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