lib/test-string_helpers.c

   1 /*
   2  * Test cases for lib/string_helpers.c module.
   3  */
   4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   5
   6 #include <linux/init.h>
   7 #include <linux/kernel.h>
   8 #include <linux/slab.h>
   9 #include <linux/module.h>
  10 #include <linux/random.h>
  11 #include <linux/string.h>
  12 #include <linux/string_helpers.h>
  13
  14 static __init bool test_string_check_buf(const char *name, unsigned int flags,
  15                                          char *in, size_t p,
  16                                          char *out_real, size_t q_real,
  17                                          char *out_test, size_t q_test)
  18 {
  19         if (q_real == q_test && !memcmp(out_test, out_real, q_test))
  20                 return true;
  21
  22         pr_warn("Test '%s' failed: flags = %#x\n", name, flags);
  23
  24         print_hex_dump(KERN_WARNING, "Input: ", DUMP_PREFIX_NONE, 16, 1,
  25                        in, p, true);
  26         print_hex_dump(KERN_WARNING, "Expected: ", DUMP_PREFIX_NONE, 16, 1,
  27                        out_test, q_test, true);
  28         print_hex_dump(KERN_WARNING, "Got: ", DUMP_PREFIX_NONE, 16, 1,
  29                        out_real, q_real, true);
  30
  31         return false;
  32 }
  33
  34 struct test_string {
  35         const char *in;
  36         const char *out;
  37         unsigned int flags;
  38 };
  39
  40 static const struct test_string strings[] __initconst = {
  41         {
  42                 .in = "\\f\\ \\n\\r\\t\\v",
  43                 .out = "\f\\ \n\r\t\v",
  44                 .flags = UNESCAPE_SPACE,
  45         },
  46         {
  47                 .in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
  48                 .out = " \001\00387\0064\005 \\8aH?7",
  49                 .flags = UNESCAPE_OCTAL,
  50         },
  51         {
  52                 .in = "\\xv\\xa\\x2c\\xD\\x6f2",
  53                 .out = "\\xv\n,\ro2",
  54                 .flags = UNESCAPE_HEX,
  55         },
  56         {
  57                 .in = "\\h\\\\\\\"\\a\\e\\",
  58                 .out = "\\h\\\"\a\e\\",
  59                 .flags = UNESCAPE_SPECIAL,
  60         },
  61 };
  62
  63 static void __init test_string_unescape(const char *name, unsigned int flags,
  64                                         bool inplace)
  65 {
  66         int q_real = 256;
  67         char *in = kmalloc(q_real, GFP_KERNEL);
  68         char *out_test = kmalloc(q_real, GFP_KERNEL);
  69         char *out_real = kmalloc(q_real, GFP_KERNEL);
  70         int i, p = 0, q_test = 0;
  71
  72         if (!in || !out_test || !out_real)
  73                 goto out;
  74
  75         for (i = 0; i < ARRAY_SIZE(strings); i++) {
  76                 const char *s = strings[i].in;
  77                 int len = strlen(strings[i].in);
  78
  79                 /* Copy string to in buffer */
  80                 memcpy(&in[p], s, len);
  81                 p += len;
  82
  83                 /* Copy expected result for given flags */
  84                 if (flags & strings[i].flags) {
  85                         s = strings[i].out;
  86                         len = strlen(strings[i].out);
  87                 }
  88                 memcpy(&out_test[q_test], s, len);
  89                 q_test += len;
  90         }
  91         in[p++] = '\0';
  92
  93         /* Call string_unescape and compare result */
  94         if (inplace) {
  95                 memcpy(out_real, in, p);
  96                 if (flags == UNESCAPE_ANY)
  97                         q_real = string_unescape_any_inplace(out_real);
  98                 else
  99                         q_real = string_unescape_inplace(out_real, flags);
 100         } else if (flags == UNESCAPE_ANY) {
 101                 q_real = string_unescape_any(in, out_real, q_real);
 102         } else {
 103                 q_real = string_unescape(in, out_real, q_real, flags);
 104         }
 105
 106         test_string_check_buf(name, flags, in, p - 1, out_real, q_real,
 107                               out_test, q_test);
 108 out:
 109         kfree(out_real);
 110         kfree(out_test);
 111         kfree(in);
 112 }
 113
 114 struct test_string_1 {
 115         const char *out;
 116         unsigned int flags;
 117 };
 118
 119 #define TEST_STRING_2_MAX_S1            32
 120 struct test_string_2 {
 121         const char *in;
 122         struct test_string_1 s1[TEST_STRING_2_MAX_S1];
 123 };
 124
 125 #define TEST_STRING_2_DICT_0            NULL
 126 static const struct test_string_2 escape0[] __initconst = {{
 127         .in = "\f\\ \n\r\t\v",
 128         .s1 = {{
 129                 .out = "\\f\\ \\n\\r\\t\\v",
 130                 .flags = ESCAPE_SPACE,
 131         },{
 132                 .out = "\\f\\134\\040\\n\\r\\t\\v",
 133                 .flags = ESCAPE_SPACE | ESCAPE_OCTAL,
 134         },{
 135                 .out = "\\f\\x5c\\x20\\n\\r\\t\\v",
 136                 .flags = ESCAPE_SPACE | ESCAPE_HEX,
 137         },{
 138                 /* terminator */
 139         }}
 140 },{
 141         .in = "\\h\\\"\a\e\\",
 142         .s1 = {{
 143                 .out = "\\\\h\\\\\\\"\\a\\e\\\\",
 144                 .flags = ESCAPE_SPECIAL,
 145         },{
 146                 .out = "\\\\\\150\\\\\\\"\\a\\e\\\\",
 147                 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
 148         },{
 149                 .out = "\\\\\\x68\\\\\\\"\\a\\e\\\\",
 150                 .flags = ESCAPE_SPECIAL | ESCAPE_HEX,
 151         },{
 152                 /* terminator */
 153         }}
 154 },{
 155         .in = "\eb \\C\007\"\x90\r]",
 156         .s1 = {{
 157                 .out = "\eb \\C\007\"\x90\\r]",
 158                 .flags = ESCAPE_SPACE,
 159         },{
 160                 .out = "\\eb \\\\C\\a\\\"\x90\r]",
 161                 .flags = ESCAPE_SPECIAL,
 162         },{
 163                 .out = "\\eb \\\\C\\a\\\"\x90\\r]",
 164                 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL,
 165         },{
 166                 .out = "\\033\\142\\040\\134\\103\\007\\042\\220\\015\\135",
 167                 .flags = ESCAPE_OCTAL,
 168         },{
 169                 .out = "\\033\\142\\040\\134\\103\\007\\042\\220\\r\\135",
 170                 .flags = ESCAPE_SPACE | ESCAPE_OCTAL,
 171         },{
 172                 .out = "\\e\\142\\040\\\\\\103\\a\\\"\\220\\015\\135",
 173                 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
 174         },{
 175                 .out = "\\e\\142\\040\\\\\\103\\a\\\"\\220\\r\\135",
 176                 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_OCTAL,
 177         },{
 178                 .out = "\eb \\C\007\"\x90\r]",
 179                 .flags = ESCAPE_NP,
 180         },{
 181                 .out = "\eb \\C\007\"\x90\\r]",
 182                 .flags = ESCAPE_SPACE | ESCAPE_NP,
 183         },{
 184                 .out = "\\eb \\C\\a\"\x90\r]",
 185                 .flags = ESCAPE_SPECIAL | ESCAPE_NP,
 186         },{
 187                 .out = "\\eb \\C\\a\"\x90\\r]",
 188                 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NP,
 189         },{
 190                 .out = "\\033b \\C\\007\"\\220\\015]",
 191                 .flags = ESCAPE_OCTAL | ESCAPE_NP,
 192         },{
 193                 .out = "\\033b \\C\\007\"\\220\\r]",
 194                 .flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NP,
 195         },{
 196                 .out = "\\eb \\C\\a\"\\220\\r]",
 197                 .flags = ESCAPE_SPECIAL | ESCAPE_SPACE | ESCAPE_OCTAL |
 198                          ESCAPE_NP,
 199         },{
 200                 .out = "\\x1bb \\C\\x07\"\\x90\\x0d]",
 201                 .flags = ESCAPE_NP | ESCAPE_HEX,
 202         },{
 203                 /* terminator */
 204         }}
 205 },{
 206         .in = "\007 \eb\"\x90\xCF\r",
 207         .s1 = {{
 208                 .out = "\007 \eb\"\\220\\317\r",
 209                 .flags = ESCAPE_OCTAL | ESCAPE_NA,
 210         },{
 211                 .out = "\007 \eb\"\\x90\\xcf\r",
 212                 .flags = ESCAPE_HEX | ESCAPE_NA,
 213         },{
 214                 .out = "\007 \eb\"\x90\xCF\r",
 215                 .flags = ESCAPE_NA,
 216         },{
 217                 /* terminator */
 218         }}
 219 },{
 220         /* terminator */
 221 }};
 222
 223 #define TEST_STRING_2_DICT_1            "b\\ \t\r\xCF"
 224 static const struct test_string_2 escape1[] __initconst = {{
 225         .in = "\f\\ \n\r\t\v",
 226         .s1 = {{
 227                 .out = "\f\\134\\040\n\\015\\011\v",
 228                 .flags = ESCAPE_OCTAL,
 229         },{
 230                 .out = "\f\\x5c\\x20\n\\x0d\\x09\v",
 231                 .flags = ESCAPE_HEX,
 232         },{
 233                 .out = "\f\\134\\040\n\\015\\011\v",
 234                 .flags = ESCAPE_ANY | ESCAPE_APPEND,
 235         },{
 236                 .out = "\\014\\134\\040\\012\\015\\011\\013",
 237                 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
 238         },{
 239                 .out = "\\x0c\\x5c\\x20\\x0a\\x0d\\x09\\x0b",
 240                 .flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NAP,
 241         },{
 242                 .out = "\f\\134\\040\n\\015\\011\v",
 243                 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
 244         },{
 245                 .out = "\f\\x5c\\x20\n\\x0d\\x09\v",
 246                 .flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NA,
 247         },{
 248                 /* terminator */
 249         }}
 250 },{
 251         .in = "\\h\\\"\a\xCF\e\\",
 252         .s1 = {{
 253                 .out = "\\134h\\134\"\a\\317\e\\134",
 254                 .flags = ESCAPE_OCTAL,
 255         },{
 256                 .out = "\\134h\\134\"\a\\317\e\\134",
 257                 .flags = ESCAPE_ANY | ESCAPE_APPEND,
 258         },{
 259                 .out = "\\134h\\134\"\\007\\317\\033\\134",
 260                 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
 261         },{
 262                 .out = "\\134h\\134\"\a\\317\e\\134",
 263                 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
 264         },{
 265                 /* terminator */
 266         }}
 267 },{
 268         .in = "\eb \\C\007\"\x90\r]",
 269         .s1 = {{
 270                 .out = "\e\\142\\040\\134C\007\"\x90\\015]",
 271                 .flags = ESCAPE_OCTAL,
 272         },{
 273                 /* terminator */
 274         }}
 275 },{
 276         .in = "\007 \eb\"\x90\xCF\r",
 277         .s1 = {{
 278                 .out = "\007 \eb\"\x90\xCF\r",
 279                 .flags = ESCAPE_NA,
 280         },{
 281                 .out = "\007 \eb\"\x90\xCF\r",
 282                 .flags = ESCAPE_SPACE | ESCAPE_NA,
 283         },{
 284                 .out = "\007 \eb\"\x90\xCF\r",
 285                 .flags = ESCAPE_SPECIAL | ESCAPE_NA,
 286         },{
 287                 .out = "\007 \eb\"\x90\xCF\r",
 288                 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NA,
 289         },{
 290                 .out = "\007 \eb\"\x90\\317\r",
 291                 .flags = ESCAPE_OCTAL | ESCAPE_NA,
 292         },{
 293                 .out = "\007 \eb\"\x90\\317\r",
 294                 .flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NA,
 295         },{
 296                 .out = "\007 \eb\"\x90\\317\r",
 297                 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NA,
 298         },{
 299                 .out = "\007 \eb\"\x90\\317\r",
 300                 .flags = ESCAPE_ANY | ESCAPE_NA,
 301         },{
 302                 .out = "\007 \eb\"\x90\\xcf\r",
 303                 .flags = ESCAPE_HEX | ESCAPE_NA,
 304         },{
 305                 .out = "\007 \eb\"\x90\\xcf\r",
 306                 .flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NA,
 307         },{
 308                 .out = "\007 \eb\"\x90\\xcf\r",
 309                 .flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
 310         },{
 311                 .out = "\007 \eb\"\x90\\xcf\r",
 312                 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
 313         },{
 314                 /* terminator */
 315         }}
 316 },{
 317         .in = "\007 \eb\"\x90\xCF\r",
 318         .s1 = {{
 319                 .out = "\007 \eb\"\x90\xCF\r",
 320                 .flags = ESCAPE_NAP,
 321         },{
 322                 .out = "\007 \eb\"\x90\xCF\\r",
 323                 .flags = ESCAPE_SPACE | ESCAPE_NAP,
 324         },{
 325                 .out = "\007 \eb\"\x90\xCF\r",
 326                 .flags = ESCAPE_SPECIAL | ESCAPE_NAP,
 327         },{
 328                 .out = "\007 \eb\"\x90\xCF\\r",
 329                 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NAP,
 330         },{
 331                 .out = "\007 \eb\"\x90\\317\\015",
 332                 .flags = ESCAPE_OCTAL | ESCAPE_NAP,
 333         },{
 334                 .out = "\007 \eb\"\x90\\317\\r",
 335                 .flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NAP,
 336         },{
 337                 .out = "\007 \eb\"\x90\\317\\015",
 338                 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NAP,
 339         },{
 340                 .out = "\007 \eb\"\x90\\317\r",
 341                 .flags = ESCAPE_ANY | ESCAPE_NAP,
 342         },{
 343                 .out = "\007 \eb\"\x90\\xcf\\x0d",
 344                 .flags = ESCAPE_HEX | ESCAPE_NAP,
 345         },{
 346                 .out = "\007 \eb\"\x90\\xcf\\r",
 347                 .flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NAP,
 348         },{
 349                 .out = "\007 \eb\"\x90\\xcf\\x0d",
 350                 .flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
 351         },{
 352                 .out = "\007 \eb\"\x90\\xcf\\r",
 353                 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
 354         },{
 355                 /* terminator */
 356         }}
 357 },{
 358         /* terminator */
 359 }};
 360
 361 static const struct test_string strings_upper[] __initconst = {
 362         {
 363                 .in = "abcdefgh1234567890test",
 364                 .out = "ABCDEFGH1234567890TEST",
 365         },
 366         {
 367                 .in = "abCdeFgH1234567890TesT",
 368                 .out = "ABCDEFGH1234567890TEST",
 369         },
 370 };
 371
 372 static const struct test_string strings_lower[] __initconst = {
 373         {
 374                 .in = "ABCDEFGH1234567890TEST",
 375                 .out = "abcdefgh1234567890test",
 376         },
 377         {
 378                 .in = "abCdeFgH1234567890TesT",
 379                 .out = "abcdefgh1234567890test",
 380         },
 381 };
 382
 383 static __init const char *test_string_find_match(const struct test_string_2 *s2,
 384                                                  unsigned int flags)
 385 {
 386         const struct test_string_1 *s1 = s2->s1;
 387         unsigned int i;
 388
 389         if (!flags)
 390                 return s2->in;
 391
 392         /* Test cases are NULL-aware */
 393         flags &= ~ESCAPE_NULL;
 394
 395         /* ESCAPE_OCTAL has a higher priority */
 396         if (flags & ESCAPE_OCTAL)
 397                 flags &= ~ESCAPE_HEX;
 398
 399         for (i = 0; i < TEST_STRING_2_MAX_S1 && s1->out; i++, s1++)
 400                 if (s1->flags == flags)
 401                         return s1->out;
 402         return NULL;
 403 }
 404
 405 static __init void
 406 test_string_escape_overflow(const char *in, int p, unsigned int flags, const char *esc,
 407                             int q_test, const char *name)
 408 {
 409         int q_real;
 410
 411         q_real = string_escape_mem(in, p, NULL, 0, flags, esc);
 412         if (q_real != q_test)
 413                 pr_warn("Test '%s' failed: flags = %#x, osz = 0, expected %d, got %d\n",
 414                         name, flags, q_test, q_real);
 415 }
 416
 417 static __init void test_string_escape(const char *name,
 418                                       const struct test_string_2 *s2,
 419                                       unsigned int flags, const char *esc)
 420 {
 421         size_t out_size = 512;
 422         char *out_test = kmalloc(out_size, GFP_KERNEL);
 423         char *out_real = kmalloc(out_size, GFP_KERNEL);
 424         char *in = kmalloc(256, GFP_KERNEL);
 425         int p = 0, q_test = 0;
 426         int q_real;
 427
 428         if (!out_test || !out_real || !in)
 429                 goto out;
 430
 431         for (; s2->in; s2++) {
 432                 const char *out;
 433                 int len;
 434
 435                 /* NULL injection */
 436                 if (flags & ESCAPE_NULL) {
 437                         in[p++] = '\0';
 438                         /* '\0' passes isascii() test */
 439                         if (flags & ESCAPE_NA && !(flags & ESCAPE_APPEND && esc)) {
 440                                 out_test[q_test++] = '\0';
 441                         } else {
 442                                 out_test[q_test++] = '\\';
 443                                 out_test[q_test++] = '0';
 444                         }
 445                 }
 446
 447                 /* Don't try strings that have no output */
 448                 out = test_string_find_match(s2, flags);
 449                 if (!out)
 450                         continue;
 451
 452                 /* Copy string to in buffer */
 453                 len = strlen(s2->in);
 454                 memcpy(&in[p], s2->in, len);
 455                 p += len;
 456
 457                 /* Copy expected result for given flags */
 458                 len = strlen(out);
 459                 memcpy(&out_test[q_test], out, len);
 460                 q_test += len;
 461         }
 462
 463         q_real = string_escape_mem(in, p, out_real, out_size, flags, esc);
 464
 465         test_string_check_buf(name, flags, in, p, out_real, q_real, out_test,
 466                               q_test);
 467
 468         test_string_escape_overflow(in, p, flags, esc, q_test, name);
 469
 470 out:
 471         kfree(in);
 472         kfree(out_real);
 473         kfree(out_test);
 474 }
 475
 476 #define string_get_size_maxbuf 16
 477 #define test_string_get_size_one(size, blk_size, exp_result10, exp_result2)    \
 478         do {                                                                   \
 479                 BUILD_BUG_ON(sizeof(exp_result10) >= string_get_size_maxbuf);  \
 480                 BUILD_BUG_ON(sizeof(exp_result2) >= string_get_size_maxbuf);   \
 481                 __test_string_get_size((size), (blk_size), (exp_result10),     \
 482                                        (exp_result2));                         \
 483         } while (0)
 484
 485
 486 static __init void test_string_get_size_check(const char *units,
 487                                               const char *exp,
 488                                               char *res,
 489                                               const u64 size,
 490                                               const u64 blk_size)
 491 {
 492         if (!memcmp(res, exp, strlen(exp) + 1))
 493                 return;
 494
 495         res[string_get_size_maxbuf - 1] = '\0';
 496
 497         pr_warn("Test 'test_string_get_size' failed!\n");
 498         pr_warn("string_get_size(size = %llu, blk_size = %llu, units = %s)\n",
 499                 size, blk_size, units);
 500         pr_warn("expected: '%s', got '%s'\n", exp, res);
 501 }
 502
 503 static __init void __test_string_get_size(const u64 size, const u64 blk_size,
 504                                           const char *exp_result10,
 505                                           const char *exp_result2)
 506 {
 507         char buf10[string_get_size_maxbuf];
 508         char buf2[string_get_size_maxbuf];
 509
 510         string_get_size(size, blk_size, STRING_UNITS_10, buf10, sizeof(buf10));
 511         string_get_size(size, blk_size, STRING_UNITS_2, buf2, sizeof(buf2));
 512
 513         test_string_get_size_check("STRING_UNITS_10", exp_result10, buf10,
 514                                    size, blk_size);
 515
 516         test_string_get_size_check("STRING_UNITS_2", exp_result2, buf2,
 517                                    size, blk_size);
 518 }
 519
 520 static __init void test_string_get_size(void)
 521 {
 522         /* small values */
 523         test_string_get_size_one(0, 512, "0 B", "0 B");
 524         test_string_get_size_one(1, 512, "512 B", "512 B");
 525         test_string_get_size_one(1100, 1, "1.10 kB", "1.07 KiB");
 526
 527         /* normal values */
 528         test_string_get_size_one(16384, 512, "8.39 MB", "8.00 MiB");
 529         test_string_get_size_one(500118192, 512, "256 GB", "238 GiB");
 530         test_string_get_size_one(8192, 4096, "33.6 MB", "32.0 MiB");
 531
 532         /* weird block sizes */
 533         test_string_get_size_one(3000, 1900, "5.70 MB", "5.44 MiB");
 534
 535         /* huge values */
 536         test_string_get_size_one(U64_MAX, 4096, "75.6 ZB", "64.0 ZiB");
 537         test_string_get_size_one(4096, U64_MAX, "75.6 ZB", "64.0 ZiB");
 538 }
 539
 540 static void __init test_string_upper_lower(void)
 541 {
 542         char *dst;
 543         int i;
 544
 545         for (i = 0; i < ARRAY_SIZE(strings_upper); i++) {
 546                 const char *s = strings_upper[i].in;
 547                 int len = strlen(strings_upper[i].in) + 1;
 548
 549                 dst = kmalloc(len, GFP_KERNEL);
 550                 if (!dst)
 551                         return;
 552
 553                 string_upper(dst, s);
 554                 if (memcmp(dst, strings_upper[i].out, len)) {
 555                         pr_warn("Test 'string_upper' failed : expected %s, got %s!\n",
 556                                 strings_upper[i].out, dst);
 557                         kfree(dst);
 558                         return;
 559                 }
 560                 kfree(dst);
 561         }
 562
 563         for (i = 0; i < ARRAY_SIZE(strings_lower); i++) {
 564                 const char *s = strings_lower[i].in;
 565                 int len = strlen(strings_lower[i].in) + 1;
 566
 567                 dst = kmalloc(len, GFP_KERNEL);
 568                 if (!dst)
 569                         return;
 570
 571                 string_lower(dst, s);
 572                 if (memcmp(dst, strings_lower[i].out, len)) {
 573                         pr_warn("Test 'string_lower failed : : expected %s, got %s!\n",
 574                                 strings_lower[i].out, dst);
 575                         kfree(dst);
 576                         return;
 577                 }
 578                 kfree(dst);
 579         }
 580 }
 581
 582 static int __init test_string_helpers_init(void)
 583 {
 584         unsigned int i;
 585
 586         pr_info("Running tests...\n");
 587         for (i = 0; i < UNESCAPE_ALL_MASK + 1; i++)
 588                 test_string_unescape("unescape", i, false);
 589         test_string_unescape("unescape inplace",
 590                              get_random_u32_below(UNESCAPE_ANY + 1), true);
 591
 592         /* Without dictionary */
 593         for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
 594                 test_string_escape("escape 0", escape0, i, TEST_STRING_2_DICT_0);
 595
 596         /* With dictionary */
 597         for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
 598                 test_string_escape("escape 1", escape1, i, TEST_STRING_2_DICT_1);
 599
 600         /* Test string_get_size() */
 601         test_string_get_size();
 602
 603         /* Test string upper(), string_lower() */
 604         test_string_upper_lower();
 605
 606         return -EINVAL;
 607 }
 608 module_init(test_string_helpers_init);
 609 MODULE_LICENSE("Dual BSD/GPL");