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qemu-irix/tests/vhost-user-test.c

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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.
*
*/
#define QEMU_GLIB_COMPAT_H
#include <glib.h>
#include "libqtest.h"
#include "qemu/option.h"
#include "sysemu/char.h"
#include "sysemu/sysemu.h"
#include <linux/vhost.h>
#include <sys/mman.h>
#include <sys/vfs.h>
#include <qemu/sockets.h>
/* GLIB version compatibility flags */
#if !GLIB_CHECK_VERSION(2, 26, 0)
#define G_TIME_SPAN_SECOND (G_GINT64_CONSTANT(1000000))
#endif
#if GLIB_CHECK_VERSION(2, 28, 0)
#define HAVE_MONOTONIC_TIME
#endif
#if GLIB_CHECK_VERSION(2, 32, 0)
#define HAVE_MUTEX_INIT
#define HAVE_COND_INIT
#define HAVE_THREAD_NEW
#endif
#define QEMU_CMD_ACCEL " -machine accel=tcg"
#define QEMU_CMD_MEM " -m 512 -object memory-backend-file,id=mem,size=512M,"\
"mem-path=%s,share=on -numa node,memdev=mem"
#define QEMU_CMD_CHR " -chardev socket,id=chr0,path=%s"
#define QEMU_CMD_NETDEV " -netdev vhost-user,id=net0,chardev=chr0,vhostforce"
#define QEMU_CMD_NET " -device virtio-net-pci,netdev=net0 "
#define QEMU_CMD_ROM " -option-rom ../pc-bios/pxe-virtio.rom"
#define QEMU_CMD QEMU_CMD_ACCEL QEMU_CMD_MEM QEMU_CMD_CHR \
QEMU_CMD_NETDEV QEMU_CMD_NET QEMU_CMD_ROM
#define HUGETLBFS_MAGIC 0x958458f6
/*********** FROM hw/virtio/vhost-user.c *************************************/
#define VHOST_MEMORY_MAX_NREGIONS 8
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_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 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 {
uint64_t u64;
struct vhost_vring_state state;
struct vhost_vring_addr addr;
VhostUserMemory memory;
};
} 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)
/*****************************************************************************/
int fds_num = 0, fds[VHOST_MEMORY_MAX_NREGIONS];
static VhostUserMemory memory;
static GMutex *data_mutex;
static GCond *data_cond;
static gint64 _get_time(void)
{
#ifdef HAVE_MONOTONIC_TIME
return g_get_monotonic_time();
#else
GTimeVal time;
g_get_current_time(&time);
return time.tv_sec * G_TIME_SPAN_SECOND + time.tv_usec;
#endif
}
static GMutex *_mutex_new(void)
{
GMutex *mutex;
#ifdef HAVE_MUTEX_INIT
mutex = g_new(GMutex, 1);
g_mutex_init(mutex);
#else
mutex = g_mutex_new();
#endif
return mutex;
}
static void _mutex_free(GMutex *mutex)
{
#ifdef HAVE_MUTEX_INIT
g_mutex_clear(mutex);
g_free(mutex);
#else
g_mutex_free(mutex);
#endif
}
static GCond *_cond_new(void)
{
GCond *cond;
#ifdef HAVE_COND_INIT
cond = g_new(GCond, 1);
g_cond_init(cond);
#else
cond = g_cond_new();
#endif
return cond;
}
static gboolean _cond_wait_until(GCond *cond, GMutex *mutex, gint64 end_time)
{
gboolean ret = FALSE;
#ifdef HAVE_COND_INIT
ret = g_cond_wait_until(cond, mutex, end_time);
#else
GTimeVal time = { end_time / G_TIME_SPAN_SECOND,
end_time % G_TIME_SPAN_SECOND };
ret = g_cond_timed_wait(cond, mutex, &time);
#endif
return ret;
}
static void _cond_free(GCond *cond)
{
#ifdef HAVE_COND_INIT
g_cond_clear(cond);
g_free(cond);
#else
g_cond_free(cond);
#endif
}
static GThread *_thread_new(const gchar *name, GThreadFunc func, gpointer data)
{
GThread *thread = NULL;
GError *error = NULL;
#ifdef HAVE_THREAD_NEW
thread = g_thread_try_new(name, func, data, &error);
#else
thread = g_thread_create(func, data, TRUE, &error);
#endif
return thread;
}
static void read_guest_mem(void)
{
uint32_t *guest_mem;
gint64 end_time;
int i, j;
size_t size;
g_mutex_lock(data_mutex);
end_time = _get_time() + 5 * G_TIME_SPAN_SECOND;
while (!fds_num) {
if (!_cond_wait_until(data_cond, data_mutex, end_time)) {
/* timeout has passed */
g_assert(fds_num);
break;
}
}
/* check for sanity */
g_assert_cmpint(fds_num, >, 0);
g_assert_cmpint(fds_num, ==, memory.nregions);
/* iterate all regions */
for (i = 0; i < fds_num; i++) {
/* We'll check only the region statring at 0x0*/
if (memory.regions[i].guest_phys_addr != 0x0) {
continue;
}
g_assert_cmpint(memory.regions[i].memory_size, >, 1024);
size = memory.regions[i].memory_size + memory.regions[i].mmap_offset;
guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
MAP_SHARED, fds[i], 0);
g_assert(guest_mem != MAP_FAILED);
guest_mem += (memory.regions[i].mmap_offset / sizeof(*guest_mem));
for (j = 0; j < 256; j++) {
uint32_t a = readl(memory.regions[i].guest_phys_addr + j*4);
uint32_t b = guest_mem[j];
g_assert_cmpint(a, ==, b);
}
munmap(guest_mem, memory.regions[i].memory_size);
}
g_assert_cmpint(1, ==, 1);
g_mutex_unlock(data_mutex);
}
static void *thread_function(void *data)
{
GMainLoop *loop;
loop = g_main_loop_new(NULL, FALSE);
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)
{
CharDriverState *chr = opaque;
VhostUserMsg msg;
uint8_t *p = (uint8_t *) &msg;
int fd;
if (size != VHOST_USER_HDR_SIZE) {
g_test_message("Wrong message size received %d\n", size);
return;
}
g_mutex_lock(data_mutex);
memcpy(p, buf, VHOST_USER_HDR_SIZE);
if (msg.size) {
p += VHOST_USER_HDR_SIZE;
qemu_chr_fe_read_all(chr, p, msg.size);
}
switch (msg.request) {
case VHOST_USER_GET_FEATURES:
/* send back features to qemu */
msg.flags |= VHOST_USER_REPLY_MASK;
msg.size = sizeof(m.u64);
msg.u64 = 0;
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.state);
msg.state.num = 0;
p = (uint8_t *) &msg;
qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
break;
case VHOST_USER_SET_MEM_TABLE:
/* received the mem table */
memcpy(&memory, &msg.memory, sizeof(msg.memory));
fds_num = qemu_chr_fe_get_msgfds(chr, fds, sizeof(fds) / sizeof(int));
/* signal the test that it can continue */
g_cond_signal(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;
default:
break;
}
g_mutex_unlock(data_mutex);
}
static const char *init_hugepagefs(void)
{
const char *path;
struct statfs fs;
int ret;
path = getenv("QTEST_HUGETLBFS_PATH");
if (!path) {
path = "/hugetlbfs";
}
if (access(path, R_OK | W_OK | X_OK)) {
g_test_message("access on path (%s): %s\n", path, strerror(errno));
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));
return NULL;
}
if (fs.f_type != HUGETLBFS_MAGIC) {
g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
return NULL;
}
return path;
}
int main(int argc, char **argv)
{
QTestState *s = NULL;
CharDriverState *chr = NULL;
const char *hugefs = 0;
char *socket_path = 0;
char *qemu_cmd = 0;
char *chr_path = 0;
int ret;
g_test_init(&argc, &argv, NULL);
module_call_init(MODULE_INIT_QOM);
hugefs = init_hugepagefs();
if (!hugefs) {
return 0;
}
socket_path = g_strdup_printf("/tmp/vhost-%d.sock", getpid());
/* create char dev and add read handlers */
qemu_add_opts(&qemu_chardev_opts);
chr_path = g_strdup_printf("unix:%s,server,nowait", socket_path);
chr = qemu_chr_new("chr0", chr_path, NULL);
g_free(chr_path);
qemu_chr_add_handlers(chr, chr_can_read, chr_read, NULL, chr);
/* run the main loop thread so the chardev may operate */
data_mutex = _mutex_new();
data_cond = _cond_new();
_thread_new(NULL, thread_function, NULL);
qemu_cmd = g_strdup_printf(QEMU_CMD, hugefs, socket_path);
s = qtest_start(qemu_cmd);
g_free(qemu_cmd);
qtest_add_func("/vhost-user/read-guest-mem", read_guest_mem);
ret = g_test_run();
if (s) {
qtest_quit(s);
}
/* cleanup */
unlink(socket_path);
g_free(socket_path);
_cond_free(data_cond);
_mutex_free(data_mutex);
return ret;
}
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