diff options
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | tests/meson.build | 3 | ||||
| -rw-r--r-- | tests/test-fdmon-epoll.c | 73 |
3 files changed, 77 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 534fb4c519..5eed1e692b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2132,6 +2132,7 @@ F: migration/block* F: include/block/aio.h F: include/block/aio-wait.h F: scripts/qemugdb/aio.py +F: tests/test-fdmon-epoll.c T: git https://github.com/stefanha/qemu.git block Block SCSI subsystem diff --git a/tests/meson.build b/tests/meson.build index 8c3e930687..04072a64ca 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -170,6 +170,9 @@ if have_block if 'CONFIG_NETTLE' in config_host or 'CONFIG_GCRYPT' in config_host tests += {'test-crypto-pbkdf': [io]} endif + if 'CONFIG_EPOLL_CREATE1' in config_host + tests += {'test-fdmon-epoll': [testblock]} + endif benchs += { 'benchmark-crypto-hash': [crypto], 'benchmark-crypto-hmac': [crypto], diff --git a/tests/test-fdmon-epoll.c b/tests/test-fdmon-epoll.c new file mode 100644 index 0000000000..11fd8a2fa9 --- /dev/null +++ b/tests/test-fdmon-epoll.c @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * fdmon-epoll tests + * + * Copyright (c) 2020 Red Hat, Inc. + */ + +#include "qemu/osdep.h" +#include "block/aio.h" +#include "qapi/error.h" +#include "qemu/main-loop.h" + +static AioContext *ctx; + +static void dummy_fd_handler(EventNotifier *notifier) +{ + event_notifier_test_and_clear(notifier); +} + +static void add_event_notifiers(EventNotifier *notifiers, size_t n) +{ + for (size_t i = 0; i < n; i++) { + event_notifier_init(¬ifiers[i], false); + aio_set_event_notifier(ctx, ¬ifiers[i], false, + dummy_fd_handler, NULL); + } +} + +static void remove_event_notifiers(EventNotifier *notifiers, size_t n) +{ + for (size_t i = 0; i < n; i++) { + aio_set_event_notifier(ctx, ¬ifiers[i], false, NULL, NULL); + event_notifier_cleanup(¬ifiers[i]); + } +} + +/* Check that fd handlers work when external clients are disabled */ +static void test_external_disabled(void) +{ + EventNotifier notifiers[100]; + + /* fdmon-epoll is only enabled when many fd handlers are registered */ + add_event_notifiers(notifiers, G_N_ELEMENTS(notifiers)); + + event_notifier_set(¬ifiers[0]); + assert(aio_poll(ctx, true)); + + aio_disable_external(ctx); + event_notifier_set(¬ifiers[0]); + assert(aio_poll(ctx, true)); + aio_enable_external(ctx); + + remove_event_notifiers(notifiers, G_N_ELEMENTS(notifiers)); +} + +int main(int argc, char **argv) +{ + /* + * This code relies on the fact that fdmon-io_uring disables itself when + * the glib main loop is in use. The main loop uses fdmon-poll and upgrades + * to fdmon-epoll when the number of fds exceeds a threshold. + */ + qemu_init_main_loop(&error_fatal); + ctx = qemu_get_aio_context(); + + while (g_main_context_iteration(NULL, false)) { + /* Do nothing */ + } + + g_test_init(&argc, &argv, NULL); + g_test_add_func("/fdmon-epoll/external-disabled", test_external_disabled); + return g_test_run(); +} |