lib/ntdb/tools/ntdbtorture.c

   1 /* this tests ntdb by doing lots of ops from several simultaneous
   2    writers - that stresses the locking code.
   3 */
   4
   5 #include "config.h"
   6 #include "ntdb.h"
   7 #include <ccan/err/err.h>
   8 #ifdef HAVE_LIBREPLACE
   9 #include <replace.h>
  10 #else
  11 #include <stdlib.h>
  12 #include <getopt.h>
  13 #include <stdarg.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include <errno.h>
  17 #include <unistd.h>
  18 #include <sys/types.h>
  19 #include <fcntl.h>
  20 #include <time.h>
  21 #include <sys/wait.h>
  22 #endif
  23
  24 //#define REOPEN_PROB 30
  25 #define DELETE_PROB 8
  26 #define STORE_PROB 4
  27 #define APPEND_PROB 6
  28 #define TRANSACTION_PROB 10
  29 #define TRANSACTION_PREPARE_PROB 2
  30 #define LOCKSTORE_PROB 5
  31 #define TRAVERSE_PROB 20
  32 #define TRAVERSE_MOD_PROB 100
  33 #define TRAVERSE_ABORT_PROB 500
  34 #define CULL_PROB 100
  35 #define KEYLEN 3
  36 #define DATALEN 100
  37
  38 static struct ntdb_context *db;
  39 static int in_transaction;
  40 static int in_traverse;
  41 static int error_count;
  42 #if TRANSACTION_PROB
  43 static int always_transaction = 0;
  44 #endif
  45 static int loopnum;
  46 static int count_pipe;
  47 static union ntdb_attribute log_attr;
  48 static union ntdb_attribute seed_attr;
  49 static union ntdb_attribute hsize_attr;
  50
  51 static void ntdb_log(struct ntdb_context *ntdb,
  52                     enum ntdb_log_level level,
  53                     enum NTDB_ERROR ecode,
  54                     const char *message,
  55                     void *data)
  56 {
  57         printf("ntdb:%s:%s:%s\n",
  58                ntdb_name(ntdb), ntdb_errorstr(ecode), message);
  59         fflush(stdout);
  60 #if 0
  61         {
  62                 char str[200];
  63                 signal(SIGUSR1, SIG_IGN);
  64                 sprintf(str,"xterm -e gdb /proc/%u/exe %u", (unsigned int)getpid(), (unsigned int)getpid());
  65                 system(str);
  66         }
  67 #endif
  68 }
  69
  70 #include "../private.h"
  71
  72 static void segv_handler(int sig, siginfo_t *info, void *p)
  73 {
  74         char string[100];
  75
  76         sprintf(string, "%u: death at %p (map_ptr %p, map_size %zu)\n",
  77                 (unsigned int)getpid(), info->si_addr, db->file->map_ptr,
  78                 (size_t)db->file->map_size);
  79         if (write(2, string, strlen(string)) > 0)
  80                 sleep(60);
  81         _exit(11);
  82 }
  83
  84 static void warn_on_err(enum NTDB_ERROR e, struct ntdb_context *ntdb,
  85                         const char *why)
  86 {
  87         if (e != NTDB_SUCCESS) {
  88                 fprintf(stderr, "%u:%s:%s\n", (unsigned int)getpid(), why,
  89                         ntdb ? ntdb_errorstr(e) : "(no ntdb)");
  90                 error_count++;
  91         }
  92 }
  93
  94 static char *randbuf(int len)
  95 {
  96         char *buf;
  97         int i;
  98         buf = (char *)malloc(len+1);
  99         if (buf == NULL) {
 100                 perror("randbuf: unable to allocate memory for buffer.\n");
 101                 exit(1);
 102         }
 103
 104         for (i=0;i<len;i++) {
 105                 buf[i] = 'a' + (rand() % 26);
 106         }
 107         buf[i] = 0;
 108         return buf;
 109 }
 110
 111 static void addrec_db(void);
 112 static int modify_traverse(struct ntdb_context *ntdb, NTDB_DATA key, NTDB_DATA dbuf,
 113                            void *state)
 114 {
 115 #if CULL_PROB
 116         if (random() % CULL_PROB == 0) {
 117                 ntdb_delete(ntdb, key);
 118         }
 119 #endif
 120
 121 #if TRAVERSE_MOD_PROB
 122         if (random() % TRAVERSE_MOD_PROB == 0) {
 123                 addrec_db();
 124         }
 125 #endif
 126
 127 #if TRAVERSE_ABORT_PROB
 128         if (random() % TRAVERSE_ABORT_PROB == 0)
 129                 return 1;
 130 #endif
 131
 132         return 0;
 133 }
 134
 135 static void addrec_db(void)
 136 {
 137         int klen, dlen;
 138         char *k, *d;
 139         NTDB_DATA key, data;
 140         enum NTDB_ERROR e;
 141
 142         klen = 1 + (rand() % KEYLEN);
 143         dlen = 1 + (rand() % DATALEN);
 144
 145         k = randbuf(klen);
 146         d = randbuf(dlen);
 147
 148         key.dptr = (unsigned char *)k;
 149         key.dsize = klen+1;
 150
 151         data.dptr = (unsigned char *)d;
 152         data.dsize = dlen+1;
 153
 154 #if REOPEN_PROB
 155         if (in_traverse == 0 && in_transaction == 0 && random() % REOPEN_PROB == 0) {
 156                 ntdb_reopen_all(0);
 157                 goto next;
 158         }
 159 #endif
 160
 161 #if TRANSACTION_PROB
 162         if (in_traverse == 0 && in_transaction == 0 && (always_transaction || random() % TRANSACTION_PROB == 0)) {
 163                 e = ntdb_transaction_start(db);
 164                 warn_on_err(e, db, "ntdb_transaction_start failed");
 165                 in_transaction++;
 166                 goto next;
 167         }
 168         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
 169                 if (random() % TRANSACTION_PREPARE_PROB == 0) {
 170                         e = ntdb_transaction_prepare_commit(db);
 171                         warn_on_err(e, db, "ntdb_transaction_prepare_commit failed");
 172                 }
 173                 e = ntdb_transaction_commit(db);
 174                 warn_on_err(e, db, "ntdb_transaction_commit failed");
 175                 in_transaction--;
 176                 goto next;
 177         }
 178
 179         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
 180                 ntdb_transaction_cancel(db);
 181                 in_transaction--;
 182                 goto next;
 183         }
 184 #endif
 185
 186 #if DELETE_PROB
 187         if (random() % DELETE_PROB == 0) {
 188                 ntdb_delete(db, key);
 189                 goto next;
 190         }
 191 #endif
 192
 193 #if STORE_PROB
 194         if (random() % STORE_PROB == 0) {
 195                 e = ntdb_store(db, key, data, NTDB_REPLACE);
 196                 warn_on_err(e, db, "ntdb_store failed");
 197                 goto next;
 198         }
 199 #endif
 200
 201 #if APPEND_PROB
 202         if (random() % APPEND_PROB == 0) {
 203                 e = ntdb_append(db, key, data);
 204                 warn_on_err(e, db, "ntdb_append failed");
 205                 goto next;
 206         }
 207 #endif
 208
 209 #if LOCKSTORE_PROB
 210         if (random() % LOCKSTORE_PROB == 0) {
 211                 ntdb_chainlock(db, key);
 212                 if (ntdb_fetch(db, key, &data) != NTDB_SUCCESS) {
 213                         data.dsize = 0;
 214                         data.dptr = NULL;
 215                 }
 216                 e = ntdb_store(db, key, data, NTDB_REPLACE);
 217                 warn_on_err(e, db, "ntdb_store failed");
 218                 if (data.dptr) free(data.dptr);
 219                 ntdb_chainunlock(db, key);
 220                 goto next;
 221         }
 222 #endif
 223
 224 #if TRAVERSE_PROB
 225         /* FIXME: recursive traverses break transactions? */
 226         if (in_traverse == 0 && random() % TRAVERSE_PROB == 0) {
 227                 in_traverse++;
 228                 ntdb_traverse(db, modify_traverse, NULL);
 229                 in_traverse--;
 230                 goto next;
 231         }
 232 #endif
 233
 234         if (ntdb_fetch(db, key, &data) == NTDB_SUCCESS)
 235                 free(data.dptr);
 236
 237 next:
 238         free(k);
 239         free(d);
 240 }
 241
 242 static int traverse_fn(struct ntdb_context *ntdb, NTDB_DATA key, NTDB_DATA dbuf,
 243                        void *state)
 244 {
 245         ntdb_delete(ntdb, key);
 246         return 0;
 247 }
 248
 249 static void usage(void)
 250 {
 251         printf("Usage: ntdbtorture"
 252 #if TRANSACTION_PROB
 253                " [-t]"
 254 #endif
 255                " [-k] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-S] [-H HASH_SIZE]\n");
 256         exit(0);
 257 }
 258
 259 static void send_count_and_suicide(int sig)
 260 {
 261         /* This ensures our successor can continue where we left off. */
 262         if (write(count_pipe, &loopnum, sizeof(loopnum)) != sizeof(loopnum))
 263                 exit(2);
 264         /* This gives a unique signature. */
 265         kill(getpid(), SIGUSR2);
 266 }
 267
 268 static int run_child(const char *filename, int i, int seed, unsigned num_loops,
 269                      unsigned start, int ntdb_flags)
 270 {
 271         struct sigaction act = { .sa_sigaction = segv_handler,
 272                                  .sa_flags = SA_SIGINFO };
 273         sigaction(11, &act, NULL);
 274
 275         db = ntdb_open(filename, ntdb_flags, O_RDWR | O_CREAT, 0600,
 276                       &log_attr);
 277         if (!db) {
 278                 fprintf(stderr, "%u:%s:%s\n", (unsigned int)getpid(), filename,
 279                         "db open failed");
 280                 exit(1);
 281         }
 282
 283 #if 0
 284         if (i == 0) {
 285                 printf("pid %u\n", (unsigned int)getpid());
 286                 sleep(9);
 287         } else
 288                 sleep(10);
 289 #endif
 290
 291         srand(seed + i);
 292         srandom(seed + i);
 293
 294         /* Set global, then we're ready to handle being killed. */
 295         loopnum = start;
 296         signal(SIGUSR1, send_count_and_suicide);
 297
 298         for (;loopnum<num_loops && error_count == 0;loopnum++) {
 299                 addrec_db();
 300         }
 301
 302         if (error_count == 0) {
 303                 enum NTDB_ERROR e;
 304
 305                 ntdb_traverse(db, NULL, NULL);
 306 #if TRANSACTION_PROB
 307                 if (always_transaction) {
 308                         while (in_transaction) {
 309                                 ntdb_transaction_cancel(db);
 310                                 in_transaction--;
 311                         }
 312                         e = ntdb_transaction_start(db);
 313                         if (e) {
 314                                 warn_on_err(e, db,
 315                                             "ntdb_transaction_start failed");
 316                                 exit(1);
 317                         }
 318                 }
 319 #endif
 320                 ntdb_traverse(db, traverse_fn, NULL);
 321                 ntdb_traverse(db, traverse_fn, NULL);
 322
 323 #if TRANSACTION_PROB
 324                 if (always_transaction) {
 325                         e = ntdb_transaction_commit(db);
 326                         warn_on_err(e, db, "ntdb_transaction_commit failed");
 327                 }
 328 #endif
 329         }
 330
 331         ntdb_close(db);
 332
 333         return (error_count < 100 ? error_count : 100);
 334 }
 335
 336 static char *test_path(const char *filename)
 337 {
 338         const char *prefix = getenv("TEST_DATA_PREFIX");
 339
 340         if (prefix) {
 341                 char *path = NULL;
 342                 int ret;
 343
 344                 ret = asprintf(&path, "%s/%s", prefix, filename);
 345                 if (ret == -1) {
 346                         return NULL;
 347                 }
 348                 return path;
 349         }
 350
 351         return strdup(filename);
 352 }
 353
 354 int main(int argc, char * const *argv)
 355 {
 356         int i, seed = -1;
 357         int num_loops = 5000;
 358         int num_procs = 3;
 359         int c, pfds[2];
 360         extern char *optarg;
 361         pid_t *pids;
 362         int kill_random = 0;
 363         int *done;
 364         int ntdb_flags = NTDB_DEFAULT;
 365         char *test_ntdb;
 366         enum NTDB_ERROR e;
 367
 368         log_attr.base.attr = NTDB_ATTRIBUTE_LOG;
 369         log_attr.base.next = &seed_attr;
 370         log_attr.log.fn = ntdb_log;
 371         seed_attr.base.attr = NTDB_ATTRIBUTE_SEED;
 372         seed_attr.base.next = &hsize_attr;
 373         hsize_attr.base.attr = NTDB_ATTRIBUTE_HASHSIZE;
 374         hsize_attr.base.next = NULL;
 375         hsize_attr.hashsize.size = 2; /* stress it by default. */
 376
 377         while ((c = getopt(argc, argv, "n:l:s:thkSH:")) != -1) {
 378                 switch (c) {
 379                 case 'n':
 380                         num_procs = strtol(optarg, NULL, 0);
 381                         break;
 382                 case 'l':
 383                         num_loops = strtol(optarg, NULL, 0);
 384                         break;
 385                 case 's':
 386                         seed = strtol(optarg, NULL, 0);
 387                         break;
 388                 case 'S':
 389                         ntdb_flags = NTDB_NOSYNC;
 390                         break;
 391                 case 't':
 392 #if TRANSACTION_PROB
 393                         always_transaction = 1;
 394 #else
 395                         fprintf(stderr, "Transactions not supported\n");
 396                         usage();
 397 #endif
 398                         break;
 399                 case 'k':
 400                         kill_random = 1;
 401                         break;
 402                 case 'H':
 403                         hsize_attr.hashsize.size = strtol(optarg, NULL, 0);
 404                         break;
 405                 default:
 406                         usage();
 407                 }
 408         }
 409
 410         test_ntdb = test_path("torture.ntdb");
 411
 412         unlink(test_ntdb);
 413
 414         if (seed == -1) {
 415                 seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
 416         }
 417         seed_attr.seed.seed = (((uint64_t)seed) << 32) | seed;
 418
 419         if (num_procs == 1 && !kill_random) {
 420                 /* Don't fork for this case, makes debugging easier. */
 421                 error_count = run_child(test_ntdb, 0, seed, num_loops, 0,
 422                                         ntdb_flags);
 423                 goto done;
 424         }
 425
 426         pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
 427         done = (int *)calloc(sizeof(int), num_procs);
 428
 429         if (pipe(pfds) != 0) {
 430                 perror("Creating pipe");
 431                 exit(1);
 432         }
 433         count_pipe = pfds[1];
 434
 435         for (i=0;i<num_procs;i++) {
 436                 if ((pids[i]=fork()) == 0) {
 437                         close(pfds[0]);
 438                         if (i == 0) {
 439                                 printf("testing with %d processes, %d loops, seed=%d%s\n",
 440                                        num_procs, num_loops, seed,
 441 #if TRANSACTION_PROB
 442                                        always_transaction ? " (all within transactions)" : ""
 443 #else
 444                                        ""
 445 #endif
 446                                         );
 447                         }
 448                         exit(run_child(test_ntdb, i, seed, num_loops, 0,
 449                                        ntdb_flags));
 450                 }
 451         }
 452
 453         while (num_procs) {
 454                 int status, j;
 455                 pid_t pid;
 456
 457                 if (error_count != 0) {
 458                         /* try and stop the test on any failure */
 459                         for (j=0;j<num_procs;j++) {
 460                                 if (pids[j] != 0) {
 461                                         kill(pids[j], SIGTERM);
 462                                 }
 463                         }
 464                 }
 465
 466                 pid = waitpid(-1, &status, kill_random ? WNOHANG : 0);
 467                 if (pid == 0) {
 468                         struct timespec ts;
 469
 470                         /* Sleep for 1/10 second. */
 471                         ts.tv_sec = 0;
 472                         ts.tv_nsec = 100000000;
 473                         nanosleep(&ts, NULL);
 474
 475                         /* Kill someone. */
 476                         kill(pids[random() % num_procs], SIGUSR1);
 477                         continue;
 478                 }
 479
 480                 if (pid == -1) {
 481                         perror("failed to wait for child\n");
 482                         exit(1);
 483                 }
 484
 485                 for (j=0;j<num_procs;j++) {
 486                         if (pids[j] == pid) break;
 487                 }
 488                 if (j == num_procs) {
 489                         printf("unknown child %d exited!?\n", (int)pid);
 490                         exit(1);
 491                 }
 492                 if (WIFSIGNALED(status)) {
 493                         if (WTERMSIG(status) == SIGUSR2
 494                             || WTERMSIG(status) == SIGUSR1) {
 495                                 /* SIGUSR2 means they wrote to pipe. */
 496                                 if (WTERMSIG(status) == SIGUSR2) {
 497                                         if (read(pfds[0], &done[j],
 498                                                  sizeof(done[j]))
 499                                             != sizeof(done[j]))
 500                                                 err(1,
 501                                                     "Short read from child?");
 502                                 }
 503                                 pids[j] = fork();
 504                                 if (pids[j] == 0)
 505                                         exit(run_child(test_ntdb, j, seed,
 506                                                        num_loops, done[j],
 507                                                        ntdb_flags));
 508                                 printf("Restarting child %i for %u-%u\n",
 509                                        j, done[j], num_loops);
 510                                 continue;
 511                         }
 512                         printf("child %d exited with signal %d\n",
 513                                (int)pid, WTERMSIG(status));
 514                         error_count++;
 515                 } else {
 516                         if (WEXITSTATUS(status) != 0) {
 517                                 printf("child %d exited with status %d\n",
 518                                        (int)pid, WEXITSTATUS(status));
 519                                 error_count++;
 520                         }
 521                 }
 522                 memmove(&pids[j], &pids[j+1],
 523                         (num_procs - j - 1)*sizeof(pids[0]));
 524                 num_procs--;
 525         }
 526
 527         free(pids);
 528
 529 done:
 530         if (error_count == 0) {
 531                 db = ntdb_open(test_ntdb, NTDB_DEFAULT, O_RDWR | O_CREAT,
 532                               0600, &log_attr);
 533                 if (!db) {
 534                         fprintf(stderr, "%u:%s:%s\n", (unsigned int)getpid(), test_ntdb,
 535                                 "db open failed");
 536                         exit(1);
 537                 }
 538                 e = ntdb_check(db, NULL, NULL);
 539                 if (e) {
 540                         warn_on_err(e, db, "db check failed");
 541                         exit(1);
 542                 }
 543                 ntdb_close(db);
 544                 printf("OK\n");
 545         }
 546
 547         free(test_ntdb);
 548         return error_count;
 549 }