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qemu-e2k/tests/qtest/vhost-user-test.c
Paolo Bonzini 3ee7f21ed2 tests: vhost-user-test: release mutex on protocol violation 
chr_read() is printing an error message and returning with s->data_mutex taken.
This can potentially cause a hang.  Reported by Coverity.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20230427125423.103536-1-pbonzini@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-04-28 08:05:37 +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);
goto out;
}
}
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;
}
out:
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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