git.ozlabs.org Git - ccan/blob - ccan/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 <ccan/tdb/tdb.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_READ_PROB 20
  28 #define TRAVERSE_MOD_PROB 100
  29 #define TRAVERSE_ABORT_PROB 500
  30 #define CULL_PROB 100
  31 #define KEYLEN 3
  32 #define DATALEN 100
  33
  34 static struct tdb_context *db;
  35 static int in_transaction;
  36 static int in_traverse;
  37 static int error_count;
  38 static int always_transaction = 0;
  39
  40 #ifdef PRINTF_ATTRIBUTE
  41 static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
  42 #endif
  43 static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...)
  44 {
  45         va_list ap;
  46
  47         error_count++;
  48
  49         va_start(ap, format);
  50         vfprintf(stdout, format, ap);
  51         va_end(ap);
  52         fflush(stdout);
  53 #if 0
  54         {
  55                 char *ptr;
  56                 asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
  57                 system(ptr);
  58                 free(ptr);
  59         }
  60 #endif
  61 }
  62
  63 static void fatal(const char *why)
  64 {
  65         perror(why);
  66         error_count++;
  67 }
  68
  69 static char *randbuf(int len)
  70 {
  71         char *buf;
  72         int i;
  73         buf = (char *)malloc(len+1);
  74
  75         for (i=0;i<len;i++) {
  76                 buf[i] = 'a' + (rand() % 26);
  77         }
  78         buf[i] = 0;
  79         return buf;
  80 }
  81
  82 static void addrec_db(void);
  83 static int modify_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
  84                            void *state)
  85 {
  86 #if CULL_PROB
  87         if (random() % CULL_PROB == 0) {
  88                 tdb_delete(tdb, key);
  89         }
  90 #endif
  91
  92 #if TRAVERSE_MOD_PROB
  93         if (random() % TRAVERSE_MOD_PROB == 0) {
  94                 addrec_db();
  95         }
  96 #endif
  97
  98 #if TRAVERSE_ABORT_PROB
  99         if (random() % TRAVERSE_ABORT_PROB == 0)
 100                 return 1;
 101 #endif
 102
 103         return 0;
 104 }
 105
 106 static void addrec_db(void)
 107 {
 108         int klen, dlen;
 109         char *k, *d;
 110         TDB_DATA key, data;
 111
 112         klen = 1 + (rand() % KEYLEN);
 113         dlen = 1 + (rand() % DATALEN);
 114
 115         k = randbuf(klen);
 116         d = randbuf(dlen);
 117
 118         key.dptr = (unsigned char *)k;
 119         key.dsize = klen+1;
 120
 121         data.dptr = (unsigned char *)d;
 122         data.dsize = dlen+1;
 123
 124 #if REOPEN_PROB
 125         if (in_traverse == 0 && in_transaction == 0 && random() % REOPEN_PROB == 0) {
 126                 tdb_reopen_all(0);
 127                 goto next;
 128         }
 129 #endif
 130
 131 #if TRANSACTION_PROB
 132         if (in_traverse == 0 && in_transaction == 0 && (always_transaction || random() % TRANSACTION_PROB == 0)) {
 133                 if (tdb_transaction_start(db) != 0) {
 134                         fatal("tdb_transaction_start failed");
 135                 }
 136                 in_transaction++;
 137                 goto next;
 138         }
 139         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
 140                 if (random() % TRANSACTION_PREPARE_PROB == 0) {
 141                         if (tdb_transaction_prepare_commit(db) != 0) {
 142                                 fatal("tdb_transaction_prepare_commit failed");
 143                         }
 144                 }
 145                 if (tdb_transaction_commit(db) != 0) {
 146                         fatal("tdb_transaction_commit failed");
 147                 }
 148                 in_transaction--;
 149                 goto next;
 150         }
 151
 152         if (in_traverse == 0 && in_transaction && random() % TRANSACTION_PROB == 0) {
 153                 if (tdb_transaction_cancel(db) != 0) {
 154                         fatal("tdb_transaction_cancel failed");
 155                 }
 156                 in_transaction--;
 157                 goto next;
 158         }
 159 #endif
 160
 161 #if DELETE_PROB
 162         if (random() % DELETE_PROB == 0) {
 163                 tdb_delete(db, key);
 164                 goto next;
 165         }
 166 #endif
 167
 168 #if STORE_PROB
 169         if (random() % STORE_PROB == 0) {
 170                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 171                         fatal("tdb_store failed");
 172                 }
 173                 goto next;
 174         }
 175 #endif
 176
 177 #if APPEND_PROB
 178         if (random() % APPEND_PROB == 0) {
 179                 if (tdb_append(db, key, data) != 0) {
 180                         fatal("tdb_append failed");
 181                 }
 182                 goto next;
 183         }
 184 #endif
 185
 186 #if LOCKSTORE_PROB
 187         if (random() % LOCKSTORE_PROB == 0) {
 188                 tdb_chainlock(db, key);
 189                 data = tdb_fetch(db, key);
 190                 if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
 191                         fatal("tdb_store failed");
 192                 }
 193                 if (data.dptr) free(data.dptr);
 194                 tdb_chainunlock(db, key);
 195                 goto next;
 196         }
 197 #endif
 198
 199 #if TRAVERSE_PROB
 200         /* FIXME: recursive traverses break transactions? */
 201         if (in_traverse == 0 && random() % TRAVERSE_PROB == 0) {
 202                 in_traverse++;
 203                 tdb_traverse(db, modify_traverse, NULL);
 204                 in_traverse--;
 205                 goto next;
 206         }
 207 #endif
 208
 209 #if TRAVERSE_READ_PROB
 210         if (in_traverse == 0 && random() % TRAVERSE_READ_PROB == 0) {
 211                 in_traverse++;
 212                 tdb_traverse_read(db, NULL, NULL);
 213                 in_traverse--;
 214                 goto next;
 215         }
 216 #endif
 217
 218         data = tdb_fetch(db, key);
 219         if (data.dptr) free(data.dptr);
 220
 221 next:
 222         free(k);
 223         free(d);
 224 }
 225
 226 static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
 227                        void *state)
 228 {
 229         tdb_delete(tdb, key);
 230         return 0;
 231 }
 232
 233 static void usage(void)
 234 {
 235         printf("Usage: tdbtorture [-t] [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-H HASH_SIZE]\n");
 236         exit(0);
 237 }
 238
 239 int main(int argc, char * const *argv)
 240 {
 241         int i, seed = -1;
 242         int num_procs = 3;
 243         int num_loops = 5000;
 244         int hash_size = 2;
 245         int c;
 246         extern char *optarg;
 247         pid_t *pids;
 248
 249         struct tdb_logging_context log_ctx;
 250         log_ctx.log_fn = tdb_log;
 251
 252         while ((c = getopt(argc, argv, "n:l:s:H:th")) != -1) {
 253                 switch (c) {
 254                 case 'n':
 255                         num_procs = strtol(optarg, NULL, 0);
 256                         break;
 257                 case 'l':
 258                         num_loops = strtol(optarg, NULL, 0);
 259                         break;
 260                 case 'H':
 261                         hash_size = strtol(optarg, NULL, 0);
 262                         break;
 263                 case 's':
 264                         seed = strtol(optarg, NULL, 0);
 265                         break;
 266                 case 't':
 267                         always_transaction = 1;
 268                         break;
 269                 default:
 270                         usage();
 271                 }
 272         }
 273
 274         unlink("torture.tdb");
 275
 276         pids = (pid_t *)calloc(sizeof(pid_t), num_procs);
 277         pids[0] = getpid();
 278
 279         for (i=0;i<num_procs-1;i++) {
 280                 if ((pids[i+1]=fork()) == 0) break;
 281         }
 282
 283         db = tdb_open_ex("torture.tdb", hash_size, TDB_CLEAR_IF_FIRST,
 284                          O_RDWR | O_CREAT, 0600, &log_ctx, NULL);
 285         if (!db) {
 286                 fatal("db open failed");
 287         }
 288
 289         if (seed == -1) {
 290                 seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
 291         }
 292
 293         if (i == 0) {
 294                 printf("testing with %d processes, %d loops, %d hash_size, seed=%d%s\n",
 295                        num_procs, num_loops, hash_size, seed, always_transaction ? " (all within transactions)" : "");
 296         }
 297
 298         srand(seed + i);
 299         srandom(seed + i);
 300
 301         for (i=0;i<num_loops && error_count == 0;i++) {
 302                 addrec_db();
 303         }
 304
 305         if (error_count == 0) {
 306                 tdb_traverse_read(db, NULL, NULL);
 307                 if (always_transaction) {
 308                         while (in_transaction) {
 309                                 tdb_transaction_cancel(db);
 310                                 in_transaction--;
 311                         }
 312                         if (tdb_transaction_start(db) != 0)
 313                                 fatal("tdb_transaction_start failed");
 314                 }
 315                 tdb_traverse(db, traverse_fn, NULL);
 316                 tdb_traverse(db, traverse_fn, NULL);
 317                 if (always_transaction) {
 318                         if (tdb_transaction_commit(db) != 0)
 319                                 fatal("tdb_transaction_commit failed");
 320                 }
 321         }
 322
 323         tdb_close(db);
 324
 325         if (getpid() != pids[0]) {
 326                 return error_count;
 327         }
 328
 329         for (i=1;i<num_procs;i++) {
 330                 int status, j;
 331                 pid_t pid;
 332                 if (error_count != 0) {
 333                         /* try and stop the test on any failure */
 334                         for (j=1;j<num_procs;j++) {
 335                                 if (pids[j] != 0) {
 336                                         kill(pids[j], SIGTERM);
 337                                 }
 338                         }
 339                 }
 340                 pid = waitpid(-1, &status, 0);
 341                 if (pid == -1) {
 342                         perror("failed to wait for child\n");
 343                         exit(1);
 344                 }
 345                 for (j=1;j<num_procs;j++) {
 346                         if (pids[j] == pid) break;
 347                 }
 348                 if (j == num_procs) {
 349                         printf("unknown child %d exited!?\n", (int)pid);
 350                         exit(1);
 351                 }
 352                 if (WEXITSTATUS(status) != 0) {
 353                         printf("child %d exited with status %d\n",
 354                                (int)pid, WEXITSTATUS(status));
 355                         error_count++;
 356                 }
 357                 pids[j] = 0;
 358         }
 359
 360         free(pids);
 361
 362         if (error_count == 0) {
 363                 printf("OK\n");
 364         }
 365
 366         return error_count;
 367 }