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 <glib.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22 #include "qemu-common.h"
  23 #include "libqtest.h"
  24
  25 static const char test_image[] = "/tmp/qtest.XXXXXX";
  26
  27 static char *create_test_img(int secs)
  28 {
  29     char *template = strdup("/tmp/qtest.XXXXXX");
  30     int fd, ret;
  31
  32     fd = mkstemp(template);
  33     g_assert(fd >= 0);
  34     ret = ftruncate(fd, (off_t)secs * 512);
  35     g_assert(ret == 0);
  36     close(fd);
  37     return template;
  38 }
  39
  40 typedef struct {
  41     int cyls, heads, secs, trans;
  42 } CHST;
  43
  44 typedef enum {
  45     mbr_blank, mbr_lba, mbr_chs,
  46     mbr_last
  47 } MBRcontents;
  48
  49 typedef enum {
  50     /* order is relevant */
  51     backend_small, backend_large, backend_empty,
  52     backend_last
  53 } Backend;
  54
  55 static const int img_secs[backend_last] = {
  56     [backend_small] = 61440,
  57     [backend_large] = 8388608,
  58     [backend_empty] = -1,
  59 };
  60
  61 static const CHST hd_chst[backend_last][mbr_last] = {
  62     [backend_small] = {
  63         [mbr_blank] = { 60, 16, 63, 0 },
  64         [mbr_lba]   = { 60, 16, 63, 2 },
  65         [mbr_chs]   = { 60, 16, 63, 0 }
  66     },
  67     [backend_large] = {
  68         [mbr_blank] = { 8322, 16, 63, 1 },
  69         [mbr_lba]   = { 8322, 16, 63, 1 },
  70         [mbr_chs]   = { 8322, 16, 63, 0 }
  71     },
  72 };
  73
  74 static const char *img_file_name[backend_last];
  75
  76 static const CHST *cur_ide[4];
  77
  78 static bool is_hd(const CHST *expected_chst)
  79 {
  80     return expected_chst && expected_chst->cyls;
  81 }
  82
  83 static void test_cmos_byte(int reg, int expected)
  84 {
  85     enum { cmos_base = 0x70 };
  86     int actual;
  87
  88     outb(cmos_base + 0, reg);
  89     actual = inb(cmos_base + 1);
  90     g_assert(actual == expected);
  91 }
  92
  93 static void test_cmos_bytes(int reg0, int n, uint8_t expected[])
  94 {
  95     int i;
  96
  97     for (i = 0; i < 9; i++) {
  98         test_cmos_byte(reg0 + i, expected[i]);
  99     }
 100 }
 101
 102 static void test_cmos_disk_data(void)
 103 {
 104     test_cmos_byte(0x12,
 105                    (is_hd(cur_ide[0]) ? 0xf0 : 0) |
 106                    (is_hd(cur_ide[1]) ? 0x0f : 0));
 107 }
 108
 109 static void test_cmos_drive_cyl(int reg0, const CHST *expected_chst)
 110 {
 111     if (is_hd(expected_chst)) {
 112         int c = expected_chst->cyls;
 113         int h = expected_chst->heads;
 114         int s = expected_chst->secs;
 115         uint8_t expected_bytes[9] = {
 116             c & 0xff, c >> 8, h, 0xff, 0xff, 0xc0 | ((h > 8) << 3),
 117             c & 0xff, c >> 8, s
 118         };
 119         test_cmos_bytes(reg0, 9, expected_bytes);
 120     } else {
 121         int i;
 122
 123         for (i = 0; i < 9; i++) {
 124             test_cmos_byte(reg0 + i, 0);
 125         }
 126     }
 127 }
 128
 129 static void test_cmos_drive1(void)
 130 {
 131     test_cmos_byte(0x19, is_hd(cur_ide[0]) ? 47 : 0);
 132     test_cmos_drive_cyl(0x1b, cur_ide[0]);
 133 }
 134
 135 static void test_cmos_drive2(void)
 136 {
 137     test_cmos_byte(0x1a, is_hd(cur_ide[1]) ? 47 : 0);
 138     test_cmos_drive_cyl(0x24, cur_ide[1]);
 139 }
 140
 141 static void test_cmos_disktransflag(void)
 142 {
 143     int val, i;
 144
 145     val = 0;
 146     for (i = 0; i < ARRAY_SIZE(cur_ide); i++) {
 147         if (is_hd(cur_ide[i])) {
 148             val |= cur_ide[i]->trans << (2 * i);
 149         }
 150     }
 151     test_cmos_byte(0x39, val);
 152 }
 153
 154 static void test_cmos(void)
 155 {
 156     test_cmos_disk_data();
 157     test_cmos_drive1();
 158     test_cmos_drive2();
 159     test_cmos_disktransflag();
 160 }
 161
 162 static int append_arg(int argc, char *argv[], int argv_sz, char *arg)
 163 {
 164     g_assert(argc + 1 < argv_sz);
 165     argv[argc++] = arg;
 166     argv[argc] = NULL;
 167     return argc;
 168 }
 169
 170 static int setup_common(char *argv[], int argv_sz)
 171 {
 172     memset(cur_ide, 0, sizeof(cur_ide));
 173     return append_arg(0, argv, argv_sz,
 174                       g_strdup("-nodefaults -display none"));
 175 }
 176
 177 static void setup_mbr(int img_idx, MBRcontents mbr)
 178 {
 179     static const uint8_t part_lba[16] = {
 180         /* chs 0,1,1 (lba 63) to chs 0,127,63 (8001 sectors) */
 181         0x80, 1, 1, 0, 6, 127, 63, 0, 63, 0, 0, 0, 0x41, 0x1F, 0, 0,
 182     };
 183     static const uint8_t part_chs[16] = {
 184         /* chs 0,1,1 (lba 63) to chs 7,15,63 (8001 sectors) */
 185         0x80, 1, 1, 0, 6,  15, 63, 7, 63, 0, 0, 0, 0x41, 0x1F, 0, 0,
 186     };
 187     uint8_t buf[512];
 188     int fd, ret;
 189
 190     memset(buf, 0, sizeof(buf));
 191
 192     if (mbr != mbr_blank) {
 193         buf[0x1fe] = 0x55;
 194         buf[0x1ff] = 0xAA;
 195         memcpy(buf + 0x1BE, mbr == mbr_lba ? part_lba : part_chs, 16);
 196     }
 197
 198     fd = open(img_file_name[img_idx], O_WRONLY);
 199     g_assert(fd >= 0);
 200     ret = write(fd, buf, sizeof(buf));
 201     g_assert(ret == sizeof(buf));
 202     close(fd);
 203 }
 204
 205 static int setup_ide(int argc, char *argv[], int argv_sz,
 206                      int ide_idx, const char *dev, int img_idx,
 207                      MBRcontents mbr, const char *opts)
 208 {
 209     char *s1, *s2, *s3;
 210
 211     s1 = g_strdup_printf("-drive id=drive%d,if=%s",
 212                          ide_idx, dev ? "none" : "ide");
 213     s2 = dev ? g_strdup("") : g_strdup_printf(",index=%d", ide_idx);
 214
 215     if (img_secs[img_idx] >= 0) {
 216         setup_mbr(img_idx, mbr);
 217         s3 = g_strdup_printf(",file=%s", img_file_name[img_idx]);
 218     } else {
 219         s3 = g_strdup(",media=cdrom");
 220     }
 221     argc = append_arg(argc, argv, argv_sz,
 222                       g_strdup_printf("%s%s%s%s", s1, s2, s3, opts));
 223     g_free(s1);
 224     g_free(s2);
 225     g_free(s3);
 226
 227     if (dev) {
 228         argc = append_arg(argc, argv, argv_sz,
 229                           g_strdup_printf("-device %s,drive=drive%d,"
 230                                           "bus=ide.%d,unit=%d",
 231                                           dev, ide_idx,
 232                                           ide_idx / 2, ide_idx % 2));
 233     }
 234     return argc;
 235 }
 236
 237 /*
 238  * Test case: no IDE devices
 239  */
 240 static void test_ide_none(void)
 241 {
 242     char *argv[256];
 243
 244     setup_common(argv, ARRAY_SIZE(argv));
 245     qtest_start(g_strjoinv(" ", argv));
 246     test_cmos();
 247     qtest_end();
 248 }
 249
 250 static void test_ide_mbr(bool use_device, MBRcontents mbr)
 251 {
 252     char *argv[256];
 253     int argc;
 254     Backend i;
 255     const char *dev;
 256
 257     argc = setup_common(argv, ARRAY_SIZE(argv));
 258     for (i = 0; i < backend_last; i++) {
 259         cur_ide[i] = &hd_chst[i][mbr];
 260         dev = use_device ? (is_hd(cur_ide[i]) ? "ide-hd" : "ide-cd") : NULL;
 261         argc = setup_ide(argc, argv, ARRAY_SIZE(argv), i, dev, i, mbr, "");
 262     }
 263     qtest_start(g_strjoinv(" ", argv));
 264     test_cmos();
 265     qtest_end();
 266 }
 267
 268 /*
 269  * Test case: IDE devices (if=ide) with blank MBRs
 270  */
 271 static void test_ide_drive_mbr_blank(void)
 272 {
 273     test_ide_mbr(false, mbr_blank);
 274 }
 275
 276 /*
 277  * Test case: IDE devices (if=ide) with MBRs indicating LBA is in use
 278  */
 279 static void test_ide_drive_mbr_lba(void)
 280 {
 281     test_ide_mbr(false, mbr_lba);
 282 }
 283
 284 /*
 285  * Test case: IDE devices (if=ide) with MBRs indicating CHS is in use
 286  */
 287 static void test_ide_drive_mbr_chs(void)
 288 {
 289     test_ide_mbr(false, mbr_chs);
 290 }
 291
 292 /*
 293  * Test case: IDE devices (if=none) with blank MBRs
 294  */
 295 static void test_ide_device_mbr_blank(void)
 296 {
 297     test_ide_mbr(true, mbr_blank);
 298 }
 299
 300 /*
 301  * Test case: IDE devices (if=none) with MBRs indicating LBA is in use
 302  */
 303 static void test_ide_device_mbr_lba(void)
 304 {
 305     test_ide_mbr(true, mbr_lba);
 306 }
 307
 308 /*
 309  * Test case: IDE devices (if=none) with MBRs indicating CHS is in use
 310  */
 311 static void test_ide_device_mbr_chs(void)
 312 {
 313     test_ide_mbr(true, mbr_chs);
 314 }
 315
 316 static void test_ide_drive_user(const char *dev, bool trans)
 317 {
 318     char *argv[256], *opts;
 319     int argc;
 320     int secs = img_secs[backend_small];
 321     const CHST expected_chst = { secs / (4 * 32) , 4, 32, trans };
 322
 323     argc = setup_common(argv, ARRAY_SIZE(argv));
 324     opts = g_strdup_printf("%s,%s%scyls=%d,heads=%d,secs=%d",
 325                            dev ?: "",
 326                            trans && dev ? "bios-chs-" : "",
 327                            trans ? "trans=lba," : "",
 328                            expected_chst.cyls, expected_chst.heads,
 329                            expected_chst.secs);
 330     cur_ide[0] = &expected_chst;
 331     argc = setup_ide(argc, argv, ARRAY_SIZE(argv),
 332                      0, dev ? opts : NULL, backend_small, mbr_chs,
 333                      dev ? "" : opts);
 334     g_free(opts);
 335     qtest_start(g_strjoinv(" ", argv));
 336     test_cmos();
 337     qtest_end();
 338 }
 339
 340 /*
 341  * Test case: IDE device (if=ide) with explicit CHS
 342  */
 343 static void test_ide_drive_user_chs(void)
 344 {
 345     test_ide_drive_user(NULL, false);
 346 }
 347
 348 /*
 349  * Test case: IDE device (if=ide) with explicit CHS and translation
 350  */
 351 static void test_ide_drive_user_chst(void)
 352 {
 353     test_ide_drive_user(NULL, true);
 354 }
 355
 356 /*
 357  * Test case: IDE device (if=none) with explicit CHS
 358  */
 359 static void test_ide_device_user_chs(void)
 360 {
 361     test_ide_drive_user("ide-hd", false);
 362 }
 363
 364 /*
 365  * Test case: IDE device (if=none) with explicit CHS and translation
 366  */
 367 static void test_ide_device_user_chst(void)
 368 {
 369     test_ide_drive_user("ide-hd", true);
 370 }
 371
 372 /*
 373  * Test case: IDE devices (if=ide), but use index=0 for CD-ROM
 374  */
 375 static void test_ide_drive_cd_0(void)
 376 {
 377     char *argv[256];
 378     int argc, ide_idx;
 379     Backend i;
 380
 381     argc = setup_common(argv, ARRAY_SIZE(argv));
 382     for (i = 0; i <= backend_empty; i++) {
 383         ide_idx = backend_empty - i;
 384         cur_ide[ide_idx] = &hd_chst[i][mbr_blank];
 385         argc = setup_ide(argc, argv, ARRAY_SIZE(argv),
 386                          ide_idx, NULL, i, mbr_blank, "");
 387     }
 388     qtest_start(g_strjoinv(" ", argv));
 389     test_cmos();
 390     qtest_end();
 391 }
 392
 393 int main(int argc, char **argv)
 394 {
 395     Backend i;
 396     int ret;
 397
 398     g_test_init(&argc, &argv, NULL);
 399
 400     for (i = 0; i < backend_last; i++) {
 401         if (img_secs[i] >= 0) {
 402             img_file_name[i] = create_test_img(img_secs[i]);
 403         } else {
 404             img_file_name[i] = NULL;
 405         }
 406     }
 407
 408     qtest_add_func("hd-geo/ide/none", test_ide_none);
 409     qtest_add_func("hd-geo/ide/drive/mbr/blank", test_ide_drive_mbr_blank);
 410     qtest_add_func("hd-geo/ide/drive/mbr/lba", test_ide_drive_mbr_lba);
 411     qtest_add_func("hd-geo/ide/drive/mbr/chs", test_ide_drive_mbr_chs);
 412     qtest_add_func("hd-geo/ide/drive/user/chs", test_ide_drive_user_chs);
 413     qtest_add_func("hd-geo/ide/drive/user/chst", test_ide_drive_user_chst);
 414     qtest_add_func("hd-geo/ide/drive/cd_0", test_ide_drive_cd_0);
 415     qtest_add_func("hd-geo/ide/device/mbr/blank", test_ide_device_mbr_blank);
 416     qtest_add_func("hd-geo/ide/device/mbr/lba", test_ide_device_mbr_lba);
 417     qtest_add_func("hd-geo/ide/device/mbr/chs", test_ide_device_mbr_chs);
 418     qtest_add_func("hd-geo/ide/device/user/chs", test_ide_device_user_chs);
 419     qtest_add_func("hd-geo/ide/device/user/chst", test_ide_device_user_chst);
 420
 421     ret = g_test_run();
 422
 423     for (i = 0; i < backend_last; i++) {
 424         unlink(img_file_name[i]);
 425     }
 426
 427     return ret;
 428 }