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 struct tdb_logging_context log_ctx;
  37
  38 #ifdef PRINTF_ATTRIBUTE
  39 static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
  40 #endif
  41 static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...)
  42 {
  43         va_list ap;
  44
  45         /* trace level messages do not indicate an error */
  46         if (level != TDB_DEBUG_TRACE) {
  47                 error_count++;
  48         }
  49
  50         va_start(ap, format);
  51         vfprintf(stdout, format, ap);
  52         va_end(ap);
  53         fflush(stdout);
  54 #if 0
  55         if (level != TDB_DEBUG_TRACE) {
  56                 char *ptr;
  57                 signal(SIGUSR1, SIG_IGN);
  58                 asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
  59                 system(ptr);
  60                 free(ptr);
  61         }
  62 #endif
  63 }
  64
  65 static void fatal(const char *why)
  66 {
  67         perror(why);
  68         error_count++;
  69 }
  70
  71 static char *randbuf(int len)
  72 {
  73         char *buf;
  74         int i;
  75         buf = (char *)malloc(len+1);
  76
  77         for (i=0;i<len;i++) {
  78                 buf[i] = 'a' + (rand() % 26);
  79         }
  80         buf[i] = 0;
  81         return buf;
  82 }
  83
  84 static int cull_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
  85                          void *state)
  86 {
  87 #if CULL_PROB
  88         if (random() % CULL_PROB == 0) {
  89                 tdb_delete(tdb, key);
  90         }
  91 #endif
  92         return 0;
  93 }
  94
  95 static void addrec_db(void)
  96 {
  97         int klen, dlen;
  98         char *k, *d;
  99         TDB_DATA key, data;
 100
 101         klen = 1 + (rand() % KEYLEN);
 102         dlen = 1 + (rand() % DATALEN);
 103
 104         k = randbuf(klen);
 105         d = randbuf(dlen);
 106
 107         key.dptr = (unsigned char *)k;
 108         key.dsize = klen+1;
 109
 110         data.dptr = (unsigned char *)d;
 111         data.dsize = dlen+1;
 112
 113 #if REOPEN_PROB
 114         if (in_transaction == 0 && random() % REOPEN_PROB == 0) {
 115                 tdb_reopen_all(0);
 116                 goto next;
 117         }
 118 #endif
 119
 120 #if TRANSACTION_PROB
 121         if (in_transaction == 0 &&
 122             (always_transaction || random() % TRANSACTION_PROB == 0)) {
 123                 if (tdb_transaction_start(db) != 0) {
 124                         fatal("tdb_transaction_start failed");
 125                 }
 126                 in_transaction++;
 127                 goto next;
 128         }
 129         if (in_transaction && random() % TRANSACTION_PROB == 0) {
 130                 if (random() % TRANSACTION_PREPARE_PROB == 0) {
 131                         if (tdb_transaction_prepare_commit(db) != 0) {
 132                                 fatal("tdb_transaction_prepare_commit failed");
 133                         }
 134                 }
 135                 if (tdb_transaction_commit(db) != 0) {
 136                         fatal("tdb_transaction_commit failed");
 137                 }
 138                 in_transaction--;
 139                 goto next;
 140         }
 141         if (in_transaction && random() % TRANSACTION_PROB == 0) {
 142                 if (tdb_transaction_cancel(db) != 0) {
 143                         fatal("tdb_transaction_cancel failed");
 144                 }
 145                 in_transaction--;
 146                 goto next;
 147         }
 148 #endif
 149
 150 #if DELETE_PROB
 151         if (random() % DELETE_PROB == 0) {
 152                 tdb_delete(db, key);
 153                 goto next;
 154         }
 155 #endif
 156
 157 #if STORE_PROB
 158         if (random() % STORE_PROB == 0) {
 159                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 160                         fatal("tdb_store failed");
 161                 }
 162                 goto next;
 163         }
 164 #endif
 165
 166 #if APPEND_PROB
 167         if (random() % APPEND_PROB == 0) {
 168                 if (tdb_append(db, key, data) != 0) {
 169                         fatal("tdb_append failed");
 170                 }
 171                 goto next;
 172         }
 173 #endif
 174
 175 #if LOCKSTORE_PROB
 176         if (random() % LOCKSTORE_PROB == 0) {
 177                 tdb_chainlock(db, key);
 178                 data = tdb_fetch(db, key);
 179                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 180                         fatal("tdb_store failed");
 181                 }
 182                 if (data.dptr) free(data.dptr);
 183                 tdb_chainunlock(db, key);
 184                 goto next;
 185         }
 186 #endif
 187
 188 #if TRAVERSE_PROB
 189         if (random() % TRAVERSE_PROB == 0) {
 190                 tdb_traverse(db, cull_traverse, NULL);
 191                 goto next;
 192         }
 193 #endif
 194
 195 #if TRAVERSE_READ_PROB
 196         if (random() % TRAVERSE_READ_PROB == 0) {
 197                 tdb_traverse_read(db, NULL, NULL);
 198                 goto next;
 199         }
 200 #endif
 201
 202         data = tdb_fetch(db, key);
 203         if (data.dptr) free(data.dptr);
 204
 205 next:
 206         free(k);
 207         free(d);
 208 }
 209
 210 static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
 211                        void *state)
 212 {
 213         tdb_delete(tdb, key);
 214         return 0;
 215 }
 216
 217 static void usage(void)
 218 {
 219         printf("Usage: tdbtorture [-t] [-k] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-H HASH_SIZE]\n");
 220         exit(0);
 221 }
 222
 223 static void send_count_and_suicide(int sig)
 224 {
 225         /* This ensures our successor can continue where we left off. */
 226         write(count_pipe, &loopnum, sizeof(loopnum));
 227         /* This gives a unique signature. */
 228         kill(getpid(), SIGUSR2);
 229 }
 230
 231 static int run_child(int i, int seed, unsigned num_loops, unsigned start)
 232 {
 233         db = tdb_open_ex("torture.tdb", hash_size, TDB_DEFAULT,
 234                          O_RDWR | O_CREAT, 0600, &log_ctx, NULL);
 235         if (!db) {
 236                 fatal("db open failed");
 237         }
 238
 239         srand(seed + i);
 240         srandom(seed + i);
 241
 242         /* Set global, then we're ready to handle being killed. */
 243         loopnum = start;
 244         signal(SIGUSR1, send_count_and_suicide);
 245
 246         for (;loopnum<num_loops && error_count == 0;loopnum++) {
 247                 addrec_db();
 248         }
 249
 250         if (error_count == 0) {
 251                 tdb_traverse_read(db, NULL, NULL);
 252                 if (always_transaction) {
 253                         while (in_transaction) {
 254                                 tdb_transaction_cancel(db);
 255                                 in_transaction--;
 256                         }
 257                         if (tdb_transaction_start(db) != 0)
 258                                 fatal("tdb_transaction_start failed");
 259                 }
 260                 tdb_traverse(db, traverse_fn, NULL);
 261                 tdb_traverse(db, traverse_fn, NULL);
 262                 if (always_transaction) {
 263                         if (tdb_transaction_commit(db) != 0)
 264                                 fatal("tdb_transaction_commit failed");
 265                 }
 266         }
 267
 268         tdb_close(db);
 269
 270         return (error_count < 100 ? error_count : 100);
 271 }
 272
 273 int main(int argc, char * const *argv)
 274 {
 275         int i, seed = -1;
 276         int num_loops = 5000;
 277         int num_procs = 3;
 278         int c, pfds[2];
 279         extern char *optarg;
 280         pid_t *pids;
 281         int kill_random = 0;
 282         int *done;
 283
 284         log_ctx.log_fn = tdb_log;
 285
 286         while ((c = getopt(argc, argv, "n:l:s:H:thk")) != -1) {
 287                 switch (c) {
 288                 case 'n':
 289                         num_procs = strtol(optarg, NULL, 0);
 290                         break;
 291                 case 'l':
 292                         num_loops = strtol(optarg, NULL, 0);
 293                         break;
 294                 case 'H':
 295                         hash_size = strtol(optarg, NULL, 0);
 296                         break;
 297                 case 's':
 298                         seed = strtol(optarg, NULL, 0);
 299                         break;
 300                 case 't':
 301                         always_transaction = 1;
 302                         break;
 303                 case 'k':
 304                         kill_random = 1;
 305                         break;
 306                 default:
 307                         usage();
 308                 }
 309         }
 310
 311         unlink("torture.tdb");
 312
 313         if (seed == -1) {
 314                 seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
 315         }
 316
 317         if (num_procs == 1 && !kill_random) {
 318                 /* Don't fork for this case, makes debugging easier. */
 319                 error_count = run_child(0, seed, num_loops, 0);
 320                 goto done;
 321         }
 322
 323         pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
 324         done = (int *)calloc(sizeof(int), num_procs);
 325
 326         if (pipe(pfds) != 0) {
 327                 perror("Creating pipe");
 328                 exit(1);
 329         }
 330         count_pipe = pfds[1];
 331
 332         for (i=0;i<num_procs;i++) {
 333                 if ((pids[i]=fork()) == 0) {
 334                         close(pfds[0]);
 335                         if (i == 0) {
 336                                 printf("testing with %d processes, %d loops, %d hash_size, seed=%d%s\n",
 337                                        num_procs, num_loops, hash_size, seed, always_transaction ? " (all within transactions)" : "");
 338                         }
 339                         exit(run_child(i, seed, num_loops, 0));
 340                 }
 341         }
 342
 343         while (num_procs) {
 344                 int status, j;
 345                 pid_t pid;
 346
 347                 if (error_count != 0) {
 348                         /* try and stop the test on any failure */
 349                         for (j=0;j<num_procs;j++) {
 350                                 if (pids[j] != 0) {
 351                                         kill(pids[j], SIGTERM);
 352                                 }
 353                         }
 354                 }
 355
 356                 pid = waitpid(-1, &status, kill_random ? WNOHANG : 0);
 357                 if (pid == 0) {
 358                         struct timespec ts;
 359
 360                         /* Sleep for 1/10 second. */
 361                         ts.tv_sec = 0;
 362                         ts.tv_nsec = 100000000;
 363                         nanosleep(&ts, NULL);
 364
 365                         /* Kill someone. */
 366                         kill(pids[random() % num_procs], SIGUSR1);
 367                         continue;
 368                 }
 369
 370                 if (pid == -1) {
 371                         perror("failed to wait for child\n");
 372                         exit(1);
 373                 }
 374
 375                 for (j=0;j<num_procs;j++) {
 376                         if (pids[j] == pid) break;
 377                 }
 378                 if (j == num_procs) {
 379                         printf("unknown child %d exited!?\n", (int)pid);
 380                         exit(1);
 381                 }
 382                 if (WIFSIGNALED(status)) {
 383                         if (WTERMSIG(status) == SIGUSR2
 384                             || WTERMSIG(status) == SIGUSR1) {
 385                                 /* SIGUSR2 means they wrote to pipe. */
 386                                 if (WTERMSIG(status) == SIGUSR2) {
 387                                         read(pfds[0], &done[j],
 388                                              sizeof(done[j]));
 389                                 }
 390                                 pids[j] = fork();
 391                                 if (pids[j] == 0)
 392                                         exit(run_child(j, seed, num_loops,
 393                                                        done[j]));
 394                                 printf("Restarting child %i for %u-%u\n",
 395                                        j, done[j], num_loops);
 396                                 continue;
 397                         }
 398                         printf("child %d exited with signal %d\n",
 399                                (int)pid, WTERMSIG(status));
 400                         error_count++;
 401                 } else {
 402                         if (WEXITSTATUS(status) != 0) {
 403                                 printf("child %d exited with status %d\n",
 404                                        (int)pid, WEXITSTATUS(status));
 405                                 error_count++;
 406                         }
 407                 }
 408                 memmove(&pids[j], &pids[j+1],
 409                         (num_procs - j - 1)*sizeof(pids[0]));
 410                 num_procs--;
 411         }
 412
 413         free(pids);
 414
 415 done:
 416         if (error_count == 0) {
 417                 db = tdb_open_ex("torture.tdb", hash_size, TDB_DEFAULT,
 418                                  O_RDWR, 0, &log_ctx, NULL);
 419                 if (!db) {
 420                         fatal("db open failed");
 421                 }
 422                 if (tdb_check(db, NULL, NULL) == -1) {
 423                         printf("db check failed");
 424                         exit(1);
 425                 }
 426                 tdb_close(db);
 427                 printf("OK\n");
 428         }
 429
 430         return error_count;
 431 }