tests/test-vmstate.c

   1 /*
   2  *  Test code for VMState
   3  *
   4  *  Copyright (c) 2013 Red Hat Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include <glib.h>
  26
  27 #include "qemu-common.h"
  28 #include "migration/migration.h"
  29 #include "migration/vmstate.h"
  30 #include "block/coroutine.h"
  31
  32 char temp_file[] = "/tmp/vmst.test.XXXXXX";
  33 int temp_fd;
  34
  35 /* Fake yield_until_fd_readable() implementation so we don't have to pull the
  36  * coroutine code as dependency.
  37  */
  38 void yield_until_fd_readable(int fd)
  39 {
  40     fd_set fds;
  41     FD_ZERO(&fds);
  42     FD_SET(fd, &fds);
  43     select(fd + 1, &fds, NULL, NULL, NULL);
  44 }
  45
  46 /* Duplicate temp_fd and seek to the beginning of the file */
  47 static int dup_temp_fd(bool truncate)
  48 {
  49     int fd = dup(temp_fd);
  50     lseek(fd, 0, SEEK_SET);
  51     if (truncate) {
  52         g_assert_cmpint(ftruncate(fd, 0), ==, 0);
  53     }
  54     return fd;
  55 }
  56
  57 typedef struct TestSruct {
  58     uint32_t a, b, c, e;
  59     uint64_t d, f;
  60     bool skip_c_e;
  61 } TestStruct;
  62
  63
  64 static const VMStateDescription vmstate_simple = {
  65     .name = "test",
  66     .version_id = 1,
  67     .minimum_version_id = 1,
  68     .minimum_version_id_old = 1,
  69     .fields      = (VMStateField[]) {
  70         VMSTATE_UINT32(a, TestStruct),
  71         VMSTATE_UINT32(b, TestStruct),
  72         VMSTATE_UINT32(c, TestStruct),
  73         VMSTATE_UINT64(d, TestStruct),
  74         VMSTATE_END_OF_LIST()
  75     }
  76 };
  77
  78 static void test_simple_save(void)
  79 {
  80     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
  81     TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4 };
  82     vmstate_save_state(fsave, &vmstate_simple, &obj);
  83     g_assert(!qemu_file_get_error(fsave));
  84     qemu_fclose(fsave);
  85
  86     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
  87     uint8_t expected[] = {
  88         0, 0, 0, 1, /* a */
  89         0, 0, 0, 2, /* b */
  90         0, 0, 0, 3, /* c */
  91         0, 0, 0, 0, 0, 0, 0, 4, /* d */
  92     };
  93     uint8_t result[sizeof(expected)];
  94     g_assert_cmpint(qemu_get_buffer(loading, result, sizeof(result)), ==,
  95                     sizeof(result));
  96     g_assert(!qemu_file_get_error(loading));
  97     g_assert_cmpint(memcmp(result, expected, sizeof(result)), ==, 0);
  98
  99     /* Must reach EOF */
 100     qemu_get_byte(loading);
 101     g_assert_cmpint(qemu_file_get_error(loading), ==, -EIO);
 102
 103     qemu_fclose(loading);
 104 }
 105
 106 static void test_simple_load(void)
 107 {
 108     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
 109     uint8_t buf[] = {
 110         0, 0, 0, 10,             /* a */
 111         0, 0, 0, 20,             /* b */
 112         0, 0, 0, 30,             /* c */
 113         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 114         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 115     };
 116     qemu_put_buffer(fsave, buf, sizeof(buf));
 117     qemu_fclose(fsave);
 118
 119     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
 120     TestStruct obj;
 121     vmstate_load_state(loading, &vmstate_simple, &obj, 1);
 122     g_assert(!qemu_file_get_error(loading));
 123     g_assert_cmpint(obj.a, ==, 10);
 124     g_assert_cmpint(obj.b, ==, 20);
 125     g_assert_cmpint(obj.c, ==, 30);
 126     g_assert_cmpint(obj.d, ==, 40);
 127     qemu_fclose(loading);
 128 }
 129
 130 static const VMStateDescription vmstate_versioned = {
 131     .name = "test",
 132     .version_id = 2,
 133     .minimum_version_id = 1,
 134     .minimum_version_id_old = 1,
 135     .fields      = (VMStateField []) {
 136         VMSTATE_UINT32(a, TestStruct),
 137         VMSTATE_UINT32_V(b, TestStruct, 2), /* Versioned field in the middle, so
 138                                              * we catch bugs more easily.
 139                                              */
 140         VMSTATE_UINT32(c, TestStruct),
 141         VMSTATE_UINT64(d, TestStruct),
 142         VMSTATE_UINT32_V(e, TestStruct, 2),
 143         VMSTATE_UINT64_V(f, TestStruct, 2),
 144         VMSTATE_END_OF_LIST()
 145     }
 146 };
 147
 148 static void test_load_v1(void)
 149 {
 150     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
 151     uint8_t buf[] = {
 152         0, 0, 0, 10,             /* a */
 153         0, 0, 0, 30,             /* c */
 154         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 155         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 156     };
 157     qemu_put_buffer(fsave, buf, sizeof(buf));
 158     qemu_fclose(fsave);
 159
 160     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
 161     TestStruct obj = { .b = 200, .e = 500, .f = 600 };
 162     vmstate_load_state(loading, &vmstate_versioned, &obj, 1);
 163     g_assert(!qemu_file_get_error(loading));
 164     g_assert_cmpint(obj.a, ==, 10);
 165     g_assert_cmpint(obj.b, ==, 200);
 166     g_assert_cmpint(obj.c, ==, 30);
 167     g_assert_cmpint(obj.d, ==, 40);
 168     g_assert_cmpint(obj.e, ==, 500);
 169     g_assert_cmpint(obj.f, ==, 600);
 170     qemu_fclose(loading);
 171 }
 172
 173 static void test_load_v2(void)
 174 {
 175     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
 176     uint8_t buf[] = {
 177         0, 0, 0, 10,             /* a */
 178         0, 0, 0, 20,             /* b */
 179         0, 0, 0, 30,             /* c */
 180         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 181         0, 0, 0, 50,             /* e */
 182         0, 0, 0, 0, 0, 0, 0, 60, /* f */
 183         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 184     };
 185     qemu_put_buffer(fsave, buf, sizeof(buf));
 186     qemu_fclose(fsave);
 187
 188     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
 189     TestStruct obj;
 190     vmstate_load_state(loading, &vmstate_versioned, &obj, 2);
 191     g_assert_cmpint(obj.a, ==, 10);
 192     g_assert_cmpint(obj.b, ==, 20);
 193     g_assert_cmpint(obj.c, ==, 30);
 194     g_assert_cmpint(obj.d, ==, 40);
 195     g_assert_cmpint(obj.e, ==, 50);
 196     g_assert_cmpint(obj.f, ==, 60);
 197     qemu_fclose(loading);
 198 }
 199
 200 static bool test_skip(void *opaque, int version_id)
 201 {
 202     TestStruct *t = (TestStruct *)opaque;
 203     return !t->skip_c_e;
 204 }
 205
 206 static const VMStateDescription vmstate_skipping = {
 207     .name = "test",
 208     .version_id = 2,
 209     .minimum_version_id = 1,
 210     .minimum_version_id_old = 1,
 211     .fields      = (VMStateField []) {
 212         VMSTATE_UINT32(a, TestStruct),
 213         VMSTATE_UINT32(b, TestStruct),
 214         VMSTATE_UINT32_TEST(c, TestStruct, test_skip),
 215         VMSTATE_UINT64(d, TestStruct),
 216         VMSTATE_UINT32_TEST(e, TestStruct, test_skip),
 217         VMSTATE_UINT64_V(f, TestStruct, 2),
 218         VMSTATE_END_OF_LIST()
 219     }
 220 };
 221
 222
 223 static void test_save_noskip(void)
 224 {
 225     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
 226     TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
 227                        .skip_c_e = false };
 228     vmstate_save_state(fsave, &vmstate_skipping, &obj);
 229     g_assert(!qemu_file_get_error(fsave));
 230     qemu_fclose(fsave);
 231
 232     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
 233     uint8_t expected[] = {
 234         0, 0, 0, 1,             /* a */
 235         0, 0, 0, 2,             /* b */
 236         0, 0, 0, 3,             /* c */
 237         0, 0, 0, 0, 0, 0, 0, 4, /* d */
 238         0, 0, 0, 5,             /* e */
 239         0, 0, 0, 0, 0, 0, 0, 6, /* f */
 240     };
 241     uint8_t result[sizeof(expected)];
 242     g_assert_cmpint(qemu_get_buffer(loading, result, sizeof(result)), ==,
 243                     sizeof(result));
 244     g_assert(!qemu_file_get_error(loading));
 245     g_assert_cmpint(memcmp(result, expected, sizeof(result)), ==, 0);
 246
 247     /* Must reach EOF */
 248     qemu_get_byte(loading);
 249     g_assert_cmpint(qemu_file_get_error(loading), ==, -EIO);
 250
 251     qemu_fclose(loading);
 252 }
 253
 254 static void test_save_skip(void)
 255 {
 256     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
 257     TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
 258                        .skip_c_e = true };
 259     vmstate_save_state(fsave, &vmstate_skipping, &obj);
 260     g_assert(!qemu_file_get_error(fsave));
 261     qemu_fclose(fsave);
 262
 263     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
 264     uint8_t expected[] = {
 265         0, 0, 0, 1,             /* a */
 266         0, 0, 0, 2,             /* b */
 267         0, 0, 0, 0, 0, 0, 0, 4, /* d */
 268         0, 0, 0, 0, 0, 0, 0, 6, /* f */
 269     };
 270     uint8_t result[sizeof(expected)];
 271     g_assert_cmpint(qemu_get_buffer(loading, result, sizeof(result)), ==,
 272                     sizeof(result));
 273     g_assert(!qemu_file_get_error(loading));
 274     g_assert_cmpint(memcmp(result, expected, sizeof(result)), ==, 0);
 275
 276
 277     /* Must reach EOF */
 278     qemu_get_byte(loading);
 279     g_assert_cmpint(qemu_file_get_error(loading), ==, -EIO);
 280
 281     qemu_fclose(loading);
 282 }
 283
 284 static void test_load_noskip(void)
 285 {
 286     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
 287     uint8_t buf[] = {
 288         0, 0, 0, 10,             /* a */
 289         0, 0, 0, 20,             /* b */
 290         0, 0, 0, 30,             /* c */
 291         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 292         0, 0, 0, 50,             /* e */
 293         0, 0, 0, 0, 0, 0, 0, 60, /* f */
 294         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 295     };
 296     qemu_put_buffer(fsave, buf, sizeof(buf));
 297     qemu_fclose(fsave);
 298
 299     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
 300     TestStruct obj = { .skip_c_e = false };
 301     vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
 302     g_assert(!qemu_file_get_error(loading));
 303     g_assert_cmpint(obj.a, ==, 10);
 304     g_assert_cmpint(obj.b, ==, 20);
 305     g_assert_cmpint(obj.c, ==, 30);
 306     g_assert_cmpint(obj.d, ==, 40);
 307     g_assert_cmpint(obj.e, ==, 50);
 308     g_assert_cmpint(obj.f, ==, 60);
 309     qemu_fclose(loading);
 310 }
 311
 312 static void test_load_skip(void)
 313 {
 314     QEMUFile *fsave = qemu_fdopen(dup_temp_fd(true), "wb");
 315     uint8_t buf[] = {
 316         0, 0, 0, 10,             /* a */
 317         0, 0, 0, 20,             /* b */
 318         0, 0, 0, 0, 0, 0, 0, 40, /* d */
 319         0, 0, 0, 0, 0, 0, 0, 60, /* f */
 320         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
 321     };
 322     qemu_put_buffer(fsave, buf, sizeof(buf));
 323     qemu_fclose(fsave);
 324
 325     QEMUFile *loading = qemu_fdopen(dup_temp_fd(false), "rb");
 326     TestStruct obj = { .skip_c_e = true, .c = 300, .e = 500 };
 327     vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
 328     g_assert(!qemu_file_get_error(loading));
 329     g_assert_cmpint(obj.a, ==, 10);
 330     g_assert_cmpint(obj.b, ==, 20);
 331     g_assert_cmpint(obj.c, ==, 300);
 332     g_assert_cmpint(obj.d, ==, 40);
 333     g_assert_cmpint(obj.e, ==, 500);
 334     g_assert_cmpint(obj.f, ==, 60);
 335     qemu_fclose(loading);
 336 }
 337
 338 int main(int argc, char **argv)
 339 {
 340     temp_fd = mkstemp(temp_file);
 341
 342     g_test_init(&argc, &argv, NULL);
 343     g_test_add_func("/vmstate/simple/save", test_simple_save);
 344     g_test_add_func("/vmstate/simple/load", test_simple_load);
 345     g_test_add_func("/vmstate/versioned/load/v1", test_load_v1);
 346     g_test_add_func("/vmstate/versioned/load/v2", test_load_v2);
 347     g_test_add_func("/vmstate/field_exists/load/noskip", test_load_noskip);
 348     g_test_add_func("/vmstate/field_exists/load/skip", test_load_skip);
 349     g_test_add_func("/vmstate/field_exists/save/noskip", test_save_noskip);
 350     g_test_add_func("/vmstate/field_exists/save/skip", test_save_skip);
 351     g_test_run();
 352
 353     close(temp_fd);
 354     unlink(temp_file);
 355
 356     return 0;
 357 }