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qemu/tests/vhost-user-test.c
Paolo Bonzini 4d3f50eb48 vhost-user-test: create a temporary directory per TestServer 
This makes the tests more independent, and also the source and destination
TestServers in the migration test.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1543851204-41186-15-git-send-email-pbonzini@redhat.com>
Message-Id: <1550165756-21617-10-git-send-email-pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2019-02-21 12:28:01 -05:00

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/*
* QTest testcase for the vhost-user
*
* 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/error.h"
#include "qapi/qmp/qdict.h"
#include "qemu/config-file.h"
#include "qemu/option.h"
#include "qemu/range.h"
#include "qemu/sockets.h"
#include "chardev/char-fe.h"
#include "qemu/memfd.h"
#include "sysemu/sysemu.h"
#include "libqos/libqos.h"
#include "libqos/pci-pc.h"
#include "libqos/virtio-pci.h"
#include "libqos/malloc-pc.h"
#include "hw/virtio/virtio-net.h"
#include "standard-headers/linux/vhost_types.h"
#include "standard-headers/linux/virtio_ids.h"
#include "standard-headers/linux/virtio_net.h"
#ifdef CONFIG_LINUX
#include <sys/vfs.h>
#endif
#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_MEMFD " -m %d -object memory-backend-memfd,id=mem,size=%dM," \
" -numa node,memdev=mem"
#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"
#define HUGETLBFS_MAGIC 0x958458f6
/*********** FROM hw/virtio/vhost-user.c *************************************/
#define VHOST_MEMORY_MAX_NREGIONS 8
#define VHOST_MAX_VIRTQUEUES 0x100
#define VHOST_USER_F_PROTOCOL_FEATURES 30
#define VHOST_USER_PROTOCOL_F_MQ 0
#define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
#define VHOST_USER_PROTOCOL_F_CROSS_ENDIAN 6
#define VHOST_LOG_PAGE 0x1000
typedef enum VhostUserRequest {
VHOST_USER_NONE = 0,
VHOST_USER_GET_FEATURES = 1,
VHOST_USER_SET_FEATURES = 2,
VHOST_USER_SET_OWNER = 3,
VHOST_USER_RESET_OWNER = 4,
VHOST_USER_SET_MEM_TABLE = 5,
VHOST_USER_SET_LOG_BASE = 6,
VHOST_USER_SET_LOG_FD = 7,
VHOST_USER_SET_VRING_NUM = 8,
VHOST_USER_SET_VRING_ADDR = 9,
VHOST_USER_SET_VRING_BASE = 10,
VHOST_USER_GET_VRING_BASE = 11,
VHOST_USER_SET_VRING_KICK = 12,
VHOST_USER_SET_VRING_CALL = 13,
VHOST_USER_SET_VRING_ERR = 14,
VHOST_USER_GET_PROTOCOL_FEATURES = 15,
VHOST_USER_SET_PROTOCOL_FEATURES = 16,
VHOST_USER_GET_QUEUE_NUM = 17,
VHOST_USER_SET_VRING_ENABLE = 18,
VHOST_USER_MAX
} VhostUserRequest;
typedef struct VhostUserMemoryRegion {
uint64_t guest_phys_addr;
uint64_t memory_size;
uint64_t userspace_addr;
uint64_t mmap_offset;
} VhostUserMemoryRegion;
typedef struct VhostUserMemory {
uint32_t nregions;
uint32_t padding;
VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
} VhostUserMemory;
typedef struct VhostUserLog {
uint64_t mmap_size;
uint64_t mmap_offset;
} VhostUserLog;
typedef struct VhostUserMsg {
VhostUserRequest request;
#define VHOST_USER_VERSION_MASK (0x3)
#define VHOST_USER_REPLY_MASK (0x1<<2)
uint32_t flags;
uint32_t size; /* the following payload size */
union {
#define VHOST_USER_VRING_IDX_MASK (0xff)
#define VHOST_USER_VRING_NOFD_MASK (0x1<<8)
uint64_t u64;
struct vhost_vring_state state;
struct vhost_vring_addr addr;
VhostUserMemory memory;
VhostUserLog log;
} payload;
} QEMU_PACKED VhostUserMsg;
static VhostUserMsg m __attribute__ ((unused));
#define VHOST_USER_HDR_SIZE (sizeof(m.request) \
+ sizeof(m.flags) \
+ sizeof(m.size))
#define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
/* The version of the protocol we support */
#define VHOST_USER_VERSION (0x1)
/*****************************************************************************/
enum {
TEST_FLAGS_OK,
TEST_FLAGS_DISCONNECT,
TEST_FLAGS_BAD,
TEST_FLAGS_END,
};
typedef struct TestServer {
QPCIBus *bus;
QVirtioPCIDevice *dev;
QVirtQueue *vq[VHOST_MAX_VIRTQUEUES];
gchar *socket_path;
gchar *mig_path;
gchar *chr_name;
const gchar *mem_path;
gchar *tmpfs;
CharBackend chr;
int fds_num;
int fds[VHOST_MEMORY_MAX_NREGIONS];
VhostUserMemory memory;
GMainContext *context;
GMainLoop *loop;
GThread *thread;
GMutex data_mutex;
GCond data_cond;
int log_fd;
uint64_t rings;
bool test_fail;
int test_flags;
int queues;
QGuestAllocator *alloc;
} TestServer;
static TestServer *test_server_new(const gchar *name);
static void test_server_free(TestServer *server);
static void test_server_listen(TestServer *server);
enum test_memfd {
TEST_MEMFD_AUTO,
TEST_MEMFD_YES,
TEST_MEMFD_NO,
};
static char *get_qemu_cmd(TestServer *s,
int mem, enum test_memfd memfd,
const char *chr_opts, const char *extra)
{
if (memfd == TEST_MEMFD_AUTO && qemu_memfd_check(0)) {
memfd = TEST_MEMFD_YES;
}
if (memfd == TEST_MEMFD_YES) {
return g_strdup_printf(QEMU_CMD_MEMFD QEMU_CMD_CHR
QEMU_CMD_NETDEV QEMU_CMD_NET "%s", mem, mem,
s->chr_name, s->socket_path,
chr_opts, s->chr_name, extra);
} else {
return g_strdup_printf(QEMU_CMD_MEM QEMU_CMD_CHR
QEMU_CMD_NETDEV QEMU_CMD_NET "%s", mem, mem,
s->mem_path, s->chr_name, s->socket_path,
chr_opts, s->chr_name, extra);
}
}
static void init_virtio_dev(QTestState *qts, TestServer *s, uint32_t features_mask)
{
uint32_t features;
int i;
s->bus = qpci_init_pc(qts, NULL);
g_assert_nonnull(s->bus);
s->dev = qvirtio_pci_device_find(s->bus, VIRTIO_ID_NET);
g_assert_nonnull(s->dev);
qvirtio_pci_device_enable(s->dev);
qvirtio_reset(&s->dev->vdev);
qvirtio_set_acknowledge(&s->dev->vdev);
qvirtio_set_driver(&s->dev->vdev);
s->alloc = pc_alloc_init(qts);
for (i = 0; i < s->queues * 2; i++) {
s->vq[i] = qvirtqueue_setup(&s->dev->vdev, s->alloc, i);
}
features = qvirtio_get_features(&s->dev->vdev);
features = features & features_mask;
qvirtio_set_features(&s->dev->vdev, features);
qvirtio_set_driver_ok(&s->dev->vdev);
}
static void uninit_virtio_dev(TestServer *s)
{
int i;
for (i = 0; i < s->queues * 2; i++) {
qvirtqueue_cleanup(s->dev->vdev.bus, s->vq[i], s->alloc);
}
pc_alloc_uninit(s->alloc);
qvirtio_pci_device_free(s->dev);
}
static bool wait_for_fds(TestServer *s)
{
gint64 end_time;
bool got_region;
int i;
g_mutex_lock(&s->data_mutex);
end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
while (!s->fds_num) {
if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
/* timeout has passed */
g_assert(s->fds_num);
break;
}
}
/* check for sanity */
g_assert_cmpint(s->fds_num, >, 0);
g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
g_mutex_unlock(&s->data_mutex);
got_region = false;
for (i = 0; i < s->memory.nregions; ++i) {
VhostUserMemoryRegion *reg = &s->memory.regions[i];
if (reg->guest_phys_addr == 0) {
got_region = true;
break;
}
}
if (!got_region) {
g_test_skip("No memory at address 0x0");
}
return got_region;
}
static void read_guest_mem_server(QTestState *qts, TestServer *s)
{
uint8_t *guest_mem;
int i, j;
size_t size;
g_mutex_lock(&s->data_mutex);
/* iterate all regions */
for (i = 0; i < s->fds_num; i++) {
/* We'll check 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 < 1024; j++) {
uint32_t a = qtest_readb(qts, s->memory.regions[i].guest_phys_addr + j);
uint32_t b = guest_mem[j];
g_assert_cmpint(a, ==, b);
}
munmap(guest_mem, s->memory.regions[i].memory_size);
}
g_mutex_unlock(&s->data_mutex);
}
static void *thread_function(void *data)
{
GMainLoop *loop = data;
g_main_loop_run(loop);
return NULL;
}
static int chr_can_read(void *opaque)
{
return VHOST_USER_HDR_SIZE;
}
static void chr_read(void *opaque, const uint8_t *buf, int size)
{
TestServer *s = opaque;
CharBackend *chr = &s->chr;
VhostUserMsg msg;
uint8_t *p = (uint8_t *) &msg;
int fd = -1;
if (s->test_fail) {
qemu_chr_fe_disconnect(chr);
/* now switch to non-failure */
s->test_fail = false;
}
if (size != VHOST_USER_HDR_SIZE) {
g_test_message("Wrong message size received %d\n", size);
return;
}
g_mutex_lock(&s->data_mutex);
memcpy(p, buf, VHOST_USER_HDR_SIZE);
if (msg.size) {
p += VHOST_USER_HDR_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) {
case VHOST_USER_GET_FEATURES:
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.u64);
msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
if (s->queues > 1) {
msg.payload.u64 |= 0x1ULL << VIRTIO_NET_F_MQ;
}
if (s->test_flags >= TEST_FLAGS_BAD) {
msg.payload.u64 = 0;
s->test_flags = TEST_FLAGS_END;
}
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_SET_FEATURES:
g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
!=, 0ULL);
if (s->test_flags == TEST_FLAGS_DISCONNECT) {
qemu_chr_fe_disconnect(chr);
s->test_flags = TEST_FLAGS_BAD;
}
break;
case VHOST_USER_GET_PROTOCOL_FEATURES:
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.u64);
msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_CROSS_ENDIAN;
if (s->queues > 1) {
msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_MQ;
}
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_GET_VRING_BASE:
/* send back vring base to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.state);
msg.payload.state.num = 0;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
assert(msg.payload.state.index < s->queues * 2);
s->rings &= ~(0x1ULL << msg.payload.state.index);
g_cond_broadcast(&s->data_cond);
break;
case VHOST_USER_SET_MEM_TABLE:
/* received the mem table */
memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds,
G_N_ELEMENTS(s->fds));
/* signal the test that it can continue */
g_cond_broadcast(&s->data_cond);
break;
case VHOST_USER_SET_VRING_KICK:
case VHOST_USER_SET_VRING_CALL:
/* consume the fd */
qemu_chr_fe_get_msgfds(chr, &fd, 1);
/*
* This is a non-blocking eventfd.
* The receive function forces it to be blocking,
* so revert it back to non-blocking.
*/
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_broadcast(&s->data_cond);
break;
case VHOST_USER_SET_VRING_BASE:
assert(msg.payload.state.index < s->queues * 2);
s->rings |= 0x1ULL << msg.payload.state.index;
g_cond_broadcast(&s->data_cond);
break;
case VHOST_USER_GET_QUEUE_NUM:
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.u64);
msg.payload.u64 = s->queues;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
default:
break;
}
g_mutex_unlock(&s->data_mutex);
}
static const char *init_hugepagefs(void)
{
#ifdef CONFIG_LINUX
const char *path = getenv("QTEST_HUGETLBFS_PATH");
struct statfs fs;
int ret;
if (!path) {
return NULL;
}
if (access(path, R_OK | W_OK | X_OK)) {
g_test_message("access on path (%s): %s\n", path, strerror(errno));
abort();
return NULL;
}
do {
ret = statfs(path, &fs);
} while (ret != 0 && errno == EINTR);
if (ret != 0) {
g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
abort();
return NULL;
}
if (fs.f_type != HUGETLBFS_MAGIC) {
g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
abort();
return NULL;
}
return path;
#else
return NULL;
#endif
}
static TestServer *test_server_new(const gchar *name)
{
TestServer *server = g_new0(TestServer, 1);
char template[] = "/tmp/vhost-test-XXXXXX";
const char *tmpfs;
server->context = g_main_context_new();
server->loop = g_main_loop_new(server->context, FALSE);
/* run the main loop thread so the chardev may operate */
server->thread = g_thread_new(NULL, thread_function, server->loop);
tmpfs = mkdtemp(template);
if (!tmpfs) {
g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
}
g_assert(tmpfs);
server->tmpfs = g_strdup(tmpfs);
server->mem_path = init_hugepagefs() ? : server->tmpfs;
server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
server->chr_name = g_strdup_printf("chr-%s", name);
g_mutex_init(&server->data_mutex);
g_cond_init(&server->data_cond);
server->log_fd = -1;
server->queues = 1;
return server;
}
static void chr_event(void *opaque, int event)
{
TestServer *s = opaque;
if (s->test_flags == TEST_FLAGS_END &&
event == CHR_EVENT_CLOSED) {
s->test_flags = TEST_FLAGS_OK;
}
}
static void test_server_create_chr(TestServer *server, const gchar *opt)
{
gchar *chr_path;
Chardev *chr;
chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
chr = qemu_chr_new(server->chr_name, chr_path, server->context);
g_free(chr_path);
g_assert_nonnull(chr);
qemu_chr_fe_init(&server->chr, chr, &error_abort);
qemu_chr_fe_set_handlers(&server->chr, chr_can_read, chr_read,
chr_event, NULL, server, server->context, true);
}
static void test_server_listen(TestServer *server)
{
test_server_create_chr(server, ",server,nowait");
}
static void test_server_free(TestServer *server)
{
int i, ret;
/* finish the helper thread and dispatch pending sources */
g_main_loop_quit(server->loop);
g_thread_join(server->thread);
while (g_main_context_pending(NULL)) {
g_main_context_iteration(NULL, TRUE);
}
unlink(server->socket_path);
g_free(server->socket_path);
unlink(server->mig_path);
g_free(server->mig_path);
ret = rmdir(server->tmpfs);
if (ret != 0) {
g_test_message("unable to rmdir: path (%s): %s",
server->tmpfs, strerror(errno));
}
qemu_chr_fe_deinit(&server->chr, true);
for (i = 0; i < server->fds_num; i++) {
close(server->fds[i]);
}
if (server->log_fd != -1) {
close(server->log_fd);
}
g_free(server->chr_name);
g_assert(server->bus);
qpci_free_pc(server->bus);
g_main_loop_unref(server->loop);
g_main_context_unref(server->context);
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_t seed)
{
uint32_t *guest_mem;
int i, j;
size_t size;
/* 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;
}
typedef struct TestMigrateSource {
GSource source;
TestServer *src;
TestServer *dest;
} TestMigrateSource;
static gboolean
test_migrate_source_check(GSource *source)
{
TestMigrateSource *t = (TestMigrateSource *)source;
gboolean overlap = t->src->rings && t->dest->rings;
g_assert(!overlap);
return FALSE;
}
GSourceFuncs test_migrate_source_funcs = {
.check = test_migrate_source_check,
};
static void test_read_guest_mem(const void *arg)
{
enum test_memfd memfd = GPOINTER_TO_INT(arg);
TestServer *server = NULL;
char *qemu_cmd = NULL;
QTestState *s = NULL;
server = test_server_new(memfd == TEST_MEMFD_YES ?
"read-guest-memfd" : "read-guest-mem");
test_server_listen(server);
qemu_cmd = get_qemu_cmd(server, 512, memfd, "", "");
s = qtest_start(qemu_cmd);
g_free(qemu_cmd);
init_virtio_dev(global_qtest, server, 1u << VIRTIO_NET_F_MAC);
if (!wait_for_fds(server)) {
goto exit;
}
read_guest_mem_server(global_qtest, server);
exit:
uninit_virtio_dev(server);
qtest_quit(s);
test_server_free(server);
}
static void test_migrate(void)
{
TestServer *s = test_server_new("src");
TestServer *dest = test_server_new("dest");
char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
QTestState *from, *to;
GSource *source;
gchar *cmd, *tmp;
QDict *rsp;
guint8 *log;
guint64 size;
test_server_listen(s);
test_server_listen(dest);
cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, "", "");
from = qtest_start(cmd);
g_free(cmd);
init_virtio_dev(from, s, 1u << VIRTIO_NET_F_MAC);
if (!wait_for_fds(s)) {
goto exit;
}
size = get_log_size(s);
g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
tmp = g_strdup_printf(" -incoming %s", uri);
cmd = get_qemu_cmd(dest, 2, TEST_MEMFD_AUTO, "", tmp);
g_free(tmp);
to = qtest_init(cmd);
g_free(cmd);
init_virtio_dev(to, dest, 1u << VIRTIO_NET_F_MAC);
source = g_source_new(&test_migrate_source_funcs,
sizeof(TestMigrateSource));
((TestMigrateSource *)source)->src = s;
((TestMigrateSource *)source)->dest = dest;
g_source_attach(source, s->context);
/* 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"));
qobject_unref(rsp);
rsp = qmp("{ 'execute': 'migrate', 'arguments': { 'uri': %s } }", uri);
g_assert(qdict_haskey(rsp, "return"));
qobject_unref(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"));
qobject_unref(rsp);
qmp_eventwait("STOP");
qtest_qmp_eventwait(to, "RESUME");
g_assert(wait_for_fds(dest));
read_guest_mem_server(to, dest);
uninit_virtio_dev(dest);
qtest_quit(to);
g_source_destroy(source);
g_source_unref(source);
exit:
uninit_virtio_dev(s);
test_server_free(dest);
qtest_quit(from);
test_server_free(s);
g_free(uri);
}
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 inline void test_server_connect(TestServer *server)
{
test_server_create_chr(server, ",reconnect=1");
}
static gboolean
reconnect_cb(gpointer user_data)
{
TestServer *s = user_data;
qemu_chr_fe_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");
GSource *src;
char *cmd;
g_thread_new("connect", connect_thread, s);
cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, ",server", "");
qtest_start(cmd);
g_free(cmd);
init_virtio_dev(global_qtest, s, 1u << VIRTIO_NET_F_MAC);
if (!wait_for_fds(s)) {
goto exit;
}
wait_for_rings_started(s, 2);
/* reconnect */
s->fds_num = 0;
s->rings = 0;
src = g_idle_source_new();
g_source_set_callback(src, reconnect_cb, s, NULL);
g_source_attach(src, s->context);
g_source_unref(src);
g_assert(wait_for_fds(s));
wait_for_rings_started(s, 2);
exit:
uninit_virtio_dev(s);
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();
g_free(path);
}
static void test_connect_fail_subprocess(void)
{
TestServer *s = test_server_new("connect-fail");
char *cmd;
s->test_fail = true;
g_thread_new("connect", connect_thread, s);
cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, ",server", "");
qtest_start(cmd);
g_free(cmd);
init_virtio_dev(global_qtest, s, 1u << VIRTIO_NET_F_MAC);
if (!wait_for_fds(s)) {
goto exit;
}
wait_for_rings_started(s, 2);
exit:
uninit_virtio_dev(s);
qtest_end();
test_server_free(s);
}
static void test_connect_fail(void)
{
gchar *path = g_strdup_printf("/%s/vhost-user/connect-fail/subprocess",
qtest_get_arch());
g_test_trap_subprocess(path, 0, 0);
g_test_trap_assert_passed();
g_free(path);
}
static void test_flags_mismatch_subprocess(void)
{
TestServer *s = test_server_new("flags-mismatch");
char *cmd;
s->test_flags = TEST_FLAGS_DISCONNECT;
g_thread_new("connect", connect_thread, s);
cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, ",server", "");
qtest_start(cmd);
g_free(cmd);
init_virtio_dev(global_qtest, s, 1u << VIRTIO_NET_F_MAC);
if (!wait_for_fds(s)) {
goto exit;
}
wait_for_rings_started(s, 2);
exit:
uninit_virtio_dev(s);
qtest_end();
test_server_free(s);
}
static void test_flags_mismatch(void)
{
gchar *path = g_strdup_printf("/%s/vhost-user/flags-mismatch/subprocess",
qtest_get_arch());
g_test_trap_subprocess(path, 0, 0);
g_test_trap_assert_passed();
g_free(path);
}
static void test_multiqueue(void)
{
TestServer *s = test_server_new("mq");
char *cmd;
uint32_t features_mask = ~(QVIRTIO_F_BAD_FEATURE |
(1u << VIRTIO_RING_F_INDIRECT_DESC) |
(1u << VIRTIO_RING_F_EVENT_IDX));
s->queues = 2;
test_server_listen(s);
if (qemu_memfd_check(0)) {
cmd = g_strdup_printf(
QEMU_CMD_MEMFD QEMU_CMD_CHR QEMU_CMD_NETDEV ",queues=%d "
"-device virtio-net-pci,netdev=net0,mq=on,vectors=%d",
512, 512, s->chr_name,
s->socket_path, "", s->chr_name,
s->queues, s->queues * 2 + 2);
} else {
cmd = g_strdup_printf(
QEMU_CMD_MEM QEMU_CMD_CHR QEMU_CMD_NETDEV ",queues=%d "
"-device virtio-net-pci,netdev=net0,mq=on,vectors=%d",
512, 512, s->mem_path, s->chr_name,
s->socket_path, "", s->chr_name,
s->queues, s->queues * 2 + 2);
}
qtest_start(cmd);
g_free(cmd);
init_virtio_dev(global_qtest, s, features_mask);
wait_for_rings_started(s, s->queues * 2);
uninit_virtio_dev(s);
qtest_end();
test_server_free(s);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
module_call_init(MODULE_INIT_QOM);
qemu_add_opts(&qemu_chardev_opts);
if (qemu_memfd_check(0)) {
qtest_add_data_func("/vhost-user/read-guest-mem/memfd",
GINT_TO_POINTER(TEST_MEMFD_YES),
test_read_guest_mem);
}
qtest_add_data_func("/vhost-user/read-guest-mem/memfile",
GINT_TO_POINTER(TEST_MEMFD_NO), test_read_guest_mem);
qtest_add_func("/vhost-user/migrate", test_migrate);
qtest_add_func("/vhost-user/multiqueue", test_multiqueue);
/* keeps failing on build-system since Aug 15 2017 */
if (getenv("QTEST_VHOST_USER_FIXME")) {
qtest_add_func("/vhost-user/reconnect/subprocess",
test_reconnect_subprocess);
qtest_add_func("/vhost-user/reconnect", test_reconnect);
qtest_add_func("/vhost-user/connect-fail/subprocess",
test_connect_fail_subprocess);
qtest_add_func("/vhost-user/connect-fail", test_connect_fail);
qtest_add_func("/vhost-user/flags-mismatch/subprocess",
test_flags_mismatch_subprocess);
qtest_add_func("/vhost-user/flags-mismatch", test_flags_mismatch);
}
return g_test_run();
}
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