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qemu/tests/test-vmstate.c

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/*
* Test code for VMState
*
* Copyright (c) 2013 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <glib.h>
#include "qemu-common.h"
#include "migration/migration.h"
#include "migration/vmstate.h"
#include "block/coroutine.h"
char temp_file[] = "/tmp/vmst.test.XXXXXX";
int temp_fd;
/* Fake yield_until_fd_readable() implementation so we don't have to pull the
* coroutine code as dependency.
*/
void yield_until_fd_readable(int fd)
{
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd, &fds);
select(fd + 1, &fds, NULL, NULL, NULL);
}
/* Duplicate temp_fd and seek to the beginning of the file */
static int dup_temp_fd(bool truncate)
{
int fd = dup(temp_fd);
lseek(fd, 0, SEEK_SET);
if (truncate) {
g_assert_cmpint(ftruncate(fd, 0), ==, 0);
}
return fd;
}
typedef struct TestSruct {
uint32_t a, b, c, e;
uint64_t d, f;
bool skip_c_e;
} TestStruct;
static const VMStateDescription vmstate_simple = {
.name = "test",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(a, TestStruct),
VMSTATE_UINT32(b, TestStruct),
VMSTATE_UINT32(c, TestStruct),
VMSTATE_UINT64(d, TestStruct),
VMSTATE_END_OF_LIST()
}
};
static void test_simple_save(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4 };
vmstate_save_state(fsave, &vmstate_simple, &obj);
g_assert(!qemu_file_get_error(fsave));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
uint8_t expected[] = {
0, 0, 0, 1, /* a */
0, 0, 0, 2, /* b */
0, 0, 0, 3, /* c */
0, 0, 0, 0, 0, 0, 0, 4, /* d */
};
uint8_t result[sizeof(expected)];
g_assert_cmpint(qemu_get_buffer(loading, result, sizeof(result)), ==,
sizeof(result));
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(memcmp(result, expected, sizeof(result)), ==, 0);
/* Must reach EOF */
qemu_get_byte(loading);
g_assert_cmpint(qemu_file_get_error(loading), ==, -EIO);
qemu_fclose(loading);
}
static void test_simple_load(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 20, /* b */
0, 0, 0, 30, /* c */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
qemu_put_buffer(fsave, buf, sizeof(buf));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
TestStruct obj;
vmstate_load_state(loading, &vmstate_simple, &obj, 1);
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 20);
g_assert_cmpint(obj.c, ==, 30);
g_assert_cmpint(obj.d, ==, 40);
qemu_fclose(loading);
}
static const VMStateDescription vmstate_versioned = {
.name = "test",
.version_id = 2,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT32(a, TestStruct),
VMSTATE_UINT32_V(b, TestStruct, 2), /* Versioned field in the middle, so
* we catch bugs more easily.
*/
VMSTATE_UINT32(c, TestStruct),
VMSTATE_UINT64(d, TestStruct),
VMSTATE_UINT32_V(e, TestStruct, 2),
VMSTATE_UINT64_V(f, TestStruct, 2),
VMSTATE_END_OF_LIST()
}
};
static void test_load_v1(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 30, /* c */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
qemu_put_buffer(fsave, buf, sizeof(buf));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
TestStruct obj = { .b = 200, .e = 500, .f = 600 };
vmstate_load_state(loading, &vmstate_versioned, &obj, 1);
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 200);
g_assert_cmpint(obj.c, ==, 30);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 500);
g_assert_cmpint(obj.f, ==, 600);
qemu_fclose(loading);
}
static void test_load_v2(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 20, /* b */
0, 0, 0, 30, /* c */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
0, 0, 0, 50, /* e */
0, 0, 0, 0, 0, 0, 0, 60, /* f */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
qemu_put_buffer(fsave, buf, sizeof(buf));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
TestStruct obj;
vmstate_load_state(loading, &vmstate_versioned, &obj, 2);
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 20);
g_assert_cmpint(obj.c, ==, 30);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 50);
g_assert_cmpint(obj.f, ==, 60);
qemu_fclose(loading);
}
static bool test_skip(void *opaque, int version_id)
{
TestStruct *t = (TestStruct *)opaque;
return !t->skip_c_e;
}
static const VMStateDescription vmstate_skipping = {
.name = "test",
.version_id = 2,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT32(a, TestStruct),
VMSTATE_UINT32(b, TestStruct),
VMSTATE_UINT32_TEST(c, TestStruct, test_skip),
VMSTATE_UINT64(d, TestStruct),
VMSTATE_UINT32_TEST(e, TestStruct, test_skip),
VMSTATE_UINT64_V(f, TestStruct, 2),
VMSTATE_END_OF_LIST()
}
};
static void test_save_noskip(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
.skip_c_e = false };
vmstate_save_state(fsave, &vmstate_skipping, &obj);
g_assert(!qemu_file_get_error(fsave));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
uint8_t expected[] = {
0, 0, 0, 1, /* a */
0, 0, 0, 2, /* b */
0, 0, 0, 3, /* c */
0, 0, 0, 0, 0, 0, 0, 4, /* d */
0, 0, 0, 5, /* e */
0, 0, 0, 0, 0, 0, 0, 6, /* f */
};
uint8_t result[sizeof(expected)];
g_assert_cmpint(qemu_get_buffer(loading, result, sizeof(result)), ==,
sizeof(result));
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(memcmp(result, expected, sizeof(result)), ==, 0);
/* Must reach EOF */
qemu_get_byte(loading);
g_assert_cmpint(qemu_file_get_error(loading), ==, -EIO);
qemu_fclose(loading);
}
static void test_save_skip(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
.skip_c_e = true };
vmstate_save_state(fsave, &vmstate_skipping, &obj);
g_assert(!qemu_file_get_error(fsave));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
uint8_t expected[] = {
0, 0, 0, 1, /* a */
0, 0, 0, 2, /* b */
0, 0, 0, 0, 0, 0, 0, 4, /* d */
0, 0, 0, 0, 0, 0, 0, 6, /* f */
};
uint8_t result[sizeof(expected)];
g_assert_cmpint(qemu_get_buffer(loading, result, sizeof(result)), ==,
sizeof(result));
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(memcmp(result, expected, sizeof(result)), ==, 0);
/* Must reach EOF */
qemu_get_byte(loading);
g_assert_cmpint(qemu_file_get_error(loading), ==, -EIO);
qemu_fclose(loading);
}
static void test_load_noskip(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 20, /* b */
0, 0, 0, 30, /* c */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
0, 0, 0, 50, /* e */
0, 0, 0, 0, 0, 0, 0, 60, /* f */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
qemu_put_buffer(fsave, buf, sizeof(buf));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
TestStruct obj = { .skip_c_e = false };
vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 20);
g_assert_cmpint(obj.c, ==, 30);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 50);
g_assert_cmpint(obj.f, ==, 60);
qemu_fclose(loading);
}
static void test_load_skip(void)
{
QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
uint8_t buf[] = {
0, 0, 0, 10, /* a */
0, 0, 0, 20, /* b */
0, 0, 0, 0, 0, 0, 0, 40, /* d */
0, 0, 0, 0, 0, 0, 0, 60, /* f */
QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};
qemu_put_buffer(fsave, buf, sizeof(buf));
qemu_fclose(fsave);
QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
TestStruct obj = { .skip_c_e = true, .c = 300, .e = 500 };
vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
g_assert(!qemu_file_get_error(loading));
g_assert_cmpint(obj.a, ==, 10);
g_assert_cmpint(obj.b, ==, 20);
g_assert_cmpint(obj.c, ==, 300);
g_assert_cmpint(obj.d, ==, 40);
g_assert_cmpint(obj.e, ==, 500);
g_assert_cmpint(obj.f, ==, 60);
qemu_fclose(loading);
}
int main(int argc, char **argv)
{
temp_fd = mkstemp(temp_file);
g_test_init(&argc, &argv, NULL);
g_test_add_func("/vmstate/simple/save", test_simple_save);
g_test_add_func("/vmstate/simple/load", test_simple_load);
g_test_add_func("/vmstate/versioned/load/v1", test_load_v1);
g_test_add_func("/vmstate/versioned/load/v2", test_load_v2);
g_test_add_func("/vmstate/field_exists/load/noskip", test_load_noskip);
g_test_add_func("/vmstate/field_exists/load/skip", test_load_skip);
g_test_add_func("/vmstate/field_exists/save/noskip", test_save_noskip);
g_test_add_func("/vmstate/field_exists/save/skip", test_save_skip);
g_test_run();
close(temp_fd);
unlink(temp_file);
return 0;
}
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