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