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 "count.h"
  34 #include "common.h"
  35
  36 #ifdef USE_NLS
  37 #include <locale.h>
  38 #include <libintl.h>
  39 #define _(string) gettext(string)
  40 #else
  41 #define _(string) (string)
  42 #endif
  43
  44 #define SCCSID "@(#)sysstat-" VERSION ": " __FILE__ " compiled " __DATE__ " " __TIME__
  45 char *sccsid(void) { return (SCCSID); }
  46
  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 struct sigaction alrm_act;
  59
  60 /*
  61  ***************************************************************************
  62  * Print usage and exit.
  63  *
  64  * IN:
  65  * @progname    Name of sysstat command.
  66  ***************************************************************************
  67  */
  68 void usage(char *progname)
  69 {
  70         fprintf(stderr, _("Usage: %s [ options ] [ <interval> [ <count> ] ]\n"),
  71                 progname);
  72
  73 #ifdef DEBUG
  74         fprintf(stderr, _("Options are:\n"
  75                           "[ -h ] [ -k | -m ] [ -t ] [ -V ] [ --debuginfo ]\n"));
  76 #else
  77         fprintf(stderr, _("Options are:\n"
  78                           "[ -h ] [ -k | -m ] [ -t ] [ -V ]\n"));
  79 #endif
  80         exit(1);
  81 }
  82
  83 /*
  84  ***************************************************************************
  85  * SIGALRM signal handler.
  86  *
  87  * IN:
  88  * @sig Signal number.
  89  ***************************************************************************
  90  */
  91 void alarm_handler(int sig)
  92 {
  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, sizeof(line), 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, FALSE);
 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
 178         if (cifs_nr > 0) {
 179                 if ((st_hdr_cifs = (struct io_hdr_stats *) calloc(cifs_nr, IO_HDR_STATS_SIZE)) == NULL) {
 180                         perror("malloc");
 181                         exit(4);
 182                 }
 183
 184                 /* Allocate structures for number of CIFS directories found */
 185                 for (i = 0; i < 2; i++) {
 186                         if ((st_cifs[i] =
 187                         (struct cifs_stats *) calloc(cifs_nr, CIFS_STATS_SIZE)) == NULL) {
 188                                 perror("malloc");
 189                                 exit(4);
 190                         }
 191                 }
 192         }
 193         else {
 194                 /*
 195                  * cifs_nr value is probably zero, but it can also be negative
 196                  * (possible overflow when adding NR_CIFS_PREALLOC above).
 197                  */
 198                 cifs_nr = 0;
 199         }
 200 }
 201
 202 /*
 203  ***************************************************************************
 204  * Free various structures.
 205  ***************************************************************************
 206 */
 207 void io_sys_free(void)
 208 {
 209         int i;
 210
 211         /* Free CIFS directories structures */
 212         for (i = 0; i < 2; i++) {
 213                 free(st_cifs[i]);
 214         }
 215
 216         free(st_hdr_cifs);
 217 }
 218
 219 /*
 220  ***************************************************************************
 221  * Save stats for current CIFS filesystem.
 222  *
 223  * IN:
 224  * @name                Name of CIFS filesystem.
 225  * @curr                Index in array for current sample statistics.
 226  * @st_io               Structure with CIFS statistics to save.
 227  ***************************************************************************
 228  */
 229 void save_stats(char *name, int curr, struct cifs_stats *st_io)
 230 {
 231         int i, j;
 232         struct io_hdr_stats *st_hdr_cifs_i;
 233         struct cifs_stats *st_cifs_i;
 234
 235         /* Look for CIFS directory in data table */
 236         for (i = 0; i < cifs_nr; i++) {
 237                 st_hdr_cifs_i = st_hdr_cifs + i;
 238                 if ((st_hdr_cifs_i->used == TRUE) &&
 239                     (!strcmp(st_hdr_cifs_i->name, name))) {
 240                         break;
 241                 }
 242         }
 243
 244         if (i == cifs_nr) {
 245                 /*
 246                  * This is a new filesystem: Look for an unused entry to store it.
 247                  */
 248                 for (i = 0; i < cifs_nr; i++) {
 249                         st_hdr_cifs_i = st_hdr_cifs + i;
 250                         if (!st_hdr_cifs_i->used) {
 251                                 /* Unused entry found... */
 252                                 st_hdr_cifs_i->used = TRUE; /* Indicate it is now used */
 253                                 st_hdr_cifs_i->active = TRUE;
 254                                 strncpy(st_hdr_cifs_i->name, name, MAX_NAME_LEN - 1);
 255                                 st_hdr_cifs_i->name[MAX_NAME_LEN - 1] = '\0';
 256                                 st_cifs_i = st_cifs[curr] + i;
 257                                 *st_cifs_i = *((struct cifs_stats *) st_io);
 258                                 break;
 259                         }
 260                 }
 261                 if (i == cifs_nr) {
 262                         /*
 263                          * It is a new CIFS directory
 264                          * but there is no free structure to store it.
 265                          */
 266
 267                         /* All entries are used: The number has to be increased */
 268                         cifs_nr = cifs_nr + 5;
 269
 270                         /* Increase the size of st_hdr_ionfs buffer */
 271                         if ((st_hdr_cifs = (struct io_hdr_stats *)
 272                                 realloc(st_hdr_cifs, cifs_nr * IO_HDR_STATS_SIZE)) == NULL) {
 273                                 perror("malloc");
 274                                 exit(4);
 275                         }
 276
 277                         /* Set the new entries inactive */
 278                         for (j = 0; j < 5; j++) {
 279                                 st_hdr_cifs_i = st_hdr_cifs + i + j;
 280                                 st_hdr_cifs_i->used = FALSE;
 281                                 st_hdr_cifs_i->active = FALSE;
 282                         }
 283
 284                         /* Increase the size of st_hdr_ionfs buffer */
 285                         for (j = 0; j < 2; j++) {
 286                                 if ((st_cifs[j] = (struct cifs_stats *)
 287                                         realloc(st_cifs[j], cifs_nr * CIFS_STATS_SIZE)) == NULL) {
 288                                         perror("malloc");
 289                                         exit(4);
 290                                 }
 291                                 memset(st_cifs[j] + i, 0, 5 * CIFS_STATS_SIZE);
 292                         }
 293                         /* Now i shows the first unused entry of the new block */
 294                         st_hdr_cifs_i = st_hdr_cifs + i;
 295                         st_hdr_cifs_i->used = TRUE; /* Indicate it is now used */
 296                         st_hdr_cifs_i->active = TRUE;
 297                         strncpy(st_hdr_cifs_i->name, name, MAX_NAME_LEN - 1);
 298                         st_hdr_cifs_i->name[MAX_NAME_LEN - 1] = '\0';
 299                         st_cifs_i = st_cifs[curr] + i;
 300                         *st_cifs_i = *st_io;
 301                 }
 302         } else {
 303                 st_hdr_cifs_i = st_hdr_cifs + i;
 304                 st_hdr_cifs_i->active = TRUE;
 305                 st_hdr_cifs_i->used = TRUE;
 306                 st_cifs_i = st_cifs[curr] + i;
 307                 *st_cifs_i = *st_io;
 308         }
 309         /*
 310          * else it was a new CIFS directory
 311          * but there was no free structure to store it.
 312          */
 313 }
 314
 315 /*
 316  ***************************************************************************
 317  * Read CIFS-mount directories stats from /proc/fs/cifs/Stats.
 318  *
 319  * IN:
 320  * @curr        Index in array for current sample statistics.
 321  ***************************************************************************
 322  */
 323 void read_cifs_stat(int curr)
 324 {
 325         FILE *fp;
 326         char line[256];
 327         char aux[32];
 328         int start = 0;
 329         long long unsigned aux_open;
 330         long long unsigned all_open = 0;
 331         char cifs_name[MAX_NAME_LEN];
 332         char name_tmp[MAX_NAME_LEN];
 333         struct cifs_stats scifs = {0, 0, 0, 0, 0, 0, 0};
 334
 335         /* Every CIFS entry is potentially unregistered */
 336         set_entries_inactive();
 337
 338         if ((fp = fopen(CIFSSTATS, "r")) == NULL)
 339                 return;
 340
 341         sprintf(aux, "%%*d) %%%ds",
 342                 MAX_NAME_LEN < 200 ? MAX_NAME_LEN - 1 : 200);
 343
 344         while (fgets(line, sizeof(line), fp) != NULL) {
 345
 346                 /* Read CIFS directory name */
 347                 if (isdigit((unsigned char) line[0]) && sscanf(line, aux , name_tmp) == 1) {
 348                         if (start) {
 349                                 scifs.fopens = all_open;
 350                                 save_stats(cifs_name, curr, &scifs);
 351                                 all_open = 0;
 352                         }
 353                         else {
 354                                 start = 1;
 355                         }
 356                         strcpy(cifs_name, name_tmp);
 357                 }
 358                 else {
 359                         if (!strncmp(line, "Reads:", 6)) {
 360                                 sscanf(line, "Reads: %llu Bytes: %llu", &scifs.rd_ops, &scifs.rd_bytes);
 361                         }
 362                         if (!strncmp(line, "Writes:", 7)) {
 363                                 sscanf(line, "Writes: %llu Bytes: %llu", &scifs.wr_ops, &scifs.wr_bytes);
 364                         }
 365                         if (!strncmp(line, "Opens:", 6)) {
 366                                 sscanf(line, "Opens: %llu Closes:%llu Deletes: %llu",
 367                                        &aux_open, &scifs.fcloses, &scifs.fdeletes);
 368                                 all_open += aux_open;
 369                         }
 370                         if (!strncmp(line, "Posix Opens:", 12)) {
 371                                 sscanf(line, "Posix Opens: %llu", &aux_open);
 372                                 all_open += aux_open;
 373                         }
 374                 }
 375         }
 376
 377         if (start) {
 378                 scifs.fopens = all_open;
 379                 save_stats(cifs_name, curr, &scifs);
 380         }
 381
 382         fclose(fp);
 383
 384         /* Free structures corresponding to unregistered filesystems */
 385         free_inactive_entries();
 386 }
 387
 388 /*
 389  ***************************************************************************
 390  * Display CIFS stats header.
 391  *
 392  * OUT:
 393  * @fctr        Conversion factor.
 394  ***************************************************************************
 395  */
 396 void write_cifs_stat_header(int *fctr)
 397 {
 398         printf("Filesystem:           ");
 399         if (DISPLAY_KILOBYTES(flags)) {
 400                 printf("        rkB/s        wkB/s");
 401                 *fctr = 1024;
 402         }
 403         else if (DISPLAY_MEGABYTES(flags)) {
 404                 printf("        rMB/s        wMB/s");
 405                 *fctr = 1024 * 1024;
 406         }
 407         else {
 408                 printf("         rB/s         wB/s");
 409                 *fctr = 1;
 410         }
 411         printf("    rops/s    wops/s         fo/s         fc/s         fd/s\n");
 412 }
 413
 414 /*
 415  ***************************************************************************
 416  * Write CIFS stats read from /proc/fs/cifs/Stats.
 417  *
 418  * IN:
 419  * @curr        Index in array for current sample statistics.
 420  * @itv         Interval of time.
 421  * @fctr        Conversion factor.
 422  * @shi         Structures describing the CIFS filesystems.
 423  * @ioi         Current sample statistics.
 424  * @ioj         Previous sample statistics.
 425  ***************************************************************************
 426  */
 427 void write_cifs_stat(int curr, unsigned long long itv, int fctr,
 428                      struct io_hdr_stats *shi, struct cifs_stats *ioni,
 429                      struct cifs_stats *ionj)
 430 {
 431         if (DISPLAY_HUMAN_READ(flags)) {
 432                 printf("%-22s\n%23s", shi->name, "");
 433         }
 434         else {
 435                 printf("%-22s ", shi->name);
 436         }
 437
 438         /*       rB/s   wB/s   fo/s   fc/s   fd/s*/
 439         printf("%12.2f %12.2f %9.2f %9.2f %12.2f %12.2f %12.2f \n",
 440                S_VALUE(ionj->rd_bytes, ioni->rd_bytes, itv) / fctr,
 441                S_VALUE(ionj->wr_bytes, ioni->wr_bytes, itv) / fctr,
 442                S_VALUE(ionj->rd_ops, ioni->rd_ops, itv),
 443                S_VALUE(ionj->wr_ops, ioni->wr_ops, itv),
 444                S_VALUE(ionj->fopens, ioni->fopens, itv),
 445                S_VALUE(ionj->fcloses, ioni->fcloses, itv),
 446                S_VALUE(ionj->fdeletes, ioni->fdeletes, itv));
 447 }
 448
 449 /*
 450  ***************************************************************************
 451  * Print everything now (stats and uptime).
 452  *
 453  * IN:
 454  * @curr        Index in array for current sample statistics.
 455  * @rectime     Current date and time.
 456  ***************************************************************************
 457  */
 458 void write_stats(int curr, struct tm *rectime)
 459 {
 460         int i, fctr = 1;
 461         unsigned long long itv;
 462         struct io_hdr_stats *shi;
 463         struct cifs_stats *ioni, *ionj;
 464
 465         /* Test stdout */
 466         TEST_STDOUT(STDOUT_FILENO);
 467
 468         /* Print time stamp */
 469         if (DISPLAY_TIMESTAMP(flags)) {
 470                 if (DISPLAY_ISO(flags)) {
 471                         strftime(timestamp, sizeof(timestamp), "%FT%T%z", rectime);
 472                 }
 473                 else {
 474                         strftime(timestamp, sizeof(timestamp), "%x %X", rectime);
 475                 }
 476                 printf("%s\n", timestamp);
 477 #ifdef DEBUG
 478                 if (DISPLAY_DEBUG(flags)) {
 479                         fprintf(stderr, "%s\n", timestamp);
 480                 }
 481 #endif
 482         }
 483
 484         /* Interval of time, reduced to one processor */
 485         itv = get_interval(uptime0[!curr], uptime0[curr]);
 486
 487         shi = st_hdr_cifs;
 488
 489         /* Display CIFS stats header */
 490         write_cifs_stat_header(&fctr);
 491
 492         for (i = 0; i < cifs_nr; i++, shi++) {
 493                 if (shi->used) {
 494                         ioni = st_cifs[curr]  + i;
 495                         ionj = st_cifs[!curr] + i;
 496 #ifdef DEBUG
 497                         if (DISPLAY_DEBUG(flags)) {
 498                                 /* Debug output */
 499                                 fprintf(stderr, "name=%s itv=%llu fctr=%d ioni{ rd_bytes=%llu "
 500                                                 "wr_bytes=%llu rd_ops=%llu wr_ops=%llu fopens=%llu "
 501                                                 "fcloses=%llu fdeletes=%llu}\n",
 502                                         shi->name, itv, fctr,
 503                                         ioni->rd_bytes, ioni->wr_bytes,
 504                                         ioni->rd_ops,   ioni->wr_ops,
 505                                         ioni->fopens,   ioni->fcloses,
 506                                         ioni->fdeletes);
 507                         }
 508 #endif
 509                         write_cifs_stat(curr, itv, fctr, shi, ioni, ionj);
 510                 }
 511         }
 512         printf("\n");
 513 }
 514
 515 /*
 516  ***************************************************************************
 517  * Main loop: Read stats from the relevant sources and display them.
 518  *
 519  * IN:
 520  * @count       Number of lines of stats to print.
 521  * @rectime     Current date and time.
 522  ***************************************************************************
 523  */
 524 void rw_io_stat_loop(long int count, struct tm *rectime)
 525 {
 526         int curr = 1;
 527
 528         /* Don't buffer data if redirected to a pipe */
 529         setbuf(stdout, NULL);
 530
 531         do {
 532                 /* Read system uptime (reduced to one processor) */
 533                 uptime0[curr] = 0;
 534                 read_uptime(&(uptime0[curr]));
 535                 if (!uptime0[curr])
 536                         /* Cannot read system uptime (/proc/uptime doesn't exist) */
 537                         exit(2);
 538
 539                 /* Read CIFS stats */
 540                 read_cifs_stat(curr);
 541
 542                 /* Get time */
 543                 get_localtime(rectime, 0);
 544
 545                 /* Print results */
 546                 write_stats(curr, rectime);
 547
 548                 if (count > 0) {
 549                         count--;
 550                 }
 551
 552                 if (count) {
 553                         curr ^= 1;
 554                         pause();
 555                 }
 556         }
 557         while (count);
 558 }
 559
 560 /*
 561  ***************************************************************************
 562  * Main entry to the cifsiostat program.
 563  ***************************************************************************
 564  */
 565 int main(int argc, char **argv)
 566 {
 567         int it = 0;
 568         int opt = 1;
 569         int i;
 570         long count = 1;
 571         struct utsname header;
 572         struct tm rectime;
 573
 574 #ifdef USE_NLS
 575         /* Init National Language Support */
 576         init_nls();
 577 #endif
 578
 579         /* Get HZ */
 580         get_HZ();
 581
 582         /* Process args... */
 583         while (opt < argc) {
 584
 585 #ifdef DEBUG
 586                 if (!strcmp(argv[opt], "--debuginfo")) {
 587                         flags |= I_D_DEBUG;
 588                         opt++;
 589                 } else
 590 #endif
 591                 if (!strncmp(argv[opt], "-", 1)) {
 592                         for (i = 1; *(argv[opt] + i); i++) {
 593
 594                                 switch (*(argv[opt] + i)) {
 595
 596                                 case 'h':
 597                                         /* Display an easy-to-read CIFS report */
 598                                         flags |= I_D_HUMAN_READ;
 599                                         break;
 600
 601                                 case 'k':
 602                                         if (DISPLAY_MEGABYTES(flags)) {
 603                                                 usage(argv[0]);
 604                                         }
 605                                         /* Display stats in kB/s */
 606                                         flags |= I_D_KILOBYTES;
 607                                         break;
 608
 609                                 case 'm':
 610                                         if (DISPLAY_KILOBYTES(flags)) {
 611                                                 usage(argv[0]);
 612                                         }
 613                                         /* Display stats in MB/s */
 614                                         flags |= I_D_MEGABYTES;
 615                                         break;
 616
 617                                 case 't':
 618                                         /* Display timestamp */
 619                                         flags |= I_D_TIMESTAMP;
 620                                         break;
 621
 622                                 case 'V':
 623                                         /* Print version number and exit */
 624                                         print_version();
 625                                         break;
 626
 627                                 default:
 628                                         usage(argv[0]);
 629                                 }
 630                         }
 631                         opt++;
 632                 }
 633
 634                 else if (!it) {
 635                         interval = atol(argv[opt++]);
 636                         if (interval < 0) {
 637                                 usage(argv[0]);
 638                         }
 639                         count = -1;
 640                         it = 1;
 641                 }
 642
 643                 else if (it > 0) {
 644                         count = atol(argv[opt++]);
 645                         if ((count < 1) || !interval) {
 646                                 usage(argv[0]);
 647                         }
 648                         it = -1;
 649                 }
 650                 else {
 651                         usage(argv[0]);
 652                 }
 653         }
 654
 655         if (!interval) {
 656                 count = 1;
 657         }
 658
 659         /* Init structures according to machine architecture */
 660         io_sys_init();
 661
 662         get_localtime(&rectime, 0);
 663
 664         /* Get system name, release number and hostname */
 665         uname(&header);
 666         if (print_gal_header(&rectime, header.sysname, header.release,
 667                              header.nodename, header.machine, cpu_nr)) {
 668                 flags |= I_D_ISO;
 669         }
 670         printf("\n");
 671
 672         /* Set a handler for SIGALRM */
 673         memset(&alrm_act, 0, sizeof(alrm_act));
 674         alrm_act.sa_handler = alarm_handler;
 675         sigaction(SIGALRM, &alrm_act, NULL);
 676         alarm(interval);
 677
 678         /* Main loop */
 679         rw_io_stat_loop(count, &rectime);
 680
 681         /* Free structures */
 682         io_sys_free();
 683
 684         return 0;
 685 }