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Diffstat (limited to '')
| -rw-r--r-- | src/libsystemd/sd-event/test-event.c | 902 |
1 files changed, 902 insertions, 0 deletions
diff --git a/src/libsystemd/sd-event/test-event.c b/src/libsystemd/sd-event/test-event.c new file mode 100644 index 0000000..63d3ee7 --- /dev/null +++ b/src/libsystemd/sd-event/test-event.c @@ -0,0 +1,902 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <sys/wait.h> +#include <unistd.h> + +#include "sd-event.h" + +#include "alloc-util.h" +#include "exec-util.h" +#include "fd-util.h" +#include "fs-util.h" +#include "log.h" +#include "macro.h" +#include "missing_syscall.h" +#include "parse-util.h" +#include "path-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 "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_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0); + assert_se(!got_a); + got_a = true; + } else if (userdata == INT_TO_PTR('b')) { + assert_se(!got_b); + got_b = true; + } else if (userdata == INT_TO_PTR('d')) { + got_d++; + if (got_d < 2) + assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0); + else + assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0); + } else + assert_not_reached(); + + return 1; +} + +static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) { + + assert_se(s); + assert_se(si); + + assert_se(si->si_uid == getuid()); + assert_se(si->si_signo == SIGCHLD); + assert_se(si->si_code == CLD_EXITED); + assert_se(si->si_status == 78); + + log_info("got child on %c", PTR_TO_INT(userdata)); + + assert_se(userdata == INT_TO_PTR('f')); + + assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 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_se(s); + assert_se(si); + + log_info("got signal on %c", PTR_TO_INT(userdata)); + + assert_se(userdata == INT_TO_PTR('e')); + + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, SIGUSR2, -1) >= 0); + + pid = fork(); + assert_se(pid >= 0); + + if (pid == 0) { + sigset_t ss; + + assert_se(sigemptyset(&ss) >= 0); + assert_se(sigaddset(&ss, SIGUSR2) >= 0); + + zero(plain_si); + assert_se(sigwaitinfo(&ss, &plain_si) >= 0); + + assert_se(plain_si.si_signo == SIGUSR2); + assert_se(plain_si.si_value.sival_int == 4711); + + _exit(78); + } + + assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0); + assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); + assert_se(sd_event_source_set_child_process_own(p, true) >= 0); + + /* 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_se(sd_event_source_send_child_signal(p, SIGUSR2, &plain_si, 0) >= 0); + + sd_event_source_unref(s); + + return 1; +} + +static int defer_handler(sd_event_source *s, void *userdata) { + sd_event_source *p = NULL; + + assert_se(s); + + log_info("got defer on %c", PTR_TO_INT(userdata)); + + assert_se(userdata == INT_TO_PTR('d')); + + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0); + + assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0); + assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); + 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_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0); + assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0); + } else { + assert_se(!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; +} + +static void test_basic_one(bool with_pidfd) { + 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; + + log_info("/* %s(pidfd=%s) */", __func__, yes_no(with_pidfd)); + + assert_se(setenv("SYSTEMD_PIDFD", yes_no(with_pidfd), 1) >= 0); + + assert_se(pipe(a) >= 0); + assert_se(pipe(b) >= 0); + assert_se(pipe(d) >= 0); + assert_se(pipe(k) >= 0); + + assert_se(sd_event_default(&e) >= 0); + assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0); + + assert_se(sd_event_set_watchdog(e, true) >= 0); + + /* Test whether we cleanly can destroy an io event source from its own handler */ + got_unref = false; + assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0); + assert_se(write(k[1], &ch, 1) == 1); + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + assert_se(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_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0); + assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0); + assert_se(write(d[1], &ch, 1) >= 0); + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + assert_se(got_d == 1); + assert_se(write(d[1], &ch, 1) >= 0); + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + assert_se(got_d == 2); + + assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0); + assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0); + + do_quit = false; + assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0); + assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0); + + assert_se(sd_event_source_set_priority(x, 99) >= 0); + assert_se(sd_event_source_get_priority(x, &priority) >= 0); + assert_se(priority == 99); + assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0); + assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0); + assert_se(sd_event_source_set_priority(z, 50) >= 0); + assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0); + assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0); + + /* Test for floating event sources */ + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0); + assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0); + + assert_se(write(a[1], &ch, 1) >= 0); + assert_se(write(b[1], &ch, 1) >= 0); + + assert_se(!got_a && !got_b && !got_c); + + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + + assert_se(!got_a && got_b && !got_c); + + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + + assert_se(!got_a && got_b && got_c); + + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + + assert_se(got_a && got_b && got_c); + + sd_event_source_unref(x); + sd_event_source_unref(y); + + do_quit = true; + assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0); + assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0); + assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0); + assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0); + + assert_se(sd_event_loop(e) >= 0); + assert_se(got_post); + assert_se(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); + + assert_se(unsetenv("SYSTEMD_PIDFD") >= 0); +} + +TEST(basic) { + test_basic_one(true); /* test with pidfd */ + test_basic_one(false); /* test without pidfd */ +} + +TEST(sd_event_now) { + _cleanup_(sd_event_unrefp) sd_event *e = NULL; + uint64_t event_now; + + assert_se(sd_event_new(&e) >= 0); + assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0); + assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0); + assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0); + assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0); + assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0); + assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP); + assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP); + + assert_se(sd_event_run(e, 0) == 0); + + assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0); + assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0); + assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0); + assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0); + assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0); + assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP); + assert_se(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_se(sd_event_default(&e) >= 0); + + assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0); + assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0); + assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0); + assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0); + + assert_se(sd_event_source_set_priority(v, -10) >= 0); + + assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0); + assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0); + assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0); + assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0); + assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0); + + assert_se(n_rtqueue == 0); + assert_se(last_rtqueue_sigval == 0); + + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + assert_se(n_rtqueue == 1); + assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */ + + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + assert_se(n_rtqueue == 2); + assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */ + + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + assert_se(n_rtqueue == 3); + assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */ + + assert_se(sd_event_run(e, UINT64_MAX) >= 1); + assert_se(n_rtqueue == 4); + assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */ + + assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */ + assert_se(n_rtqueue == 4); + assert_se(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; +}; + +static void maybe_exit(sd_event_source *s, struct inotify_context *c) { + unsigned n; + + assert_se(s); + assert_se(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 = userdata; + const char *description; + unsigned bit, n; + + assert_se(sd_event_source_get_description(s, &description) >= 0); + assert_se(safe_atou(description, &n) >= 0); + + assert_se(n <= 3); + bit = 1U << n; + + if (ev->mask & IN_Q_OVERFLOW) { + log_info("inotify-handler <%s>: overflow", description); + c->create_overflow |= bit; + } else if (ev->mask & IN_CREATE) { + if (streq(ev->name, "sub")) + log_debug("inotify-handler <%s>: create on %s", description, ev->name); + else { + unsigned i; + + assert_se(safe_atou(ev->name, &i) >= 0); + assert_se(i < c->n_create_events); + c->create_called[i] |= bit; + } + } else if (ev->mask & IN_DELETE) { + log_info("inotify-handler <%s>: delete of %s", description, ev->name); + assert_se(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 = userdata; + + if (ev->mask & IN_Q_OVERFLOW) { + log_info("delete-self-handler: overflow"); + c->delete_self_handler_called = true; + } else if (ev->mask & IN_DELETE_SELF) { + log_info("delete-self-handler: delete-self"); + c->delete_self_handler_called = true; + } else if (ev->mask & IN_IGNORED) { + log_info("delete-self-handler: ignore"); + } 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; + unsigned i; + + log_info("/* %s(%u) */", __func__, n_create_events); + + assert_se(sd_event_default(&e) >= 0); + + assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0); + + assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE|IN_ONLYDIR, inotify_handler, &context) >= 0); + assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE|IN_DELETE|IN_DONT_FOLLOW, inotify_handler, &context) >= 0); + assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0); + assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0); + assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE|IN_DELETE|IN_EXCL_UNLINK, inotify_handler, &context) >= 0); + assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0); + + assert_se(sd_event_source_set_description(a, "0") >= 0); + assert_se(sd_event_source_set_description(b, "1") >= 0); + assert_se(sd_event_source_set_description(c, "2") >= 0); + + q = strjoina(p, "/sub"); + assert_se(touch(q) >= 0); + assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0); + + 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_se(z = path_join(p, buf)); + + assert_se(touch(z) >= 0); + } + + assert_se(unlink(q) >= 0); + + assert_se(sd_event_loop(e) >= 0); + + 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_se(s); + assert_se(si); + + assert_se(si->si_uid == getuid()); + assert_se(si->si_signo == SIGCHLD); + assert_se(si->si_code == CLD_EXITED); + assert_se(si->si_status == 66); + + log_info("got pidfd on %c", PTR_TO_INT(userdata)); + + assert_se(userdata == INT_TO_PTR('p')); + + assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 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_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0); + + pid = fork(); + if (pid == 0) + /* child */ + _exit(66); + + assert_se(pid > 1); + + pidfd = pidfd_open(pid, 0); + if (pidfd < 0) { + /* No pidfd_open() supported or blocked? */ + assert_se(ERRNO_IS_NOT_SUPPORTED(errno) || ERRNO_IS_PRIVILEGE(errno)); + (void) wait_for_terminate(pid, NULL); + return; + } + + pid2 = fork(); + if (pid2 == 0) + freeze(); + + assert_se(pid > 2); + + assert_se(sd_event_default(&e) >= 0); + assert_se(sd_event_add_child_pidfd(e, &s, pidfd, WEXITED, pidfd_handler, INT_TO_PTR('p')) >= 0); + assert_se(sd_event_source_set_child_pidfd_own(s, true) >= 0); + + /* This one should never trigger, since our second child lives forever */ + assert_se(sd_event_add_child(e, &t, pid2, WEXITED, pidfd_handler, INT_TO_PTR('q')) >= 0); + assert_se(sd_event_source_set_child_process_own(t, true) >= 0); + + assert_se(sd_event_loop(e) >= 0); + + /* Child should still be alive */ + assert_se(kill(pid2, 0) >= 0); + + t = sd_event_source_unref(t); + + /* Child should now be dead, since we dropped the ref */ + assert_se(kill(pid2, 0) < 0 && errno == 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_se(sd_event_default(&e) >= 0); + assert_se(pipe2(p, O_CLOEXEC|O_NONBLOCK) >= 0); + + assert_se(sd_event_add_io(e, &s, p[0], EPOLLIN, ratelimit_io_handler, &count) >= 0); + assert_se(sd_event_source_set_description(s, "test-ratelimit-io") >= 0); + assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 5) >= 0); + assert_se(sd_event_source_get_ratelimit(s, &interval, &burst) >= 0); + assert_se(interval == 1 * USEC_PER_SEC && burst == 5); + + assert_se(write(p[1], "1", 1) == 1); + + count = 0; + for (unsigned i = 0; i < 10; i++) { + log_debug("slow loop iteration %u", i); + assert_se(sd_event_run(e, UINT64_MAX) >= 0); + assert_se(usleep_safe(250 * USEC_PER_MSEC) >= 0); + } + + assert_se(sd_event_source_is_ratelimited(s) == 0); + assert_se(count == 10); + log_info("ratelimit_io_handler: called %u times, event source not ratelimited", count); + + assert_se(sd_event_source_set_ratelimit(s, 0, 0) >= 0); + assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 5) >= 0); + + count = 0; + for (unsigned i = 0; i < 10; i++) { + log_debug("fast event loop iteration %u", i); + assert_se(sd_event_run(e, UINT64_MAX) >= 0); + assert_se(usleep_safe(10) >= 0); + } + log_info("ratelimit_io_handler: called %u times, event source got ratelimited", count); + assert_se(count < 10); + + s = sd_event_source_unref(s); + safe_close_pair(p); + + count = 0; + assert_se(sd_event_add_time_relative(e, &s, CLOCK_MONOTONIC, 1000, 1, ratelimit_time_handler, &count) >= 0); + assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 10) == 0); + + do { + assert_se(sd_event_run(e, UINT64_MAX) >= 0); + } while (!sd_event_source_is_ratelimited(s)); + + log_info("ratelimit_time_handler: called %u times, event source got ratelimited", count); + assert_se(count == 10); + + /* In order to get rid of active rate limit client needs to disable it explicitly */ + assert_se(sd_event_source_set_ratelimit(s, 0, 0) >= 0); + assert_se(!sd_event_source_is_ratelimited(s)); + + assert_se(sd_event_source_set_ratelimit(s, 1 * USEC_PER_SEC, 10) >= 0); + + /* Set callback that will be invoked when we leave rate limited state. */ + assert_se(sd_event_source_set_ratelimit_expire_callback(s, ratelimit_expired) >= 0); + + do { + assert_se(sd_event_run(e, UINT64_MAX) >= 0); + } while (!sd_event_source_is_ratelimited(s)); + + log_info("ratelimit_time_handler: called 10 more times, event source got ratelimited"); + assert_se(count == 20); + + /* Dispatch the event loop once more and check that ratelimit expiration callback got called */ + assert_se(sd_event_run(e, UINT64_MAX) >= 0); + assert_se(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_se(sd_event_default(&e) >= 0); + + assert_se(sd_event_prepare(e) == 0); + + f = now(CLOCK_MONOTONIC); + assert_se(sd_event_wait(e, some_time) >= 0); + 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_se(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_se(ev); + assert_se(p); + assert_se(*p == s); + + assert_se(FLAGS_SET(ev->mask, IN_ATTRIB)); + + assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 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_se(sd_event_default(&e) >= 0); + + fd = mkostemp_safe(path); + assert_se(fd >= 0); + assert_se(sd_event_add_inotify_fd(e, &s, fd, IN_ATTRIB, inotify_self_destroy_handler, &s) >= 0); + fd = safe_close(fd); + assert_se(unlink(path) >= 0); /* This will trigger IN_ATTRIB because link count goes to zero */ + assert_se(sd_event_loop(e) >= 0); +} + +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_se(sd_event_source_get_description(s, &description) >= 0); + + assert_se(c->i < 2); + assert_se(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_se(sd_event_default(&e) >= 0); + + assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0); + assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &q) >= 0); + + struct inotify_process_buffered_data_context context = { + .path = { p, q }, + }; + + assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE, inotify_process_buffered_data_handler, &context) >= 0); + assert_se(sd_event_add_inotify(e, &b, q, IN_CREATE, inotify_process_buffered_data_handler, &context) >= 0); + + assert_se(z = path_join(p, "aaa")); + assert_se(touch(z) >= 0); + z = mfree(z); + assert_se(z = path_join(q, "bbb")); + assert_se(touch(z) >= 0); + z = mfree(z); + + assert_se(sd_event_run(e, 10 * USEC_PER_SEC) > 0); + assert_se(sd_event_prepare(e) > 0); /* issue #23826: this was 0. */ + assert_se(sd_event_dispatch(e) > 0); + assert_se(sd_event_prepare(e) == 0); + assert_se(sd_event_wait(e, 0) == 0); +} + +TEST(fork) { + _cleanup_(sd_event_unrefp) sd_event *e = NULL; + int r; + + assert_se(sd_event_default(&e) >= 0); + assert_se(sd_event_prepare(e) == 0); + + /* 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_se(e); + assert_se(sd_event_ref(e) == NULL); + assert_se(sd_event_unref(e) == NULL); + _exit(EXIT_SUCCESS); + } + + assert_se(r >= 0); +} + +static int hup_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { + unsigned *c = userdata; + + assert_se(revents == 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_se(sd_event_default(&e) >= 0); + + /* 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_se(pipe2(pfd, O_CLOEXEC) >= 0); + assert_se(sd_event_add_io(e, &s, pfd[0], EPOLLIN, hup_callback, &c) >= 0); + assert_se(sd_event_source_set_io_fd_own(s, true) >= 0); + assert_se(sd_event_source_set_ratelimit(s, 5*USEC_PER_MINUTE, 5) >= 0); + + pfd[0] = -EBADF; + pfd[1] = safe_close(pfd[1]); /* Trigger continuous EOF */ + + for (;;) { + r = sd_event_prepare(e); + assert_se(r >= 0); + + if (r == 0) { + r = sd_event_wait(e, UINT64_MAX); + assert_se(r > 0); + } + + r = sd_event_dispatch(e); + assert_se(r > 0); + + r = sd_event_source_is_ratelimited(s); + assert_se(r >= 0); + + if (c < 5) + /* First four dispatches should just work */ + assert_se(!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_se(!r); + assert_se(sd_event_source_leave_ratelimit(s) == 0); /* 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_se(r); + assert_se(sd_event_source_leave_ratelimit(s) > 0); /* we are ratelimited, hence should return > 0 */ + assert_se(sd_event_source_is_ratelimited(s) == 0); + + 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_se(manually_left_ratelimit); +} + +DEFINE_TEST_MAIN(LOG_DEBUG); |