source4/torture/locktest.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    randomised byte range lock tester
   4    Copyright (C) Andrew Tridgell 1999
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "system/filesys.h"
  22 #include "system/time.h"
  23 #include "pstring.h"
  24 #include "auth/credentials/credentials.h"
  25 #include "auth/gensec/gensec.h"
  26 #include "libcli/libcli.h"
  27 #include "param/param.h"
  28 #include "dynconfig.h"
  29 #include "libcli/resolve/resolve.h"
  30
  31 static int numops = 1000;
  32 static bool showall;
  33 static bool analyze;
  34 static bool hide_unlock_fails;
  35 static bool use_oplocks;
  36 static uint_t lock_range = 100;
  37 static uint_t lock_base = 0;
  38 static uint_t min_length = 0;
  39 static bool exact_error_codes;
  40 static bool zero_zero;
  41
  42 #define FILENAME "\\locktest.dat"
  43
  44 #define READ_PCT 50
  45 #define LOCK_PCT 45
  46 #define UNLOCK_PCT 70
  47 #define RANGE_MULTIPLE 1
  48 #define NSERVERS 2
  49 #define NCONNECTIONS 2
  50 #define NFILES 2
  51 #define LOCK_TIMEOUT 0
  52
  53 static struct cli_credentials *servers[NSERVERS];
  54
  55 enum lock_op {OP_LOCK, OP_UNLOCK, OP_REOPEN};
  56
  57 struct record {
  58         enum lock_op lock_op;
  59         enum brl_type lock_type;
  60         char conn, f;
  61         uint64_t start, len;
  62         char needed;
  63         uint16_t pid;
  64 };
  65
  66 #define PRESETS 0
  67
  68 #if PRESETS
  69 static struct record preset[] = {
  70 {OP_LOCK, WRITE_LOCK, 0, 0, 2, 0, 1},
  71 {OP_LOCK, WRITE_LOCK, 0, 0, 0, 0, 1},
  72 {OP_LOCK, WRITE_LOCK, 0, 0, 3, 0, 1},
  73 {OP_UNLOCK, 0       , 0, 0, 2, 0, 1},
  74 {OP_REOPEN, 0, 0, 0, 0, 0, 1},
  75
  76 {OP_LOCK, READ_LOCK, 0, 0, 2, 0, 1},
  77 {OP_LOCK, READ_LOCK, 0, 0, 1, 1, 1},
  78 {OP_LOCK, WRITE_LOCK, 0, 0, 0, 0, 1},
  79 {OP_REOPEN, 0, 0, 0, 0, 0, 1},
  80
  81 {OP_LOCK, READ_LOCK, 0, 0, 2, 0, 1},
  82 {OP_LOCK, WRITE_LOCK, 0, 0, 3, 1, 1},
  83 {OP_LOCK, WRITE_LOCK, 0, 0, 0, 0, 1},
  84 {OP_REOPEN, 0, 0, 0, 0, 0, 1},
  85
  86 {OP_LOCK, READ_LOCK, 0, 0, 2, 0, 1},
  87 {OP_LOCK, WRITE_LOCK, 0, 0, 1, 1, 1},
  88 {OP_LOCK, WRITE_LOCK, 0, 0, 0, 0, 1},
  89 {OP_REOPEN, 0, 0, 0, 0, 0, 1},
  90
  91 {OP_LOCK, WRITE_LOCK, 0, 0, 2, 0, 1},
  92 {OP_LOCK, READ_LOCK, 0, 0, 1, 1, 1},
  93 {OP_LOCK, WRITE_LOCK, 0, 0, 0, 0, 1},
  94 {OP_REOPEN, 0, 0, 0, 0, 0, 1},
  95
  96 {OP_LOCK, WRITE_LOCK, 0, 0, 2, 0, 1},
  97 {OP_LOCK, READ_LOCK, 0, 0, 3, 1, 1},
  98 {OP_LOCK, WRITE_LOCK, 0, 0, 0, 0, 1},
  99 {OP_REOPEN, 0, 0, 0, 0, 0, 1},
 100
 101 };
 102 #endif
 103
 104 static struct record *recorded;
 105
 106 /*****************************************************
 107 return a connection to a server
 108 *******************************************************/
 109 static struct smbcli_state *connect_one(struct loadparm_context *lp_ctx,
 110                                         char *share, int snum, int conn)
 111 {
 112         struct smbcli_state *c;
 113         fstring server, myname;
 114         NTSTATUS status;
 115         int retries = 10;
 116         struct smbcli_options options;
 117
 118         lp_smbcli_options(lp_ctx, &options);
 119
 120         printf("connect_one(%s, %d, %d)\n", share, snum, conn);
 121
 122         fstrcpy(server,share+2);
 123         share = strchr_m(server,'\\');
 124         if (!share) return NULL;
 125         *share = 0;
 126         share++;
 127
 128         if (snum == 0) {
 129                 char **unc_list = NULL;
 130                 int num_unc_names;
 131                 const char *p;
 132                 p = lp_parm_string(lp_ctx, NULL, "torture", "unclist");
 133                 if (p) {
 134                         char *h, *s;
 135                         unc_list = file_lines_load(p, &num_unc_names, NULL);
 136                         if (!unc_list || num_unc_names <= 0) {
 137                                 printf("Failed to load unc names list from '%s'\n", p);
 138                                 exit(1);
 139                         }
 140
 141                         if (!smbcli_parse_unc(unc_list[conn % num_unc_names],
 142                                               NULL, &h, &s)) {
 143                                 printf("Failed to parse UNC name %s\n",
 144                                        unc_list[conn % num_unc_names]);
 145                                 exit(1);
 146                         }
 147                         fstrcpy(server, h);
 148                         fstrcpy(share, s);
 149                 }
 150         }
 151
 152
 153         slprintf(myname,sizeof(myname), "lock-%u-%u", getpid(), snum);
 154         cli_credentials_set_workstation(servers[snum], myname, CRED_SPECIFIED);
 155
 156         do {
 157                 printf("\\\\%s\\%s\n", server, share);
 158                 status = smbcli_full_connection(NULL, &c,
 159                                                 server,
 160                                                 lp_smb_ports(lp_ctx),
 161                                                 share, NULL,
 162                                                 servers[snum],
 163                                                 lp_resolve_context(lp_ctx),
 164                                                 NULL, &options);
 165                 if (!NT_STATUS_IS_OK(status)) {
 166                         sleep(2);
 167                 }
 168         } while (!NT_STATUS_IS_OK(status) && retries--);
 169
 170         if (!NT_STATUS_IS_OK(status)) {
 171                 return NULL;
 172         }
 173
 174         return c;
 175 }
 176
 177
 178 static void reconnect(struct loadparm_context *lp_ctx,
 179                       struct smbcli_state *cli[NSERVERS][NCONNECTIONS], int fnum[NSERVERS][NCONNECTIONS][NFILES],
 180                       char *share[NSERVERS])
 181 {
 182         int server, conn, f;
 183
 184         for (server=0;server<NSERVERS;server++)
 185         for (conn=0;conn<NCONNECTIONS;conn++) {
 186                 if (cli[server][conn]) {
 187                         for (f=0;f<NFILES;f++) {
 188                                 if (fnum[server][conn][f] != -1) {
 189                                         smbcli_close(cli[server][conn]->tree, fnum[server][conn][f]);
 190                                         fnum[server][conn][f] = -1;
 191                                 }
 192                         }
 193                         talloc_free(cli[server][conn]);
 194                 }
 195                 cli[server][conn] = connect_one(lp_ctx, share[server],
 196                                                 server, conn);
 197                 if (!cli[server][conn]) {
 198                         DEBUG(0,("Failed to connect to %s\n", share[server]));
 199                         exit(1);
 200                 }
 201         }
 202 }
 203
 204
 205
 206 static bool test_one(struct smbcli_state *cli[NSERVERS][NCONNECTIONS],
 207                      int fnum[NSERVERS][NCONNECTIONS][NFILES],
 208                      struct record *rec)
 209 {
 210         uint_t conn = rec->conn;
 211         uint_t f = rec->f;
 212         uint64_t start = rec->start;
 213         uint64_t len = rec->len;
 214         enum brl_type op = rec->lock_type;
 215         int server;
 216         bool ret[NSERVERS];
 217         NTSTATUS status[NSERVERS];
 218
 219         switch (rec->lock_op) {
 220         case OP_LOCK:
 221                 /* set a lock */
 222                 for (server=0;server<NSERVERS;server++) {
 223                         NTSTATUS res;
 224                         struct smbcli_tree *tree=cli[server][conn]->tree;
 225                         int fn=fnum[server][conn][f];
 226
 227                         if (!(tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES)) {
 228                                 res=smbcli_lock(tree, fn, start, len, LOCK_TIMEOUT, rec->lock_op);
 229                         } else {
 230                                 union smb_lock parms;
 231                                 int ltype;
 232                                 struct smb_lock_entry lock[1];
 233
 234                                 parms.lockx.level = RAW_LOCK_LOCKX;
 235                                 parms.lockx.in.file.fnum = fn;
 236
 237                                 ltype = (rec->lock_op == READ_LOCK? 1 : 0);
 238                                 ltype |= LOCKING_ANDX_LARGE_FILES;
 239                                 parms.lockx.in.mode = ltype;
 240                                 parms.lockx.in.timeout = LOCK_TIMEOUT;
 241                                 parms.lockx.in.ulock_cnt = 0;
 242                                 parms.lockx.in.lock_cnt = 1;
 243                                 lock[0].pid = rec->pid;
 244                                 lock[0].offset = start;
 245                                 lock[0].count = len;
 246                                 parms.lockx.in.locks = &lock[0];
 247
 248                                 res = smb_raw_lock(tree, &parms);
 249                         }
 250
 251                         ret[server] = NT_STATUS_IS_OK(res);
 252                         status[server] = smbcli_nt_error(cli[server][conn]->tree);
 253                         if (!exact_error_codes &&
 254                             NT_STATUS_EQUAL(status[server],
 255                                             NT_STATUS_FILE_LOCK_CONFLICT)) {
 256                                 status[server] = NT_STATUS_LOCK_NOT_GRANTED;
 257                         }
 258                 }
 259                 if (showall || !NT_STATUS_EQUAL(status[0],status[1])) {
 260                         printf("lock   conn=%u f=%u range=%.0f(%.0f) op=%s -> %s:%s\n",
 261                                conn, f,
 262                                (double)start, (double)len,
 263                                op==READ_LOCK?"READ_LOCK":"WRITE_LOCK",
 264                                nt_errstr(status[0]), nt_errstr(status[1]));
 265                 }
 266                 if (!NT_STATUS_EQUAL(status[0],status[1])) return false;
 267                 break;
 268
 269         case OP_UNLOCK:
 270                 /* unset a lock */
 271                 for (server=0;server<NSERVERS;server++) {
 272                         NTSTATUS res;
 273                         struct smbcli_tree *tree=cli[server][conn]->tree;
 274                         int fn=fnum[server][conn][f];
 275
 276
 277                         if (!(tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES)) {
 278                                 res=smbcli_unlock(tree, fn, start, len);
 279                         } else {
 280                                 union smb_lock parms;
 281                                 struct smb_lock_entry lock[1];
 282
 283                                 parms.lockx.level = RAW_LOCK_LOCKX;
 284                                 parms.lockx.in.file.fnum = fn;
 285                                 parms.lockx.in.mode = LOCKING_ANDX_LARGE_FILES;
 286                                 parms.lockx.in.timeout = 0;
 287                                 parms.lockx.in.ulock_cnt = 1;
 288                                 parms.lockx.in.lock_cnt = 0;
 289                                 lock[0].pid = rec->pid;
 290                                 lock[0].count = len;
 291                                 lock[0].offset = start;
 292                                 parms.lockx.in.locks = &lock[0];
 293
 294                                 res = smb_raw_lock(tree, &parms);
 295                         }
 296
 297                         ret[server] = NT_STATUS_IS_OK(res);
 298                         status[server] = smbcli_nt_error(cli[server][conn]->tree);
 299                 }
 300                 if (showall ||
 301                     (!hide_unlock_fails && !NT_STATUS_EQUAL(status[0],status[1]))) {
 302                         printf("unlock conn=%u f=%u range=%.0f(%.0f)       -> %s:%s\n",
 303                                conn, f,
 304                                (double)start, (double)len,
 305                                nt_errstr(status[0]), nt_errstr(status[1]));
 306                 }
 307                 if (!hide_unlock_fails && !NT_STATUS_EQUAL(status[0],status[1]))
 308                         return false;
 309                 break;
 310
 311         case OP_REOPEN:
 312                 /* reopen the file */
 313                 for (server=0;server<NSERVERS;server++) {
 314                         smbcli_close(cli[server][conn]->tree, fnum[server][conn][f]);
 315                         fnum[server][conn][f] = -1;
 316                 }
 317                 for (server=0;server<NSERVERS;server++) {
 318                         fnum[server][conn][f] = smbcli_open(cli[server][conn]->tree, FILENAME,
 319                                                          O_RDWR|O_CREAT,
 320                                                          DENY_NONE);
 321                         if (fnum[server][conn][f] == -1) {
 322                                 printf("failed to reopen on share%d\n", server);
 323                                 return false;
 324                         }
 325                 }
 326                 if (showall) {
 327                         printf("reopen conn=%u f=%u\n",
 328                                conn, f);
 329                 }
 330                 break;
 331         }
 332
 333         return true;
 334 }
 335
 336 static void close_files(struct smbcli_state *cli[NSERVERS][NCONNECTIONS],
 337                         int fnum[NSERVERS][NCONNECTIONS][NFILES])
 338 {
 339         int server, conn, f;
 340
 341         for (server=0;server<NSERVERS;server++)
 342         for (conn=0;conn<NCONNECTIONS;conn++)
 343         for (f=0;f<NFILES;f++) {
 344                 if (fnum[server][conn][f] != -1) {
 345                         smbcli_close(cli[server][conn]->tree, fnum[server][conn][f]);
 346                         fnum[server][conn][f] = -1;
 347                 }
 348         }
 349         for (server=0;server<NSERVERS;server++) {
 350                 smbcli_unlink(cli[server][0]->tree, FILENAME);
 351         }
 352 }
 353
 354 static void open_files(struct smbcli_state *cli[NSERVERS][NCONNECTIONS],
 355                        int fnum[NSERVERS][NCONNECTIONS][NFILES])
 356 {
 357         int server, conn, f;
 358
 359         for (server=0;server<NSERVERS;server++)
 360         for (conn=0;conn<NCONNECTIONS;conn++)
 361         for (f=0;f<NFILES;f++) {
 362                 fnum[server][conn][f] = smbcli_open(cli[server][conn]->tree, FILENAME,
 363                                                  O_RDWR|O_CREAT,
 364                                                  DENY_NONE);
 365                 if (fnum[server][conn][f] == -1) {
 366                         fprintf(stderr,"Failed to open fnum[%u][%u][%u]\n",
 367                                 server, conn, f);
 368                         exit(1);
 369                 }
 370         }
 371 }
 372
 373
 374 static int retest(struct smbcli_state *cli[NSERVERS][NCONNECTIONS],
 375                    int fnum[NSERVERS][NCONNECTIONS][NFILES],
 376                    int n)
 377 {
 378         int i;
 379         printf("testing %u ...\n", n);
 380         for (i=0; i<n; i++) {
 381                 if (i && i % 100 == 0) {
 382                         printf("%u\n", i);
 383                 }
 384
 385                 if (recorded[i].needed &&
 386                     !test_one(cli, fnum, &recorded[i])) return i;
 387         }
 388         return n;
 389 }
 390
 391
 392 /* each server has two connections open to it. Each connection has two file
 393    descriptors open on the file - 8 file descriptors in total
 394
 395    we then do random locking ops in tamdem on the 4 fnums from each
 396    server and ensure that the results match
 397  */
 398 static void test_locks(struct loadparm_context *lp_ctx, char *share[NSERVERS])
 399 {
 400         struct smbcli_state *cli[NSERVERS][NCONNECTIONS];
 401         int fnum[NSERVERS][NCONNECTIONS][NFILES];
 402         int n, i, n1, skip, r1, r2;
 403
 404         ZERO_STRUCT(fnum);
 405         ZERO_STRUCT(cli);
 406
 407         recorded = malloc_array_p(struct record, numops);
 408
 409         for (n=0; n<numops; n++) {
 410 #if PRESETS
 411                 if (n < sizeof(preset) / sizeof(preset[0])) {
 412                         recorded[n] = preset[n];
 413                 } else {
 414 #endif
 415                         recorded[n].conn = random() % NCONNECTIONS;
 416                         recorded[n].f = random() % NFILES;
 417                         recorded[n].start = lock_base + ((uint_t)random() % (lock_range-1));
 418                         recorded[n].len =  min_length +
 419                                 random() % (lock_range-(recorded[n].start-lock_base));
 420                         recorded[n].start *= RANGE_MULTIPLE;
 421                         recorded[n].len *= RANGE_MULTIPLE;
 422                         recorded[n].pid = random()%3;
 423                         if (recorded[n].pid == 2) {
 424                                 recorded[n].pid = 0xFFFF; /* see if its magic */
 425                         }
 426                         r1 = random() % 100;
 427                         r2 = random() % 100;
 428                         if (r1 < READ_PCT) {
 429                                 recorded[n].lock_type = READ_LOCK;
 430                         } else {
 431                                 recorded[n].lock_type = WRITE_LOCK;
 432                         }
 433                         if (r2 < LOCK_PCT) {
 434                                 recorded[n].lock_op = OP_LOCK;
 435                         } else if (r2 < UNLOCK_PCT) {
 436                                 recorded[n].lock_op = OP_UNLOCK;
 437                         } else {
 438                                 recorded[n].lock_op = OP_REOPEN;
 439                         }
 440                         recorded[n].needed = true;
 441                         if (!zero_zero && recorded[n].start==0 && recorded[n].len==0) {
 442                                 recorded[n].len = 1;
 443                         }
 444 #if PRESETS
 445                 }
 446 #endif
 447         }
 448
 449         reconnect(lp_ctx, cli, fnum, share);
 450         open_files(cli, fnum);
 451         n = retest(cli, fnum, numops);
 452
 453         if (n == numops || !analyze) return;
 454         n++;
 455
 456         skip = n/2;
 457
 458         while (1) {
 459                 n1 = n;
 460
 461                 close_files(cli, fnum);
 462                 reconnect(lp_ctx, cli, fnum, share);
 463                 open_files(cli, fnum);
 464
 465                 for (i=0;i<n-skip;i+=skip) {
 466                         int m, j;
 467                         printf("excluding %d-%d\n", i, i+skip-1);
 468                         for (j=i;j<i+skip;j++) {
 469                                 recorded[j].needed = false;
 470                         }
 471
 472                         close_files(cli, fnum);
 473                         open_files(cli, fnum);
 474
 475                         m = retest(cli, fnum, n);
 476                         if (m == n) {
 477                                 for (j=i;j<i+skip;j++) {
 478                                         recorded[j].needed = true;
 479                                 }
 480                         } else {
 481                                 if (i+(skip-1) < m) {
 482                                         memmove(&recorded[i], &recorded[i+skip],
 483                                                 (m-(i+skip-1))*sizeof(recorded[0]));
 484                                 }
 485                                 n = m-(skip-1);
 486                                 i--;
 487                         }
 488                 }
 489
 490                 if (skip > 1) {
 491                         skip = skip/2;
 492                         printf("skip=%d\n", skip);
 493                         continue;
 494                 }
 495
 496                 if (n1 == n) break;
 497         }
 498
 499         close_files(cli, fnum);
 500         reconnect(lp_ctx, cli, fnum, share);
 501         open_files(cli, fnum);
 502         showall = true;
 503         n1 = retest(cli, fnum, n);
 504         if (n1 != n-1) {
 505                 printf("ERROR - inconsistent result (%u %u)\n", n1, n);
 506         }
 507         close_files(cli, fnum);
 508
 509         for (i=0;i<n;i++) {
 510                 printf("{%d, %d, %u, %u, %.0f, %.0f, %u},\n",
 511                        recorded[i].lock_op,
 512                        recorded[i].lock_type,
 513                        recorded[i].conn,
 514                        recorded[i].f,
 515                        (double)recorded[i].start,
 516                        (double)recorded[i].len,
 517                        recorded[i].needed);
 518         }
 519 }
 520
 521
 522
 523 static void usage(void)
 524 {
 525         printf(
 526 "Usage:\n\
 527   locktest //server1/share1 //server2/share2 [options..]\n\
 528   options:\n\
 529         -U user%%pass        (may be specified twice)\n\
 530         -s seed\n\
 531         -o numops\n\
 532         -u          hide unlock fails\n\
 533         -a          (show all ops)\n\
 534         -A          analyse for minimal ops\n\
 535         -O          use oplocks\n\
 536         -E          enable exact error code checking\n\
 537         -Z          enable the zero/zero lock\n\
 538         -R range    set lock range\n\
 539         -B base     set lock base\n\
 540         -M min      set min lock length\n\
 541         -l filename unclist file\n\
 542 ");
 543 }
 544
 545 /****************************************************************************
 546   main program
 547 ****************************************************************************/
 548  int main(int argc,char *argv[])
 549 {
 550         char *share[NSERVERS];
 551         int opt;
 552         int seed, server;
 553         int username_count=0;
 554         struct loadparm_context *lp_ctx;
 555
 556         setlinebuf(stdout);
 557
 558         setup_logging("locktest", DEBUG_STDOUT);
 559
 560         if (argc < 3 || argv[1][0] == '-') {
 561                 usage();
 562                 exit(1);
 563         }
 564
 565         setup_logging(argv[0], DEBUG_STDOUT);
 566
 567         for (server=0;server<NSERVERS;server++) {
 568                 share[server] = argv[1+server];
 569                 all_string_sub(share[server],"/","\\",0);
 570         }
 571
 572         argc -= NSERVERS;
 573         argv += NSERVERS;
 574
 575         lp_ctx = loadparm_init(talloc_autofree_context());
 576         lp_load(lp_ctx, dyn_CONFIGFILE);
 577
 578         servers[0] = cli_credentials_init(talloc_autofree_context());
 579         servers[1] = cli_credentials_init(talloc_autofree_context());
 580         cli_credentials_guess(servers[0], lp_ctx);
 581         cli_credentials_guess(servers[1], lp_ctx);
 582
 583         seed = time(NULL);
 584
 585         while ((opt = getopt(argc, argv, "U:s:ho:aAW:OR:B:M:EZW:l:")) != EOF) {
 586                 switch (opt) {
 587                 case 'U':
 588                         if (username_count == 2) {
 589                                 usage();
 590                                 exit(1);
 591                         }
 592                         cli_credentials_parse_string(servers[username_count],
 593                                                      optarg, CRED_SPECIFIED);
 594                         username_count++;
 595                         break;
 596                 case 'R':
 597                         lock_range = strtol(optarg, NULL, 0);
 598                         break;
 599                 case 'B':
 600                         lock_base = strtol(optarg, NULL, 0);
 601                         break;
 602                 case 'M':
 603                         min_length = strtol(optarg, NULL, 0);
 604                         break;
 605                 case 's':
 606                         seed = atoi(optarg);
 607                         break;
 608                 case 'u':
 609                         hide_unlock_fails = true;
 610                         break;
 611                 case 'o':
 612                         numops = atoi(optarg);
 613                         break;
 614                 case 'O':
 615                         use_oplocks = true;
 616                         break;
 617                 case 'a':
 618                         showall = true;
 619                         break;
 620                 case 'A':
 621                         analyze = true;
 622                         break;
 623                 case 'Z':
 624                         zero_zero = true;
 625                         break;
 626                 case 'E':
 627                         exact_error_codes = true;
 628                         break;
 629                 case 'l':
 630                         lp_set_cmdline(lp_ctx, "torture:unclist", optarg);
 631                         break;
 632                 case 'W':
 633                         lp_set_cmdline(lp_ctx, "workgroup", optarg);
 634                         break;
 635                 case 'h':
 636                         usage();
 637                         exit(1);
 638                 default:
 639                         printf("Unknown option %c (%d)\n", (char)opt, opt);
 640                         exit(1);
 641                 }
 642         }
 643
 644         if (username_count == 0) {
 645                 usage();
 646                 return -1;
 647         }
 648         if (username_count == 1) {
 649                 servers[1] = servers[0];
 650         }
 651
 652         gensec_init(lp_ctx);
 653
 654         argc -= optind;
 655         argv += optind;
 656
 657         DEBUG(0,("seed=%u base=%d range=%d min_length=%d\n",
 658                  seed, lock_base, lock_range, min_length));
 659         srandom(seed);
 660
 661         test_locks(lp_ctx, share);
 662
 663         return(0);
 664 }
 665