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systemd/src/libsystemd/sd-event/test-event.c
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <sys/wait.h>
#include <unistd.h>
#include "sd-event.h"
#include "alloc-util.h"
#include "fd-util.h"
#include "fs-util.h"
#include "log.h"
#include "parse-util.h"
#include "path-util.h"
#include "pidfd-util.h"
#include "process-util.h"
#include "random-util.h"
#include "rm-rf.h"
#include "signal-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "tests.h"
#include "time-util.h"
#include "tmpfile-util.h"
static int prepare_handler(sd_event_source *s, void *userdata) {
log_info("preparing %c", PTR_TO_INT(userdata));
return 1;
}
static bool got_a, got_b, got_c, got_unref;
static unsigned got_d;
static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
sd_event_source_unref(s);
got_unref = true;
return 0;
}
static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
log_info("got IO on %c", PTR_TO_INT(userdata));
if (userdata == INT_TO_PTR('a')) {
ASSERT_OK(sd_event_source_set_enabled(s, SD_EVENT_OFF));
ASSERT_FALSE(got_a);
got_a = true;
} else if (userdata == INT_TO_PTR('b')) {
ASSERT_FALSE(got_b);
got_b = true;
} else if (userdata == INT_TO_PTR('d')) {
got_d++;
if (got_d < 2)
ASSERT_OK(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT));
else
ASSERT_OK(sd_event_source_set_enabled(s, SD_EVENT_OFF));
} else
assert_not_reached();
return 1;
}
static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
ASSERT_NOT_NULL(s);
ASSERT_NOT_NULL(si);
ASSERT_EQ(si->si_uid, getuid());
ASSERT_EQ(si->si_signo, SIGCHLD);
ASSERT_EQ(si->si_code, CLD_EXITED);
ASSERT_EQ(si->si_status, 78);
log_info("got child on %c", PTR_TO_INT(userdata));
ASSERT_PTR_EQ(userdata, INT_TO_PTR('f'));
ASSERT_OK(sd_event_exit(sd_event_source_get_event(s), 0));
sd_event_source_unref(s);
return 1;
}
static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
sd_event_source *p = NULL;
pid_t pid;
siginfo_t plain_si;
ASSERT_NOT_NULL(s);
ASSERT_NOT_NULL(si);
log_info("got signal on %c", PTR_TO_INT(userdata));
ASSERT_PTR_EQ(userdata, INT_TO_PTR('e'));
ASSERT_OK(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGUSR2));
ASSERT_OK_ERRNO(pid = fork());
if (pid == 0) {
sigset_t ss;
ASSERT_OK_ERRNO(sigemptyset(&ss));
ASSERT_OK_ERRNO(sigaddset(&ss, SIGUSR2));
zero(plain_si);
ASSERT_OK_ERRNO(sigwaitinfo(&ss, &plain_si));
ASSERT_EQ(plain_si.si_signo, SIGUSR2);
ASSERT_EQ(plain_si.si_value.sival_int, 4711);
_exit(78);
}
ASSERT_OK(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')));
ASSERT_OK(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT));
ASSERT_OK(sd_event_source_set_child_process_own(p, true));
/* We can't use structured initialization here, since the structure contains various unions and these
* fields lie in overlapping (carefully aligned) unions that LLVM is allergic to allow assignments
* to */
zero(plain_si);
plain_si.si_signo = SIGUSR2;
plain_si.si_code = SI_QUEUE;
plain_si.si_pid = getpid_cached();
plain_si.si_uid = getuid();
plain_si.si_value.sival_int = 4711;
ASSERT_OK(sd_event_source_send_child_signal(p, SIGUSR2, &plain_si, 0));
sd_event_source_unref(s);
return 1;
}
static int defer_handler(sd_event_source *s, void *userdata) {
sd_event_source *p = NULL;
ASSERT_NOT_NULL(s);
log_info("got defer on %c", PTR_TO_INT(userdata));
ASSERT_PTR_EQ(userdata, INT_TO_PTR('d'));
ASSERT_OK(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1));
ASSERT_OK(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')));
ASSERT_OK(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT));
raise(SIGUSR1);
sd_event_source_unref(s);
return 1;
}
static bool do_quit;
static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
log_info("got timer on %c", PTR_TO_INT(userdata));
if (userdata == INT_TO_PTR('c')) {
if (do_quit) {
sd_event_source *p;
ASSERT_OK(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')));
ASSERT_OK(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT));
} else {
ASSERT_FALSE(got_c);
got_c = true;
}
} else
assert_not_reached();
return 2;
}
static bool got_exit = false;
static int exit_handler(sd_event_source *s, void *userdata) {
log_info("got quit handler on %c", PTR_TO_INT(userdata));
got_exit = true;
return 3;
}
static bool got_post = false;
static int post_handler(sd_event_source *s, void *userdata) {
log_info("got post handler");
got_post = true;
return 2;
}
TEST(basic) {
sd_event *e = NULL;
sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
static const char ch = 'x';
int a[2] = EBADF_PAIR, b[2] = EBADF_PAIR,
d[2] = EBADF_PAIR, k[2] = EBADF_PAIR;
uint64_t event_now;
int64_t priority;
ASSERT_OK_ERRNO(pipe(a));
ASSERT_OK_ERRNO(pipe(b));
ASSERT_OK_ERRNO(pipe(d));
ASSERT_OK_ERRNO(pipe(k));
ASSERT_OK(sd_event_default(&e));
ASSERT_OK_POSITIVE(sd_event_now(e, CLOCK_MONOTONIC, &event_now));
ASSERT_OK(sd_event_set_watchdog(e, true));
/* Test whether we cleanly can destroy an io event source from its own handler */
got_unref = false;
ASSERT_OK(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL));
ASSERT_OK_EQ_ERRNO(write(k[1], &ch, 1), 1);
ASSERT_OK_POSITIVE(sd_event_run(e, UINT64_MAX));
ASSERT_TRUE(got_unref);
got_a = false, got_b = false, got_c = false, got_d = 0;
/* Add a oneshot handler, trigger it, reenable it, and trigger it again. */
ASSERT_OK(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')));
ASSERT_OK(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT));
ASSERT_OK_ERRNO(write(d[1], &ch, 1));
ASSERT_OK_POSITIVE(sd_event_run(e, UINT64_MAX));
ASSERT_EQ(got_d, 1U);
ASSERT_OK_ERRNO(write(d[1], &ch, 1));
ASSERT_OK_POSITIVE(sd_event_run(e, UINT64_MAX));
ASSERT_EQ(got_d, 2U);
ASSERT_OK(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')));
ASSERT_OK(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')));
do_quit = false;
ASSERT_OK(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')));
ASSERT_OK(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')));
ASSERT_OK(sd_event_source_set_priority(x, 99));
ASSERT_OK(sd_event_source_get_priority(x, &priority));
ASSERT_EQ(priority, 99);
ASSERT_OK(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT));
ASSERT_OK(sd_event_source_set_prepare(x, prepare_handler));
ASSERT_OK(sd_event_source_set_priority(z, 50));
ASSERT_OK(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT));
ASSERT_OK(sd_event_source_set_prepare(z, prepare_handler));
/* Test for floating event sources */
ASSERT_OK(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1));
ASSERT_OK(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL));
ASSERT_OK_ERRNO(write(a[1], &ch, 1));
ASSERT_OK_ERRNO(write(b[1], &ch, 1));
ASSERT_FALSE(got_a);
ASSERT_FALSE(got_b);
ASSERT_FALSE(got_c);
ASSERT_OK_POSITIVE(sd_event_run(e, UINT64_MAX));
ASSERT_FALSE(got_a);
ASSERT_TRUE(got_b);
ASSERT_FALSE(got_c);
ASSERT_OK_POSITIVE(sd_event_run(e, UINT64_MAX));
ASSERT_FALSE(got_a);
ASSERT_TRUE(got_b);
ASSERT_TRUE(got_c);
ASSERT_OK_POSITIVE(sd_event_run(e, UINT64_MAX));
ASSERT_TRUE(got_a);
ASSERT_TRUE(got_b);
ASSERT_TRUE(got_c);
sd_event_source_unref(x);
sd_event_source_unref(y);
do_quit = true;
ASSERT_OK(sd_event_add_post(e, NULL, post_handler, NULL));
ASSERT_OK_ZERO(sd_event_now(e, CLOCK_MONOTONIC, &event_now));
ASSERT_OK(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC));
ASSERT_OK(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT));
ASSERT_OK(sd_event_loop(e));
ASSERT_TRUE(got_post);
ASSERT_TRUE(got_exit);
sd_event_source_unref(z);
sd_event_source_unref(q);
sd_event_source_unref(w);
sd_event_unref(e);
safe_close_pair(a);
safe_close_pair(b);
safe_close_pair(d);
safe_close_pair(k);
}
TEST(sd_event_now) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
uint64_t event_now;
ASSERT_OK(sd_event_new(&e));
ASSERT_OK_POSITIVE(sd_event_now(e, CLOCK_MONOTONIC, &event_now));
ASSERT_OK_POSITIVE(sd_event_now(e, CLOCK_REALTIME, &event_now));
ASSERT_OK_POSITIVE(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now));
ASSERT_OK_POSITIVE(sd_event_now(e, CLOCK_BOOTTIME, &event_now));
ASSERT_OK_POSITIVE(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now));
ASSERT_ERROR(sd_event_now(e, -1, &event_now), EOPNOTSUPP);
ASSERT_ERROR(sd_event_now(e, 900 /* arbitrary big number */, &event_now), EOPNOTSUPP);
ASSERT_OK_ZERO(sd_event_run(e, 0));
ASSERT_OK_ZERO(sd_event_now(e, CLOCK_MONOTONIC, &event_now));
ASSERT_OK_ZERO(sd_event_now(e, CLOCK_REALTIME, &event_now));
ASSERT_OK_ZERO(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now));
ASSERT_OK_ZERO(sd_event_now(e, CLOCK_BOOTTIME, &event_now));
ASSERT_OK_ZERO(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now));
ASSERT_ERROR(sd_event_now(e, -1, &event_now), EOPNOTSUPP);
ASSERT_ERROR(sd_event_now(e, 900 /* arbitrary big number */, &event_now), EOPNOTSUPP);
}
static int last_rtqueue_sigval = 0;
static int n_rtqueue = 0;
static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
last_rtqueue_sigval = si->ssi_int;
n_rtqueue++;
return 0;
}
TEST(rtqueue) {
sd_event_source *u = NULL, *v = NULL, *s = NULL;
sd_event *e = NULL;
ASSERT_OK(sd_event_default(&e));
ASSERT_OK(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2));
ASSERT_OK(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL));
ASSERT_OK(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL));
ASSERT_OK(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL));
ASSERT_OK(sd_event_source_set_priority(v, -10));
ASSERT_OK_ERRNO(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }));
ASSERT_OK_ERRNO(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }));
ASSERT_OK_ERRNO(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }));
ASSERT_OK_ERRNO(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }));
ASSERT_OK_ERRNO(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }));
ASSERT_EQ(n_rtqueue, 0);
ASSERT_EQ(last_rtqueue_sigval, 0);
ASSERT_OK_EQ(sd_event_run(e, UINT64_MAX), 1);
ASSERT_EQ(n_rtqueue, 1);
ASSERT_EQ(last_rtqueue_sigval, 2); /* first SIGRTMIN+3 */
ASSERT_OK_EQ(sd_event_run(e, UINT64_MAX), 1);
ASSERT_EQ(n_rtqueue, 2);
ASSERT_EQ(last_rtqueue_sigval, 4); /* second SIGRTMIN+3 */
ASSERT_OK_EQ(sd_event_run(e, UINT64_MAX), 1);
ASSERT_EQ(n_rtqueue, 3);
ASSERT_EQ(last_rtqueue_sigval, 3); /* first SIGUSR2 */
ASSERT_OK_EQ(sd_event_run(e, UINT64_MAX), 1);
ASSERT_EQ(n_rtqueue, 4);
ASSERT_EQ(last_rtqueue_sigval, 1); /* SIGRTMIN+2 */
ASSERT_OK_ZERO(sd_event_run(e, 0)); /* the other SIGUSR2 is dropped, because the first one was still queued */
ASSERT_EQ(n_rtqueue, 4);
ASSERT_EQ(last_rtqueue_sigval, 1);
sd_event_source_unref(u);
sd_event_source_unref(v);
sd_event_source_unref(s);
sd_event_unref(e);
}
#define CREATE_EVENTS_MAX (70000U)
struct inotify_context {
bool delete_self_handler_called;
unsigned create_called[CREATE_EVENTS_MAX];
unsigned create_overflow;
unsigned n_create_events;
const char *path;
};
static void maybe_exit(sd_event_source *s, struct inotify_context *c) {
unsigned n;
ASSERT_NOT_NULL(s);
ASSERT_NOT_NULL(c);
if (!c->delete_self_handler_called)
return;
for (n = 0; n < 3; n++) {
unsigned i;
if (c->create_overflow & (1U << n))
continue;
for (i = 0; i < c->n_create_events; i++)
if (!(c->create_called[i] & (1U << n)))
return;
}
sd_event_exit(sd_event_source_get_event(s), 0);
}
static int inotify_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
struct inotify_context *c = ASSERT_PTR(userdata);
const char *path, *description;
unsigned bit, n;
ASSERT_OK(sd_event_source_get_inotify_path(s, &path));
ASSERT_OK(sd_event_source_get_description(s, &description));
ASSERT_OK(safe_atou(description, &n));
ASSERT_LE(n, 3U);
bit = 1U << n;
if (ev->mask & IN_Q_OVERFLOW) {
log_info("inotify-handler for %s <%s>: overflow", path, description);
c->create_overflow |= bit;
} else if (ev->mask & IN_CREATE) {
ASSERT_TRUE(path_equal_or_inode_same(path, c->path, 0));
if (streq(ev->name, "sub"))
log_debug("inotify-handler for %s <%s>: create on %s", path, description, ev->name);
else {
unsigned i;
ASSERT_OK(safe_atou(ev->name, &i));
ASSERT_LT(i, c->n_create_events);
c->create_called[i] |= bit;
}
} else if (ev->mask & IN_DELETE) {
log_info("inotify-handler for %s <%s>: delete of %s", path, description, ev->name);
ASSERT_STREQ(ev->name, "sub");
} else
assert_not_reached();
maybe_exit(s, c);
return 1;
}
static int delete_self_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
struct inotify_context *c = ASSERT_PTR(userdata);
const char *path;
ASSERT_OK(sd_event_source_get_inotify_path(s, &path));
if (ev->mask & IN_Q_OVERFLOW) {
log_info("delete-self-handler for %s: overflow", path);
c->delete_self_handler_called = true;
} else if (ev->mask & IN_DELETE_SELF) {
log_info("delete-self-handler for %s: delete-self", path);
c->delete_self_handler_called = true;
} else if (ev->mask & IN_IGNORED) {
log_info("delete-self-handler for %s: ignore", path);
} else
assert_not_reached();
maybe_exit(s, c);
return 1;
}
static void test_inotify_one(unsigned n_create_events) {
_cleanup_(rm_rf_physical_and_freep) char *p = NULL;
sd_event_source *a = NULL, *b = NULL, *c = NULL, *d = NULL;
struct inotify_context context = {
.n_create_events = n_create_events,
};
sd_event *e = NULL;
const char *q, *pp;
unsigned i;
log_info("/* %s(%u) */", __func__, n_create_events);
ASSERT_OK(sd_event_default(&e));
ASSERT_OK(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p));
context.path = p;
ASSERT_OK(sd_event_add_inotify(e, &a, p, IN_CREATE|IN_ONLYDIR, inotify_handler, &context));
ASSERT_OK(sd_event_add_inotify(e, &b, p, IN_CREATE|IN_DELETE|IN_DONT_FOLLOW, inotify_handler, &context));
ASSERT_OK(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE));
ASSERT_OK(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL));
ASSERT_OK(sd_event_add_inotify(e, &c, p, IN_CREATE|IN_DELETE|IN_EXCL_UNLINK, inotify_handler, &context));
ASSERT_OK(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE));
ASSERT_OK(sd_event_source_set_description(a, "0"));
ASSERT_OK(sd_event_source_set_description(b, "1"));
ASSERT_OK(sd_event_source_set_description(c, "2"));
ASSERT_OK(sd_event_source_get_inotify_path(a, &pp));
ASSERT_TRUE(path_equal_or_inode_same(pp, p, 0));
ASSERT_OK(sd_event_source_get_inotify_path(b, &pp));
ASSERT_TRUE(path_equal_or_inode_same(pp, p, 0));
ASSERT_OK(sd_event_source_get_inotify_path(b, &pp));
ASSERT_TRUE(path_equal_or_inode_same(pp, p, 0));
q = strjoina(p, "/sub");
ASSERT_OK(touch(q));
ASSERT_OK(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context));
for (i = 0; i < n_create_events; i++) {
char buf[DECIMAL_STR_MAX(unsigned)+1];
_cleanup_free_ char *z = NULL;
xsprintf(buf, "%u", i);
ASSERT_NOT_NULL(z = path_join(p, buf));
ASSERT_OK(touch(z));
}
ASSERT_OK_ERRNO(unlink(q));
ASSERT_OK(sd_event_loop(e));
sd_event_source_unref(a);
sd_event_source_unref(b);
sd_event_source_unref(c);
sd_event_source_unref(d);
sd_event_unref(e);
}
TEST(inotify) {
test_inotify_one(100); /* should work without overflow */
test_inotify_one(33000); /* should trigger a q overflow */
}
static int pidfd_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
ASSERT_NOT_NULL(s);
ASSERT_NOT_NULL(si);
ASSERT_EQ(si->si_uid, getuid());
ASSERT_EQ(si->si_signo, SIGCHLD);
ASSERT_EQ(si->si_code, CLD_EXITED);
ASSERT_EQ(si->si_status, 66);
log_info("got pidfd on %c", PTR_TO_INT(userdata));
ASSERT_PTR_EQ(userdata, INT_TO_PTR('p'));
ASSERT_OK(sd_event_exit(sd_event_source_get_event(s), 0));
sd_event_source_unref(s);
return 0;
}
TEST(pidfd) {
sd_event_source *s = NULL, *t = NULL;
sd_event *e = NULL;
int pidfd;
pid_t pid, pid2;
ASSERT_OK(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD));
ASSERT_OK_ERRNO(pid = fork());
if (pid == 0)
/* child */
_exit(66);
ASSERT_OK(pidfd = pidfd_open(pid, 0));
ASSERT_OK_ERRNO(pid2 = fork());
if (pid2 == 0)
freeze();
ASSERT_OK(sd_event_default(&e));
ASSERT_OK(sd_event_add_child_pidfd(e, &s, pidfd, WEXITED, pidfd_handler, INT_TO_PTR('p')));
ASSERT_OK(sd_event_source_set_child_pidfd_own(s, true));
/* This one should never trigger, since our second child lives forever */
ASSERT_OK(sd_event_add_child(e, &t, pid2, WEXITED, pidfd_handler, INT_TO_PTR('q')));
ASSERT_OK(sd_event_source_set_child_process_own(t, true));
ASSERT_OK(sd_event_loop(e));
/* Child should still be alive */
ASSERT_OK_ERRNO(kill(pid2, 0));
t = sd_event_source_unref(t);
/* Child should now be dead, since we dropped the ref */
ASSERT_ERROR_ERRNO(kill(pid2, 0), ESRCH);
sd_event_unref(e);
}
static int ratelimit_io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
unsigned *c = (unsigned*) userdata;
*c += 1;
return 0;
}
static int ratelimit_time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
int r;
r = sd_event_source_set_enabled(s, SD_EVENT_ON);
if (r < 0)
log_warning_errno(r, "Failed to turn on notify event source: %m");
r = sd_event_source_set_time(s, usec + 1000);
if (r < 0)
log_error_errno(r, "Failed to restart watchdog event source: %m");
unsigned *c = (unsigned*) userdata;
*c += 1;
return 0;
}
static int expired = -1;
static int ratelimit_expired(sd_event_source *s, void *userdata) {
return ++expired;
}
TEST(ratelimit) {
_cleanup_close_pair_ int p[2] = EBADF_PAIR;
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
uint64_t interval;
unsigned count, burst;
ASSERT_OK(sd_event_default(&e));
ASSERT_OK_ERRNO(pipe2(p, O_CLOEXEC|O_NONBLOCK));
ASSERT_OK(sd_event_add_io(e, &s, p[0], EPOLLIN, ratelimit_io_handler, &count));
ASSERT_OK(sd_event_source_set_description(s, "test-ratelimit-io"));
ASSERT_OK(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 5));
ASSERT_OK(sd_event_source_get_ratelimit(s, &interval, &burst));
ASSERT_EQ(interval, 1 * USEC_PER_SEC);
ASSERT_EQ(burst, 5U);
ASSERT_OK_EQ_ERRNO(write(p[1], "1", 1), 1);
count = 0;
for (unsigned i = 0; i < 10; i++) {
log_debug("slow loop iteration %u", i);
ASSERT_OK(sd_event_run(e, UINT64_MAX));
ASSERT_OK(usleep_safe(250 * USEC_PER_MSEC));
}
ASSERT_OK_ZERO(sd_event_source_is_ratelimited(s));
ASSERT_EQ(count, 10U);
log_info("ratelimit_io_handler: called %u times, event source not ratelimited", count);
ASSERT_OK(sd_event_source_set_ratelimit(s, 0, 0));
ASSERT_OK(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 5));
count = 0;
for (unsigned i = 0; i < 10; i++) {
log_debug("fast event loop iteration %u", i);
ASSERT_OK(sd_event_run(e, UINT64_MAX));
ASSERT_OK(usleep_safe(10));
}
log_info("ratelimit_io_handler: called %u times, event source got ratelimited", count);
ASSERT_LT(count, 10U);
s = sd_event_source_unref(s);
safe_close_pair(p);
count = 0;
ASSERT_OK(sd_event_add_time_relative(e, &s, CLOCK_MONOTONIC, 1000, 1, ratelimit_time_handler, &count));
ASSERT_OK_ZERO(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 10));
do {
ASSERT_OK(sd_event_run(e, UINT64_MAX));
} while (!sd_event_source_is_ratelimited(s));
log_info("ratelimit_time_handler: called %u times, event source got ratelimited", count);
ASSERT_EQ(count, 10U);
/* In order to get rid of active rate limit client needs to disable it explicitly */
ASSERT_OK(sd_event_source_set_ratelimit(s, 0, 0));
ASSERT_OK_ZERO(sd_event_source_is_ratelimited(s));
ASSERT_OK(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 10));
/* Set callback that will be invoked when we leave rate limited state. */
ASSERT_OK(sd_event_source_set_ratelimit_expire_callback(s, ratelimit_expired));
do {
ASSERT_OK(sd_event_run(e, UINT64_MAX));
} while (!sd_event_source_is_ratelimited(s));
log_info("ratelimit_time_handler: called 10 more times, event source got ratelimited");
ASSERT_EQ(count, 20U);
/* Dispatch the event loop once more and check that ratelimit expiration callback got called */
ASSERT_OK(sd_event_run(e, UINT64_MAX));
ASSERT_EQ(expired, 0);
}
TEST(simple_timeout) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
usec_t f, t, some_time;
some_time = random_u64_range(2 * USEC_PER_SEC);
ASSERT_OK(sd_event_default(&e));
ASSERT_OK_ZERO(sd_event_prepare(e));
f = now(CLOCK_MONOTONIC);
ASSERT_OK(sd_event_wait(e, some_time));
t = now(CLOCK_MONOTONIC);
/* The event loop may sleep longer than the specified time (timer accuracy, scheduling latencies, …),
* but never shorter. Let's check that. */
ASSERT_GE(t, usec_add(f, some_time));
}
static int inotify_self_destroy_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
sd_event_source **p = userdata;
ASSERT_NOT_NULL(ev);
ASSERT_NOT_NULL(p);
ASSERT_PTR_EQ(*p, s);
ASSERT_TRUE(FLAGS_SET(ev->mask, IN_ATTRIB));
ASSERT_OK(sd_event_exit(sd_event_source_get_event(s), 0));
*p = sd_event_source_unref(*p); /* here's what we actually intend to test: we destroy the event
* source from inside the event source handler */
return 1;
}
TEST(inotify_self_destroy) {
_cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
char path[] = "/tmp/inotifyXXXXXX";
_cleanup_close_ int fd = -EBADF;
/* Tests that destroying an inotify event source from its own handler is safe */
ASSERT_OK(sd_event_default(&e));
ASSERT_OK(fd = mkostemp_safe(path));
ASSERT_OK(sd_event_add_inotify_fd(e, &s, fd, IN_ATTRIB, inotify_self_destroy_handler, &s));
fd = safe_close(fd);
ASSERT_OK_ERRNO(unlink(path)); /* This will trigger IN_ATTRIB because link count goes to zero */
ASSERT_OK(sd_event_loop(e));
}
struct inotify_process_buffered_data_context {
const char *path[2];
unsigned i;
};
static int inotify_process_buffered_data_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
struct inotify_process_buffered_data_context *c = ASSERT_PTR(userdata);
const char *description;
ASSERT_OK(sd_event_source_get_description(s, &description));
ASSERT_LT(c->i, 2U);
ASSERT_STREQ(c->path[c->i], description);
c->i++;
return 1;
}
TEST(inotify_process_buffered_data) {
_cleanup_(rm_rf_physical_and_freep) char *p = NULL, *q = NULL;
_cleanup_(sd_event_source_unrefp) sd_event_source *a = NULL, *b = NULL;
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_free_ char *z = NULL;
/* For issue #23826 */
ASSERT_OK(sd_event_default(&e));
ASSERT_OK(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p));
ASSERT_OK(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &q));
struct inotify_process_buffered_data_context context = {
.path = { p, q },
};
ASSERT_OK(sd_event_add_inotify(e, &a, p, IN_CREATE, inotify_process_buffered_data_handler, &context));
ASSERT_OK(sd_event_add_inotify(e, &b, q, IN_CREATE, inotify_process_buffered_data_handler, &context));
ASSERT_NOT_NULL(z = path_join(p, "aaa"));
ASSERT_OK(touch(z));
z = mfree(z);
ASSERT_NOT_NULL(z = path_join(q, "bbb"));
ASSERT_OK(touch(z));
z = mfree(z);
ASSERT_OK_POSITIVE(sd_event_run(e, 10 * USEC_PER_SEC));
ASSERT_OK_POSITIVE(sd_event_prepare(e)); /* issue #23826: this was 0. */
ASSERT_OK_POSITIVE(sd_event_dispatch(e));
ASSERT_OK_ZERO(sd_event_prepare(e));
ASSERT_OK_ZERO(sd_event_wait(e, 0));
}
static int inotify_handler_issue_38265(sd_event_source *s, const struct inotify_event *event, void *userdata) {
log_debug("Inotify event: mask=0x%x name=%s", event->mask, event->name);
return 0;
}
TEST(inotify_issue_38265) {
_cleanup_(rm_rf_physical_and_freep) char *t = NULL;
_cleanup_(sd_event_source_unrefp) sd_event_source *a = NULL, *b = NULL;
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_free_ char *p = NULL;
/* For issue #38265. */
ASSERT_OK(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &t));
ASSERT_OK(sd_event_default(&e));
/* Create inode data that watches IN_MODIFY */
ASSERT_OK(sd_event_add_inotify(e, &a, t, IN_CREATE | IN_MODIFY, inotify_handler_issue_38265, NULL));
ASSERT_OK(sd_event_add_inotify(e, &b, t, IN_CREATE, inotify_handler_issue_38265, NULL));
/* Then drop the event source that is interested in IN_MODIFY */
ASSERT_NULL(a = sd_event_source_unref(a));
/* Trigger IN_MODIFY (of course with IN_CREATE) */
ASSERT_NOT_NULL(p = path_join(t, "hoge"));
ASSERT_OK(write_string_file(p, "aaa", WRITE_STRING_FILE_CREATE));
for (unsigned i = 1; i < 5; i++) {
log_debug("Running event loop cycle %u to process inotify events...", i);
ASSERT_OK(sd_event_run(e, USEC_PER_MSEC));
}
}
TEST(fork) {
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
int r;
ASSERT_OK(sd_event_default(&e));
ASSERT_OK_ZERO(sd_event_prepare(e));
/* Check that after a fork the cleanup functions return NULL */
r = safe_fork("(bus-fork-test)", FORK_WAIT|FORK_LOG, NULL);
if (r == 0) {
ASSERT_NOT_NULL(e);
ASSERT_NULL(sd_event_ref(e));
ASSERT_NULL(sd_event_unref(e));
_exit(EXIT_SUCCESS);
}
ASSERT_OK(r);
}
TEST(sd_event_source_set_io_fd) {
_cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_close_pair_ int pfd_a[2] = EBADF_PAIR, pfd_b[2] = EBADF_PAIR;
ASSERT_OK(sd_event_default(&e));
ASSERT_OK_ERRNO(pipe2(pfd_a, O_CLOEXEC));
ASSERT_OK_ERRNO(pipe2(pfd_b, O_CLOEXEC));
ASSERT_OK(sd_event_add_io(e, &s, pfd_a[0], EPOLLIN, NULL, INT_TO_PTR(-ENOANO)));
ASSERT_OK(sd_event_source_set_io_fd_own(s, true));
TAKE_FD(pfd_a[0]);
ASSERT_OK(sd_event_source_set_io_fd(s, pfd_b[0]));
TAKE_FD(pfd_b[0]);
}
static int hup_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
unsigned *c = userdata;
ASSERT_EQ(revents, (uint32_t) EPOLLHUP);
(*c)++;
return 0;
}
TEST(leave_ratelimit) {
bool expect_ratelimit = false, manually_left_ratelimit = false;
_cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL;
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
_cleanup_close_pair_ int pfd[2] = EBADF_PAIR;
unsigned c = 0;
int r;
ASSERT_OK(sd_event_default(&e));
/* Create an event source that will continuously fire by creating a pipe whose write side is closed,
* and which hence will only see EOF and constant EPOLLHUP */
ASSERT_OK_ERRNO(pipe2(pfd, O_CLOEXEC));
ASSERT_OK(sd_event_add_io(e, &s, pfd[0], EPOLLIN, hup_callback, &c));
ASSERT_OK(sd_event_source_set_io_fd_own(s, true));
ASSERT_OK(sd_event_source_set_ratelimit(s, 5*USEC_PER_MINUTE, 5));
pfd[0] = -EBADF;
pfd[1] = safe_close(pfd[1]); /* Trigger continuous EOF */
for (;;) {
ASSERT_OK(r = sd_event_prepare(e));
if (r == 0)
ASSERT_OK_POSITIVE(sd_event_wait(e, UINT64_MAX));
ASSERT_OK_POSITIVE(sd_event_dispatch(e));
ASSERT_OK(r = sd_event_source_is_ratelimited(s));
if (c < 5)
/* First four dispatches should just work */
ASSERT_FALSE(r);
else if (c == 5) {
/* The fifth dispatch should still work, but we now expect the ratelimit to be hit subsequently */
if (!expect_ratelimit) {
ASSERT_FALSE(r);
ASSERT_OK_ZERO(sd_event_source_leave_ratelimit(s)); /* this should be a NOP, and return 0 hence */
expect_ratelimit = true;
} else {
/* We expected the ratelimit, let's leave it manually, and verify it */
ASSERT_TRUE(r);
ASSERT_OK_POSITIVE(sd_event_source_leave_ratelimit(s)); /* we are ratelimited, hence should return > 0 */
ASSERT_OK_ZERO(sd_event_source_is_ratelimited(s));
manually_left_ratelimit = true;
}
} else if (c == 6)
/* On the sixth iteration let's just exit */
break;
}
/* Verify we definitely hit the ratelimit and left it manually again */
ASSERT_TRUE(manually_left_ratelimit);
}
DEFINE_TEST_MAIN(LOG_DEBUG);
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