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test: start vhost-user reconnect test 

This is a simple reconnect test, that simply checks if vhost-user
reconnection is possible and restore the state. A more complete test
would actually manipulate and check the ring contents (such extended
testing would benefit from the libvhost-user proposed in QEMU list to
avoid duplication of ring manipulations)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Victor Kaplansky <victork@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-06-06 18:45:08 +02:00 committed by Michael S. Tsirkin
parent 0ee2e9daf8
commit 4616e3592b
1 changed files with 119 additions and 17 deletions
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136
tests/vhost-user-test.c
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@ -33,7 +33,7 @@
#define QEMU_CMD_ACCEL " -machine accel=tcg"
#define QEMU_CMD_MEM " -m %d -object memory-backend-file,id=mem,size=%dM,"\
"mem-path=%s,share=on -numa node,memdev=mem"
#define QEMU_CMD_CHR " -chardev socket,id=%s,path=%s"
#define QEMU_CMD_CHR " -chardev socket,id=%s,path=%s%s"
#define QEMU_CMD_NETDEV " -netdev vhost-user,id=net0,chardev=%s,vhostforce"
#define QEMU_CMD_NET " -device virtio-net-pci,netdev=net0,romfile=./pc-bios/pxe-virtio.rom"
@ -245,7 +245,12 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
if (msg.size) {
p += VHOST_USER_HDR_SIZE;
g_assert_cmpint(qemu_chr_fe_read_all(chr, p, msg.size), ==, msg.size);
size = qemu_chr_fe_read_all(chr, p, msg.size);
if (size != msg.size) {
g_test_message("Wrong message size received %d != %d\n",
size, msg.size);
return;
}
}
switch (msg.request) {
@ -362,17 +367,10 @@ static const char *init_hugepagefs(const char *path)
static TestServer *test_server_new(const gchar *name)
{
TestServer *server = g_new0(TestServer, 1);
gchar *chr_path;
server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
chr_path = g_strdup_printf("unix:%s,server,nowait", server->socket_path);
server->chr_name = g_strdup_printf("chr-%s", name);
server->chr = qemu_chr_new(server->chr_name, chr_path, NULL);
g_free(chr_path);
qemu_chr_add_handlers(server->chr, chr_can_read, chr_read, NULL, server);
g_mutex_init(&server->data_mutex);
g_cond_init(&server->data_cond);
@ -382,13 +380,34 @@ static TestServer *test_server_new(const gchar *name)
return server;
}
#define GET_QEMU_CMD(s) \
g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name, \
(s)->socket_path, (s)->chr_name)
static void test_server_create_chr(TestServer *server, const gchar *opt)
{
gchar *chr_path;
#define GET_QEMU_CMDE(s, mem, extra, ...) \
g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name, \
(s)->socket_path, (s)->chr_name, ##__VA_ARGS__)
chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
server->chr = qemu_chr_new(server->chr_name, chr_path, NULL);
g_free(chr_path);
qemu_chr_add_handlers(server->chr, chr_can_read, chr_read, NULL, server);
}
static void test_server_listen(TestServer *server)
{
test_server_create_chr(server, ",server,nowait");
}
static inline void test_server_connect(TestServer *server)
{
test_server_create_chr(server, ",reconnect=1");
}
#define GET_QEMU_CMD(s) \
g_strdup_printf(QEMU_CMD, 512, 512, (root), (s)->chr_name, \
(s)->socket_path, "", (s)->chr_name)
#define GET_QEMU_CMDE(s, mem, chr_opts, extra, ...) \
g_strdup_printf(QEMU_CMD extra, (mem), (mem), (root), (s)->chr_name, \
(s)->socket_path, (chr_opts), (s)->chr_name, ##__VA_ARGS__)
static gboolean _test_server_free(TestServer *server)
{
@ -536,7 +555,10 @@ static void test_migrate(void)
guint8 *log;
guint64 size;
cmd = GET_QEMU_CMDE(s, 2, "");
test_server_listen(s);
test_server_listen(dest);
cmd = GET_QEMU_CMDE(s, 2, "", "");
from = qtest_start(cmd);
g_free(cmd);
@ -544,7 +566,7 @@ static void test_migrate(void)
size = get_log_size(s);
g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
cmd = GET_QEMU_CMDE(dest, 2, " -incoming %s", uri);
cmd = GET_QEMU_CMDE(dest, 2, "", " -incoming %s", uri);
to = qtest_init(cmd);
g_free(cmd);
@ -604,6 +626,80 @@ static void test_migrate(void)
global_qtest = global;
}
#ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
static void wait_for_rings_started(TestServer *s, size_t count)
{
gint64 end_time;
g_mutex_lock(&s->data_mutex);
end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
while (ctpop64(s->rings) != count) {
if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
/* timeout has passed */
g_assert_cmpint(ctpop64(s->rings), ==, count);
break;
}
}
g_mutex_unlock(&s->data_mutex);
}
static gboolean
reconnect_cb(gpointer user_data)
{
TestServer *s = user_data;
qemu_chr_disconnect(s->chr);
return FALSE;
}
static gpointer
connect_thread(gpointer data)
{
TestServer *s = data;
/* wait for qemu to start before first try, to avoid extra warnings */
g_usleep(G_USEC_PER_SEC);
test_server_connect(s);
return NULL;
}
static void test_reconnect_subprocess(void)
{
TestServer *s = test_server_new("reconnect");
char *cmd;
g_thread_new("connect", connect_thread, s);
cmd = GET_QEMU_CMDE(s, 2, ",server", "");
qtest_start(cmd);
g_free(cmd);
wait_for_fds(s);
wait_for_rings_started(s, 2);
/* reconnect */
s->fds_num = 0;
s->rings = 0;
g_idle_add(reconnect_cb, s);
wait_for_fds(s);
wait_for_rings_started(s, 2);
qtest_end();
test_server_free(s);
return;
}
static void test_reconnect(void)
{
gchar *path = g_strdup_printf("/%s/vhost-user/reconnect/subprocess",
qtest_get_arch());
g_test_trap_subprocess(path, 0, 0);
g_test_trap_assert_passed();
}
#endif
int main(int argc, char **argv)
{
QTestState *s = NULL;
@ -635,6 +731,7 @@ int main(int argc, char **argv)
}
server = test_server_new("test");
test_server_listen(server);
loop = g_main_loop_new(NULL, FALSE);
/* run the main loop thread so the chardev may operate */
@ -647,6 +744,11 @@ int main(int argc, char **argv)
qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
qtest_add_func("/vhost-user/migrate", test_migrate);
#ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
qtest_add_func("/vhost-user/reconnect/subprocess",
test_reconnect_subprocess);
qtest_add_func("/vhost-user/reconnect", test_reconnect);
#endif
ret = g_test_run();