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