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locktest.c

/* 
   Unix SMB/Netbios implementation.
   Version 2.0
   randomised byte range lock tester
   Copyright (C) Andrew Tridgell 1999
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#define NO_SYSLOG

#include "includes.h"

static fstring password;
static fstring username;
static int got_pass;
static int numops = 1000;
static BOOL showall;
static BOOL analyze;
static BOOL hide_unlock_fails;
static BOOL use_oplocks;

#define FILENAME "\\locktest.dat"
#define LOCKRANGE 1000
#define LOCKBASE 0

/*
#define LOCKBASE (0x40000000 - 50)
*/

#define READ_PCT 50
#define LOCK_PCT 35
#define UNLOCK_PCT 55
#define RANGE_MULTIPLE 1
#define NSERVERS 2
#define NCONNECTIONS 2
#define NFILES 2
#define LOCK_TIMEOUT 0

#define NASTY_POSIX_LOCK_HACK 0


struct record {
      char r1, r2;
      char conn, f;
      SMB_BIG_UINT start, len;
      char needed;
};

#define PRESETS 0

#if PRESETS
static struct record preset[] = {
{36,  5, 0, 0, 0,  8, 1},
{ 2,  6, 0, 1, 0,  1, 1},
{53, 92, 0, 0, 0,  0, 1},
{99, 11, 0, 0, 7,  1, 1},
};
#endif

static struct record *recorded;

static void print_brl(SMB_DEV_T dev, SMB_INO_T ino, int pid, 
                  enum brl_type lock_type,
                  br_off start, br_off size)
{
#if NASTY_POSIX_LOCK_HACK
      {
            pstring cmd;
            static SMB_INO_T lastino;

            if (lastino != ino) {
                  slprintf(cmd, sizeof(cmd), 
                         "egrep POSIX.*%u /proc/locks", (int)ino);
                  system(cmd);
            }
            lastino = ino;
      }
#endif

      printf("%6d   %05x:%05x    %s  %.0f:%.0f(%.0f)\n", 
             (int)pid, (int)dev, (int)ino, 
             lock_type==READ_LOCK?"R":"W",
             (double)start, (double)start+size-1,(double)size);

}


static void show_locks(void)
{
      brl_forall(print_brl);
      /* system("cat /proc/locks"); */
}


/***************************************************** 
return a connection to a server
*******************************************************/
struct cli_state *connect_one(char *share)
{
      struct cli_state *c;
      struct nmb_name called, calling;
      char *server_n;
      fstring server;
      struct in_addr ip;
      fstring myname;
      static int count;

      fstrcpy(server,share+2);
      share = strchr(server,'\\');
      if (!share) return NULL;
      *share = 0;
      share++;

      server_n = server;
      
      zero_ip(&ip);

      slprintf(myname,sizeof(myname), "lock-%u-%u", getpid(), count++);

      make_nmb_name(&calling, myname, 0x0);
      make_nmb_name(&called , server, 0x20);

 again:
      zero_ip(&ip);

      /* have to open a new connection */
      if (!(c=cli_initialise(NULL)) || (cli_set_port(c, 139) == 0) ||
          !cli_connect(c, server_n, &ip)) {
            DEBUG(0,("Connection to %s failed\n", server_n));
            return NULL;
      }

      if (!cli_session_request(c, &calling, &called)) {
            DEBUG(0,("session request to %s failed\n", called.name));
            cli_shutdown(c);
            if (strcmp(called.name, "*SMBSERVER")) {
                  make_nmb_name(&called , "*SMBSERVER", 0x20);
                  goto again;
            }
            return NULL;
      }

      DEBUG(4,(" session request ok\n"));

      if (!cli_negprot(c)) {
            DEBUG(0,("protocol negotiation failed\n"));
            cli_shutdown(c);
            return NULL;
      }

      if (!got_pass) {
            char *pass;

            pass = (char *)getpass("Password: ");
            if (pass) {
                  pstrcpy(password, pass);
            }
      }

      if (!cli_session_setup(c, username, 
                         password, strlen(password),
                         password, strlen(password),
                         lp_workgroup())) {
            DEBUG(0,("session setup failed: %s\n", cli_errstr(c)));
            return NULL;
      }

      /*
       * These next two lines are needed to emulate
       * old client behaviour for people who have
       * scripts based on client output.
       * QUESTION ? Do we want to have a 'client compatibility
       * mode to turn these on/off ? JRA.
       */

      if (*c->server_domain || *c->server_os || *c->server_type)
            DEBUG(1,("Domain=[%s] OS=[%s] Server=[%s]\n",
                  c->server_domain,c->server_os,c->server_type));
      
      DEBUG(4,(" session setup ok\n"));

      if (!cli_send_tconX(c, share, "?????",
                      password, strlen(password)+1)) {
            DEBUG(0,("tree connect failed: %s\n", cli_errstr(c)));
            cli_shutdown(c);
            return NULL;
      }

      DEBUG(4,(" tconx ok\n"));

      c->use_oplocks = use_oplocks;

      return c;
}


static void reconnect(struct cli_state *cli[NSERVERS][NCONNECTIONS], int fnum[NSERVERS][NCONNECTIONS][NFILES],
                  char *share[NSERVERS])
{
      int server, conn, f;

      for (server=0;server<NSERVERS;server++)
      for (conn=0;conn<NCONNECTIONS;conn++) {
            if (cli[server][conn]) {
                  for (f=0;f<NFILES;f++) {
                        cli_close(cli[server][conn], fnum[server][conn][f]);
                  }
                  cli_ulogoff(cli[server][conn]);
                  cli_shutdown(cli[server][conn]);
                  SAFE_FREE(cli[server][conn]);
                  cli[server][conn] = NULL;
            }
            cli[server][conn] = connect_one(share[server]);
            if (!cli[server][conn]) {
                  DEBUG(0,("Failed to connect to %s\n", share[server]));
                  exit(1);
            }
      }
}



static BOOL test_one(struct cli_state *cli[NSERVERS][NCONNECTIONS], 
                 int fnum[NSERVERS][NCONNECTIONS][NFILES],
                 struct record *rec)
{
      unsigned conn = rec->conn;
      unsigned f = rec->f;
      SMB_BIG_UINT start = rec->start;
      SMB_BIG_UINT len = rec->len;
      unsigned r1 = rec->r1;
      unsigned r2 = rec->r2;
      unsigned op;
      int server;
      BOOL ret[NSERVERS];

      if (r1 < READ_PCT) {
            op = READ_LOCK; 
      } else {
            op = WRITE_LOCK; 
      }

      if (r2 < LOCK_PCT) {
            /* set a lock */
            for (server=0;server<NSERVERS;server++) {
                  ret[server] = cli_lock64(cli[server][conn], 
                                     fnum[server][conn][f],
                                     start, len, LOCK_TIMEOUT, op);
            }
            if (showall || ret[0] != ret[1]) {
                  printf("lock   conn=%u f=%u range=%.0f:%.0f(%.0f) op=%s -> %u:%u\n",
                         conn, f, 
                         (double)start, (double)start+len-1, (double)len,
                         op==READ_LOCK?"READ_LOCK":"WRITE_LOCK",
                         ret[0], ret[1]);
            }
            if (showall || ret[0] != ret[1]) show_locks();
            if (ret[0] != ret[1]) return False;
      } else if (r2 < LOCK_PCT+UNLOCK_PCT) {
            /* unset a lock */
            for (server=0;server<NSERVERS;server++) {
                  ret[server] = cli_unlock64(cli[server][conn], 
                                       fnum[server][conn][f],
                                       start, len);
            }
            if (showall || (!hide_unlock_fails && (ret[0] != ret[1]))) {
                  printf("unlock conn=%u f=%u range=%.0f:%.0f(%.0f)       -> %u:%u\n",
                         conn, f, 
                         (double)start, (double)start+len-1, (double)len,
                         ret[0], ret[1]);
            }
            if (showall || ret[0] != ret[1]) show_locks();
            if (!hide_unlock_fails && ret[0] != ret[1]) return False;
      } else {
            /* reopen the file */
            for (server=0;server<NSERVERS;server++) {
                  cli_close(cli[server][conn], fnum[server][conn][f]);
            }
            for (server=0;server<NSERVERS;server++) {
                  fnum[server][conn][f] = cli_open(cli[server][conn], FILENAME,
                                           O_RDWR|O_CREAT,
                                           DENY_NONE);
                  if (fnum[server][conn][f] == -1) {
                        printf("failed to reopen on share%d\n", server);
                        return False;
                  }
            }
            if (showall) {
                  printf("reopen conn=%u f=%u\n",
                         conn, f);
                  show_locks();
            }
      }
      return True;
}

static void close_files(struct cli_state *cli[NSERVERS][NCONNECTIONS], 
                  int fnum[NSERVERS][NCONNECTIONS][NFILES])
{
      int server, conn, f; 

      for (server=0;server<NSERVERS;server++)
      for (conn=0;conn<NCONNECTIONS;conn++)
      for (f=0;f<NFILES;f++) {
            if (fnum[server][conn][f] != -1) {
                  cli_close(cli[server][conn], fnum[server][conn][f]);
                  fnum[server][conn][f] = -1;
            }
      }
      for (server=0;server<NSERVERS;server++) {
            cli_unlink(cli[server][0], FILENAME);
      }
}

static void open_files(struct cli_state *cli[NSERVERS][NCONNECTIONS], 
                   int fnum[NSERVERS][NCONNECTIONS][NFILES])
{
      int server, conn, f; 

      for (server=0;server<NSERVERS;server++)
      for (conn=0;conn<NCONNECTIONS;conn++)
      for (f=0;f<NFILES;f++) {
            fnum[server][conn][f] = cli_open(cli[server][conn], FILENAME,
                                     O_RDWR|O_CREAT,
                                     DENY_NONE);
            if (fnum[server][conn][f] == -1) {
                  fprintf(stderr,"Failed to open fnum[%u][%u][%u]\n",
                        server, conn, f);
                  exit(1);
            }
      }
}


static int retest(struct cli_state *cli[NSERVERS][NCONNECTIONS], 
               int fnum[NSERVERS][NCONNECTIONS][NFILES],
               int n)
{
      int i;
      printf("testing %u ...\n", n);
      for (i=0; i<n; i++) {
            if (i && i % 100 == 0) {
                  printf("%u\n", i);
            }

            if (recorded[i].needed &&
                !test_one(cli, fnum, &recorded[i])) return i;
      }
      return n;
}


/* each server has two connections open to it. Each connection has two file
   descriptors open on the file - 8 file descriptors in total 

   we then do random locking ops in tamdem on the 4 fnums from each
   server and ensure that the results match
 */
static void test_locks(char *share[NSERVERS])
{
      struct cli_state *cli[NSERVERS][NCONNECTIONS];
      int fnum[NSERVERS][NCONNECTIONS][NFILES];
      int n, i, n1; 

      ZERO_STRUCT(fnum);
      ZERO_STRUCT(cli);

      recorded = (struct record *)malloc(sizeof(*recorded) * numops);

      for (n=0; n<numops; n++) {
#if PRESETS
            if (n < sizeof(preset) / sizeof(preset[0])) {
                  recorded[n] = preset[n];
            } else 
#endif
            {
                  recorded[n].conn = random() % NCONNECTIONS;
                  recorded[n].f = random() % NFILES;
                  recorded[n].start = LOCKBASE + ((unsigned)random() % (LOCKRANGE-1));
                  recorded[n].len = 1 + 
                        random() % (LOCKRANGE-(recorded[n].start-LOCKBASE));
                  recorded[n].start *= RANGE_MULTIPLE;
                  recorded[n].len *= RANGE_MULTIPLE;
                  recorded[n].r1 = random() % 100;
                  recorded[n].r2 = random() % 100;
                  recorded[n].needed = True;
            }
      }

      reconnect(cli, fnum, share);
      open_files(cli, fnum);
      n = retest(cli, fnum, numops);

      if (n == numops || !analyze) return;
      n++;

      while (1) {
            n1 = n;

            close_files(cli, fnum);
            reconnect(cli, fnum, share);
            open_files(cli, fnum);

            for (i=0;i<n-1;i++) {
                  int m;
                  recorded[i].needed = False;

                  close_files(cli, fnum);
                  open_files(cli, fnum);

                  m = retest(cli, fnum, n);
                  if (m == n) {
                        recorded[i].needed = True;
                  } else {
                        if (i < m) {
                              memmove(&recorded[i], &recorded[i+1],
                                    (m-i)*sizeof(recorded[0]));
                        }
                        n = m;
                        i--;
                  }
            }

            if (n1 == n) break;
      }

      close_files(cli, fnum);
      reconnect(cli, fnum, share);
      open_files(cli, fnum);
      showall = True;
      n1 = retest(cli, fnum, n);
      if (n1 != n-1) {
            printf("ERROR - inconsistent result (%u %u)\n", n1, n);
      }
      close_files(cli, fnum);

      for (i=0;i<n;i++) {
            printf("{%u, %u, %u, %u, %.0f, %.0f, %u},\n",
                   recorded[i].r1,
                   recorded[i].r2,
                   recorded[i].conn,
                   recorded[i].f,
                   (double)recorded[i].start,
                   (double)recorded[i].len,
                   recorded[i].needed);
      }     
}



static void usage(void)
{
      printf(
"Usage:\n\
  locktest //server1/share1 //server2/share2 [options..]\n\
  options:\n\
        -U user%%pass\n\
        -s seed\n\
        -o numops\n\
        -u          hide unlock fails\n\
        -a          (show all ops)\n\
        -O          use oplocks\n\
");
}

/****************************************************************************
  main program
****************************************************************************/
 int main(int argc,char *argv[])
{
      char *share[NSERVERS];
      extern char *optarg;
      extern int optind;
      extern FILE *dbf;
      int opt;
      char *p;
      int seed, server;
      static pstring servicesf = CONFIGFILE;

      setlinebuf(stdout);

      dbf = stderr;

      if (argc < 3 || argv[1][0] == '-') {
            usage();
            exit(1);
      }

      setup_logging(argv[0],True);

      for (server=0;server<NSERVERS;server++) {
            share[server] = argv[1+server];
            all_string_sub(share[server],"/","\\",0);
      }

      argc -= NSERVERS;
      argv += NSERVERS;

      TimeInit();
      charset_initialise();
      codepage_initialise(lp_client_code_page());

      lp_load(servicesf,True,False,False);
      load_interfaces();

      if (getenv("USER")) {
            pstrcpy(username,getenv("USER"));
      }

      seed = time(NULL);

      while ((opt = getopt(argc, argv, "U:s:ho:aAW:O")) != EOF) {
            switch (opt) {
            case 'U':
                  pstrcpy(username,optarg);
                  p = strchr(username,'%');
                  if (p) {
                        *p = 0;
                        pstrcpy(password, p+1);
                        got_pass = 1;
                  }
                  break;
            case 's':
                  seed = atoi(optarg);
                  break;
            case 'u':
                  hide_unlock_fails = True;
                  break;
            case 'o':
                  numops = atoi(optarg);
                  break;
            case 'O':
                  use_oplocks = True;
                  break;
            case 'a':
                  showall = True;
                  break;
            case 'A':
                  analyze = True;
                  break;
            case 'h':
                  usage();
                  exit(1);
            default:
                  printf("Unknown option %c (%d)\n", (char)opt, opt);
                  exit(1);
            }
      }

      argc -= optind;
      argv += optind;

      DEBUG(0,("seed=%u\n", seed));
      srandom(seed);

      locking_init(1);
      test_locks(share);

      return(0);
}

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