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qemu / qemu / aeb7a330f46ba530b40d7be5a3dce44e552f79a9 / . / tests / migration-test.c
blob: ebd77a581affd8872138f6f36d5eb2c1876d3539 [file] [log] [blame]
/*
* QTest testcase for migration
*
* Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
* based on the vhost-user-test.c that is:
* Copyright (c) 2014 Virtual Open Systems Sarl.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "libqtest.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "qemu/range.h"
#include "qemu/sockets.h"
#include "chardev/char.h"
#include "qapi/qapi-visit-sockets.h"
#include "qapi/qobject-input-visitor.h"
#include "qapi/qobject-output-visitor.h"
#include "migration/migration-test.h"
/* TODO actually test the results and get rid of this */
#define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__))
unsigned start_address;
unsigned end_address;
bool got_stop;
static bool uffd_feature_thread_id;
#if defined(__linux__)
#include <sys/syscall.h>
#include <sys/vfs.h>
#endif
#if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
#include <sys/eventfd.h>
#include <sys/ioctl.h>
#include <linux/userfaultfd.h>
static bool ufd_version_check(void)
{
struct uffdio_api api_struct;
uint64_t ioctl_mask;
int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
if (ufd == -1) {
g_test_message("Skipping test: userfaultfd not available");
return false;
}
api_struct.api = UFFD_API;
api_struct.features = 0;
if (ioctl(ufd, UFFDIO_API, &api_struct)) {
g_test_message("Skipping test: UFFDIO_API failed");
return false;
}
uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
(__u64)1 << _UFFDIO_UNREGISTER;
if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
g_test_message("Skipping test: Missing userfault feature");
return false;
}
return true;
}
#else
static bool ufd_version_check(void)
{
g_test_message("Skipping test: Userfault not available (builtdtime)");
return false;
}
#endif
static const char *tmpfs;
/* The boot file modifies memory area in [start_address, end_address)
* repeatedly. It outputs a 'B' at a fixed rate while it's still running.
*/
#include "tests/migration/i386/a-b-bootblock.h"
#include "tests/migration/aarch64/a-b-kernel.h"
#include "tests/migration/s390x/a-b-bios.h"
static void init_bootfile(const char *bootpath, void *content, size_t len)
{
FILE *bootfile = fopen(bootpath, "wb");
g_assert_cmpint(fwrite(content, len, 1, bootfile), ==, 1);
fclose(bootfile);
}
/*
* Wait for some output in the serial output file,
* we get an 'A' followed by an endless string of 'B's
* but on the destination we won't have the A.
*/
static void wait_for_serial(const char *side)
{
char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
FILE *serialfile = fopen(serialpath, "r");
const char *arch = qtest_get_arch();
int started = (strcmp(side, "src_serial") == 0 &&
strcmp(arch, "ppc64") == 0) ? 0 : 1;
g_free(serialpath);
do {
int readvalue = fgetc(serialfile);
if (!started) {
/* SLOF prints its banner before starting test,
* to ignore it, mark the start of the test with '_',
* ignore all characters until this marker
*/
switch (readvalue) {
case '_':
started = 1;
break;
case EOF:
fseek(serialfile, 0, SEEK_SET);
usleep(1000);
break;
}
continue;
}
switch (readvalue) {
case 'A':
/* Fine */
break;
case 'B':
/* It's alive! */
fclose(serialfile);
return;
case EOF:
started = (strcmp(side, "src_serial") == 0 &&
strcmp(arch, "ppc64") == 0) ? 0 : 1;
fseek(serialfile, 0, SEEK_SET);
usleep(1000);
break;
default:
fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
g_assert_not_reached();
}
} while (true);
}
static void stop_cb(void *opaque, const char *name, QDict *data)
{
if (!strcmp(name, "STOP")) {
got_stop = true;
}
}
/*
* Events can get in the way of responses we are actually waiting for.
*/
GCC_FMT_ATTR(3, 4)
static QDict *wait_command_fd(QTestState *who, int fd, const char *command, ...)
{
va_list ap;
va_start(ap, command);
qtest_qmp_vsend_fds(who, &fd, 1, command, ap);
va_end(ap);
return qtest_qmp_receive_success(who, stop_cb, NULL);
}
/*
* Events can get in the way of responses we are actually waiting for.
*/
GCC_FMT_ATTR(2, 3)
static QDict *wait_command(QTestState *who, const char *command, ...)
{
va_list ap;
va_start(ap, command);
qtest_qmp_vsend(who, command, ap);
va_end(ap);
return qtest_qmp_receive_success(who, stop_cb, NULL);
}
/*
* Note: caller is responsible to free the returned object via
* qobject_unref() after use
*/
static QDict *migrate_query(QTestState *who)
{
return wait_command(who, "{ 'execute': 'query-migrate' }");
}
/*
* Note: caller is responsible to free the returned object via
* g_free() after use
*/
static gchar *migrate_query_status(QTestState *who)
{
QDict *rsp_return = migrate_query(who);
gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
g_assert(status);
qobject_unref(rsp_return);
return status;
}
/*
* It's tricky to use qemu's migration event capability with qtest,
* events suddenly appearing confuse the qmp()/hmp() responses.
*/
static int64_t read_ram_property_int(QTestState *who, const char *property)
{
QDict *rsp_return, *rsp_ram;
int64_t result;
rsp_return = migrate_query(who);
if (!qdict_haskey(rsp_return, "ram")) {
/* Still in setup */
result = 0;
} else {
rsp_ram = qdict_get_qdict(rsp_return, "ram");
result = qdict_get_try_int(rsp_ram, property, 0);
}
qobject_unref(rsp_return);
return result;
}
static int64_t read_migrate_property_int(QTestState *who, const char *property)
{
QDict *rsp_return;
int64_t result;
rsp_return = migrate_query(who);
result = qdict_get_try_int(rsp_return, property, 0);
qobject_unref(rsp_return);
return result;
}
static uint64_t get_migration_pass(QTestState *who)
{
return read_ram_property_int(who, "dirty-sync-count");
}
static void read_blocktime(QTestState *who)
{
QDict *rsp_return;
rsp_return = migrate_query(who);
g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
qobject_unref(rsp_return);
}
static bool check_migration_status(QTestState *who, const char *goal,
const char **ungoals)
{
bool ready;
char *current_status;
const char **ungoal;
current_status = migrate_query_status(who);
ready = strcmp(current_status, goal) == 0;
if (!ungoals) {
g_assert_cmpstr(current_status, !=, "failed");
/*
* If looking for a state other than completed,
* completion of migration would cause the test to
* hang.
*/
if (strcmp(goal, "completed") != 0) {
g_assert_cmpstr(current_status, !=, "completed");
}
} else {
for (ungoal = ungoals; *ungoal; ungoal++) {
g_assert_cmpstr(current_status, !=, *ungoal);
}
}
g_free(current_status);
return ready;
}
static void wait_for_migration_status(QTestState *who,
const char *goal,
const char **ungoals)
{
while (!check_migration_status(who, goal, ungoals)) {
usleep(1000);
}
}
static void wait_for_migration_complete(QTestState *who)
{
wait_for_migration_status(who, "completed", NULL);
}
static void wait_for_migration_pass(QTestState *who)
{
uint64_t initial_pass = get_migration_pass(who);
uint64_t pass;
/* Wait for the 1st sync */
while (!got_stop && !initial_pass) {
usleep(1000);
initial_pass = get_migration_pass(who);
}
do {
usleep(1000);
pass = get_migration_pass(who);
} while (pass == initial_pass && !got_stop);
}
static void check_guests_ram(QTestState *who)
{
/* Our ASM test will have been incrementing one byte from each page from
* start_address to < end_address 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;
int bad = 0;
qtest_memread(who, start_address, &first_byte, 1);
last_byte = first_byte;
for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
address += TEST_MEM_PAGE_SIZE)
{
uint8_t b;
qtest_memread(who, 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;
last_byte = b;
} else {
bad++;
if (bad <= 10) {
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);
}
}
}
}
if (bad >= 10) {
fprintf(stderr, "and in another %d pages", bad - 10);
}
g_assert(bad == 0);
}
static void cleanup(const char *filename)
{
char *path = g_strdup_printf("%s/%s", tmpfs, filename);
unlink(path);
g_free(path);
}
static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
{
return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
",mem-path=%s,share=on -numa node,memdev=mem0",
mem_size, shmem_path);
}
static char *SocketAddress_to_str(SocketAddress *addr)
{
switch (addr->type) {
case SOCKET_ADDRESS_TYPE_INET:
return g_strdup_printf("tcp:%s:%s",
addr->u.inet.host,
addr->u.inet.port);
case SOCKET_ADDRESS_TYPE_UNIX:
return g_strdup_printf("unix:%s",
addr->u.q_unix.path);
case SOCKET_ADDRESS_TYPE_FD:
return g_strdup_printf("fd:%s", addr->u.fd.str);
case SOCKET_ADDRESS_TYPE_VSOCK:
return g_strdup_printf("tcp:%s:%s",
addr->u.vsock.cid,
addr->u.vsock.port);
default:
return g_strdup("unknown address type");
}
}
static char *migrate_get_socket_address(QTestState *who, const char *parameter)
{
QDict *rsp;
char *result;
Error *local_err = NULL;
SocketAddressList *addrs;
Visitor *iv = NULL;
QObject *object;
rsp = migrate_query(who);
object = qdict_get(rsp, parameter);
iv = qobject_input_visitor_new(object);
visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
visit_free(iv);
/* we are only using a single address */
result = SocketAddress_to_str(addrs->value);
qapi_free_SocketAddressList(addrs);
qobject_unref(rsp);
return result;
}
static long long migrate_get_parameter_int(QTestState *who,
const char *parameter)
{
QDict *rsp;
long long result;
rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
result = qdict_get_int(rsp, parameter);
qobject_unref(rsp);
return result;
}
static void migrate_check_parameter_int(QTestState *who, const char *parameter,
long long value)
{
long long result;
result = migrate_get_parameter_int(who, parameter);
g_assert_cmpint(result, ==, value);
}
static void migrate_set_parameter_int(QTestState *who, const char *parameter,
long long value)
{
QDict *rsp;
rsp = qtest_qmp(who,
"{ 'execute': 'migrate-set-parameters',"
"'arguments': { %s: %lld } }",
parameter, value);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
migrate_check_parameter_int(who, parameter, value);
}
static void migrate_pause(QTestState *who)
{
QDict *rsp;
rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
qobject_unref(rsp);
}
static void migrate_continue(QTestState *who, const char *state)
{
QDict *rsp;
rsp = wait_command(who,
"{ 'execute': 'migrate-continue',"
" 'arguments': { 'state': %s } }",
state);
qobject_unref(rsp);
}
static void migrate_recover(QTestState *who, const char *uri)
{
QDict *rsp;
rsp = wait_command(who,
"{ 'execute': 'migrate-recover', "
" 'id': 'recover-cmd', "
" 'arguments': { 'uri': %s } }",
uri);
qobject_unref(rsp);
}
static void migrate_set_capability(QTestState *who, const char *capability,
bool value)
{
QDict *rsp;
rsp = qtest_qmp(who,
"{ 'execute': 'migrate-set-capabilities',"
"'arguments': { "
"'capabilities': [ { "
"'capability': %s, 'state': %i } ] } }",
capability, value);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
}
/*
* Send QMP command "migrate".
* Arguments are built from @fmt... (formatted like
* qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
*/
GCC_FMT_ATTR(3, 4)
static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
{
va_list ap;
QDict *args, *rsp;
va_start(ap, fmt);
args = qdict_from_vjsonf_nofail(fmt, ap);
va_end(ap);
g_assert(!qdict_haskey(args, "uri"));
qdict_put_str(args, "uri", uri);
rsp = qtest_qmp(who, "{ 'execute': 'migrate', 'arguments': %p}", args);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
}
static void migrate_postcopy_start(QTestState *from, QTestState *to)
{
QDict *rsp;
rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
qobject_unref(rsp);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
}
static int test_migrate_start(QTestState **from, QTestState **to,
const char *uri, bool hide_stderr,
bool use_shmem, const char *opts_src,
const char *opts_dst)
{
gchar *cmd_src, *cmd_dst;
char *bootpath = NULL;
char *extra_opts = NULL;
char *shmem_path = NULL;
const char *arch = qtest_get_arch();
const char *accel = "kvm:tcg";
opts_src = opts_src ? opts_src : "";
opts_dst = opts_dst ? opts_dst : "";
if (use_shmem) {
if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
g_test_skip("/dev/shm is not supported");
return -1;
}
shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
}
got_stop = false;
bootpath = g_strdup_printf("%s/bootsect", tmpfs);
if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
/* the assembled x86 boot sector should be exactly one sector large */
assert(sizeof(x86_bootsect) == 512);
init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
" -name source,debug-threads=on"
" -serial file:%s/src_serial"
" -drive file=%s,format=raw %s %s",
accel, tmpfs, bootpath,
extra_opts ? extra_opts : "", opts_src);
cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
" -name target,debug-threads=on"
" -serial file:%s/dest_serial"
" -drive file=%s,format=raw"
" -incoming %s %s %s",
accel, tmpfs, bootpath, uri,
extra_opts ? extra_opts : "", opts_dst);
start_address = X86_TEST_MEM_START;
end_address = X86_TEST_MEM_END;
} else if (g_str_equal(arch, "s390x")) {
init_bootfile(bootpath, s390x_elf, sizeof(s390x_elf));
extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
" -name source,debug-threads=on"
" -serial file:%s/src_serial -bios %s %s %s",
accel, tmpfs, bootpath,
extra_opts ? extra_opts : "", opts_src);
cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
" -name target,debug-threads=on"
" -serial file:%s/dest_serial -bios %s"
" -incoming %s %s %s",
accel, tmpfs, bootpath, uri,
extra_opts ? extra_opts : "", opts_dst);
start_address = S390_TEST_MEM_START;
end_address = S390_TEST_MEM_END;
} else if (strcmp(arch, "ppc64") == 0) {
extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine accel=%s,vsmt=8 -m 256M -nodefaults"
" -name source,debug-threads=on"
" -serial file:%s/src_serial"
" -prom-env 'use-nvramrc?=true' -prom-env "
"'nvramrc=hex .\" _\" begin %x %x "
"do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
"until' %s %s", accel, tmpfs, end_address,
start_address, extra_opts ? extra_opts : "",
opts_src);
cmd_dst = g_strdup_printf("-machine accel=%s,vsmt=8 -m 256M"
" -name target,debug-threads=on"
" -serial file:%s/dest_serial"
" -incoming %s %s %s",
accel, tmpfs, uri,
extra_opts ? extra_opts : "", opts_dst);
start_address = PPC_TEST_MEM_START;
end_address = PPC_TEST_MEM_END;
} else if (strcmp(arch, "aarch64") == 0) {
init_bootfile(bootpath, aarch64_kernel, sizeof(aarch64_kernel));
extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
"-name vmsource,debug-threads=on -cpu max "
"-m 150M -serial file:%s/src_serial "
"-kernel %s %s %s",
accel, tmpfs, bootpath,
extra_opts ? extra_opts : "", opts_src);
cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
"-name vmdest,debug-threads=on -cpu max "
"-m 150M -serial file:%s/dest_serial "
"-kernel %s "
"-incoming %s %s %s",
accel, tmpfs, bootpath, uri,
extra_opts ? extra_opts : "", opts_dst);
start_address = ARM_TEST_MEM_START;
end_address = ARM_TEST_MEM_END;
g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
} else {
g_assert_not_reached();
}
g_free(bootpath);
g_free(extra_opts);
if (hide_stderr) {
gchar *tmp;
tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
g_free(cmd_src);
cmd_src = tmp;
tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
g_free(cmd_dst);
cmd_dst = tmp;
}
*from = qtest_init(cmd_src);
g_free(cmd_src);
*to = qtest_init(cmd_dst);
g_free(cmd_dst);
/*
* Remove shmem file immediately to avoid memory leak in test failed case.
* It's valid becase QEMU has already opened this file
*/
if (use_shmem) {
unlink(shmem_path);
g_free(shmem_path);
}
return 0;
}
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 deprecated_set_downtime(QTestState *who, const double value)
{
QDict *rsp;
rsp = qtest_qmp(who,
"{ 'execute': 'migrate_set_downtime',"
" 'arguments': { 'value': %f } }", value);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
migrate_check_parameter_int(who, "downtime-limit", value * 1000);
}
static void deprecated_set_speed(QTestState *who, long long value)
{
QDict *rsp;
rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
"'arguments': { 'value': %lld } }", value);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
migrate_check_parameter_int(who, "max-bandwidth", value);
}
static void deprecated_set_cache_size(QTestState *who, long long value)
{
QDict *rsp;
rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
"'arguments': { 'value': %lld } }", value);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(rsp);
migrate_check_parameter_int(who, "xbzrle-cache-size", value);
}
static void test_deprecated(void)
{
QTestState *from;
from = qtest_init("-machine none");
deprecated_set_downtime(from, 0.12345);
deprecated_set_speed(from, 12345);
deprecated_set_cache_size(from, 4096);
qtest_quit(from);
}
static int migrate_postcopy_prepare(QTestState **from_ptr,
QTestState **to_ptr,
bool hide_error)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, hide_error, false, NULL, NULL)) {
return -1;
}
migrate_set_capability(from, "postcopy-ram", true);
migrate_set_capability(to, "postcopy-ram", true);
migrate_set_capability(to, "postcopy-blocktime", true);
/* 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.
*/
migrate_set_parameter_int(from, "max-bandwidth", 30000000);
migrate_set_parameter_int(from, "downtime-limit", 1);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
g_free(uri);
wait_for_migration_pass(from);
*from_ptr = from;
*to_ptr = to;
return 0;
}
static void migrate_postcopy_complete(QTestState *from, QTestState *to)
{
wait_for_migration_complete(from);
/* Make sure we get at least one "B" on destination */
wait_for_serial("dest_serial");
if (uffd_feature_thread_id) {
read_blocktime(to);
}
test_migrate_end(from, to, true);
}
static void test_postcopy(void)
{
QTestState *from, *to;
if (migrate_postcopy_prepare(&from, &to, false)) {
return;
}
migrate_postcopy_start(from, to);
migrate_postcopy_complete(from, to);
}
static void test_postcopy_recovery(void)
{
QTestState *from, *to;
char *uri;
if (migrate_postcopy_prepare(&from, &to, true)) {
return;
}
/* Turn postcopy speed down, 4K/s is slow enough on any machines */
migrate_set_parameter_int(from, "max-postcopy-bandwidth", 4096);
/* Now we start the postcopy */
migrate_postcopy_start(from, to);
/*
* Wait until postcopy is really started; we can only run the
* migrate-pause command during a postcopy
*/
wait_for_migration_status(from, "postcopy-active", NULL);
/*
* Manually stop the postcopy migration. This emulates a network
* failure with the migration socket
*/
migrate_pause(from);
/*
* Wait for destination side to reach postcopy-paused state. The
* migrate-recover command can only succeed if destination machine
* is in the paused state
*/
wait_for_migration_status(to, "postcopy-paused",
(const char * []) { "failed", "active",
"completed", NULL });
/*
* Create a new socket to emulate a new channel that is different
* from the broken migration channel; tell the destination to
* listen to the new port
*/
uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
migrate_recover(to, uri);
/*
* Try to rebuild the migration channel using the resume flag and
* the newly created channel
*/
wait_for_migration_status(from, "postcopy-paused",
(const char * []) { "failed", "active",
"completed", NULL });
migrate(from, uri, "{'resume': true}");
g_free(uri);
/* Restore the postcopy bandwidth to unlimited */
migrate_set_parameter_int(from, "max-postcopy-bandwidth", 0);
migrate_postcopy_complete(from, to);
}
static void wait_for_migration_fail(QTestState *from, bool allow_active)
{
QDict *rsp_return;
char *status;
bool failed;
do {
status = migrate_query_status(from);
bool result = !strcmp(status, "setup") || !strcmp(status, "failed") ||
(allow_active && !strcmp(status, "active"));
if (!result) {
fprintf(stderr, "%s: unexpected status status=%s allow_active=%d\n",
__func__, status, allow_active);
}
g_assert(result);
failed = !strcmp(status, "failed");
g_free(status);
} while (!failed);
/* Is the machine currently running? */
rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
g_assert(qdict_haskey(rsp_return, "running"));
g_assert(qdict_get_bool(rsp_return, "running"));
qobject_unref(rsp_return);
}
static void test_baddest(void)
{
QTestState *from, *to;
if (test_migrate_start(&from, &to, "tcp:0:0", true, false, NULL, NULL)) {
return;
}
migrate(from, "tcp:0:0", "{}");
wait_for_migration_fail(from, false);
test_migrate_end(from, to, false);
}
static void test_precopy_unix(void)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
return;
}
/* 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.
*/
/* 1 ms should make it not converge*/
migrate_set_parameter_int(from, "downtime-limit", 1);
/* 1GB/s */
migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
wait_for_migration_pass(from);
/* 300 ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
test_migrate_end(from, to, true);
g_free(uri);
}
#if 0
/* Currently upset on aarch64 TCG */
static void test_ignore_shared(void)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, false, true, NULL, NULL)) {
return;
}
migrate_set_capability(from, "x-ignore-shared", true);
migrate_set_capability(to, "x-ignore-shared", true);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
wait_for_migration_pass(from);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
/* Check whether shared RAM has been really skipped */
g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
test_migrate_end(from, to, true);
g_free(uri);
}
#endif
static void test_xbzrle(const char *uri)
{
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
return;
}
/*
* 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.
*/
/* 1 ms should make it not converge*/
migrate_set_parameter_int(from, "downtime-limit", 1);
/* 1GB/s */
migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
migrate_set_parameter_int(from, "xbzrle-cache-size", 33554432);
migrate_set_capability(from, "xbzrle", "true");
migrate_set_capability(to, "xbzrle", "true");
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
test_migrate_end(from, to, true);
}
static void test_xbzrle_unix(void)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
test_xbzrle(uri);
g_free(uri);
}
static void test_precopy_tcp(void)
{
char *uri;
QTestState *from, *to;
if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false,
NULL, NULL)) {
return;
}
/*
* 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.
*/
/* 1 ms should make it not converge*/
migrate_set_parameter_int(from, "downtime-limit", 1);
/* 1GB/s */
migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
uri = migrate_get_socket_address(to, "socket-address");
migrate(from, uri, "{}");
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
test_migrate_end(from, to, true);
g_free(uri);
}
static void test_migrate_fd_proto(void)
{
QTestState *from, *to;
int ret;
int pair[2];
QDict *rsp;
const char *error_desc;
if (test_migrate_start(&from, &to, "defer", false, false, NULL, NULL)) {
return;
}
/*
* 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.
*/
/* 1 ms should make it not converge */
migrate_set_parameter_int(from, "downtime-limit", 1);
/* 1GB/s */
migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
/* Create two connected sockets for migration */
ret = socketpair(PF_LOCAL, SOCK_STREAM, 0, pair);
g_assert_cmpint(ret, ==, 0);
/* Send the 1st socket to the target */
rsp = wait_command_fd(to, pair[0],
"{ 'execute': 'getfd',"
" 'arguments': { 'fdname': 'fd-mig' }}");
qobject_unref(rsp);
close(pair[0]);
/* Start incoming migration from the 1st socket */
rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
" 'arguments': { 'uri': 'fd:fd-mig' }}");
qobject_unref(rsp);
/* Send the 2nd socket to the target */
rsp = wait_command_fd(from, pair[1],
"{ 'execute': 'getfd',"
" 'arguments': { 'fdname': 'fd-mig' }}");
qobject_unref(rsp);
close(pair[1]);
/* Start migration to the 2nd socket*/
migrate(from, "fd:fd-mig", "{}");
wait_for_migration_pass(from);
/* 300ms should converge */
migrate_set_parameter_int(from, "downtime-limit", 300);
if (!got_stop) {
qtest_qmp_eventwait(from, "STOP");
}
qtest_qmp_eventwait(to, "RESUME");
/* Test closing fds */
/* We assume, that QEMU removes named fd from its list,
* so this should fail */
rsp = qtest_qmp(from, "{ 'execute': 'closefd',"
" 'arguments': { 'fdname': 'fd-mig' }}");
g_assert_true(qdict_haskey(rsp, "error"));
error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
qobject_unref(rsp);
rsp = qtest_qmp(to, "{ 'execute': 'closefd',"
" 'arguments': { 'fdname': 'fd-mig' }}");
g_assert_true(qdict_haskey(rsp, "error"));
error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
qobject_unref(rsp);
/* Complete migration */
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
test_migrate_end(from, to, true);
}
static void do_test_validate_uuid(const char *uuid_arg_src,
const char *uuid_arg_dst,
bool should_fail, bool hide_stderr)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
if (test_migrate_start(&from, &to, uri, hide_stderr, false,
uuid_arg_src, uuid_arg_dst)) {
return;
}
/*
* UUID validation is at the begin of migration. So, the main process of
* migration is not interesting for us here. Thus, set huge downtime for
* very fast migration.
*/
migrate_set_parameter_int(from, "downtime-limit", 1000000);
migrate_set_capability(from, "validate-uuid", true);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
if (should_fail) {
qtest_set_expected_status(to, 1);
wait_for_migration_fail(from, true);
} else {
wait_for_migration_complete(from);
}
test_migrate_end(from, to, false);
g_free(uri);
}
static void test_validate_uuid(void)
{
do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111",
"-uuid 11111111-1111-1111-1111-111111111111",
false, false);
}
static void test_validate_uuid_error(void)
{
do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111",
"-uuid 22222222-2222-2222-2222-222222222222",
true, true);
}
static void test_validate_uuid_src_not_set(void)
{
do_test_validate_uuid(NULL, "-uuid 11111111-1111-1111-1111-111111111111",
false, true);
}
static void test_validate_uuid_dst_not_set(void)
{
do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111", NULL,
false, true);
}
static void test_migrate_auto_converge(void)
{
char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
QTestState *from, *to;
int64_t remaining, percentage;
/*
* We want the test to be stable and as fast as possible.
* E.g., with 1Gb/s bandwith migration may pass without throttling,
* so we need to decrease a bandwidth.
*/
const int64_t init_pct = 5, inc_pct = 50, max_pct = 95;
const int64_t max_bandwidth = 400000000; /* ~400Mb/s */
const int64_t downtime_limit = 250; /* 250ms */
/*
* We migrate through unix-socket (> 500Mb/s).
* Thus, expected migration speed ~= bandwidth limit (< 500Mb/s).
* So, we can predict expected_threshold
*/
const int64_t expected_threshold = max_bandwidth * downtime_limit / 1000;
if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
return;
}
migrate_set_capability(from, "auto-converge", true);
migrate_set_parameter_int(from, "cpu-throttle-initial", init_pct);
migrate_set_parameter_int(from, "cpu-throttle-increment", inc_pct);
migrate_set_parameter_int(from, "max-cpu-throttle", max_pct);
/*
* Set the initial parameters so that the migration could not converge
* without throttling.
*/
migrate_set_parameter_int(from, "downtime-limit", 1);
migrate_set_parameter_int(from, "max-bandwidth", 100000000); /* ~100Mb/s */
/* To check remaining size after precopy */
migrate_set_capability(from, "pause-before-switchover", true);
/* Wait for the first serial output from the source */
wait_for_serial("src_serial");
migrate(from, uri, "{}");
/* Wait for throttling begins */
percentage = 0;
while (percentage == 0) {
percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
usleep(100);
g_assert_false(got_stop);
}
/* The first percentage of throttling should be equal to init_pct */
g_assert_cmpint(percentage, ==, init_pct);
/* Now, when we tested that throttling works, let it converge */
migrate_set_parameter_int(from, "downtime-limit", downtime_limit);
migrate_set_parameter_int(from, "max-bandwidth", max_bandwidth);
/*
* Wait for pre-switchover status to check last throttle percentage
* and remaining. These values will be zeroed later
*/
wait_for_migration_status(from, "pre-switchover", NULL);
/* The final percentage of throttling shouldn't be greater than max_pct */
percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
g_assert_cmpint(percentage, <=, max_pct);
remaining = read_ram_property_int(from, "remaining");
g_assert_cmpint(remaining, <, expected_threshold);
migrate_continue(from, "pre-switchover");
qtest_qmp_eventwait(to, "RESUME");
wait_for_serial("dest_serial");
wait_for_migration_complete(from);
g_free(uri);
test_migrate_end(from, to, true);
}
int main(int argc, char **argv)
{
char template[] = "/tmp/migration-test-XXXXXX";
int ret;
g_test_init(&argc, &argv, NULL);
if (!ufd_version_check()) {
return g_test_run();
}
/*
* On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
* is touchy due to race conditions on dirty bits (especially on PPC for
* some reason)
*/
if (g_str_equal(qtest_get_arch(), "ppc64") &&
access("/sys/module/kvm_hv", F_OK)) {
g_test_message("Skipping test: kvm_hv not available");
return g_test_run();
}
/*
* Similar to ppc64, s390x seems to be touchy with TCG, so disable it
* there until the problems are resolved
*/
if (g_str_equal(qtest_get_arch(), "s390x")) {
#if defined(HOST_S390X)
if (access("/dev/kvm", R_OK | W_OK)) {
g_test_message("Skipping test: kvm not available");
return g_test_run();
}
#else
g_test_message("Skipping test: Need s390x host to work properly");
return g_test_run();
#endif
}
tmpfs = mkdtemp(template);
if (!tmpfs) {
g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
}
g_assert(tmpfs);
module_call_init(MODULE_INIT_QOM);
qtest_add_func("/migration/postcopy/unix", test_postcopy);
qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
qtest_add_func("/migration/deprecated", test_deprecated);
qtest_add_func("/migration/bad_dest", test_baddest);
qtest_add_func("/migration/precopy/unix", test_precopy_unix);
qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
/* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
qtest_add_func("/migration/fd_proto", test_migrate_fd_proto);
qtest_add_func("/migration/validate_uuid", test_validate_uuid);
qtest_add_func("/migration/validate_uuid_error", test_validate_uuid_error);
qtest_add_func("/migration/validate_uuid_src_not_set",
test_validate_uuid_src_not_set);
qtest_add_func("/migration/validate_uuid_dst_not_set",
test_validate_uuid_dst_not_set);
qtest_add_func("/migration/auto_converge", test_migrate_auto_converge);
ret = g_test_run();
g_assert_cmpint(ret, ==, 0);
ret = rmdir(tmpfs);
if (ret != 0) {
g_test_message("unable to rmdir: path (%s): %s",
tmpfs, strerror(errno));
}
return ret;
}