tests/hd-geo-test.c

   1 /*
   2  * Hard disk geometry test cases.
   3  *
   4  * Copyright (c) 2012 Red Hat Inc.
   5  *
   6  * Authors:
   7  *  Markus Armbruster <armbru@redhat.com>,
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 /*
  14  * Covers only IDE and tests only CMOS contents.  Better than nothing.
  15  * Improvements welcome.
  16  */
  17
  18 #include "qemu/osdep.h"
  19 #include "qemu-common.h"
  20 #include "libqtest.h"
  21
  22 #define ARGV_SIZE 256
  23
  24 static char *create_test_img(int secs)
  25 {
  26     char *template = strdup("/tmp/qtest.XXXXXX");
  27     int fd, ret;
  28
  29     fd = mkstemp(template);
  30     g_assert(fd >= 0);
  31     ret = ftruncate(fd, (off_t)secs * 512);
  32     g_assert(ret == 0);
  33     close(fd);
  34     return template;
  35 }
  36
  37 typedef struct {
  38     int cyls, heads, secs, trans;
  39 } CHST;
  40
  41 typedef enum {
  42     mbr_blank, mbr_lba, mbr_chs,
  43     mbr_last
  44 } MBRcontents;
  45
  46 typedef enum {
  47     /* order is relevant */
  48     backend_small, backend_large, backend_empty,
  49     backend_last
  50 } Backend;
  51
  52 static const int img_secs[backend_last] = {
  53     [backend_small] = 61440,
  54     [backend_large] = 8388608,
  55     [backend_empty] = -1,
  56 };
  57
  58 static const CHST hd_chst[backend_last][mbr_last] = {
  59     [backend_small] = {
  60         [mbr_blank] = { 60, 16, 63, 0 },
  61         [mbr_lba]   = { 60, 16, 63, 2 },
  62         [mbr_chs]   = { 60, 16, 63, 0 }
  63     },
  64     [backend_large] = {
  65         [mbr_blank] = { 8322, 16, 63, 1 },
  66         [mbr_lba]   = { 8322, 16, 63, 1 },
  67         [mbr_chs]   = { 8322, 16, 63, 0 }
  68     },
  69 };
  70
  71 static char *img_file_name[backend_last];
  72
  73 static const CHST *cur_ide[4];
  74
  75 static bool is_hd(const CHST *expected_chst)
  76 {
  77     return expected_chst && expected_chst->cyls;
  78 }
  79
  80 static void test_cmos_byte(int reg, int expected)
  81 {
  82     enum { cmos_base = 0x70 };
  83     int actual;
  84
  85     outb(cmos_base + 0, reg);
  86     actual = inb(cmos_base + 1);
  87     g_assert(actual == expected);
  88 }
  89
  90 static void test_cmos_bytes(int reg0, int n, uint8_t expected[])
  91 {
  92     int i;
  93
  94     for (i = 0; i < 9; i++) {
  95         test_cmos_byte(reg0 + i, expected[i]);
  96     }
  97 }
  98
  99 static void test_cmos_disk_data(void)
 100 {
 101     test_cmos_byte(0x12,
 102                    (is_hd(cur_ide[0]) ? 0xf0 : 0) |
 103                    (is_hd(cur_ide[1]) ? 0x0f : 0));
 104 }
 105
 106 static void test_cmos_drive_cyl(int reg0, const CHST *expected_chst)
 107 {
 108     if (is_hd(expected_chst)) {
 109         int c = expected_chst->cyls;
 110         int h = expected_chst->heads;
 111         int s = expected_chst->secs;
 112         uint8_t expected_bytes[9] = {
 113             c & 0xff, c >> 8, h, 0xff, 0xff, 0xc0 | ((h > 8) << 3),
 114             c & 0xff, c >> 8, s
 115         };
 116         test_cmos_bytes(reg0, 9, expected_bytes);
 117     } else {
 118         int i;
 119
 120         for (i = 0; i < 9; i++) {
 121             test_cmos_byte(reg0 + i, 0);
 122         }
 123     }
 124 }
 125
 126 static void test_cmos_drive1(void)
 127 {
 128     test_cmos_byte(0x19, is_hd(cur_ide[0]) ? 47 : 0);
 129     test_cmos_drive_cyl(0x1b, cur_ide[0]);
 130 }
 131
 132 static void test_cmos_drive2(void)
 133 {
 134     test_cmos_byte(0x1a, is_hd(cur_ide[1]) ? 47 : 0);
 135     test_cmos_drive_cyl(0x24, cur_ide[1]);
 136 }
 137
 138 static void test_cmos_disktransflag(void)
 139 {
 140     int val, i;
 141
 142     val = 0;
 143     for (i = 0; i < ARRAY_SIZE(cur_ide); i++) {
 144         if (is_hd(cur_ide[i])) {
 145             val |= cur_ide[i]->trans << (2 * i);
 146         }
 147     }
 148     test_cmos_byte(0x39, val);
 149 }
 150
 151 static void test_cmos(void)
 152 {
 153     test_cmos_disk_data();
 154     test_cmos_drive1();
 155     test_cmos_drive2();
 156     test_cmos_disktransflag();
 157 }
 158
 159 static int append_arg(int argc, char *argv[], int argv_sz, char *arg)
 160 {
 161     g_assert(argc + 1 < argv_sz);
 162     argv[argc++] = arg;
 163     argv[argc] = NULL;
 164     return argc;
 165 }
 166
 167 static int setup_common(char *argv[], int argv_sz)
 168 {
 169     memset(cur_ide, 0, sizeof(cur_ide));
 170     return append_arg(0, argv, argv_sz,
 171                       g_strdup("-nodefaults"));
 172 }
 173
 174 static void setup_mbr(int img_idx, MBRcontents mbr)
 175 {
 176     static const uint8_t part_lba[16] = {
 177         /* chs 0,1,1 (lba 63) to chs 0,127,63 (8001 sectors) */
 178         0x80, 1, 1, 0, 6, 127, 63, 0, 63, 0, 0, 0, 0x41, 0x1F, 0, 0,
 179     };
 180     static const uint8_t part_chs[16] = {
 181         /* chs 0,1,1 (lba 63) to chs 7,15,63 (8001 sectors) */
 182         0x80, 1, 1, 0, 6,  15, 63, 7, 63, 0, 0, 0, 0x41, 0x1F, 0, 0,
 183     };
 184     uint8_t buf[512];
 185     int fd, ret;
 186
 187     memset(buf, 0, sizeof(buf));
 188
 189     if (mbr != mbr_blank) {
 190         buf[0x1fe] = 0x55;
 191         buf[0x1ff] = 0xAA;
 192         memcpy(buf + 0x1BE, mbr == mbr_lba ? part_lba : part_chs, 16);
 193     }
 194
 195     fd = open(img_file_name[img_idx], O_WRONLY);
 196     g_assert(fd >= 0);
 197     ret = write(fd, buf, sizeof(buf));
 198     g_assert(ret == sizeof(buf));
 199     close(fd);
 200 }
 201
 202 static int setup_ide(int argc, char *argv[], int argv_sz,
 203                      int ide_idx, const char *dev, int img_idx,
 204                      MBRcontents mbr)
 205 {
 206     char *s1, *s2, *s3;
 207
 208     s1 = g_strdup_printf("-drive id=drive%d,if=%s",
 209                          ide_idx, dev ? "none" : "ide");
 210     s2 = dev ? g_strdup("") : g_strdup_printf(",index=%d", ide_idx);
 211
 212     if (img_secs[img_idx] >= 0) {
 213         setup_mbr(img_idx, mbr);
 214         s3 = g_strdup_printf(",format=raw,file=%s", img_file_name[img_idx]);
 215     } else {
 216         s3 = g_strdup(",media=cdrom");
 217     }
 218     argc = append_arg(argc, argv, argv_sz,
 219                       g_strdup_printf("%s%s%s", s1, s2, s3));
 220     g_free(s1);
 221     g_free(s2);
 222     g_free(s3);
 223
 224     if (dev) {
 225         argc = append_arg(argc, argv, argv_sz,
 226                           g_strdup_printf("-device %s,drive=drive%d,"
 227                                           "bus=ide.%d,unit=%d",
 228                                           dev, ide_idx,
 229                                           ide_idx / 2, ide_idx % 2));
 230     }
 231     return argc;
 232 }
 233
 234 /*
 235  * Test case: no IDE devices
 236  */
 237 static void test_ide_none(void)
 238 {
 239     char **argv = g_new0(char *, ARGV_SIZE);
 240     char *args;
 241
 242     setup_common(argv, ARGV_SIZE);
 243     args = g_strjoinv(" ", argv);
 244     qtest_start(args);
 245     g_strfreev(argv);
 246     g_free(args);
 247     test_cmos();
 248     qtest_end();
 249 }
 250
 251 static void test_ide_mbr(bool use_device, MBRcontents mbr)
 252 {
 253     char **argv = g_new0(char *, ARGV_SIZE);
 254     char *args;
 255     int argc;
 256     Backend i;
 257     const char *dev;
 258
 259     argc = setup_common(argv, ARGV_SIZE);
 260     for (i = 0; i < backend_last; i++) {
 261         cur_ide[i] = &hd_chst[i][mbr];
 262         dev = use_device ? (is_hd(cur_ide[i]) ? "ide-hd" : "ide-cd") : NULL;
 263         argc = setup_ide(argc, argv, ARGV_SIZE, i, dev, i, mbr);
 264     }
 265     args = g_strjoinv(" ", argv);
 266     qtest_start(args);
 267     g_strfreev(argv);
 268     g_free(args);
 269     test_cmos();
 270     qtest_end();
 271 }
 272
 273 /*
 274  * Test case: IDE devices (if=ide) with blank MBRs
 275  */
 276 static void test_ide_drive_mbr_blank(void)
 277 {
 278     test_ide_mbr(false, mbr_blank);
 279 }
 280
 281 /*
 282  * Test case: IDE devices (if=ide) with MBRs indicating LBA is in use
 283  */
 284 static void test_ide_drive_mbr_lba(void)
 285 {
 286     test_ide_mbr(false, mbr_lba);
 287 }
 288
 289 /*
 290  * Test case: IDE devices (if=ide) with MBRs indicating CHS is in use
 291  */
 292 static void test_ide_drive_mbr_chs(void)
 293 {
 294     test_ide_mbr(false, mbr_chs);
 295 }
 296
 297 /*
 298  * Test case: IDE devices (if=none) with blank MBRs
 299  */
 300 static void test_ide_device_mbr_blank(void)
 301 {
 302     test_ide_mbr(true, mbr_blank);
 303 }
 304
 305 /*
 306  * Test case: IDE devices (if=none) with MBRs indicating LBA is in use
 307  */
 308 static void test_ide_device_mbr_lba(void)
 309 {
 310     test_ide_mbr(true, mbr_lba);
 311 }
 312
 313 /*
 314  * Test case: IDE devices (if=none) with MBRs indicating CHS is in use
 315  */
 316 static void test_ide_device_mbr_chs(void)
 317 {
 318     test_ide_mbr(true, mbr_chs);
 319 }
 320
 321 static void test_ide_drive_user(const char *dev, bool trans)
 322 {
 323     char **argv = g_new0(char *, ARGV_SIZE);
 324     char *args, *opts;
 325     int argc;
 326     int secs = img_secs[backend_small];
 327     const CHST expected_chst = { secs / (4 * 32) , 4, 32, trans };
 328
 329     argc = setup_common(argv, ARGV_SIZE);
 330     opts = g_strdup_printf("%s,%scyls=%d,heads=%d,secs=%d",
 331                            dev, trans ? "bios-chs-trans=lba," : "",
 332                            expected_chst.cyls, expected_chst.heads,
 333                            expected_chst.secs);
 334     cur_ide[0] = &expected_chst;
 335     argc = setup_ide(argc, argv, ARGV_SIZE, 0, opts, backend_small, mbr_chs);
 336     g_free(opts);
 337     args = g_strjoinv(" ", argv);
 338     qtest_start(args);
 339     g_strfreev(argv);
 340     g_free(args);
 341     test_cmos();
 342     qtest_end();
 343 }
 344
 345 /*
 346  * Test case: IDE device (if=none) with explicit CHS
 347  */
 348 static void test_ide_device_user_chs(void)
 349 {
 350     test_ide_drive_user("ide-hd", false);
 351 }
 352
 353 /*
 354  * Test case: IDE device (if=none) with explicit CHS and translation
 355  */
 356 static void test_ide_device_user_chst(void)
 357 {
 358     test_ide_drive_user("ide-hd", true);
 359 }
 360
 361 /*
 362  * Test case: IDE devices (if=ide), but use index=0 for CD-ROM
 363  */
 364 static void test_ide_drive_cd_0(void)
 365 {
 366     char **argv = g_new0(char *, ARGV_SIZE);
 367     char *args;
 368     int argc, ide_idx;
 369     Backend i;
 370
 371     argc = setup_common(argv, ARGV_SIZE);
 372     for (i = 0; i <= backend_empty; i++) {
 373         ide_idx = backend_empty - i;
 374         cur_ide[ide_idx] = &hd_chst[i][mbr_blank];
 375         argc = setup_ide(argc, argv, ARGV_SIZE, ide_idx, NULL, i, mbr_blank);
 376     }
 377     args = g_strjoinv(" ", argv);
 378     qtest_start(args);
 379     g_strfreev(argv);
 380     g_free(args);
 381     test_cmos();
 382     qtest_end();
 383 }
 384
 385 int main(int argc, char **argv)
 386 {
 387     Backend i;
 388     int ret;
 389
 390     g_test_init(&argc, &argv, NULL);
 391
 392     for (i = 0; i < backend_last; i++) {
 393         if (img_secs[i] >= 0) {
 394             img_file_name[i] = create_test_img(img_secs[i]);
 395         } else {
 396             img_file_name[i] = NULL;
 397         }
 398     }
 399
 400     qtest_add_func("hd-geo/ide/none", test_ide_none);
 401     qtest_add_func("hd-geo/ide/drive/mbr/blank", test_ide_drive_mbr_blank);
 402     qtest_add_func("hd-geo/ide/drive/mbr/lba", test_ide_drive_mbr_lba);
 403     qtest_add_func("hd-geo/ide/drive/mbr/chs", test_ide_drive_mbr_chs);
 404     qtest_add_func("hd-geo/ide/drive/cd_0", test_ide_drive_cd_0);
 405     qtest_add_func("hd-geo/ide/device/mbr/blank", test_ide_device_mbr_blank);
 406     qtest_add_func("hd-geo/ide/device/mbr/lba", test_ide_device_mbr_lba);
 407     qtest_add_func("hd-geo/ide/device/mbr/chs", test_ide_device_mbr_chs);
 408     qtest_add_func("hd-geo/ide/device/user/chs", test_ide_device_user_chs);
 409     qtest_add_func("hd-geo/ide/device/user/chst", test_ide_device_user_chst);
 410
 411     ret = g_test_run();
 412
 413     for (i = 0; i < backend_last; i++) {
 414         if (img_file_name[i]) {
 415             unlink(img_file_name[i]);
 416             free(img_file_name[i]);
 417         }
 418     }
 419
 420     return ret;
 421 }