git.ozlabs.org Git - ccan/blob - ccan/tdb2/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 <ccan/tdb2/tdb2.h>
   6 #include <stdlib.h>
   7 #include <err.h>
   8 #include <getopt.h>
   9 #include <stdarg.h>
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <errno.h>
  13 #include <unistd.h>
  14 #include <sys/types.h>
  15 #include <fcntl.h>
  16 #include <time.h>
  17 #include <sys/wait.h>
  18
  19 //#define REOPEN_PROB 30
  20 #define DELETE_PROB 8
  21 #define STORE_PROB 4
  22 #define APPEND_PROB 6
  23 #define TRANSACTION_PROB 10
  24 #define TRANSACTION_PREPARE_PROB 2
  25 #define LOCKSTORE_PROB 5
  26 #define TRAVERSE_PROB 20
  27 #define TRAVERSE_MOD_PROB 100
  28 #define TRAVERSE_ABORT_PROB 500
  29 #define CULL_PROB 100
  30 #define KEYLEN 3
  31 #define DATALEN 100
  32
  33 static struct tdb_context *db;
  34 static int in_transaction;
  35 static int in_traverse;
  36 static int error_count;
  37 #if TRANSACTION_PROB
  38 static int always_transaction = 0;
  39 #endif
  40 static int loopnum;
  41 static int count_pipe;
  42 static union tdb_attribute log_attr;
  43 static union tdb_attribute seed_attr;
  44
  45 static void tdb_log(struct tdb_context *tdb, enum tdb_log_level level,
  46                     void *private, const char *message)
  47 {
  48         fputs(message, stdout);
  49         fflush(stdout);
  50 #if 0
  51         {
  52                 char *ptr;
  53                 signal(SIGUSR1, SIG_IGN);
  54                 asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
  55                 system(ptr);
  56                 free(ptr);
  57         }
  58 #endif
  59 }
  60
  61 #include "../private.h"
  62
  63 static void segv_handler(int signal, siginfo_t *info, void *p)
  64 {
  65         char string[100];
  66
  67         sprintf(string, "%u: death at %p (map_ptr %p, map_size %zu)\n",
  68                 getpid(), info->si_addr, db->file->map_ptr,
  69                 (size_t)db->file->map_size);
  70         if (write(2, string, strlen(string)) > 0)
  71                 sleep(60);
  72         _exit(11);
  73 }
  74
  75 static void fatal(const char *why)
  76 {
  77         perror(why);
  78         error_count++;
  79 }
  80
  81 static char *randbuf(int len)
  82 {
  83         char *buf;
  84         int i;
  85         buf = (char *)malloc(len+1);
  86
  87         for (i=0;i<len;i++) {
  88                 buf[i] = 'a' + (rand() % 26);
  89         }
  90         buf[i] = 0;
  91         return buf;
  92 }
  93
  94 static void addrec_db(void);
  95 static int modify_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
  96                            void *state)
  97 {
  98 #if CULL_PROB
  99         if (random() % CULL_PROB == 0) {
 100                 tdb_delete(tdb, key);
 101         }
 102 #endif
 103
 104 #if TRAVERSE_MOD_PROB
 105         if (random() % TRAVERSE_MOD_PROB == 0) {
 106                 addrec_db();
 107         }
 108 #endif
 109
 110 #if TRAVERSE_ABORT_PROB
 111         if (random() % TRAVERSE_ABORT_PROB == 0)
 112                 return 1;
 113 #endif
 114
 115         return 0;
 116 }
 117
 118 static void addrec_db(void)
 119 {
 120         int klen, dlen;
 121         char *k, *d;
 122         TDB_DATA key, data;
 123
 124         klen = 1 + (rand() % KEYLEN);
 125         dlen = 1 + (rand() % DATALEN);
 126
 127         k = randbuf(klen);
 128         d = randbuf(dlen);
 129
 130         key.dptr = (unsigned char *)k;
 131         key.dsize = klen+1;
 132
 133         data.dptr = (unsigned char *)d;
 134         data.dsize = dlen+1;
 135
 136 #if REOPEN_PROB
 137         if (in_traverse == 0 && in_transaction == 0 && random() % REOPEN_PROB == 0) {
 138                 tdb_reopen_all(0);
 139                 goto next;
 140         }
 141 #endif
 142
 143 #if TRANSACTION_PROB
 144         if (in_traverse == 0 && in_transaction == 0 && (always_transaction || random() % TRANSACTION_PROB == 0)) {
 145                 if (tdb_transaction_start(db) != 0) {
 146                         fatal("tdb_transaction_start failed");
 147                 }
 148                 in_transaction++;
 149                 goto next;
 150         }
 151         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
 152                 if (random() % TRANSACTION_PREPARE_PROB == 0) {
 153                         if (tdb_transaction_prepare_commit(db) != 0) {
 154                                 fatal("tdb_transaction_prepare_commit failed");
 155                         }
 156                 }
 157                 if (tdb_transaction_commit(db) != 0) {
 158                         fatal("tdb_transaction_commit failed");
 159                 }
 160                 in_transaction--;
 161                 goto next;
 162         }
 163
 164         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
 165                 tdb_transaction_cancel(db);
 166                 in_transaction--;
 167                 goto next;
 168         }
 169 #endif
 170
 171 #if DELETE_PROB
 172         if (random() % DELETE_PROB == 0) {
 173                 tdb_delete(db, key);
 174                 goto next;
 175         }
 176 #endif
 177
 178 #if STORE_PROB
 179         if (random() % STORE_PROB == 0) {
 180                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 181                         fatal("tdb_store failed");
 182                 }
 183                 goto next;
 184         }
 185 #endif
 186
 187 #if APPEND_PROB
 188         if (random() % APPEND_PROB == 0) {
 189                 if (tdb_append(db, key, data) != 0) {
 190                         fatal("tdb_append failed");
 191                 }
 192                 goto next;
 193         }
 194 #endif
 195
 196 #if LOCKSTORE_PROB
 197         if (random() % LOCKSTORE_PROB == 0) {
 198                 tdb_chainlock(db, key);
 199                 tdb_fetch(db, key, &data);
 200                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 201                         fatal("tdb_store failed");
 202                 }
 203                 if (data.dptr) free(data.dptr);
 204                 tdb_chainunlock(db, key);
 205                 goto next;
 206         }
 207 #endif
 208
 209 #if TRAVERSE_PROB
 210         /* FIXME: recursive traverses break transactions? */
 211         if (in_traverse == 0 && random() % TRAVERSE_PROB == 0) {
 212                 in_traverse++;
 213                 tdb_traverse(db, modify_traverse, NULL);
 214                 in_traverse--;
 215                 goto next;
 216         }
 217 #endif
 218
 219         if (tdb_fetch(db, key, &data) == TDB_SUCCESS)
 220                 free(data.dptr);
 221
 222 next:
 223         free(k);
 224         free(d);
 225 }
 226
 227 static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
 228                        void *state)
 229 {
 230         tdb_delete(tdb, key);
 231         return 0;
 232 }
 233
 234 static void usage(void)
 235 {
 236         printf("Usage: tdbtorture"
 237 #if TRANSACTION_PROB
 238                " [-t]"
 239 #endif
 240                " [-k] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED]\n");
 241         exit(0);
 242 }
 243
 244 static void send_count_and_suicide(int sig)
 245 {
 246         /* This ensures our successor can continue where we left off. */
 247         if (write(count_pipe, &loopnum, sizeof(loopnum)) != sizeof(loopnum))
 248                 exit(2);
 249         /* This gives a unique signature. */
 250         kill(getpid(), SIGUSR2);
 251 }
 252
 253 static int run_child(int i, int seed, unsigned num_loops, unsigned start)
 254 {
 255         struct sigaction act = { .sa_sigaction = segv_handler,
 256                                  .sa_flags = SA_SIGINFO };
 257         sigaction(11, &act, NULL);
 258
 259         db = tdb_open("torture.tdb", TDB_DEFAULT, O_RDWR | O_CREAT, 0600,
 260                       &log_attr);
 261         if (!db) {
 262                 fatal("db open failed");
 263         }
 264
 265 #if 0
 266         if (i == 0) {
 267                 printf("pid %i\n", getpid());
 268                 sleep(9);
 269         } else
 270                 sleep(10);
 271 #endif
 272
 273         srand(seed + i);
 274         srandom(seed + i);
 275
 276         /* Set global, then we're ready to handle being killed. */
 277         loopnum = start;
 278         signal(SIGUSR1, send_count_and_suicide);
 279
 280         for (;loopnum<num_loops && error_count == 0;loopnum++) {
 281                 addrec_db();
 282         }
 283
 284         if (error_count == 0) {
 285                 tdb_traverse(db, NULL, NULL);
 286 #if TRANSACTION_PROB
 287                 if (always_transaction) {
 288                         while (in_transaction) {
 289                                 tdb_transaction_cancel(db);
 290                                 in_transaction--;
 291                         }
 292                         if (tdb_transaction_start(db) != 0)
 293                                 fatal("tdb_transaction_start failed");
 294                 }
 295 #endif
 296                 tdb_traverse(db, traverse_fn, NULL);
 297                 tdb_traverse(db, traverse_fn, NULL);
 298
 299 #if TRANSACTION_PROB
 300                 if (always_transaction) {
 301                         if (tdb_transaction_commit(db) != 0)
 302                                 fatal("tdb_transaction_commit failed");
 303                 }
 304 #endif
 305         }
 306
 307         tdb_close(db);
 308
 309         return (error_count < 100 ? error_count : 100);
 310 }
 311
 312 int main(int argc, char * const *argv)
 313 {
 314         int i, seed = -1;
 315         int num_loops = 5000;
 316         int num_procs = 3;
 317         int c, pfds[2];
 318         extern char *optarg;
 319         pid_t *pids;
 320         int kill_random = 0;
 321         int *done;
 322
 323         log_attr.base.attr = TDB_ATTRIBUTE_LOG;
 324         log_attr.base.next = &seed_attr;
 325         log_attr.log.log_fn = tdb_log;
 326         seed_attr.base.attr = TDB_ATTRIBUTE_SEED;
 327
 328         while ((c = getopt(argc, argv, "n:l:s:thk")) != -1) {
 329                 switch (c) {
 330                 case 'n':
 331                         num_procs = strtol(optarg, NULL, 0);
 332                         break;
 333                 case 'l':
 334                         num_loops = strtol(optarg, NULL, 0);
 335                         break;
 336                 case 's':
 337                         seed = strtol(optarg, NULL, 0);
 338                         break;
 339                 case 't':
 340 #if TRANSACTION_PROB
 341                         always_transaction = 1;
 342 #else
 343                         fprintf(stderr, "Transactions not supported\n");
 344                         usage();
 345 #endif
 346                         break;
 347                 case 'k':
 348                         kill_random = 1;
 349                         break;
 350                 default:
 351                         usage();
 352                 }
 353         }
 354
 355         unlink("torture.tdb");
 356
 357         if (seed == -1) {
 358                 seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
 359         }
 360         seed_attr.seed.seed = (((uint64_t)seed) << 32) | seed;
 361
 362         if (num_procs == 1 && !kill_random) {
 363                 /* Don't fork for this case, makes debugging easier. */
 364                 error_count = run_child(0, seed, num_loops, 0);
 365                 goto done;
 366         }
 367
 368         pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
 369         done = (int *)calloc(sizeof(int), num_procs);
 370
 371         if (pipe(pfds) != 0) {
 372                 perror("Creating pipe");
 373                 exit(1);
 374         }
 375         count_pipe = pfds[1];
 376
 377         for (i=0;i<num_procs;i++) {
 378                 if ((pids[i]=fork()) == 0) {
 379                         close(pfds[0]);
 380                         if (i == 0) {
 381                                 printf("testing with %d processes, %d loops, seed=%d%s\n",
 382                                        num_procs, num_loops, seed,
 383 #if TRANSACTION_PROB
 384                                        always_transaction ? " (all within transactions)" : ""
 385 #else
 386                                        ""
 387 #endif
 388                                         );
 389                         }
 390                         exit(run_child(i, seed, num_loops, 0));
 391                 }
 392         }
 393
 394         while (num_procs) {
 395                 int status, j;
 396                 pid_t pid;
 397
 398                 if (error_count != 0) {
 399                         /* try and stop the test on any failure */
 400                         for (j=0;j<num_procs;j++) {
 401                                 if (pids[j] != 0) {
 402                                         kill(pids[j], SIGTERM);
 403                                 }
 404                         }
 405                 }
 406
 407                 pid = waitpid(-1, &status, kill_random ? WNOHANG : 0);
 408                 if (pid == 0) {
 409                         struct timespec ts;
 410
 411                         /* Sleep for 1/10 second. */
 412                         ts.tv_sec = 0;
 413                         ts.tv_nsec = 100000000;
 414                         nanosleep(&ts, NULL);
 415
 416                         /* Kill someone. */
 417                         kill(pids[random() % num_procs], SIGUSR1);
 418                         continue;
 419                 }
 420
 421                 if (pid == -1) {
 422                         perror("failed to wait for child\n");
 423                         exit(1);
 424                 }
 425
 426                 for (j=0;j<num_procs;j++) {
 427                         if (pids[j] == pid) break;
 428                 }
 429                 if (j == num_procs) {
 430                         printf("unknown child %d exited!?\n", (int)pid);
 431                         exit(1);
 432                 }
 433                 if (WIFSIGNALED(status)) {
 434                         if (WTERMSIG(status) == SIGUSR2
 435                             || WTERMSIG(status) == SIGUSR1) {
 436                                 /* SIGUSR2 means they wrote to pipe. */
 437                                 if (WTERMSIG(status) == SIGUSR2) {
 438                                         if (read(pfds[0], &done[j],
 439                                                  sizeof(done[j]))
 440                                             != sizeof(done[j]))
 441                                                 err(1,
 442                                                     "Short read from child?");
 443                                 }
 444                                 pids[j] = fork();
 445                                 if (pids[j] == 0)
 446                                         exit(run_child(j, seed, num_loops,
 447                                                        done[j]));
 448                                 printf("Restarting child %i for %u-%u\n",
 449                                        j, done[j], num_loops);
 450                                 continue;
 451                         }
 452                         printf("child %d exited with signal %d\n",
 453                                (int)pid, WTERMSIG(status));
 454                         error_count++;
 455                 } else {
 456                         if (WEXITSTATUS(status) != 0) {
 457                                 printf("child %d exited with status %d\n",
 458                                        (int)pid, WEXITSTATUS(status));
 459                                 error_count++;
 460                         }
 461                 }
 462                 memmove(&pids[j], &pids[j+1],
 463                         (num_procs - j - 1)*sizeof(pids[0]));
 464                 num_procs--;
 465         }
 466
 467         free(pids);
 468
 469 done:
 470         if (error_count == 0) {
 471                 db = tdb_open("torture.tdb", TDB_DEFAULT, O_RDWR | O_CREAT,
 472                               0600, &log_attr);
 473                 if (!db) {
 474                         fatal("db open failed");
 475                 }
 476                 if (tdb_check(db, NULL, NULL) == -1) {
 477                         printf("db check failed");
 478                         exit(1);
 479                 }
 480                 tdb_close(db);
 481                 printf("OK\n");
 482         }
 483
 484         return error_count;
 485 }