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vhost-user-test: add live-migration test 

This test checks that the log fd is given to the migration source, and
mark dirty pages during migration.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
This commit is contained in:
Marc-André Lureau 2015-10-09 17:17:39 +02:00 committed by Michael S. Tsirkin
parent 704b216887
commit b181974724
1 changed files with 169 additions and 2 deletions
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171
tests/vhost-user-test.c
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@ -12,6 +12,7 @@
#include "libqtest.h"
#include "qemu/option.h"
#include "qemu/range.h"
#include "sysemu/char.h"
#include "sysemu/sysemu.h"
@ -47,6 +48,9 @@
#define VHOST_MEMORY_MAX_NREGIONS 8
#define VHOST_USER_F_PROTOCOL_FEATURES 30
#define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
#define VHOST_LOG_PAGE 0x1000
typedef enum VhostUserRequest {
VHOST_USER_NONE = 0,
@ -117,6 +121,7 @@ typedef struct TestServer {
VhostUserMemory memory;
GMutex data_mutex;
GCond data_cond;
int log_fd;
} TestServer;
#if !GLIB_CHECK_VERSION(2, 32, 0)
@ -238,7 +243,8 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.u64);
msg.u64 = 0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
msg.u64 = 0x1ULL << VHOST_F_LOG_ALL |
0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
@ -252,7 +258,7 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.u64);
msg.u64 = 0;
msg.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
@ -286,6 +292,21 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
*/
qemu_set_nonblock(fd);
break;
case VHOST_USER_SET_LOG_BASE:
if (s->log_fd != -1) {
close(s->log_fd);
s->log_fd = -1;
}
qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = 0;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
g_cond_signal(&s->data_cond);
break;
default:
break;
}
@ -337,6 +358,8 @@ static TestServer *test_server_new(const gchar *name)
g_mutex_init(&server->data_mutex);
g_cond_init(&server->data_cond);
server->log_fd = -1;
return server;
}
@ -358,12 +381,155 @@ static void test_server_free(TestServer *server)
close(server->fds[i]);
}
if (server->log_fd != -1) {
close(server->log_fd);
}
unlink(server->socket_path);
g_free(server->socket_path);
g_free(server->chr_name);
g_free(server);
}
static void wait_for_log_fd(TestServer *s)
{
gint64 end_time;
g_mutex_lock(&s->data_mutex);
end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
while (s->log_fd == -1) {
if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
/* timeout has passed */
g_assert(s->log_fd != -1);
break;
}
}
g_mutex_unlock(&s->data_mutex);
}
static void write_guest_mem(TestServer *s, uint32 seed)
{
uint32_t *guest_mem;
int i, j;
size_t size;
wait_for_fds(s);
/* iterate all regions */
for (i = 0; i < s->fds_num; i++) {
/* We'll write only the region statring at 0x0 */
if (s->memory.regions[i].guest_phys_addr != 0x0) {
continue;
}
g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
size = s->memory.regions[i].memory_size +
s->memory.regions[i].mmap_offset;
guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
MAP_SHARED, s->fds[i], 0);
g_assert(guest_mem != MAP_FAILED);
guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
for (j = 0; j < 256; j++) {
guest_mem[j] = seed + j;
}
munmap(guest_mem, s->memory.regions[i].memory_size);
break;
}
}
static guint64 get_log_size(TestServer *s)
{
guint64 log_size = 0;
int i;
for (i = 0; i < s->memory.nregions; ++i) {
VhostUserMemoryRegion *reg = &s->memory.regions[i];
guint64 last = range_get_last(reg->guest_phys_addr,
reg->memory_size);
log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
}
return log_size;
}
static void test_migrate(void)
{
TestServer *s = test_server_new("src");
TestServer *dest = test_server_new("dest");
const char *uri = "tcp:127.0.0.1:1234";
QTestState *global = global_qtest, *from, *to;
gchar *cmd;
QDict *rsp;
guint8 *log;
guint64 size;
cmd = GET_QEMU_CMDE(s, 2, "");
from = qtest_start(cmd);
g_free(cmd);
wait_for_fds(s);
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);
to = qtest_init(cmd);
g_free(cmd);
/* slow down migration to have time to fiddle with log */
/* TODO: qtest could learn to break on some places */
rsp = qmp("{ 'execute': 'migrate_set_speed',"
"'arguments': { 'value': 10 } }");
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
cmd = g_strdup_printf("{ 'execute': 'migrate',"
"'arguments': { 'uri': '%s' } }",
uri);
rsp = qmp(cmd);
g_free(cmd);
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
wait_for_log_fd(s);
log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
g_assert(log != MAP_FAILED);
/* modify first page */
write_guest_mem(s, 0x42);
log[0] = 1;
munmap(log, size);
/* speed things up */
rsp = qmp("{ 'execute': 'migrate_set_speed',"
"'arguments': { 'value': 0 } }");
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
qmp_eventwait("STOP");
global_qtest = to;
qmp_eventwait("RESUME");
read_guest_mem(dest);
qtest_quit(to);
test_server_free(dest);
qtest_quit(from);
test_server_free(s);
global_qtest = global;
}
int main(int argc, char **argv)
{
QTestState *s = NULL;
@ -403,6 +569,7 @@ int main(int argc, char **argv)
g_free(qemu_cmd);
qtest_add_data_func("/vhost-user/read-guest-mem", server, read_guest_mem);
qtest_add_func("/vhost-user/migrate", test_migrate);
ret = g_test_run();