lib/tdb/tools/tdbtorture.c

   1 /* this tests tdb by doing lots of ops from several simultaneous
   2    writers - that stresses the locking code.
   3 */
   4
   5 #include "replace.h"
   6 #include "system/time.h"
   7 #include "system/wait.h"
   8 #include "system/filesys.h"
   9 #include "tdb.h"
  10
  11 #ifdef HAVE_GETOPT_H
  12 #include <getopt.h>
  13 #endif
  14
  15
  16 #define REOPEN_PROB 30
  17 #define DELETE_PROB 8
  18 #define STORE_PROB 4
  19 #define APPEND_PROB 6
  20 #define TRANSACTION_PROB 10
  21 #define TRANSACTION_PREPARE_PROB 2
  22 #define LOCKSTORE_PROB 5
  23 #define TRAVERSE_PROB 20
  24 #define TRAVERSE_READ_PROB 20
  25 #define CULL_PROB 100
  26 #define KEYLEN 3
  27 #define DATALEN 100
  28
  29 static struct tdb_context *db;
  30 static int in_transaction;
  31 static int error_count;
  32 static int always_transaction = 0;
  33 static int hash_size = 2;
  34 static unsigned loopnum;
  35 static int count_pipe;
  36 static bool mutex = false;
  37 static struct tdb_logging_context log_ctx;
  38
  39 #ifdef PRINTF_ATTRIBUTE
  40 static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
  41 #endif
  42 static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...)
  43 {
  44         va_list ap;
  45
  46         /* trace level messages do not indicate an error */
  47         if (level != TDB_DEBUG_TRACE) {
  48                 error_count++;
  49         }
  50
  51         va_start(ap, format);
  52         vfprintf(stdout, format, ap);
  53         va_end(ap);
  54         fflush(stdout);
  55 #if 0
  56         if (level != TDB_DEBUG_TRACE) {
  57                 char *ptr;
  58                 signal(SIGUSR1, SIG_IGN);
  59                 asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
  60                 system(ptr);
  61                 free(ptr);
  62         }
  63 #endif
  64 }
  65
  66 static void fatal(const char *why)
  67 {
  68         perror(why);
  69         error_count++;
  70 }
  71
  72 static char *randbuf(int len)
  73 {
  74         char *buf;
  75         int i;
  76         buf = (char *)malloc(len+1);
  77
  78         for (i=0;i<len;i++) {
  79                 buf[i] = 'a' + (rand() % 26);
  80         }
  81         buf[i] = 0;
  82         return buf;
  83 }
  84
  85 static int cull_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
  86                          void *state)
  87 {
  88 #if CULL_PROB
  89         if (random() % CULL_PROB == 0) {
  90                 tdb_delete(tdb, key);
  91         }
  92 #endif
  93         return 0;
  94 }
  95
  96 static bool do_transaction(void)
  97 {
  98 #if TRANSACTION_PROB
  99         if (mutex) {
 100                 return false;
 101         }
 102         if (random() % TRANSACTION_PROB == 0) {
 103                 return true;
 104         }
 105 #endif
 106         return false;
 107 }
 108
 109 static void addrec_db(void)
 110 {
 111         int klen, dlen;
 112         char *k, *d;
 113         TDB_DATA key, data;
 114
 115         klen = 1 + (rand() % KEYLEN);
 116         dlen = 1 + (rand() % DATALEN);
 117
 118         k = randbuf(klen);
 119         d = randbuf(dlen);
 120
 121         key.dptr = (unsigned char *)k;
 122         key.dsize = klen+1;
 123
 124         data.dptr = (unsigned char *)d;
 125         data.dsize = dlen+1;
 126
 127 #if REOPEN_PROB
 128         if (in_transaction == 0 && random() % REOPEN_PROB == 0) {
 129                 tdb_reopen_all(0);
 130                 goto next;
 131         }
 132 #endif
 133
 134         if (in_transaction == 0 &&
 135             (always_transaction || do_transaction())) {
 136                 if (tdb_transaction_start(db) != 0) {
 137                         fatal("tdb_transaction_start failed");
 138                 }
 139                 in_transaction++;
 140                 goto next;
 141         }
 142         if (in_transaction && do_transaction()) {
 143                 if (random() % TRANSACTION_PREPARE_PROB == 0) {
 144                         if (tdb_transaction_prepare_commit(db) != 0) {
 145                                 fatal("tdb_transaction_prepare_commit failed");
 146                         }
 147                 }
 148                 if (tdb_transaction_commit(db) != 0) {
 149                         fatal("tdb_transaction_commit failed");
 150                 }
 151                 in_transaction--;
 152                 goto next;
 153         }
 154         if (in_transaction && do_transaction()) {
 155                 if (tdb_transaction_cancel(db) != 0) {
 156                         fatal("tdb_transaction_cancel failed");
 157                 }
 158                 in_transaction--;
 159                 goto next;
 160         }
 161
 162 #if DELETE_PROB
 163         if (random() % DELETE_PROB == 0) {
 164                 tdb_delete(db, key);
 165                 goto next;
 166         }
 167 #endif
 168
 169 #if STORE_PROB
 170         if (random() % STORE_PROB == 0) {
 171                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 172                         fatal("tdb_store failed");
 173                 }
 174                 goto next;
 175         }
 176 #endif
 177
 178 #if APPEND_PROB
 179         if (random() % APPEND_PROB == 0) {
 180                 if (tdb_append(db, key, data) != 0) {
 181                         fatal("tdb_append failed");
 182                 }
 183                 goto next;
 184         }
 185 #endif
 186
 187 #if LOCKSTORE_PROB
 188         if (random() % LOCKSTORE_PROB == 0) {
 189                 tdb_chainlock(db, key);
 190                 data = tdb_fetch(db, key);
 191                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 192                         fatal("tdb_store failed");
 193                 }
 194                 if (data.dptr) free(data.dptr);
 195                 tdb_chainunlock(db, key);
 196                 goto next;
 197         }
 198 #endif
 199
 200 #if TRAVERSE_PROB
 201         if (random() % TRAVERSE_PROB == 0) {
 202                 tdb_traverse(db, cull_traverse, NULL);
 203                 goto next;
 204         }
 205 #endif
 206
 207 #if TRAVERSE_READ_PROB
 208         if (random() % TRAVERSE_READ_PROB == 0) {
 209                 tdb_traverse_read(db, NULL, NULL);
 210                 goto next;
 211         }
 212 #endif
 213
 214         data = tdb_fetch(db, key);
 215         if (data.dptr) free(data.dptr);
 216
 217 next:
 218         free(k);
 219         free(d);
 220 }
 221
 222 static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
 223                        void *state)
 224 {
 225         tdb_delete(tdb, key);
 226         return 0;
 227 }
 228
 229 static void usage(void)
 230 {
 231         printf("Usage: tdbtorture [-t] [-k] [-m] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-H HASH_SIZE]\n");
 232         exit(0);
 233 }
 234
 235 static void send_count_and_suicide(int sig)
 236 {
 237         ssize_t ret;
 238
 239         /* This ensures our successor can continue where we left off. */
 240         do {
 241                 ret = write(count_pipe, &loopnum, sizeof(loopnum));
 242         } while (ret == -1 && errno == EINTR);
 243         /* This gives a unique signature. */
 244         kill(getpid(), SIGUSR2);
 245 }
 246
 247 static int run_child(const char *filename, int i, int seed, unsigned num_loops, unsigned start)
 248 {
 249         int tdb_flags = TDB_DEFAULT|TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH;
 250
 251         if (mutex) {
 252                 tdb_flags |= TDB_MUTEX_LOCKING;
 253         }
 254
 255         db = tdb_open_ex(filename, hash_size, tdb_flags,
 256                          O_RDWR | O_CREAT, 0600, &log_ctx, NULL);
 257         if (!db) {
 258                 fatal("db open failed");
 259         }
 260
 261         srand(seed + i);
 262         srandom(seed + i);
 263
 264         /* Set global, then we're ready to handle being killed. */
 265         loopnum = start;
 266         signal(SIGUSR1, send_count_and_suicide);
 267
 268         for (;loopnum<num_loops && error_count == 0;loopnum++) {
 269                 addrec_db();
 270         }
 271
 272         if (error_count == 0) {
 273                 tdb_traverse_read(db, NULL, NULL);
 274                 if (always_transaction) {
 275                         while (in_transaction) {
 276                                 tdb_transaction_cancel(db);
 277                                 in_transaction--;
 278                         }
 279                         if (tdb_transaction_start(db) != 0)
 280                                 fatal("tdb_transaction_start failed");
 281                 }
 282                 tdb_traverse(db, traverse_fn, NULL);
 283                 tdb_traverse(db, traverse_fn, NULL);
 284                 if (always_transaction) {
 285                         if (tdb_transaction_commit(db) != 0)
 286                                 fatal("tdb_transaction_commit failed");
 287                 }
 288         }
 289
 290         tdb_close(db);
 291
 292         return (error_count < 100 ? error_count : 100);
 293 }
 294
 295 static char *test_path(const char *filename)
 296 {
 297         const char *prefix = getenv("TEST_DATA_PREFIX");
 298
 299         if (prefix) {
 300                 char *path = NULL;
 301                 int ret;
 302
 303                 ret = asprintf(&path, "%s/%s", prefix, filename);
 304                 if (ret == -1) {
 305                         return NULL;
 306                 }
 307                 return path;
 308         }
 309
 310         return strdup(filename);
 311 }
 312
 313 int main(int argc, char * const *argv)
 314 {
 315         int i, seed = -1;
 316         int num_loops = 5000;
 317         int num_procs = 3;
 318         int c, pfds[2];
 319         extern char *optarg;
 320         pid_t *pids;
 321         int kill_random = 0;
 322         int *done;
 323         char *test_tdb;
 324
 325         log_ctx.log_fn = tdb_log;
 326
 327         while ((c = getopt(argc, argv, "n:l:s:H:thkm")) != -1) {
 328                 switch (c) {
 329                 case 'n':
 330                         num_procs = strtol(optarg, NULL, 0);
 331                         break;
 332                 case 'l':
 333                         num_loops = strtol(optarg, NULL, 0);
 334                         break;
 335                 case 'H':
 336                         hash_size = strtol(optarg, NULL, 0);
 337                         break;
 338                 case 's':
 339                         seed = strtol(optarg, NULL, 0);
 340                         break;
 341                 case 't':
 342                         always_transaction = 1;
 343                         break;
 344                 case 'k':
 345                         kill_random = 1;
 346                         break;
 347                 case 'm':
 348                         mutex = tdb_runtime_check_for_robust_mutexes();
 349                         if (!mutex) {
 350                                 printf("tdb_runtime_check_for_robust_mutexes() returned false\n");
 351                                 exit(1);
 352                         }
 353                         break;
 354                 default:
 355                         usage();
 356                 }
 357         }
 358
 359         test_tdb = test_path("torture.tdb");
 360
 361         unlink(test_tdb);
 362
 363         if (seed == -1) {
 364                 seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
 365         }
 366
 367         printf("Testing with %d processes, %d loops, %d hash_size, seed=%d%s\n",
 368                num_procs, num_loops, hash_size, seed,
 369                (always_transaction ? " (all within transactions)" : ""));
 370
 371         if (num_procs == 1 && !kill_random) {
 372                 /* Don't fork for this case, makes debugging easier. */
 373                 error_count = run_child(test_tdb, 0, seed, num_loops, 0);
 374                 goto done;
 375         }
 376
 377         pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
 378         if (pids == NULL) {
 379                 perror("Unable to allocate memory for pids");
 380                 exit(1);
 381         }
 382         done = (int *)calloc(sizeof(int), num_procs);
 383         if (done == NULL) {
 384                 perror("Unable to allocate memory for done");
 385                 exit(1);
 386         }
 387
 388         if (pipe(pfds) != 0) {
 389                 perror("Creating pipe");
 390                 exit(1);
 391         }
 392         count_pipe = pfds[1];
 393
 394         for (i=0;i<num_procs;i++) {
 395                 if ((pids[i]=fork()) == 0) {
 396                         close(pfds[0]);
 397                         exit(run_child(test_tdb, i, seed, num_loops, 0));
 398                 }
 399         }
 400
 401         while (num_procs) {
 402                 int status, j;
 403                 pid_t pid;
 404
 405                 if (error_count != 0) {
 406                         /* try and stop the test on any failure */
 407                         for (j=0;j<num_procs;j++) {
 408                                 if (pids[j] != 0) {
 409                                         kill(pids[j], SIGTERM);
 410                                 }
 411                         }
 412                 }
 413
 414                 pid = waitpid(-1, &status, kill_random ? WNOHANG : 0);
 415                 if (pid == 0) {
 416                         struct timeval tv;
 417
 418                         /* Sleep for 1/10 second. */
 419                         tv.tv_sec = 0;
 420                         tv.tv_usec = 100000;
 421                         select(0, NULL, NULL, NULL, &tv);
 422
 423                         /* Kill someone. */
 424                         kill(pids[random() % num_procs], SIGUSR1);
 425                         continue;
 426                 }
 427
 428                 if (pid == -1) {
 429                         perror("failed to wait for child\n");
 430                         exit(1);
 431                 }
 432
 433                 for (j=0;j<num_procs;j++) {
 434                         if (pids[j] == pid) break;
 435                 }
 436                 if (j == num_procs) {
 437                         printf("unknown child %d exited!?\n", (int)pid);
 438                         exit(1);
 439                 }
 440                 if (WIFSIGNALED(status)) {
 441                         if (WTERMSIG(status) == SIGUSR2
 442                             || WTERMSIG(status) == SIGUSR1) {
 443                                 /* SIGUSR2 means they wrote to pipe. */
 444                                 if (WTERMSIG(status) == SIGUSR2) {
 445                                         ssize_t ret;
 446
 447                                         do {
 448                                                 ret = read(pfds[0], &done[j],
 449                                                            sizeof(done[j]));
 450                                         } while (ret == -1 && errno == EINTR);
 451                                 }
 452                                 pids[j] = fork();
 453                                 if (pids[j] == 0)
 454                                         exit(run_child(test_tdb, j, seed,
 455                                                        num_loops, done[j]));
 456                                 printf("Restarting child %i for %u-%u\n",
 457                                        j, done[j], num_loops);
 458                                 continue;
 459                         }
 460                         printf("child %d exited with signal %d\n",
 461                                (int)pid, WTERMSIG(status));
 462                         error_count++;
 463                 } else {
 464                         if (WEXITSTATUS(status) != 0) {
 465                                 printf("child %d exited with status %d\n",
 466                                        (int)pid, WEXITSTATUS(status));
 467                                 error_count++;
 468                         }
 469                 }
 470                 ARRAY_DEL_ELEMENT(pids, j, num_procs);
 471                 num_procs--;
 472         }
 473
 474         free(pids);
 475
 476 done:
 477         if (error_count == 0) {
 478                 int tdb_flags = TDB_DEFAULT;
 479
 480                 if (mutex) {
 481                         tdb_flags |= TDB_NOLOCK;
 482                 }
 483
 484                 db = tdb_open_ex(test_tdb, hash_size, tdb_flags,
 485                                  O_RDWR, 0, &log_ctx, NULL);
 486                 if (!db) {
 487                         fatal("db open failed\n");
 488                         exit(1);
 489                 }
 490                 if (tdb_check(db, NULL, NULL) == -1) {
 491                         printf("db check failed\n");
 492                         exit(1);
 493                 }
 494                 tdb_close(db);
 495                 printf("OK\n");
 496         }
 497
 498         free(test_tdb);
 499         return error_count;
 500 }