignments
120 * to */
121 zero(plain_si);
122 plain_si.si_signo = SIGUSR2;
123 plain_si.si_code = SI_QUEUE;
124 plain_si.si_pid = getpid_cached();
125 plain_si.si_uid = getuid();
126 plain_si.si_value.sival_int = 4711;
127
128 assert_se(sd_event_source_send_child_signal(p, SIGUSR2, &plain_si, 0) >= 0);
129
130 sd_event_source_unref(s);
131
132 return 1;
133}
134
135static int defer_handler(sd_event_source *s, void *userdata) {
136 sd_event_source *p = NULL;
137
138 assert_se(s);
139
140 log_info("got defer on %c", PTR_TO_INT(userdata));
141
142 assert_se(userdata == INT_TO_PTR('d'));
143
144 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1) >= 0);
145
146 assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
147 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
148 raise(SIGUSR1);
149
150 sd_event_source_unref(s);
151
152 return 1;
153}
154
155static bool do_quit;
156
157static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
158 log_info("got timer on %c", PTR_TO_INT(userdata));
159
160 if (userdata == INT_TO_PTR('c')) {
161
162 if (do_quit) {
163 sd_event_source *p;
164
165 assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
166 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
167 } else {
168 assert_se(!got_c);
169 got_c = true;
170 }
171 } else
172 assert_not_reached();
173
174 return 2;
175}
176
177static bool got_exit = false;
178
179static int exit_handler(sd_event_source *s, void *userdata) {
180 log_info("got quit handler on %c", PTR_TO_INT(userdata));
181
182 got_exit = true;
183
184 return 3;
185}
186
187static bool got_post = false;
188
189static int post_handler(sd_event_source *s, void *userdata) {
190 log_info("got post handler");
191
192 got_post = true;
193
194 return 2;
195}
196
197TEST(basic) {
198 sd_event *e = NULL;
199 sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
200 static const char ch = 'x';
201 int a[2] = EBADF_PAIR, b[2] = EBADF_PAIR,
202 d[2] = EBADF_PAIR, k[2] = EBADF_PAIR;
203 uint64_t event_now;
204 int64_t priority;
205
206 assert_se(pipe(a) >= 0);
207 assert_se(pipe(b) >= 0);
208 assert_se(pipe(d) >= 0);
209 assert_se(pipe(k) >= 0);
210
211 assert_se(sd_event_default(&e) >= 0);
212 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
213
214 assert_se(sd_event_set_watchdog(e, true) >= 0);
215
216 /* Test whether we cleanly can destroy an io event source from its own handler */
217 got_unref = false;
218 assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
219 assert_se(write(k[1], &ch, 1) == 1);
220 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
221 assert_se(got_unref);
222
223 got_a = false, got_b = false, got_c = false, got_d = 0;
224
225 /* Add a oneshot handler, trigger it, reenable it, and trigger it again. */
226 assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
227 assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
228 assert_se(write(d[1], &ch, 1) >= 0);
229 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
230 assert_se(got_d == 1);
231 assert_se(write(d[1], &ch, 1) >= 0);
232 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
233 assert_se(got_d == 2);
234
235 assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
236 assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
237
238 do_quit = false;
239 assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
240 assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
241
242 assert_se(sd_event_source_set_priority(x, 99) >= 0);
243 assert_se(sd_event_source_get_priority(x, &priority) >= 0);
244 assert_se(priority == 99);
245 assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
246 assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
247 assert_se(sd_event_source_set_priority(z, 50) >= 0);
248 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
249 assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
250
251 /* Test for floating event sources */
252 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1) >= 0);
253 assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
254
255 assert_se(write(a[1], &ch, 1) >= 0);
256 assert_se(write(b[1], &ch, 1) >= 0);
257
258 assert_se(!got_a && !got_b && !got_c);
259
260 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
261
262 assert_se(!got_a && got_b && !got_c);
263
264 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
265
266 assert_se(!got_a && got_b && got_c);
267
268 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
269
270 assert_se(got_a && got_b && got_c);
271
272 sd_event_source_unref(x);
273 sd_event_source_unref(y);
274
275 do_quit = true;
276 assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
277 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
278 assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
279 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
280
281 assert_se(sd_event_loop(e) >= 0);
282 assert_se(got_post);
283 assert_se(got_exit);
284
285 sd_event_source_unref(z);
286 sd_event_source_unref(q);
287
288 sd_event_source_unref(w);
289
290 sd_event_unref(e);
291
292 safe_close_pair(a);
293 safe_close_pair(b);
294 safe_close_pair(d);
295 safe_close_pair(k);
296}
297
298TEST(sd_event_now) {
299 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
300 uint64_t event_now;
301
302 assert_se(sd_event_new(&e) >= 0);
303 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
304 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
305 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
306 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
307 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
308 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
309 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
310
311 assert_se(sd_event_run(e, 0) == 0);
312
313 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
314 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
315 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
316 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
317 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
318 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
319 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
320}
321
322static int last_rtqueue_sigval = 0;
323static int n_rtqueue = 0;
324
325static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
326 last_rtqueue_sigval = si->ssi_int;
327 n_rtqueue++;
328 return 0;
329}
330
331TEST(rtqueue) {
332 sd_event_source *u = NULL, *v = NULL, *s = NULL;
333 sd_event *e = NULL;
334
335 assert_se(sd_event_default(&e) >= 0);
336
337 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2) >= 0);
338 assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
339 assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
340 assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
341
342 assert_se(sd_event_source_set_priority(v, -10) >= 0);
343
344 assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
345 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
346 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
347 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
348 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
349
350 assert_se(n_rtqueue == 0);
351 assert_se(last_rtqueue_sigval == 0);
352
353 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
354 assert_se(n_rtqueue == 1);
355 assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
356
357 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
358 assert_se(n_rtqueue == 2);
359 assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
360
361 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
362 assert_se(n_rtqueue == 3);
363 assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
364
365 assert_se(sd_event_run(e, UINT64_MAX) >= 1);
366 assert_se(n_rtqueue == 4);
367 assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
368
369 assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
370 assert_se(n_rtqueue == 4);
371 assert_se(last_rtqueue_sigval == 1);
372
373 sd_event_source_unref(u);
374 sd_event_source_unref(v);
375 sd_event_source_unref(s);
376
377 sd_event_unref(e);
378}
379
380#define CREATE_EVENTS_MAX (70000U)
381
382struct inotify_context {
383 bool delete_self_handler_called;
384 unsigned create_called[CREATE_EVENTS_MAX];
385 unsigned create_overflow;
386 unsigned n_create_events;
387 const char *path;
388};
389
390static void maybe_exit(sd_event_source *s, struct inotify_context *c) {
391 unsigned n;
392
393 assert_se(s);
394 assert_se(c);
395
396 if (!c->delete_self_handler_called)
397 return;
398
399 for (n = 0; n < 3; n++) {
400 unsigned i;
401
402 if (c->create_overflow & (1U << n))
403 continue;
404
405 for (i = 0; i < c->n_create_events; i++)
406 if (!(c->create_called[i] & (1U << n)))
407 return;
408 }
409
410 sd_event_exit(sd_event_source_get_event(s), 0);
411}
412
413static int inotify_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
414 struct inotify_context *c = ASSERT_PTR(userdata);
415 const char *path, *description;
416 unsigned bit, n;
417
418 assert_se(sd_event_source_get_inotify_path(s, &path) >= 0);
419
420 assert_se(sd_event_source_get_description(s, &description) >= 0);
421 assert_se(safe_atou(description, &n) >= 0);
422
423 assert_se(n <= 3);
424 bit = 1U << n;
425
426 if (ev->mask & IN_Q_OVERFLOW) {
427 log_info("inotify-handler for %s <%s>: overflow", path, description);
428 c->create_overflow |= bit;
429 } else if (ev->mask & IN_CREATE) {
430 assert_se(path_equal_or_inode_same(path, c->path, 0));
431 if (streq(ev->name, "sub"))
432 log_debug("inotify-handler for %s <%s>: create on %s", path, description, ev->name);
433 else {
434 unsigned i;
435
436 assert_se(safe_atou(ev->name, &i) >= 0);
437 assert_se(i < c->n_create_events);
438 c->create_called[i] |= bit;
439 }
440 } else if (ev->mask & IN_DELETE) {
441 log_info("inotify-handler for %s <%s>: delete of %s", path, description, ev->name);
442 assert_se(streq(ev->name, "sub"));
443 } else
444 assert_not_reached();
445
446 maybe_exit(s, c);
447 return 1;
448}
449
450static int delete_self_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
451 struct inotify_context *c = ASSERT_PTR(userdata);
452 const char *path;
453
454 assert_se(sd_event_source_get_inotify_path(s, &path) >= 0);
455
456 if (ev->mask & IN_Q_OVERFLOW) {
457 log_info("delete-self-handler for %s: overflow", path);
458 c->delete_self_handler_called = true;
459 } else if (ev->mask & IN_DELETE_SELF) {
460 log_info("delete-self-handler for %s: delete-self", path);
461 c->delete_self_handler_called = true;
462 } else if (ev->mask & IN_IGNORED) {
463 log_info("delete-self-handler for %s: ignore", path);
464 } else
465 assert_not_reached();
466
467 maybe_exit(s, c);
468 return 1;
469}
470
471static void test_inotify_one(unsigned n_create_events) {
472 _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
473 sd_event_source *a = NULL, *b = NULL, *c = NULL, *d = NULL;
474 struct inotify_context context = {
475 .n_create_events = n_create_events,
476 };
477 sd_event *e = NULL;
478 const char *q, *pp;
479 unsigned i;
480
481 log_info("/* %s(%u) */", __func__, n_create_events);
482
483 assert_se(sd_event_default(&e) >= 0);
484
485 assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);
486 context.path = p;
487
488 assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE|IN_ONLYDIR, inotify_handler, &context) >= 0);
489 assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE|IN_DELETE|IN_DONT_FOLLOW, inotify_handler, &context) >= 0);
490 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0);
491 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0);
492 assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE|IN_DELETE|IN_EXCL_UNLINK, inotify_handler, &context) >= 0);
493 assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0);
494
495 assert_se(sd_event_source_set_description(a, "0") >= 0);
496 assert_se(sd_event_source_set_description(b, "1") >= 0);
497 assert_se(sd_event_source_set_description(c, "2") >= 0);
498
499 assert_se(sd_event_source_get_inotify_path(a, &pp) >= 0);
500 assert_se(path_equal_or_inode_same(pp, p, 0));
501 assert_se(sd_event_source_get_inotify_path(b, &pp) >= 0);
502 assert_se(path_equal_or_inode_same(pp, p, 0));
503 assert_se(sd_event_source_get_inotify_path(b, &pp) >= 0);
504 assert_se(path_equal_or_inode_same(pp, p, 0));
505
506 q = strjoina(p, "/sub");
507 assert_se(touch(q) >= 0);
508 assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0);
509
510 for (i = 0; i < n_create_events; i++) {
511 char buf[DECIMAL_STR_MAX(unsigned)+1];
512 _cleanup_free_ char *z = NULL;
513
514 xsprintf(buf, "%u", i);
515 assert_se(z = path_join(p, buf));
516
517 assert_se(touch(z) >= 0);
518 }
519
520 assert_se(unlink(q) >= 0);
521
522 assert_se(sd_event_loop(e) >= 0);
523
524 sd_event_source_unref(a);
525 sd_event_source_unref(b);
526 sd_event_source_unref(c);
527 sd_event_source_unref(d);
528
529 sd_event_unref(e);
530}
531
532TEST(inotify) {
533 test_inotify_one(100); /* should work without overflow */
534 test_inotify_one(33000); /* should trigger a q overflow */
535}
536
537static int pidfd_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
538 assert_se(s);
539 assert_se(si);
540
541 assert_se(si->si_uid == getuid());
542 assert_se(si->si_signo == SIGCHLD);
543 assert_se(si->si_code == CLD_EXITED);
544 assert_se(si->si_status == 66);
545
546 log_info("got pidfd on %c", PTR_TO_INT(userdata));
547
548 assert_se(userdata == INT_TO_PTR('p'));
549
550 assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
551 sd_event_source_unref(s);
552
553 return 0;
554}
555
556TEST(pidfd) {
557 sd_event_source *s = NULL, *t = NULL;
558 sd_event *e = NULL;
559 int pidfd;
560 pid_t pid, pid2;
561
562 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD) >= 0);
563
564 pid = fork();
565 if (pid == 0)
566 /* child */
567 _exit(66);
568
569 assert_se(pid > 1);
570
571 ASSERT_OK(pidfd = pidfd_open(pid, 0));
572
573 pid2 = fork();
574 if (pid2 == 0)
575 freeze();
576
577 assert_se(pid > 2);
578
579 assert_se(sd_event_default(&e) >= 0);
580 assert_se(sd_event_add_child_pidfd(e, &s, pidfd, WEXITED, pidfd_handler, INT_TO_PTR('p')) >= 0);
581 assert_se(sd_event_source_set_child_pidfd_own(s, true) >= 0);
582
583 /* This one should never trigger, since our second child lives forever */
584 assert_se(sd_event_add_child(e, &t, pid2, WEXITED, pidfd_handler, INT_TO_PTR('q')) >= 0);
585 assert_se(sd_event_source_set_child_process_own(t, true) >= 0);
586
587 assert_se(sd_event_loop(e) >= 0);
588
589 /* Child should still be alive */
590 assert_se(kill(pid2, 0) >= 0);
591
592 t = sd_event_source_unref(t);
593
594 /* Child should now be dead, since we dropped the ref */
595 assert_se(kill(pid2, 0) < 0 && errno == ESRCH);
596
597 sd_event_unref(e);
598}
599
600static int ratelimit_io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
601 unsigned *c = (unsigned*) userdata;
602 *c += 1;
603 return 0;
604}
605
606static int ratelimit_time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
607 int r;
608
609 r = sd_event_source_set_enabled(s, SD_EVENT_ON);
610 if (r < 0)
611 log_warning_errno(r, "Failed to turn on notify event source: %m");
612
613 r = sd_event_source_set_time(s, usec + 1000);
614 if (r < 0)
615 log_error_errno(r, "Failed to restart watchdog event source: %m");
616
617 unsigned *c = (unsigned*) userdata;
618 *c += 1;
619
620 return 0;
621}
622
623static int expired = -1;
624static int ratelimit_expired(sd_event_source *s, void *userdata) {
625 return ++expired;
626}
627
628TEST(ratelimit) {
629 _cleanup_close_pair_ int p[2] = EBADF_PAIR;
630 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
631 _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
632 uint64_t interval;
633 unsigned count, burst;
634
635 assert_se(sd_event_default(&e) >= 0);
636 assert_se(pipe2(p, O_CLOEXEC|O_NONBLOCK) >= 0);
637
638 assert_se(sd_event_add_io(e, &s, p[0], EPOLLIN, ratelimit_io_handler, &count) >= 0);
639 assert_se(sd_event_source_set_description(s, "test-ratelimit-io") >= 0);
640 assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 5) >= 0);
641 assert_se(sd_event_source_get_ratelimit(s, &interval, &burst) >= 0);
642 assert_se(interval == 1 * USEC_PER_SEC && burst == 5);
643
644 assert_se(write(p[1], "1", 1) == 1);
645
646 count = 0;
647 for (unsigned i = 0; i < 10; i++) {
648 log_debug("slow loop iteration %u", i);
649 assert_se(sd_event_run(e, UINT64_MAX) >= 0);
650 assert_se(usleep_safe(250 * USEC_PER_MSEC) >= 0);
651 }
652
653 assert_se(sd_event_source_is_ratelimited(s) == 0);
654 assert_se(count == 10);
655 log_info("ratelimit_io_handler: called %u times, event source not ratelimited", count);
656
657 assert_se(sd_event_source_set_ratelimit(s, 0, 0) >= 0);
658 assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 5) >= 0);
659
660 count = 0;
661 for (unsigned i = 0; i < 10; i++) {
662 log_debug("fast event loop iteration %u", i);
663 assert_se(sd_event_run(e, UINT64_MAX) >= 0);
664 assert_se(usleep_safe(10) >= 0);
665 }
666 log_info("ratelimit_io_handler: called %u times, event source got ratelimited", count);
667 assert_se(count < 10);
668
669 s = sd_event_source_unref(s);
670 safe_close_pair(p);
671
672 count = 0;
673 assert_se(sd_event_add_time_relative(e, &s, CLOCK_MONOTONIC, 1000, 1, ratelimit_time_handler, &count) >= 0);
674 assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 10) == 0);
675
676 do {
677 assert_se(sd_event_run(e, UINT64_MAX) >= 0);
678 } while (!sd_event_source_is_ratelimited(s));
679
680 log_info("ratelimit_time_handler: called %u times, event source got ratelimited", count);
681 assert_se(count == 10);
682
683 /* In order to get rid of active rate limit client needs to disable it explicitly */
684 assert_se(sd_event_source_set_ratelimit(s, 0, 0) >= 0);
685 assert_se(!sd_event_source_is_ratelimited(s));
686
687 assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 10) >= 0);
688
689 /* Set callback that will be invoked when we leave rate limited state. */
690 assert_se(sd_event_source_set_ratelimit_expire_callback(s, ratelimit_expired) >= 0);
691
692 do {
693 assert_se(sd_event_run(e, UINT64_MAX) >= 0);
694 } while (!sd_event_source_is_ratelimited(s));
695
696 log_info("ratelimit_time_handler: called 10 more times, event source got ratelimited");
697 assert_se(count == 20);
698
699 /* Dispatch the event loop once more and check that ratelimit expiration callback got called */
700 assert_se(sd_event_run(e, UINT64_MAX) >= 0);
701 assert_se(expired == 0);
702}
703
704TEST(simple_timeout) {
705 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
706 usec_t f, t, some_time;
707
708 some_time = random_u64_range(2 * USEC_PER_SEC);
709
710 assert_se(sd_event_default(&e) >= 0);
711
712 assert_se(sd_event_prepare(e) == 0);
713
714 f = now(CLOCK_MONOTONIC);
715 assert_se(sd_event_wait(e, some_time) >= 0);
716 t = now(CLOCK_MONOTONIC);
717
718 /* The event loop may sleep longer than the specified time (timer accuracy, scheduling latencies, …),
719 * but never shorter. Let's check that. */
720 assert_se(t >= usec_add(f, some_time));
721}
722
723static int inotify_self_destroy_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
724 sd_event_source **p = userdata;
725
726 assert_se(ev);
727 assert_se(p);
728 assert_se(*p == s);
729
730 assert_se(FLAGS_SET(ev->mask, IN_ATTRIB));
731
732 assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
733
734 *p = sd_event_source_unref(*p); /* here's what we actually intend to test: we destroy the event
735 * source from inside the event source handler */
736 return 1;
737}
738
739TEST(inotify_self_destroy) {
740 _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
741 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
742 char path[] = "/tmp/inotifyXXXXXX";
743 _cleanup_close_ int fd = -EBADF;
744
745 /* Tests that destroying an inotify event source from its own handler is safe */
746
747 assert_se(sd_event_default(&e) >= 0);
748
749 fd = mkostemp_safe(path);
750 assert_se(fd >= 0);
751 assert_se(sd_event_add_inotify_fd(e, &s, fd, IN_ATTRIB, inotify_self_destroy_handler, &s) >= 0);
752 fd = safe_close(fd);
753 assert_se(unlink(path) >= 0); /* This will trigger IN_ATTRIB because link count goes to zero */
754 assert_se(sd_event_loop(e) >= 0);
755}
756
757struct inotify_process_buffered_data_context {
758 const char *path[2];
759 unsigned i;
760};
761
762static int inotify_process_buffered_data_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
763 struct inotify_process_buffered_data_context *c = ASSERT_PTR(userdata);
764 const char *description;
765
766 assert_se(sd_event_source_get_description(s, &description) >= 0);
767
768 assert_se(c->i < 2);
769 assert_se(streq(c->path[c->i], description));
770 c->i++;
771
772 return 1;
773}
774
775TEST(inotify_process_buffered_data) {
776 _cleanup_(rm_rf_physical_and_freep) char *p = NULL, *q = NULL;
777 _cleanup_(sd_event_source_unrefp) sd_event_source *a = NULL, *b = NULL;
778 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
779 _cleanup_free_ char *z = NULL;
780
781 /* For issue #23826 */
782
783 assert_se(sd_event_default(&e) >= 0);
784
785 assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);
786 assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &q) >= 0);
787
788 struct inotify_process_buffered_data_context context = {
789 .path = { p, q },
790 };
791
792 assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE, inotify_process_buffered_data_handler, &context) >= 0);
793 assert_se(sd_event_add_inotify(e, &b, q, IN_CREATE, inotify_process_buffered_data_handler, &context) >= 0);
794
795 assert_se(z = path_join(p, "aaa"));
796 assert_se(touch(z) >= 0);
797 z = mfree(z);
798 assert_se(z = path_join(q, "bbb"));
799 assert_se(touch(z) >= 0);
800 z = mfree(z);
801
802 assert_se(sd_event_run(e, 10 * USEC_PER_SEC) > 0);
803 assert_se(sd_event_prepare(e) > 0); /* issue #23826: this was 0. */
804 assert_se(sd_event_dispatch(e) > 0);
805 assert_se(sd_event_prepare(e) == 0);
806 assert_se(sd_event_wait(e, 0) == 0);
807}
808
809TEST(fork) {
810 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
811 int r;
812
813 assert_se(sd_event_default(&e) >= 0);
814 assert_se(sd_event_prepare(e) == 0);
815
816 /* Check that after a fork the cleanup functions return NULL */
817 r = safe_fork("(bus-fork-test)", FORK_WAIT|FORK_LOG, NULL);
818 if (r == 0) {
819 assert_se(e);
820 assert_se(sd_event_ref(e) == NULL);
821 assert_se(sd_event_unref(e) == NULL);
822 _exit(EXIT_SUCCESS);
823 }
824
825 assert_se(r >= 0);
826}
827
828TEST(sd_event_source_set_io_fd) {
829 _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
830 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
831 _cleanup_close_pair_ int pfd_a[2] = EBADF_PAIR, pfd_b[2] = EBADF_PAIR;
832
833 assert_se(sd_event_default(&e) >= 0);
834
835 assert_se(pipe2(pfd_a, O_CLOEXEC) >= 0);
836 assert_se(pipe2(pfd_b, O_CLOEXEC) >= 0);
837
838 assert_se(sd_event_add_io(e, &s, pfd_a[0], EPOLLIN, NULL, INT_TO_PTR(-ENOANO)) >= 0);
839 assert_se(sd_event_source_set_io_fd_own(s, true) >= 0);
840 TAKE_FD(pfd_a[0]);
841
842 assert_se(sd_event_source_set_io_fd(s, pfd_b[0]) >= 0);
843 TAKE_FD(pfd_b[0]);
844}
845
846static int hup_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
847 unsigned *c = userdata;
848
849 assert_se(revents == EPOLLHUP);
850
851 (*c)++;
852 return 0;
853}
854
855TEST(leave_ratelimit) {
856 bool expect_ratelimit = false, manually_left_ratelimit = false;
857 _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
858 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
859 _cleanup_close_pair_ int pfd[2] = EBADF_PAIR;
860 unsigned c = 0;
861 int r;
862
863 assert_se(sd_event_default(&e) >= 0);
864
865 /* Create an event source that will continuously fire by creating a pipe whose write side is closed,
866 * and which hence will only see EOF and constant EPOLLHUP */
867 assert_se(pipe2(pfd, O_CLOEXEC) >= 0);
868 assert_se(sd_event_add_io(e, &s, pfd[0], EPOLLIN, hup_callback, &c) >= 0);
869 assert_se(sd_event_source_set_io_fd_own(s, true) >= 0);
870 assert_se(sd_event_source_set_ratelimit(s, 5*USEC_PER_MINUTE, 5) >= 0);
871
872 pfd[0] = -EBADF;
873 pfd[1] = safe_close(pfd[1]); /* Trigger continuous EOF */
874
875 for (;;) {
876 r = sd_event_prepare(e);
877 assert_se(r >= 0);
878
879 if (r == 0) {
880 r = sd_event_wait(e, UINT64_MAX);
881 assert_se(r > 0);
882 }
883
884 r = sd_event_dispatch(e);
885 assert_se(r > 0);
886
887 r = sd_event_source_is_ratelimited(s);
888 assert_se(r >= 0);
889
890 if (c < 5)
891 /* First four dispatches should just work */
892 assert_se(!r);
893 else if (c == 5) {
894 /* The fifth dispatch should still work, but we now expect the ratelimit to be hit subsequently */
895 if (!expect_ratelimit) {
896 assert_se(!r);
897 assert_se(sd_event_source_leave_ratelimit(s) == 0); /* this should be a NOP, and return 0 hence */
898 expect_ratelimit = true;
899 } else {
900 /* We expected the ratelimit, let's leave it manually, and verify it */
901 assert_se(r);
902 assert_se(sd_event_source_leave_ratelimit(s) > 0); /* we are ratelimited, hence should return > 0 */
903 assert_se(sd_event_source_is_ratelimited(s) == 0);
904
905 manually_left_ratelimit = true;
906 }
907
908 } else if (c == 6)
909 /* On the sixth iteration let's just exit */
910 break;
911 }
912
913 /* Verify we definitely hit the ratelimit and left it manually again */
914 assert_se(manually_left_ratelimit);
915}
916
917DEFINE_TEST_MAIN(LOG_DEBUG);
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