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qemu-e2k/tests/qtest/vhost-user-test.c
Bin Meng 1c324bf908 tests/qtest: vhost-user-test: Fix [-Werror=format-overflow=] build warning 
When tmpfs is NULL, a build warning is seen with GCC 9.3.0.
It's strange that GCC 11.2.0 on Ubuntu 22.04 does not catch this,
neither did the QEMU CI.

While we are here, improve the error message as well.

Reported-by: Shengjiang Wu <shengjiang.wu@windriver.com>
Fixes: e6efe236c1 ("tests/qtest: vhost-user-test: Avoid using hardcoded /tmp")
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221017132023.2228641-2-bmeng.cn@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-22 23:17:06 +02:00

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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-single.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 "qemu/module.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 "libqos/qgraph_internal.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"
#include "standard-headers/linux/virtio_gpio.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=hs0,chardev=%s,vhostforce=on"
#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 VIRTIO_F_VERSION_1 32
#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_USER_PROTOCOL_F_CONFIG 9
#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_GET_CONFIG = 24,
VHOST_USER_SET_CONFIG = 25,
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,
};
enum {
VHOST_USER_NET,
VHOST_USER_GPIO,
};
typedef struct TestServer {
gchar *socket_path;
gchar *mig_path;
gchar *chr_name;
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;
struct vhost_user_ops *vu_ops;
} TestServer;
struct vhost_user_ops {
/* Device types. */
int type;
void (*append_opts)(TestServer *s, GString *cmd_line,
const char *chr_opts);
/* VHOST-USER commands. */
uint64_t (*get_features)(TestServer *s);
void (*set_features)(TestServer *s, CharBackend *chr,
VhostUserMsg *msg);
void (*get_protocol_features)(TestServer *s,
CharBackend *chr, VhostUserMsg *msg);
};
static const char *init_hugepagefs(void);
static TestServer *test_server_new(const gchar *name,
struct vhost_user_ops *ops);
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 void append_vhost_net_opts(TestServer *s, GString *cmd_line,
const char *chr_opts)
{
g_string_append_printf(cmd_line, QEMU_CMD_CHR QEMU_CMD_NETDEV,
s->chr_name, s->socket_path,
chr_opts, s->chr_name);
}
/*
* For GPIO there are no other magic devices we need to add (like
* block or netdev) so all we need to worry about is the vhost-user
* chardev socket.
*/
static void append_vhost_gpio_opts(TestServer *s, GString *cmd_line,
const char *chr_opts)
{
g_string_append_printf(cmd_line, QEMU_CMD_CHR,
s->chr_name, s->socket_path,
chr_opts);
}
static void append_mem_opts(TestServer *server, GString *cmd_line,
int size, enum test_memfd memfd)
{
if (memfd == TEST_MEMFD_AUTO) {
memfd = qemu_memfd_check(MFD_ALLOW_SEALING) ? TEST_MEMFD_YES
: TEST_MEMFD_NO;
}
if (memfd == TEST_MEMFD_YES) {
g_string_append_printf(cmd_line, QEMU_CMD_MEMFD, size, size);
} else {
const char *root = init_hugepagefs() ? : server->tmpfs;
g_string_append_printf(cmd_line, QEMU_CMD_MEM, size, size, root);
}
}
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)
{
g_autoptr(GError) err = NULL;
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) {
qos_printf("%s: Wrong message size received %d\n", __func__, 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) {
qos_printf("%s: Wrong message size received %d != %d\n",
__func__, size, msg.size);
return;
}
}
switch (msg.request) {
case VHOST_USER_GET_FEATURES:
/* Mandatory for tests to define get_features */
g_assert(s->vu_ops->get_features);
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.payload.u64);
if (s->test_flags >= TEST_FLAGS_BAD) {
msg.payload.u64 = 0;
s->test_flags = TEST_FLAGS_END;
} else {
msg.payload.u64 = s->vu_ops->get_features(s);
}
qemu_chr_fe_write_all(chr, (uint8_t *) &msg,
VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_SET_FEATURES:
if (s->vu_ops->set_features) {
s->vu_ops->set_features(s, chr, &msg);
}
break;
case VHOST_USER_SET_OWNER:
/*
* We don't need to do anything here, the remote is just
* letting us know it is in charge. Just log it.
*/
qos_printf("set_owner: start of session\n");
break;
case VHOST_USER_GET_PROTOCOL_FEATURES:
if (s->vu_ops->get_protocol_features) {
s->vu_ops->get_protocol_features(s, chr, &msg);
}
break;
case VHOST_USER_GET_CONFIG:
/*
* Treat GET_CONFIG as a NOP and just reply and let the guest
* consider we have updated its memory. Tests currently don't
* require working configs.
*/
msg.flags |= VHOST_USER_REPLY_MASK;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_SET_PROTOCOL_FEATURES:
/*
* We did set VHOST_USER_F_PROTOCOL_FEATURES so its valid for
* the remote end to send this. There is no handshake reply so
* just log the details for debugging.
*/
qos_printf("set_protocol_features: 0x%"PRIx64 "\n", msg.payload.u64);
break;
/*
* A real vhost-user backend would actually set the size and
* address of the vrings but we can simply report them.
*/
case VHOST_USER_SET_VRING_NUM:
qos_printf("set_vring_num: %d/%d\n",
msg.payload.state.index, msg.payload.state.num);
break;
case VHOST_USER_SET_VRING_ADDR:
qos_printf("set_vring_addr: 0x%"PRIx64"/0x%"PRIx64"/0x%"PRIx64"\n",
msg.payload.addr.avail_user_addr,
msg.payload.addr.desc_user_addr,
msg.payload.addr.used_user_addr);
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.
*/
g_unix_set_fd_nonblocking(fd, true, &err);
g_assert_no_error(err);
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;
case VHOST_USER_SET_VRING_ENABLE:
/*
* Another case we ignore as we don't need to respond. With a
* fully functioning vhost-user we would enable/disable the
* vring monitoring.
*/
qos_printf("set_vring(%d)=%s\n", msg.payload.state.index,
msg.payload.state.num ? "enabled" : "disabled");
break;
default:
qos_printf("vhost-user: un-handled message: %d\n", msg.request);
break;
}
g_mutex_unlock(&s->data_mutex);
}
static const char *init_hugepagefs(void)
{
#ifdef CONFIG_LINUX
static const char *hugepagefs;
const char *path = getenv("QTEST_HUGETLBFS_PATH");
struct statfs fs;
int ret;
if (hugepagefs) {
return hugepagefs;
}
if (!path) {
return NULL;
}
if (access(path, R_OK | W_OK | X_OK)) {
qos_printf("access on path (%s): %s", path, strerror(errno));
g_test_fail();
return NULL;
}
do {
ret = statfs(path, &fs);
} while (ret != 0 && errno == EINTR);
if (ret != 0) {
qos_printf("statfs on path (%s): %s", path, strerror(errno));
g_test_fail();
return NULL;
}
if (fs.f_type != HUGETLBFS_MAGIC) {
qos_printf("Warning: path not on HugeTLBFS: %s", path);
g_test_fail();
return NULL;
}
hugepagefs = path;
return hugepagefs;
#else
return NULL;
#endif
}
static TestServer *test_server_new(const gchar *name,
struct vhost_user_ops *ops)
{
TestServer *server = g_new0(TestServer, 1);
g_autofree const char *tmpfs = NULL;
GError *err = NULL;
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 = g_dir_make_tmp("vhost-test-XXXXXX", &err);
if (!tmpfs) {
g_test_message("Can't create temporary directory in %s: %s",
g_get_tmp_dir(), err->message);
g_error_free(err);
}
g_assert(tmpfs);
server->tmpfs = g_strdup(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;
server->vu_ops = ops;
return server;
}
static void chr_event(void *opaque, QEMUChrEvent 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)
{
g_autofree gchar *chr_path = g_strdup_printf("unix:%s%s",
server->socket_path, opt);
Chardev *chr;
chr = qemu_chr_new(server->chr_name, chr_path, server->context);
g_assert(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=on,wait=off");
}
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));
}
g_free(server->tmpfs);
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_main_loop_unref(server->loop);
g_main_context_unref(server->context);
g_cond_clear(&server->data_cond);
g_mutex_clear(&server->data_mutex);
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 vhost_user_test_cleanup(void *s)
{
TestServer *server = s;
qos_invalidate_command_line();
test_server_free(server);
}
static void *vhost_user_test_setup(GString *cmd_line, void *arg)
{
TestServer *server = test_server_new("vhost-user-test", arg);
test_server_listen(server);
append_mem_opts(server, cmd_line, 256, TEST_MEMFD_AUTO);
server->vu_ops->append_opts(server, cmd_line, "");
g_test_queue_destroy(vhost_user_test_cleanup, server);
return server;
}
static void *vhost_user_test_setup_memfd(GString *cmd_line, void *arg)
{
TestServer *server = test_server_new("vhost-user-test", arg);
test_server_listen(server);
append_mem_opts(server, cmd_line, 256, TEST_MEMFD_YES);
server->vu_ops->append_opts(server, cmd_line, "");
g_test_queue_destroy(vhost_user_test_cleanup, server);
return server;
}
static void test_read_guest_mem(void *obj, void *arg, QGuestAllocator *alloc)
{
TestServer *server = arg;
if (!wait_for_fds(server)) {
return;
}
read_guest_mem_server(global_qtest, server);
}
static void test_migrate(void *obj, void *arg, QGuestAllocator *alloc)
{
TestServer *s = arg;
TestServer *dest;
GString *dest_cmdline;
char *uri;
QTestState *to;
GSource *source;
QDict *rsp;
guint8 *log;
guint64 size;
if (!wait_for_fds(s)) {
return;
}
dest = test_server_new("dest", s->vu_ops);
dest_cmdline = g_string_new(qos_get_current_command_line());
uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
size = get_log_size(s);
g_assert_cmpint(size, ==, (256 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
test_server_listen(dest);
g_string_append_printf(dest_cmdline, " -incoming %s", uri);
append_mem_opts(dest, dest_cmdline, 256, TEST_MEMFD_AUTO);
dest->vu_ops->append_opts(dest, dest_cmdline, "");
to = qtest_init(dest_cmdline->str);
/* This would be where you call qos_allocate_objects(to, NULL), if you want
* to talk to the QVirtioNet object on the destination.
*/
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-parameters',"
"'arguments': { 'max-bandwidth': 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-parameters',"
"'arguments': { 'max-bandwidth': 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);
g_source_destroy(source);
g_source_unref(source);
qtest_quit(to);
test_server_free(dest);
g_free(uri);
g_string_free(dest_cmdline, true);
}
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 *vhost_user_test_setup_reconnect(GString *cmd_line, void *arg)
{
TestServer *s = test_server_new("reconnect", arg);
g_thread_new("connect", connect_thread, s);
append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
s->vu_ops->append_opts(s, cmd_line, ",server=on");
g_test_queue_destroy(vhost_user_test_cleanup, s);
return s;
}
static void test_reconnect(void *obj, void *arg, QGuestAllocator *alloc)
{
TestServer *s = arg;
GSource *src;
if (!wait_for_fds(s)) {
return;
}
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);
}
static void *vhost_user_test_setup_connect_fail(GString *cmd_line, void *arg)
{
TestServer *s = test_server_new("connect-fail", arg);
s->test_fail = true;
g_thread_new("connect", connect_thread, s);
append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
s->vu_ops->append_opts(s, cmd_line, ",server=on");
g_test_queue_destroy(vhost_user_test_cleanup, s);
return s;
}
static void *vhost_user_test_setup_flags_mismatch(GString *cmd_line, void *arg)
{
TestServer *s = test_server_new("flags-mismatch", arg);
s->test_flags = TEST_FLAGS_DISCONNECT;
g_thread_new("connect", connect_thread, s);
append_mem_opts(s, cmd_line, 256, TEST_MEMFD_AUTO);
s->vu_ops->append_opts(s, cmd_line, ",server=on");
g_test_queue_destroy(vhost_user_test_cleanup, s);
return s;
}
static void test_vhost_user_started(void *obj, void *arg, QGuestAllocator *alloc)
{
TestServer *s = arg;
if (!wait_for_fds(s)) {
return;
}
wait_for_rings_started(s, 2);
}
static void *vhost_user_test_setup_multiqueue(GString *cmd_line, void *arg)
{
TestServer *s = vhost_user_test_setup(cmd_line, arg);
s->queues = 2;
g_string_append_printf(cmd_line,
" -set netdev.hs0.queues=%d"
" -global virtio-net-pci.vectors=%d",
s->queues, s->queues * 2 + 2);
return s;
}
static void test_multiqueue(void *obj, void *arg, QGuestAllocator *alloc)
{
TestServer *s = arg;
wait_for_rings_started(s, s->queues * 2);
}
static uint64_t vu_net_get_features(TestServer *s)
{
uint64_t features = 0x1ULL << VHOST_F_LOG_ALL |
0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
if (s->queues > 1) {
features |= 0x1ULL << VIRTIO_NET_F_MQ;
}
return features;
}
static void vu_net_set_features(TestServer *s, CharBackend *chr,
VhostUserMsg *msg)
{
g_assert(msg->payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES));
if (s->test_flags == TEST_FLAGS_DISCONNECT) {
qemu_chr_fe_disconnect(chr);
s->test_flags = TEST_FLAGS_BAD;
}
}
static void vu_net_get_protocol_features(TestServer *s, CharBackend *chr,
VhostUserMsg *msg)
{
/* 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;
}
qemu_chr_fe_write_all(chr, (uint8_t *)msg, VHOST_USER_HDR_SIZE + msg->size);
}
/* Each VHOST-USER device should have its ops structure defined. */
static struct vhost_user_ops g_vu_net_ops = {
.type = VHOST_USER_NET,
.append_opts = append_vhost_net_opts,
.get_features = vu_net_get_features,
.set_features = vu_net_set_features,
.get_protocol_features = vu_net_get_protocol_features,
};
static void register_vhost_user_test(void)
{
QOSGraphTestOptions opts = {
.before = vhost_user_test_setup,
.subprocess = true,
.arg = &g_vu_net_ops,
};
qemu_add_opts(&qemu_chardev_opts);
qos_add_test("vhost-user/read-guest-mem/memfile",
"virtio-net",
test_read_guest_mem, &opts);
if (qemu_memfd_check(MFD_ALLOW_SEALING)) {
opts.before = vhost_user_test_setup_memfd;
qos_add_test("vhost-user/read-guest-mem/memfd",
"virtio-net",
test_read_guest_mem, &opts);
}
qos_add_test("vhost-user/migrate",
"virtio-net",
test_migrate, &opts);
opts.before = vhost_user_test_setup_reconnect;
qos_add_test("vhost-user/reconnect", "virtio-net",
test_reconnect, &opts);
opts.before = vhost_user_test_setup_connect_fail;
qos_add_test("vhost-user/connect-fail", "virtio-net",
test_vhost_user_started, &opts);
opts.before = vhost_user_test_setup_flags_mismatch;
qos_add_test("vhost-user/flags-mismatch", "virtio-net",
test_vhost_user_started, &opts);
opts.before = vhost_user_test_setup_multiqueue;
opts.edge.extra_device_opts = "mq=on";
qos_add_test("vhost-user/multiqueue",
"virtio-net",
test_multiqueue, &opts);
}
libqos_init(register_vhost_user_test);
static uint64_t vu_gpio_get_features(TestServer *s)
{
return 0x1ULL << VIRTIO_F_VERSION_1 |
0x1ULL << VIRTIO_GPIO_F_IRQ |
0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
}
/*
* This stub can't handle all the message types but we should reply
* that we support VHOST_USER_PROTOCOL_F_CONFIG as gpio would use it
* talking to a read vhost-user daemon.
*/
static void vu_gpio_get_protocol_features(TestServer *s, CharBackend *chr,
VhostUserMsg *msg)
{
/* send back features to qemu */
msg->flags |= VHOST_USER_REPLY_MASK;
msg->size = sizeof(m.payload.u64);
msg->payload.u64 = 1ULL << VHOST_USER_PROTOCOL_F_CONFIG;
qemu_chr_fe_write_all(chr, (uint8_t *)msg, VHOST_USER_HDR_SIZE + msg->size);
}
static struct vhost_user_ops g_vu_gpio_ops = {
.type = VHOST_USER_GPIO,
.append_opts = append_vhost_gpio_opts,
.get_features = vu_gpio_get_features,
.set_features = vu_net_set_features,
.get_protocol_features = vu_gpio_get_protocol_features,
};
static void register_vhost_gpio_test(void)
{
QOSGraphTestOptions opts = {
.before = vhost_user_test_setup,
.subprocess = true,
.arg = &g_vu_gpio_ops,
};
qemu_add_opts(&qemu_chardev_opts);
qos_add_test("read-guest-mem/memfile",
"vhost-user-gpio", test_read_guest_mem, &opts);
}
libqos_init(register_vhost_gpio_test);
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