static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
{
unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
qtest_quit(from);
if (test_dest) {
qtest_memread(to, start_address, &dest_byte_a, 1);
/* Destination still running, wait for a byte to change */
do {
qtest_memread(to, start_address, &dest_byte_b, 1);
usleep(1000 * 10);
} while (dest_byte_a == dest_byte_b);
qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
/* With it stopped, check nothing changes */
qtest_memread(to, start_address, &dest_byte_c, 1);
usleep(1000 * 200);
qtest_memread(to, start_address, &dest_byte_d, 1);
g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
check_guests_ram(to);
}
qtest_quit(to);
cleanup("bootsect");
cleanup("migsocket");
cleanup("src_serial");
cleanup("dest_serial");
}
static void check_guests_ram(void)
{
/* Our ASM test will have been incrementing one byte from each page from
* 1MB to <100MB in order.
* This gives us a constraint that any page's byte should be equal or less
* than the previous pages byte (mod 256); and they should all be equal
* except for one transition at the point where we meet the incrementer.
* (We're running this with the guest stopped).
*/
unsigned address;
uint8_t first_byte;
uint8_t last_byte;
bool hit_edge = false;
bool bad = false;
qtest_memread(global_qtest, start_address, &first_byte, 1);
last_byte = first_byte;
for (address = start_address + 4096; address < end_address; address += 4096)
{
uint8_t b;
qtest_memread(global_qtest, address, &b, 1);
if (b != last_byte) {
if (((b + 1) % 256) == last_byte && !hit_edge) {
/* This is OK, the guest stopped at the point of
* incrementing the previous page but didn't get
* to us yet.
*/
hit_edge = true;
} else {
fprintf(stderr, "Memory content inconsistency at %x"
" first_byte = %x last_byte = %x current = %x"
" hit_edge = %x\n",
address, first_byte, last_byte, b, hit_edge);
bad = true;
}
}
last_byte = b;
}
g_assert_false(bad);
}
static void qpci_pc_memread(QPCIBus *bus, uint32_t addr, void *buf, size_t len)
{
qtest_memread(bus->qts, addr, buf, len);
}
static void test_migrate(void)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *global = global_qtest, *from, *to;
unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
gchar *cmd, *cmd_src, *cmd_dst;
QDict *rsp;
char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
const char *arch = qtest_get_arch();
got_stop = false;
if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
init_bootfile_x86(bootpath);
cmd_src = g_strdup_printf("-machine accel=kvm:tcg -m 150M"
" -name pcsource,debug-threads=on"
" -serial file:%s/src_serial"
" -drive file=%s,format=raw",
tmpfs, bootpath);
cmd_dst = g_strdup_printf("-machine accel=kvm:tcg -m 150M"
" -name pcdest,debug-threads=on"
" -serial file:%s/dest_serial"
" -drive file=%s,format=raw"
" -incoming %s",
tmpfs, bootpath, uri);
} else if (strcmp(arch, "ppc64") == 0) {
init_bootfile_ppc(bootpath);
cmd_src = g_strdup_printf("-machine accel=kvm:tcg -m 256M"
" -name pcsource,debug-threads=on"
" -serial file:%s/src_serial"
" -drive file=%s,if=pflash,format=raw",
tmpfs, bootpath);
cmd_dst = g_strdup_printf("-machine accel=kvm:tcg -m 256M"
" -name pcdest,debug-threads=on"
" -serial file:%s/dest_serial"
" -incoming %s",
tmpfs, uri);
} else {
g_assert_not_reached();
}
g_free(bootpath);
from = qtest_start(cmd_src);
g_free(cmd_src);
to = qtest_init(cmd_dst);
g_free(cmd_dst);
global_qtest = from;
rsp = qmp("{ 'execute': 'migrate-set-capabilities',"
"'arguments': { "
"'capabilities': [ {"
"'capability': 'postcopy-ram',"
"'state': true } ] } }");
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
global_qtest = to;
rsp = qmp("{ 'execute': 'migrate-set-capabilities',"
"'arguments': { "
"'capabilities': [ {"
"'capability': 'postcopy-ram',"
"'state': true } ] } }");
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
/* We want to pick a speed slow enough that the test completes
* quickly, but that it doesn't complete precopy even on a slow
* machine, so also set the downtime.
*/
global_qtest = from;
rsp = qmp("{ 'execute': 'migrate_set_speed',"
"'arguments': { 'value': 100000000 } }");
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
/* 1ms downtime - it should never finish precopy */
rsp = qmp("{ 'execute': 'migrate_set_downtime',"
"'arguments': { 'value': 0.001 } }");
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
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_migration_pass();
rsp = return_or_event(qmp("{ 'execute': 'migrate-start-postcopy' }"));
g_assert(qdict_haskey(rsp, "return"));
QDECREF(rsp);
if (!got_stop) {
qmp_eventwait("STOP");
}
global_qtest = to;
qmp_eventwait("RESUME");
wait_for_serial("dest_serial");
global_qtest = from;
wait_for_migration_complete();
qtest_quit(from);
global_qtest = to;
qtest_memread(to, start_address, &dest_byte_a, 1);
/* Destination still running, wait for a byte to change */
do {
qtest_memread(to, start_address, &dest_byte_b, 1);
usleep(10 * 1000);
} while (dest_byte_a == dest_byte_b);
qmp("{ 'execute' : 'stop'}");
/* With it stopped, check nothing changes */
qtest_memread(to, start_address, &dest_byte_c, 1);
sleep(1);
qtest_memread(to, start_address, &dest_byte_d, 1);
g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
check_guests_ram();
qtest_quit(to);
g_free(uri);
global_qtest = global;
cleanup("bootsect");
cleanup("migsocket");
cleanup("src_serial");
cleanup("dest_serial");
}