granicus.if.org Git - sysstat/blob - cifsiostat.c

   1 /*
   2  * cifsiostat: Report I/O statistics for CIFS filesystems.
   3  * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved
   4  * Written by Ivana Varekova <varekova@redhat.com>
   5  *
   6  ***************************************************************************
   7  * This program is free software; you can redistribute it and/or modify it *
   8  * under the terms of the GNU General Public License as published  by  the *
   9  * Free Software Foundation; either version 2 of the License, or (at  your *
  10  * option) any later version.                                              *
  11  *                                                                         *
  12  * This program is distributed in the hope that it  will  be  useful,  but *
  13  * WITHOUT ANY WARRANTY; without the implied warranty  of  MERCHANTABILITY *
  14  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
  15  * for more details.                                                       *
  16  *                                                                         *
  17  * You should have received a copy of the GNU General Public License along *
  18  * with this program; if not, write to the Free Software Foundation, Inc., *
  19  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA                   *
  20  ***************************************************************************
  21  */
  22
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <signal.h>
  28 #include <sys/utsname.h>
  29 #include <ctype.h>
  30
  31 #include "version.h"
  32 #include "cifsiostat.h"
  33 #include "common.h"
  34
  35 #ifdef USE_NLS
  36 #include <locale.h>
  37 #include <libintl.h>
  38 #define _(string) gettext(string)
  39 #else
  40 #define _(string) (string)
  41 #endif
  42
  43 #define SCCSID "@(#)sysstat-" VERSION ": " __FILE__ " compiled " __DATE__ " " __TIME__
  44 char *sccsid(void) { return (SCCSID); }
  45
  46 unsigned long long uptime[2]  = {0, 0};
  47 unsigned long long uptime0[2] = {0, 0};
  48 struct cifs_stats *st_cifs[2];
  49 struct io_hdr_stats *st_hdr_cifs;
  50
  51 int cifs_nr = 0;        /* Nb of CIFS mounted directories found */
  52 int cpu_nr = 0;         /* Nb of processors on the machine */
  53 int flags = 0;          /* Flag for common options and system state */
  54
  55 long interval = 0;
  56 char timestamp[64];
  57
  58
  59 /*
  60  ***************************************************************************
  61  * Print usage and exit.
  62  *
  63  * IN:
  64  * @progname    Name of sysstat command.
  65  ***************************************************************************
  66  */
  67 void usage(char *progname)
  68 {
  69         fprintf(stderr, _("Usage: %s [ options ] [ <interval> [ <count> ] ]\n"),
  70                 progname);
  71
  72 #ifdef DEBUG
  73         fprintf(stderr, _("Options are:\n"
  74                           "[ --debuginfo ] [ -h ] [ -k | -m ] [ -t ] [ -V ]\n"));
  75 #else
  76         fprintf(stderr, _("Options are:\n"
  77                           "[ -h ] [ -k | -m ] [ -t ] [ -V ]\n"));
  78 #endif
  79         exit(1);
  80 }
  81
  82 /*
  83  ***************************************************************************
  84  * SIGALRM signal handler.
  85  *
  86  * IN:
  87  * @sig Signal number. Set to 0 for the first time, then to SIGALRM.
  88  ***************************************************************************
  89  */
  90 void alarm_handler(int sig)
  91 {
  92         signal(SIGALRM, alarm_handler);
  93         alarm(interval);
  94 }
  95
  96 /*
  97  ***************************************************************************
  98  * Find number of CIFS-mounted points that are registered in
  99  * /proc/fs/cifs/Stats.
 100  *
 101  * RETURNS:
 102  * Number of CIFS-mounted points.
 103  ***************************************************************************
 104  */
 105 int get_cifs_nr(void)
 106 {
 107         FILE *fp;
 108         char line[128];
 109         int cifs = 0;
 110
 111         if ((fp = fopen(CIFSSTATS, "r")) == NULL)
 112                 /* File non-existent */
 113                 return 0;
 114
 115         while (fgets(line, 128, fp) != NULL) {
 116
 117                 if (!strncmp(line, "Share (unique mount targets): ", 30)) {
 118                         sscanf(line + 30, "%d", &cifs);
 119                         break;
 120                 }
 121         }
 122
 123         /* Close file */
 124         fclose(fp);
 125
 126         return cifs;
 127 }
 128
 129 /*
 130  ***************************************************************************
 131  * Set every cifs_io entry to inactive state (unregistered).
 132  ***************************************************************************
 133  */
 134 void set_entries_inactive(void)
 135 {
 136         int i;
 137         struct io_hdr_stats *shi = st_hdr_cifs;
 138
 139         for (i = 0; i < cifs_nr; i++, shi++) {
 140                 shi->active = FALSE;
 141         }
 142 }
 143
 144 /*
 145  ***************************************************************************
 146  * Free inactive entries (mark them as unused).
 147  ***************************************************************************
 148  */
 149 void free_inactive_entries(void)
 150 {
 151         int i;
 152         struct io_hdr_stats *shi = st_hdr_cifs;
 153
 154         for (i = 0; i < cifs_nr; i++, shi++) {
 155                 if (!shi->active) {
 156                         shi->used = FALSE;
 157                 }
 158         }
 159 }
 160
 161 /*
 162  ***************************************************************************
 163  * Allocate and init structures, according to system state.
 164  ***************************************************************************
 165  */
 166 void io_sys_init(void)
 167 {
 168         int i;
 169
 170         /* How many processors on this machine? */
 171         cpu_nr = get_cpu_nr(~0);
 172
 173         /* Get number of CIFS directories in /proc/fs/cifs/Stats */
 174         if ((cifs_nr = get_cifs_nr()) > 0) {
 175                 cifs_nr += NR_CIFS_PREALLOC;
 176         }
 177         if ((st_hdr_cifs = (struct io_hdr_stats *) calloc(cifs_nr, IO_HDR_STATS_SIZE)) == NULL) {
 178                 perror("malloc");
 179                 exit(4);
 180         }
 181
 182         /* Allocate structures for number of CIFS directories found */
 183         for (i = 0; i < 2; i++) {
 184                 if ((st_cifs[i] =
 185                     (struct cifs_stats *) calloc(cifs_nr, CIFS_STATS_SIZE)) == NULL) {
 186                         perror("malloc");
 187                         exit(4);
 188                 }
 189         }
 190 }
 191
 192 /*
 193  ***************************************************************************
 194  * Free various structures.
 195  ***************************************************************************
 196 */
 197 void io_sys_free(void)
 198 {
 199         int i;
 200
 201         /* Free CIFS directories structures */
 202         for (i = 0; i < 2; i++) {
 203
 204                 if (st_cifs[i]) {
 205                         free(st_cifs[i]);
 206                 }
 207         }
 208
 209         if (st_hdr_cifs) {
 210                 free(st_hdr_cifs);
 211         }
 212 }
 213
 214 /*
 215  ***************************************************************************
 216  * Save stats for current CIFS filesystem.
 217  *
 218  * IN:
 219  * @name                Name of CIFS filesystem.
 220  * @curr                Index in array for current sample statistics.
 221  * @st_io               Structure with CIFS statistics to save.
 222  ***************************************************************************
 223  */
 224 void save_stats(char *name, int curr, struct cifs_stats *st_io)
 225 {
 226         int i, j;
 227         struct io_hdr_stats *st_hdr_cifs_i;
 228         struct cifs_stats *st_cifs_i;
 229
 230         /* Look for CIFS directory in data table */
 231         for (i = 0; i < cifs_nr; i++) {
 232                 st_hdr_cifs_i = st_hdr_cifs + i;
 233                 if ((st_hdr_cifs_i->used == TRUE) &&
 234                     (!strcmp(st_hdr_cifs_i->name, name))) {
 235                         break;
 236                 }
 237         }
 238
 239         if (i == cifs_nr) {
 240                 /*
 241                  * This is a new filesystem: Look for an unused entry to store it.
 242                  */
 243                 for (i = 0; i < cifs_nr; i++) {
 244                         st_hdr_cifs_i = st_hdr_cifs + i;
 245                         if (!st_hdr_cifs_i->used) {
 246                                 /* Unused entry found... */
 247                                 st_hdr_cifs_i->used = TRUE; /* Indicate it is now used */
 248                                 st_hdr_cifs_i->active = TRUE;
 249                                 strcpy(st_hdr_cifs_i->name, name);
 250                                 st_cifs_i = st_cifs[curr] + i;
 251                                 *st_cifs_i = *((struct cifs_stats *) st_io);
 252                                 break;
 253                         }
 254                 }
 255                 if (i == cifs_nr) {
 256                         /*
 257                          * It is a new CIFS directory
 258                          * but there is no free structure to store it.
 259                          */
 260
 261                         /* All entries are used: The number has to be increased */
 262                         cifs_nr = cifs_nr + 5;
 263
 264                         /* Increase the size of st_hdr_ionfs buffer */
 265                         if ((st_hdr_cifs = (struct io_hdr_stats *)
 266                                 realloc(st_hdr_cifs, cifs_nr * IO_HDR_STATS_SIZE)) == NULL) {
 267                                 perror("malloc");
 268                                 exit(4);
 269                         }
 270
 271                         /* Set the new entries inactive */
 272                         for (j = 0; j < 5; j++) {
 273                                 st_hdr_cifs_i = st_hdr_cifs + i + j;
 274                                 st_hdr_cifs_i->used = FALSE;
 275                                 st_hdr_cifs_i->active = FALSE;
 276                         }
 277
 278                         /* Increase the size of st_hdr_ionfs buffer */
 279                         for (j = 0; j < 2; j++) {
 280                                 if ((st_cifs[j] = (struct cifs_stats *)
 281                                         realloc(st_cifs[j], cifs_nr * CIFS_STATS_SIZE)) == NULL) {
 282                                         perror("malloc");
 283                                         exit(4);
 284                                 }
 285                                 memset(st_cifs[j] + i, 0, 5 * CIFS_STATS_SIZE);
 286                         }
 287                         /* Now i shows the first unused entry of the new block */
 288                         st_hdr_cifs_i = st_hdr_cifs + i;
 289                         st_hdr_cifs_i->used = TRUE; /* Indicate it is now used */
 290                         st_hdr_cifs_i->active = TRUE;
 291                         strcpy(st_hdr_cifs_i->name, name);
 292                         st_cifs_i = st_cifs[curr] + i;
 293                         *st_cifs_i = *st_io;
 294                 }
 295         } else {
 296                 st_hdr_cifs_i = st_hdr_cifs + i;
 297                 st_hdr_cifs_i->active = TRUE;
 298                 st_hdr_cifs_i->used = TRUE;
 299                 st_cifs_i = st_cifs[curr] + i;
 300                 *st_cifs_i = *st_io;
 301         }
 302         /*
 303          * else it was a new CIFS directory
 304          * but there was no free structure to store it.
 305          */
 306 }
 307
 308 /*
 309  ***************************************************************************
 310  * Read CIFS-mount directories stats from /proc/fs/cifs/Stats.
 311  *
 312  * IN:
 313  * @curr        Index in array for current sample statistics.
 314  ***************************************************************************
 315  */
 316 void read_cifs_stat(int curr)
 317 {
 318         FILE *fp;
 319         char line[256];
 320         char aux[32];
 321         int start = 0;
 322         char cifs_name[MAX_NAME_LEN];
 323         char name_tmp[MAX_NAME_LEN];
 324         struct cifs_stats scifs;
 325
 326         /* Every CIFS entry is potentially unregistered */
 327         set_entries_inactive();
 328
 329         if ((fp = fopen(CIFSSTATS, "r")) == NULL)
 330                 return;
 331
 332         sprintf(aux, "%%*d) %%%ds",
 333                 MAX_NAME_LEN < 200 ? MAX_NAME_LEN - 1 : 200);
 334
 335         while (fgets(line, 256, fp) != NULL) {
 336
 337                 /* Read CIFS directory name */
 338                 if (isdigit((unsigned char) line[0]) && sscanf(line, aux , name_tmp) == 1) {
 339                         if (start) {
 340                                 save_stats(cifs_name, curr, &scifs);
 341                         }
 342                         else {
 343                                 start = 1;
 344                         }
 345                         strcpy(cifs_name, name_tmp);
 346                 }
 347                 else {
 348                         if (!strncmp(line, "Reads:", 6)) {
 349                                 sscanf(line, "Reads: %llu Bytes: %llu", &scifs.rd_ops, &scifs.rd_bytes);
 350                         }
 351                         if (!strncmp(line, "Writes:", 7)) {
 352                                 sscanf(line, "Writes: %llu Bytes: %llu", &scifs.wr_ops, &scifs.wr_bytes);
 353                         }
 354                         if (!strncmp(line, "Opens:", 6)) {
 355                                 sscanf(line, "Opens: %llu Closes:%llu Deletes: %llu",
 356                                        &scifs.fopens, &scifs.fcloses, &scifs.fdeletes);
 357                         }
 358                 }
 359         }
 360
 361         if (start) {
 362                 save_stats(cifs_name, curr, &scifs);
 363         }
 364
 365         fclose(fp);
 366
 367         /* Free structures corresponding to unregistered filesystems */
 368         free_inactive_entries();
 369 }
 370
 371 /*
 372  ***************************************************************************
 373  * Display CIFS stats header.
 374  *
 375  * OUT:
 376  * @fctr        Conversion factor.
 377  ***************************************************************************
 378  */
 379 void write_cifs_stat_header(int *fctr)
 380 {
 381         printf("Filesystem:           ");
 382         if (DISPLAY_KILOBYTES(flags)) {
 383                 printf("        rkB/s        wkB/s");
 384                 *fctr = 1024;
 385         }
 386         else if (DISPLAY_MEGABYTES(flags)) {
 387                 printf("        rMB/s        wMB/s");
 388                 *fctr = 1024 * 1024;
 389         }
 390         else {
 391                 printf("         rB/s         wB/s");
 392                 *fctr = 1;
 393         }
 394         printf("    rops/s    wops/s         fo/s         fc/s         fd/s\n");
 395 }
 396
 397 /*
 398  ***************************************************************************
 399  * Write CIFS stats read from /proc/fs/cifs/Stats.
 400  *
 401  * IN:
 402  * @curr        Index in array for current sample statistics.
 403  * @itv         Interval of time.
 404  * @fctr        Conversion factor.
 405  * @shi         Structures describing the CIFS filesystems.
 406  * @ioi         Current sample statistics.
 407  * @ioj         Previous sample statistics.
 408  ***************************************************************************
 409  */
 410 void write_cifs_stat(int curr, unsigned long long itv, int fctr,
 411                      struct io_hdr_stats *shi, struct cifs_stats *ioni,
 412                      struct cifs_stats *ionj)
 413 {
 414         if (DISPLAY_HUMAN_READ(flags)) {
 415                 printf("%-22s\n%23s", shi->name, "");
 416         }
 417         else {
 418                 printf("%-22s ", shi->name);
 419         }
 420
 421         /*       rB/s   wB/s   fo/s   fc/s   fd/s*/
 422         printf("%12.2f %12.2f %9.2f %9.2f %12.2f %12.2f %12.2f \n",
 423                S_VALUE(ionj->rd_bytes, ioni->rd_bytes, itv) / fctr,
 424                S_VALUE(ionj->wr_bytes, ioni->wr_bytes, itv) / fctr,
 425                S_VALUE(ionj->rd_ops, ioni->rd_ops, itv),
 426                S_VALUE(ionj->wr_ops, ioni->wr_ops, itv),
 427                S_VALUE(ionj->fopens, ioni->fopens, itv),
 428                S_VALUE(ionj->fcloses, ioni->fcloses, itv),
 429                S_VALUE(ionj->fdeletes, ioni->fdeletes, itv));
 430 }
 431
 432 /*
 433  ***************************************************************************
 434  * Print everything now (stats and uptime).
 435  *
 436  * IN:
 437  * @curr        Index in array for current sample statistics.
 438  * @rectime     Current date and time.
 439  ***************************************************************************
 440  */
 441 void write_stats(int curr, struct tm *rectime)
 442 {
 443         int i, fctr = 1;
 444         unsigned long long itv;
 445         struct io_hdr_stats *shi;
 446         struct cifs_stats *ioni, *ionj;
 447
 448         /* Test stdout */
 449         TEST_STDOUT(STDOUT_FILENO);
 450
 451         /* Print time stamp */
 452         if (DISPLAY_TIMESTAMP(flags)) {
 453                 if (DISPLAY_ISO(flags)) {
 454                         strftime(timestamp, sizeof(timestamp), "%FT%T%z", rectime);
 455                 }
 456                 else {
 457                         strftime(timestamp, sizeof(timestamp), "%x %X", rectime);
 458                 }
 459                 printf("%s\n", timestamp);
 460 #ifdef DEBUG
 461                 if (DISPLAY_DEBUG(flags)) {
 462                         fprintf(stderr, "%s\n", timestamp);
 463                 }
 464 #endif
 465         }
 466
 467         /* Interval is multiplied by the number of processors */
 468         itv = get_interval(uptime[!curr], uptime[curr]);
 469
 470         if (cpu_nr > 1) {
 471                 /* On SMP machines, reduce itv to one processor (see note above) */
 472                 itv = get_interval(uptime0[!curr], uptime0[curr]);
 473         }
 474
 475         shi = st_hdr_cifs;
 476
 477         /* Display CIFS stats header */
 478         write_cifs_stat_header(&fctr);
 479
 480         for (i = 0; i < cifs_nr; i++, shi++) {
 481                 if (shi->used) {
 482                         ioni = st_cifs[curr]  + i;
 483                         ionj = st_cifs[!curr] + i;
 484 #ifdef DEBUG
 485                         if (DISPLAY_DEBUG(flags)) {
 486                                 /* Debug output */
 487                                 fprintf(stderr, "name=%s itv=%llu fctr=%d ioni{ rd_bytes=%llu "
 488                                                 "wr_bytes=%llu rd_ops=%llu wr_ops=%llu fopens=%llu "
 489                                                 "fcloses=%llu fdeletes=%llu}\n",
 490                                         shi->name, itv, fctr,
 491                                         ioni->rd_bytes, ioni->wr_bytes,
 492                                         ioni->rd_ops,   ioni->wr_ops,
 493                                         ioni->fopens,   ioni->fcloses,
 494                                         ioni->fdeletes);
 495                         }
 496 #endif
 497                         write_cifs_stat(curr, itv, fctr, shi, ioni, ionj);
 498                 }
 499         }
 500         printf("\n");
 501 }
 502
 503 /*
 504  ***************************************************************************
 505  * Main loop: Read stats from the relevant sources and display them.
 506  *
 507  * IN:
 508  * @count       Number of lines of stats to print.
 509  * @rectime     Current date and time.
 510  ***************************************************************************
 511  */
 512 void rw_io_stat_loop(long int count, struct tm *rectime)
 513 {
 514         int curr = 1;
 515
 516         /* Don't buffer data if redirected to a pipe */
 517         setbuf(stdout, NULL);
 518
 519         do {
 520                 if (cpu_nr > 1) {
 521                         /*
 522                          * Read system uptime (only for SMP machines).
 523                          * Init uptime0. So if /proc/uptime cannot fill it,
 524                          * this will be done by /proc/stat.
 525                          */
 526                         uptime0[curr] = 0;
 527                         read_uptime(&(uptime0[curr]));
 528                 }
 529
 530                 /* Read CIFS stats */
 531                 read_cifs_stat(curr);
 532
 533                 /* Get time */
 534                 get_localtime(rectime);
 535
 536                 /* Print results */
 537                 write_stats(curr, rectime);
 538
 539                 if (count > 0) {
 540                         count--;
 541                 }
 542
 543                 if (count) {
 544                         curr ^= 1;
 545                         pause();
 546                 }
 547         }
 548         while (count);
 549 }
 550
 551 /*
 552  ***************************************************************************
 553  * Main entry to the cifsiostat program.
 554  ***************************************************************************
 555  */
 556 int main(int argc, char **argv)
 557 {
 558         int it = 0;
 559         int opt = 1;
 560         int i;
 561         long count = 1;
 562         struct utsname header;
 563         struct tm rectime;
 564
 565 #ifdef USE_NLS
 566         /* Init National Language Support */
 567         init_nls();
 568 #endif
 569
 570         /* Get HZ */
 571         get_HZ();
 572
 573         /* Process args... */
 574         while (opt < argc) {
 575
 576 #ifdef DEBUG
 577                 if (!strcmp(argv[opt], "--debuginfo")) {
 578                         flags |= I_D_DEBUG;
 579                         opt++;
 580                 } else
 581 #endif
 582                 if (!strncmp(argv[opt], "-", 1)) {
 583                         for (i = 1; *(argv[opt] + i); i++) {
 584
 585                                 switch (*(argv[opt] + i)) {
 586
 587                                 case 'h':
 588                                         /* Display an easy-to-read CIFS report */
 589                                         flags |= I_D_HUMAN_READ;
 590                                         break;
 591
 592                                 case 'k':
 593                                         if (DISPLAY_MEGABYTES(flags)) {
 594                                                 usage(argv[0]);
 595                                         }
 596                                         /* Display stats in kB/s */
 597                                         flags |= I_D_KILOBYTES;
 598                                         break;
 599
 600                                 case 'm':
 601                                         if (DISPLAY_KILOBYTES(flags)) {
 602                                                 usage(argv[0]);
 603                                         }
 604                                         /* Display stats in MB/s */
 605                                         flags |= I_D_MEGABYTES;
 606                                         break;
 607
 608                                 case 't':
 609                                         /* Display timestamp */
 610                                         flags |= I_D_TIMESTAMP;
 611                                         break;
 612
 613                                 case 'V':
 614                                         /* Print version number and exit */
 615                                         print_version();
 616                                         break;
 617
 618                                 default:
 619                                         usage(argv[0]);
 620                                 }
 621                         }
 622                         opt++;
 623                 }
 624
 625                 else if (!it) {
 626                         interval = atol(argv[opt++]);
 627                         if (interval < 0) {
 628                                 usage(argv[0]);
 629                         }
 630                         count = -1;
 631                         it = 1;
 632                 }
 633
 634                 else if (it > 0) {
 635                         count = atol(argv[opt++]);
 636                         if ((count < 1) || !interval) {
 637                                 usage(argv[0]);
 638                         }
 639                         it = -1;
 640                 }
 641                 else {
 642                         usage(argv[0]);
 643                 }
 644         }
 645
 646         if (!interval) {
 647                 count = 1;
 648         }
 649
 650         /* Init structures according to machine architecture */
 651         io_sys_init();
 652
 653         get_localtime(&rectime);
 654
 655         /* Get system name, release number and hostname */
 656         uname(&header);
 657         if (print_gal_header(&rectime, header.sysname, header.release,
 658                              header.nodename, header.machine, cpu_nr)) {
 659                 flags |= I_D_ISO;
 660         }
 661         printf("\n");
 662
 663         /* Set a handler for SIGALRM */
 664         alarm_handler(0);
 665
 666         /* Main loop */
 667         rw_io_stat_loop(count, &rectime);
 668
 669         /* Free structures */
 670         io_sys_free();
 671
 672         return 0;
 673 }