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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2014, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/tests/lp_utils.c
  33  *
  34  * Author: You Feng <youfeng@clusterfs.com>
  35  */
  36
  37 #include <mpi.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <time.h>
  41 #include <sys/time.h>
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44 #include <unistd.h>
  45 #include <sys/ioctl.h>
  46 #include <fcntl.h>
  47 #include <errno.h>
  48 #include "lustre/lustre_user.h"
  49 #include "lustre/tests/lp_utils.h"
  50
  51 #define MAX_PROCESSES 8
  52
  53 int verbose = 0;
  54 int debug = 0;
  55
  56 char hostname[1024];
  57
  58 struct timeval t1, t2;
  59
  60 char *timestamp() {
  61         static char datestring[80];
  62         time_t timestamp;
  63
  64         fflush(stdout);
  65         timestamp = time(NULL);
  66         strftime(datestring, 80, "%T", localtime(&timestamp));
  67
  68         return datestring;
  69 }
  70
  71 void begin(char *str) {
  72         if (verbose > 0 && rank == 0) {
  73                 gettimeofday(&t1, NULL);
  74                 printf("%s:\tBeginning %s\n", timestamp(), str);
  75                 fflush(stdout);
  76         }
  77 }
  78
  79 void end(char *str) {
  80         float elapsed;
  81
  82         MPI_Barrier(MPI_COMM_WORLD);
  83         if (verbose > 0 && rank == 0) {
  84                 gettimeofday(&t2, NULL);
  85                 elapsed = (t2.tv_sec + ((float)t2.tv_usec/1000000))
  86                           - (t1.tv_sec + ((float)t1.tv_usec/1000000));
  87                 if (elapsed >= 60) {
  88                         printf("%s:\tFinished %-15s(%.2f min)\n",
  89                                timestamp(), str, elapsed / 60);
  90                 } else {
  91                         printf("%s:\tFinished %-15s(%.3f sec)\n",
  92                                timestamp(), str, elapsed);
  93
  94                 }
  95                 fflush(stdout);
  96         }
  97 }
  98
  99 void dump_diff(char *orig_buf, char *buf, int size, long _off)
 100 {
 101         int i, diff, off;
 102         char *p, *end;
 103
 104         printf("commpared buf size %d, at offset %lu\n\n", size, _off);
 105
 106         if (orig_buf) {
 107                 printf("original buf:\n");
 108                 p = orig_buf;
 109                 end = orig_buf + size;
 110                 i = 1;
 111                 while (p < end) {
 112                         printf(" %8lx", *(long *)p);
 113                         p += sizeof(long);
 114                         if (i++%8 == 0)
 115                                 printf("\n");
 116                 }
 117                 if (i%8) printf("\n\n");
 118                 else printf("\n");
 119         }
 120
 121         if (buf) {
 122                 printf("different data: diff_data(orig_data)\n");
 123                 diff = 0;
 124                 off = 0;
 125                 i = 1;
 126                 p = buf;
 127                 end = buf + size;
 128                 while (p < end) {
 129                         if (memcmp(p, orig_buf + off, sizeof(long)) != 0) {
 130                                 printf("\toff: %5d,\tdata: %8lx (%8lx)\n", off,
 131                                        *(unsigned long *)p,
 132                                        *(unsigned long *)(orig_buf + off));
 133                                 diff++;
 134                         }
 135                         off += sizeof(long);
 136                         p += sizeof(long);
 137                 }
 138                 printf("\n %d total differents found\n\n", diff);
 139         }
 140 }
 141
 142 void lp_gethostname(void)
 143 {
 144         if (gethostname(hostname, 1024) == -1) {
 145                 fprintf(stderr, "gethostname: (%d)%s", errno, strerror(errno));
 146                 MPI_Abort(MPI_COMM_WORLD, 2);
 147         }
 148 }
 149
 150 /* This function does not FAIL if the requested "name" does not exit.
 151  * This is just to clean up any files or directories left over from
 152  * previous runs
 153  */
 154 void remove_file_or_dir(char *name)
 155 {
 156         struct stat statbuf;
 157         char errmsg[MAX_FILENAME_LEN + 20];
 158
 159         if (stat(name, &statbuf) != -1) {
 160                 if (S_ISREG(statbuf.st_mode)) {
 161                         printf("stale file found\n");
 162                         if (unlink(name) == -1) {
 163                                 sprintf(errmsg, "unlink of %s", name);
 164                                 FAIL(errmsg);
 165                         }
 166                 }
 167                 if (S_ISDIR(statbuf.st_mode)) {
 168                         printf("stale directory found\n");
 169                         if (rmdir(name) == -1) {
 170                                 sprintf(errmsg, "rmdir of %s", name);
 171                                 FAIL(errmsg);
 172                         }
 173                 }
 174         }
 175 }
 176
 177 void create_file(char *name, long filesize, int fill)
 178 {
 179         static char filename[MAX_FILENAME_LEN];
 180         char errmsg[MAX_FILENAME_LEN + 20];
 181         char buf[1024 * 8];
 182         char c = 'A' + size;
 183         int fd, rc;
 184         short zero = 0;
 185         long left = filesize;
 186
 187         /* Process 0 creates the test file(s) */
 188         if (rank == 0) {
 189                 sprintf(filename, "%s/%s", testdir, name);
 190                 remove_file_or_dir(filename);
 191                 if ((fd = creat(filename, FILEMODE)) == -1) {
 192                         sprintf(errmsg, "create of file %s", filename);
 193                         FAIL(errmsg);
 194                 }
 195                 if (filesize > 0) {
 196                         if (lseek(fd, filesize - 1, SEEK_SET) == -1) {
 197                                 close(fd);
 198                                 sprintf(errmsg, "lseek of file %s", filename);
 199                                 FAIL(errmsg);
 200                         }
 201                         if (write(fd, &zero, 1) == -1) {
 202                                 close(fd);
 203                                 sprintf(errmsg, "write of file %s", filename);
 204                                 FAIL(errmsg);
 205                         }
 206                 }
 207                 if (filesize > 0 && fill) {
 208                         if (lseek(fd, 0, SEEK_SET) == -1) {
 209                                 close(fd);
 210                                 sprintf(errmsg, "lseek of file %s", filename);
 211                                 FAIL(errmsg);
 212                         }
 213                         memset(buf, c, 1024);
 214                         while (left > 0) {
 215                                 if ((rc = write(fd, buf,
 216                                                 left > (1024 * 8) ? (1024 * 8) : left))
 217                                     == -1) {
 218                                         close(fd);
 219                                         sprintf(errmsg, "write of file %s", filename);
 220                                         FAIL(errmsg);
 221                                 }
 222                                 left -= rc;
 223                         }
 224                 }
 225                 if (close(fd) == -1) {
 226                         sprintf(errmsg, "close of file %s", filename);
 227                         FAIL(errmsg);
 228                 }
 229         }
 230 }
 231
 232 void check_stat(char *filename, struct stat *state, struct stat *old_state)
 233 {
 234         char errmsg[MAX_FILENAME_LEN+20];
 235
 236         if (stat(filename, state) == -1) {
 237                 sprintf(errmsg, "stat of file %s", filename);
 238                 FAIL(errmsg);
 239         }
 240
 241         if (memcmp(state, old_state, sizeof(struct stat)) != 0) {
 242                 errno = 0;
 243                 sprintf(errmsg, LP_STAT_FMT, LP_STAT_ARGS);
 244                 FAIL(errmsg);
 245         }
 246 }
 247
 248 void remove_file(char *name)
 249 {
 250         char filename[MAX_FILENAME_LEN];
 251         char errmsg[MAX_FILENAME_LEN + 20];
 252
 253         /* Process 0 remove the file(s) */
 254         if (rank == 0) {
 255                 sprintf(filename, "%s/%s", testdir, name);
 256                 if (unlink(filename) == -1) {
 257                         sprintf(errmsg, "unlink of file %s", filename);
 258                         FAIL(errmsg);
 259                 }
 260         }
 261 }
 262
 263 void fill_stride(char *buf, int buf_size, long long rank, long long _off)
 264 {
 265         char *p = buf;
 266         long long off, data[2];
 267         int cp, left = buf_size;
 268
 269         data[0] = rank;
 270         off = _off;
 271         while (left > 0) {
 272                 data[1] = off;
 273                 cp = left > sizeof(data) ? sizeof(data) : left;
 274                 memcpy(p, data, cp);
 275                 off += cp;
 276                 p += cp;
 277                 left -= cp;
 278         }
 279 }