lustre/tests/lp_utils.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   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 version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30 /*
  31  * This file is part of Lustre, http://www.lustre.org/
  32  * Lustre is a trademark of Sun Microsystems, Inc.
  33  *
  34  * lustre/tests/lp_utils.c
  35  *
  36  * Author: You Feng <youfeng@clusterfs.com>
  37  */
  38
  39 #include <mpi.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <time.h>
  43 #include <sys/time.h>
  44 #include <sys/types.h>
  45 #include <sys/stat.h>
  46 #include <unistd.h>
  47 #include <sys/ioctl.h>
  48 #include <fcntl.h>
  49 #include <errno.h>
  50 #include <liblustre.h>
  51 #include "lustre/lustre_user.h"
  52 #include "lustre/tests/lp_utils.h"
  53
  54 #define MAX_PROCESSES 8
  55
  56 int verbose = 0;
  57 int debug = 0;
  58
  59 char hostname[1024];
  60
  61 struct timeval t1, t2;
  62
  63 char *timestamp() {
  64         static char datestring[80];
  65         time_t timestamp;
  66
  67         fflush(stdout);
  68         timestamp = time(NULL);
  69         strftime(datestring, 80, "%T", localtime(&timestamp));
  70
  71         return datestring;
  72 }
  73
  74 inline void begin(char *str) {
  75         if (verbose > 0 && rank == 0) {
  76                 gettimeofday(&t1, NULL);
  77                 printf("%s:\tBeginning %s\n", timestamp(), str);
  78                 fflush(stdout);
  79         }
  80 }
  81
  82 inline void end(char *str) {
  83         float elapsed;
  84
  85         MPI_Barrier(MPI_COMM_WORLD);
  86         if (verbose > 0 && rank == 0) {
  87                 gettimeofday(&t2, NULL);
  88                 elapsed = (t2.tv_sec + ((float)t2.tv_usec/1000000))
  89                           - (t1.tv_sec + ((float)t1.tv_usec/1000000));
  90                 if (elapsed >= 60) {
  91                         printf("%s:\tFinished %-15s(%.2f min)\n",
  92                                timestamp(), str, elapsed / 60);
  93                 } else {
  94                         printf("%s:\tFinished %-15s(%.3f sec)\n",
  95                                timestamp(), str, elapsed);
  96
  97                 }
  98                 fflush(stdout);
  99         }
 100 }
 101
 102 void dump_diff(char *orig_buf, char *buf, int size, long _off)
 103 {
 104         int i, diff, off;
 105         char *p, *end;
 106
 107         printf("commpared buf size %d, at offset %lu\n\n", size, _off);
 108
 109         if (orig_buf) {
 110                 printf("original buf:\n");
 111                 p = orig_buf;
 112                 end = orig_buf + size;
 113                 i = 1;
 114                 while (p < end) {
 115                         printf(" %8lx", *(long *)p);
 116                         p += sizeof(long);
 117                         if (i++%8 == 0)
 118                                 printf("\n");
 119                 }
 120                 if (i%8) printf("\n\n");
 121                 else printf("\n");
 122         }
 123
 124         if (buf) {
 125                 printf("different data: diff_data(orig_data)\n");
 126                 diff = 0;
 127                 off = 0;
 128                 i = 1;
 129                 p = buf;
 130                 end = buf + size;
 131                 while (p < end) {
 132                         if (memcmp(p, orig_buf + off, sizeof(long)) != 0) {
 133                                 printf("\toff: %5d,\tdata: %8lx (%8lx)\n", off,
 134                                        *(unsigned long *)p,
 135                                        *(unsigned long *)(orig_buf + off));
 136                                 diff++;
 137                         }
 138                         off += sizeof(long);
 139                         p += sizeof(long);
 140                 }
 141                 printf("\n %d total differents found\n\n", diff);
 142         }
 143 }
 144
 145 void lp_gethostname(void)
 146 {
 147         if (gethostname(hostname, 1024) == -1) {
 148                 fprintf(stderr, "gethostname: (%d)%s", errno, strerror(errno));
 149                 MPI_Abort(MPI_COMM_WORLD, 2);
 150         }
 151 }
 152
 153 /* This function does not FAIL if the requested "name" does not exit.
 154  * This is just to clean up any files or directories left over from
 155  * previous runs
 156  */
 157 void remove_file_or_dir(char *name)
 158 {
 159         struct stat statbuf;
 160         char errmsg[MAX_FILENAME_LEN + 20];
 161
 162         if (stat(name, &statbuf) != -1) {
 163                 if (S_ISREG(statbuf.st_mode)) {
 164                         printf("stale file found\n");
 165                         if (unlink(name) == -1) {
 166                                 sprintf(errmsg, "unlink of %s", name);
 167                                 FAIL(errmsg);
 168                         }
 169                 }
 170                 if (S_ISDIR(statbuf.st_mode)) {
 171                         printf("stale directory found\n");
 172                         if (rmdir(name) == -1) {
 173                                 sprintf(errmsg, "rmdir of %s", name);
 174                                 FAIL(errmsg);
 175                         }
 176                 }
 177         }
 178 }
 179
 180 void create_file(char *name, long filesize, int fill)
 181 {
 182         static char filename[MAX_FILENAME_LEN];
 183         char errmsg[MAX_FILENAME_LEN + 20];
 184         char buf[1024 * 8];
 185         char c = 'A' + size;
 186         int fd, rc;
 187         short zero = 0;
 188         long left = filesize;
 189
 190         /* Process 0 creates the test file(s) */
 191         if (rank == 0) {
 192                 sprintf(filename, "%s/%s", testdir, name);
 193                 remove_file_or_dir(filename);
 194                 if ((fd = creat(filename, FILEMODE)) == -1) {
 195                         sprintf(errmsg, "create of file %s", filename);
 196                         FAIL(errmsg);
 197                 }
 198                 if (filesize > 0) {
 199                         if (lseek(fd, filesize - 1, SEEK_SET) == -1) {
 200                                 close(fd);
 201                                 sprintf(errmsg, "lseek of file %s", filename);
 202                                 FAIL(errmsg);
 203                         }
 204                         if (write(fd, &zero, 1) == -1) {
 205                                 close(fd);
 206                                 sprintf(errmsg, "write of file %s", filename);
 207                                 FAIL(errmsg);
 208                         }
 209                 }
 210                 if (filesize > 0 && fill) {
 211                         if (lseek(fd, 0, SEEK_SET) == -1) {
 212                                 close(fd);
 213                                 sprintf(errmsg, "lseek of file %s", filename);
 214                                 FAIL(errmsg);
 215                         }
 216                         memset(buf, c, 1024);
 217                         while (left > 0) {
 218                                 if ((rc = write(fd, buf,
 219                                                 left > (1024 * 8) ? (1024 * 8) : left))
 220                                     == -1) {
 221                                         close(fd);
 222                                         sprintf(errmsg, "write of file %s", filename);
 223                                         FAIL(errmsg);
 224                                 }
 225                                 left -= rc;
 226                         }
 227                 }
 228                 if (close(fd) == -1) {
 229                         sprintf(errmsg, "close of file %s", filename);
 230                         FAIL(errmsg);
 231                 }
 232         }
 233 }
 234
 235 void check_stat(char *filename, struct stat *state, struct stat *old_state)
 236 {
 237         char errmsg[MAX_FILENAME_LEN+20];
 238
 239         if (stat(filename, state) == -1) {
 240                 sprintf(errmsg, "stat of file %s", filename);
 241                 FAIL(errmsg);
 242         }
 243
 244         if (memcmp(state, old_state, sizeof(struct stat)) != 0) {
 245                 errno = 0;
 246                 sprintf(errmsg, LP_STAT_FMT, LP_STAT_ARGS);
 247                 FAIL(errmsg);
 248         }
 249 }
 250
 251 void remove_file(char *name)
 252 {
 253         char filename[MAX_FILENAME_LEN];
 254         char errmsg[MAX_FILENAME_LEN + 20];
 255
 256         /* Process 0 remove the file(s) */
 257         if (rank == 0) {
 258                 sprintf(filename, "%s/%s", testdir, name);
 259                 if (unlink(filename) == -1) {
 260                         sprintf(errmsg, "unlink of file %s", filename);
 261                         FAIL(errmsg);
 262                 }
 263         }
 264 }
 265
 266 void fill_stride(char *buf, int buf_size, long long rank, long long _off)
 267 {
 268         char *p = buf;
 269         long long off, data[2];
 270         int cp, left = buf_size;
 271
 272         data[0] = rank;
 273         off = _off;
 274         while (left > 0) {
 275                 data[1] = off;
 276                 cp = left > sizeof(data) ? sizeof(data) : left;
 277                 memcpy(p, data, cp);
 278                 off += cp;
 279                 p += cp;
 280                 left -= cp;
 281         }
 282 }