tools/vm/slabinfo.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Slabinfo: Tool to get reports about slabs
   4  *
   5  * (C) 2007 sgi, Christoph Lameter
   6  * (C) 2011 Linux Foundation, Christoph Lameter
   7  *
   8  * Compile with:
   9  *
  10  * gcc -o slabinfo slabinfo.c
  11  */
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <sys/types.h>
  15 #include <dirent.h>
  16 #include <strings.h>
  17 #include <string.h>
  18 #include <unistd.h>
  19 #include <stdarg.h>
  20 #include <getopt.h>
  21 #include <regex.h>
  22 #include <errno.h>
  23
  24 #define MAX_SLABS 500
  25 #define MAX_ALIASES 500
  26 #define MAX_NODES 1024
  27
  28 struct slabinfo {
  29         char *name;
  30         int alias;
  31         int refs;
  32         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
  33         unsigned int hwcache_align, object_size, objs_per_slab;
  34         unsigned int sanity_checks, slab_size, store_user, trace;
  35         int order, poison, reclaim_account, red_zone;
  36         unsigned long partial, objects, slabs, objects_partial, objects_total;
  37         unsigned long alloc_fastpath, alloc_slowpath;
  38         unsigned long free_fastpath, free_slowpath;
  39         unsigned long free_frozen, free_add_partial, free_remove_partial;
  40         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
  41         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
  42         unsigned long deactivate_to_head, deactivate_to_tail;
  43         unsigned long deactivate_remote_frees, order_fallback;
  44         unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
  45         unsigned long alloc_node_mismatch, deactivate_bypass;
  46         unsigned long cpu_partial_alloc, cpu_partial_free;
  47         int numa[MAX_NODES];
  48         int numa_partial[MAX_NODES];
  49 } slabinfo[MAX_SLABS];
  50
  51 struct aliasinfo {
  52         char *name;
  53         char *ref;
  54         struct slabinfo *slab;
  55 } aliasinfo[MAX_ALIASES];
  56
  57 int slabs;
  58 int actual_slabs;
  59 int aliases;
  60 int alias_targets;
  61 int highest_node;
  62
  63 char buffer[4096];
  64
  65 int show_empty;
  66 int show_report;
  67 int show_alias;
  68 int show_slab;
  69 int skip_zero = 1;
  70 int show_numa;
  71 int show_track;
  72 int show_first_alias;
  73 int validate;
  74 int shrink;
  75 int show_inverted;
  76 int show_single_ref;
  77 int show_totals;
  78 int sort_size;
  79 int sort_active;
  80 int set_debug;
  81 int show_ops;
  82 int sort_partial;
  83 int show_activity;
  84 int output_lines = -1;
  85 int sort_loss;
  86 int extended_totals;
  87 int show_bytes;
  88 int unreclaim_only;
  89
  90 /* Debug options */
  91 int sanity;
  92 int redzone;
  93 int poison;
  94 int tracking;
  95 int tracing;
  96
  97 int page_size;
  98
  99 regex_t pattern;
 100
 101 static void fatal(const char *x, ...)
 102 {
 103         va_list ap;
 104
 105         va_start(ap, x);
 106         vfprintf(stderr, x, ap);
 107         va_end(ap);
 108         exit(EXIT_FAILURE);
 109 }
 110
 111 static void usage(void)
 112 {
 113         printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
 114                 "slabinfo [-aABDefhilLnoPrsStTUvXz1] [N=K] [-dafzput] [slab-regexp]\n"
 115                 "-a|--aliases           Show aliases\n"
 116                 "-A|--activity          Most active slabs first\n"
 117                 "-B|--Bytes             Show size in bytes\n"
 118                 "-D|--display-active    Switch line format to activity\n"
 119                 "-e|--empty             Show empty slabs\n"
 120                 "-f|--first-alias       Show first alias\n"
 121                 "-h|--help              Show usage information\n"
 122                 "-i|--inverted          Inverted list\n"
 123                 "-l|--slabs             Show slabs\n"
 124                 "-L|--Loss              Sort by loss\n"
 125                 "-n|--numa              Show NUMA information\n"
 126                 "-N|--lines=K           Show the first K slabs\n"
 127                 "-o|--ops               Show kmem_cache_ops\n"
 128                 "-P|--partial           Sort by number of partial slabs\n"
 129                 "-r|--report            Detailed report on single slabs\n"
 130                 "-s|--shrink            Shrink slabs\n"
 131                 "-S|--Size              Sort by size\n"
 132                 "-t|--tracking          Show alloc/free information\n"
 133                 "-T|--Totals            Show summary information\n"
 134                 "-U|--Unreclaim         Show unreclaimable slabs only\n"
 135                 "-v|--validate          Validate slabs\n"
 136                 "-X|--Xtotals           Show extended summary information\n"
 137                 "-z|--zero              Include empty slabs\n"
 138                 "-1|--1ref              Single reference\n"
 139
 140                 "\n"
 141                 "-d  | --debug          Switch off all debug options\n"
 142                 "-da | --debug=a        Switch on all debug options (--debug=FZPU)\n"
 143
 144                 "\n"
 145                 "-d[afzput] | --debug=[afzput]\n"
 146                 "    f | F              Sanity Checks (SLAB_CONSISTENCY_CHECKS)\n"
 147                 "    z | Z              Redzoning\n"
 148                 "    p | P              Poisoning\n"
 149                 "    u | U              Tracking\n"
 150                 "    t | T              Tracing\n"
 151
 152                 "\nSorting options (--Loss, --Size, --Partial) are mutually exclusive\n"
 153         );
 154 }
 155
 156 static unsigned long read_obj(const char *name)
 157 {
 158         FILE *f = fopen(name, "r");
 159
 160         if (!f)
 161                 buffer[0] = 0;
 162         else {
 163                 if (!fgets(buffer, sizeof(buffer), f))
 164                         buffer[0] = 0;
 165                 fclose(f);
 166                 if (buffer[strlen(buffer)] == '\n')
 167                         buffer[strlen(buffer)] = 0;
 168         }
 169         return strlen(buffer);
 170 }
 171
 172
 173 /*
 174  * Get the contents of an attribute
 175  */
 176 static unsigned long get_obj(const char *name)
 177 {
 178         if (!read_obj(name))
 179                 return 0;
 180
 181         return atol(buffer);
 182 }
 183
 184 static unsigned long get_obj_and_str(const char *name, char **x)
 185 {
 186         unsigned long result = 0;
 187         char *p;
 188
 189         *x = NULL;
 190
 191         if (!read_obj(name)) {
 192                 x = NULL;
 193                 return 0;
 194         }
 195         result = strtoul(buffer, &p, 10);
 196         while (*p == ' ')
 197                 p++;
 198         if (*p)
 199                 *x = strdup(p);
 200         return result;
 201 }
 202
 203 static void set_obj(struct slabinfo *s, const char *name, int n)
 204 {
 205         char x[100];
 206         FILE *f;
 207
 208         snprintf(x, 100, "%s/%s", s->name, name);
 209         f = fopen(x, "w");
 210         if (!f)
 211                 fatal("Cannot write to %s\n", x);
 212
 213         fprintf(f, "%d\n", n);
 214         fclose(f);
 215 }
 216
 217 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
 218 {
 219         char x[100];
 220         FILE *f;
 221         size_t l;
 222
 223         snprintf(x, 100, "%s/%s", s->name, name);
 224         f = fopen(x, "r");
 225         if (!f) {
 226                 buffer[0] = 0;
 227                 l = 0;
 228         } else {
 229                 l = fread(buffer, 1, sizeof(buffer), f);
 230                 buffer[l] = 0;
 231                 fclose(f);
 232         }
 233         return l;
 234 }
 235
 236
 237 /*
 238  * Put a size string together
 239  */
 240 static int store_size(char *buffer, unsigned long value)
 241 {
 242         unsigned long divisor = 1;
 243         char trailer = 0;
 244         int n;
 245
 246         if (!show_bytes) {
 247                 if (value > 1000000000UL) {
 248                         divisor = 100000000UL;
 249                         trailer = 'G';
 250                 } else if (value > 1000000UL) {
 251                         divisor = 100000UL;
 252                         trailer = 'M';
 253                 } else if (value > 1000UL) {
 254                         divisor = 100;
 255                         trailer = 'K';
 256                 }
 257         }
 258
 259         value /= divisor;
 260         n = sprintf(buffer, "%ld",value);
 261         if (trailer) {
 262                 buffer[n] = trailer;
 263                 n++;
 264                 buffer[n] = 0;
 265         }
 266         if (divisor != 1) {
 267                 memmove(buffer + n - 2, buffer + n - 3, 4);
 268                 buffer[n-2] = '.';
 269                 n++;
 270         }
 271         return n;
 272 }
 273
 274 static void decode_numa_list(int *numa, char *t)
 275 {
 276         int node;
 277         int nr;
 278
 279         memset(numa, 0, MAX_NODES * sizeof(int));
 280
 281         if (!t)
 282                 return;
 283
 284         while (*t == 'N') {
 285                 t++;
 286                 node = strtoul(t, &t, 10);
 287                 if (*t == '=') {
 288                         t++;
 289                         nr = strtoul(t, &t, 10);
 290                         numa[node] = nr;
 291                         if (node > highest_node)
 292                                 highest_node = node;
 293                 }
 294                 while (*t == ' ')
 295                         t++;
 296         }
 297 }
 298
 299 static void slab_validate(struct slabinfo *s)
 300 {
 301         if (strcmp(s->name, "*") == 0)
 302                 return;
 303
 304         set_obj(s, "validate", 1);
 305 }
 306
 307 static void slab_shrink(struct slabinfo *s)
 308 {
 309         if (strcmp(s->name, "*") == 0)
 310                 return;
 311
 312         set_obj(s, "shrink", 1);
 313 }
 314
 315 int line = 0;
 316
 317 static void first_line(void)
 318 {
 319         if (show_activity)
 320                 printf("Name                   Objects      Alloc       Free"
 321                         "   %%Fast Fallb O CmpX   UL\n");
 322         else
 323                 printf("Name                   Objects Objsize           %s "
 324                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n",
 325                         sort_loss ? " Loss" : "Space");
 326 }
 327
 328 /*
 329  * Find the shortest alias of a slab
 330  */
 331 static struct aliasinfo *find_one_alias(struct slabinfo *find)
 332 {
 333         struct aliasinfo *a;
 334         struct aliasinfo *best = NULL;
 335
 336         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
 337                 if (a->slab == find &&
 338                         (!best || strlen(best->name) < strlen(a->name))) {
 339                                 best = a;
 340                                 if (strncmp(a->name,"kmall", 5) == 0)
 341                                         return best;
 342                         }
 343         }
 344         return best;
 345 }
 346
 347 static unsigned long slab_size(struct slabinfo *s)
 348 {
 349         return  s->slabs * (page_size << s->order);
 350 }
 351
 352 static unsigned long slab_activity(struct slabinfo *s)
 353 {
 354         return  s->alloc_fastpath + s->free_fastpath +
 355                 s->alloc_slowpath + s->free_slowpath;
 356 }
 357
 358 static unsigned long slab_waste(struct slabinfo *s)
 359 {
 360         return  slab_size(s) - s->objects * s->object_size;
 361 }
 362
 363 static void slab_numa(struct slabinfo *s, int mode)
 364 {
 365         int node;
 366
 367         if (strcmp(s->name, "*") == 0)
 368                 return;
 369
 370         if (!highest_node) {
 371                 printf("\n%s: No NUMA information available.\n", s->name);
 372                 return;
 373         }
 374
 375         if (skip_zero && !s->slabs)
 376                 return;
 377
 378         if (!line) {
 379                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
 380                 for(node = 0; node <= highest_node; node++)
 381                         printf(" %4d", node);
 382                 printf("\n----------------------");
 383                 for(node = 0; node <= highest_node; node++)
 384                         printf("-----");
 385                 printf("\n");
 386         }
 387         printf("%-21s ", mode ? "All slabs" : s->name);
 388         for(node = 0; node <= highest_node; node++) {
 389                 char b[20];
 390
 391                 store_size(b, s->numa[node]);
 392                 printf(" %4s", b);
 393         }
 394         printf("\n");
 395         if (mode) {
 396                 printf("%-21s ", "Partial slabs");
 397                 for(node = 0; node <= highest_node; node++) {
 398                         char b[20];
 399
 400                         store_size(b, s->numa_partial[node]);
 401                         printf(" %4s", b);
 402                 }
 403                 printf("\n");
 404         }
 405         line++;
 406 }
 407
 408 static void show_tracking(struct slabinfo *s)
 409 {
 410         printf("\n%s: Kernel object allocation\n", s->name);
 411         printf("-----------------------------------------------------------------------\n");
 412         if (read_slab_obj(s, "alloc_calls"))
 413                 printf("%s", buffer);
 414         else
 415                 printf("No Data\n");
 416
 417         printf("\n%s: Kernel object freeing\n", s->name);
 418         printf("------------------------------------------------------------------------\n");
 419         if (read_slab_obj(s, "free_calls"))
 420                 printf("%s", buffer);
 421         else
 422                 printf("No Data\n");
 423
 424 }
 425
 426 static void ops(struct slabinfo *s)
 427 {
 428         if (strcmp(s->name, "*") == 0)
 429                 return;
 430
 431         if (read_slab_obj(s, "ops")) {
 432                 printf("\n%s: kmem_cache operations\n", s->name);
 433                 printf("--------------------------------------------\n");
 434                 printf("%s", buffer);
 435         } else
 436                 printf("\n%s has no kmem_cache operations\n", s->name);
 437 }
 438
 439 static const char *onoff(int x)
 440 {
 441         if (x)
 442                 return "On ";
 443         return "Off";
 444 }
 445
 446 static void slab_stats(struct slabinfo *s)
 447 {
 448         unsigned long total_alloc;
 449         unsigned long total_free;
 450         unsigned long total;
 451
 452         if (!s->alloc_slab)
 453                 return;
 454
 455         total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 456         total_free = s->free_fastpath + s->free_slowpath;
 457
 458         if (!total_alloc)
 459                 return;
 460
 461         printf("\n");
 462         printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
 463         printf("--------------------------------------------------\n");
 464         printf("Fastpath             %8lu %8lu %3lu %3lu\n",
 465                 s->alloc_fastpath, s->free_fastpath,
 466                 s->alloc_fastpath * 100 / total_alloc,
 467                 total_free ? s->free_fastpath * 100 / total_free : 0);
 468         printf("Slowpath             %8lu %8lu %3lu %3lu\n",
 469                 total_alloc - s->alloc_fastpath, s->free_slowpath,
 470                 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
 471                 total_free ? s->free_slowpath * 100 / total_free : 0);
 472         printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
 473                 s->alloc_slab, s->free_slab,
 474                 s->alloc_slab * 100 / total_alloc,
 475                 total_free ? s->free_slab * 100 / total_free : 0);
 476         printf("Add partial          %8lu %8lu %3lu %3lu\n",
 477                 s->deactivate_to_head + s->deactivate_to_tail,
 478                 s->free_add_partial,
 479                 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
 480                 total_free ? s->free_add_partial * 100 / total_free : 0);
 481         printf("Remove partial       %8lu %8lu %3lu %3lu\n",
 482                 s->alloc_from_partial, s->free_remove_partial,
 483                 s->alloc_from_partial * 100 / total_alloc,
 484                 total_free ? s->free_remove_partial * 100 / total_free : 0);
 485
 486         printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
 487                 s->cpu_partial_alloc, s->cpu_partial_free,
 488                 s->cpu_partial_alloc * 100 / total_alloc,
 489                 total_free ? s->cpu_partial_free * 100 / total_free : 0);
 490
 491         printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
 492                 s->deactivate_remote_frees, s->free_frozen,
 493                 s->deactivate_remote_frees * 100 / total_alloc,
 494                 total_free ? s->free_frozen * 100 / total_free : 0);
 495
 496         printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
 497
 498         if (s->cpuslab_flush)
 499                 printf("Flushes %8lu\n", s->cpuslab_flush);
 500
 501         total = s->deactivate_full + s->deactivate_empty +
 502                         s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
 503
 504         if (total) {
 505                 printf("\nSlab Deactivation             Occurrences %%\n");
 506                 printf("-------------------------------------------------\n");
 507                 printf("Slab full                     %7lu  %3lu%%\n",
 508                         s->deactivate_full, (s->deactivate_full * 100) / total);
 509                 printf("Slab empty                    %7lu  %3lu%%\n",
 510                         s->deactivate_empty, (s->deactivate_empty * 100) / total);
 511                 printf("Moved to head of partial list %7lu  %3lu%%\n",
 512                         s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
 513                 printf("Moved to tail of partial list %7lu  %3lu%%\n",
 514                         s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
 515                 printf("Deactivation bypass           %7lu  %3lu%%\n",
 516                         s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
 517                 printf("Refilled from foreign frees   %7lu  %3lu%%\n",
 518                         s->alloc_refill, (s->alloc_refill * 100) / total);
 519                 printf("Node mismatch                 %7lu  %3lu%%\n",
 520                         s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
 521         }
 522
 523         if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
 524                 printf("\nCmpxchg_double Looping\n------------------------\n");
 525                 printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
 526                         s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
 527         }
 528 }
 529
 530 static void report(struct slabinfo *s)
 531 {
 532         if (strcmp(s->name, "*") == 0)
 533                 return;
 534
 535         printf("\nSlabcache: %-15s  Aliases: %2d Order : %2d Objects: %lu\n",
 536                 s->name, s->aliases, s->order, s->objects);
 537         if (s->hwcache_align)
 538                 printf("** Hardware cacheline aligned\n");
 539         if (s->cache_dma)
 540                 printf("** Memory is allocated in a special DMA zone\n");
 541         if (s->destroy_by_rcu)
 542                 printf("** Slabs are destroyed via RCU\n");
 543         if (s->reclaim_account)
 544                 printf("** Reclaim accounting active\n");
 545
 546         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
 547         printf("------------------------------------------------------------------------\n");
 548         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
 549                         s->object_size, s->slabs, onoff(s->sanity_checks),
 550                         s->slabs * (page_size << s->order));
 551         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
 552                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
 553                         onoff(s->red_zone), s->objects * s->object_size);
 554         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
 555                         page_size << s->order, s->partial, onoff(s->poison),
 556                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
 557         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
 558                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
 559                         (s->slab_size - s->object_size) * s->objects);
 560         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
 561                         s->align, s->objs_per_slab, onoff(s->trace),
 562                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
 563                         s->slabs);
 564
 565         ops(s);
 566         show_tracking(s);
 567         slab_numa(s, 1);
 568         slab_stats(s);
 569 }
 570
 571 static void slabcache(struct slabinfo *s)
 572 {
 573         char size_str[20];
 574         char dist_str[40];
 575         char flags[20];
 576         char *p = flags;
 577
 578         if (strcmp(s->name, "*") == 0)
 579                 return;
 580
 581         if (unreclaim_only && s->reclaim_account)
 582                 return;
 583
 584         if (actual_slabs == 1) {
 585                 report(s);
 586                 return;
 587         }
 588
 589         if (skip_zero && !show_empty && !s->slabs)
 590                 return;
 591
 592         if (show_empty && s->slabs)
 593                 return;
 594
 595         if (sort_loss == 0)
 596                 store_size(size_str, slab_size(s));
 597         else
 598                 store_size(size_str, slab_waste(s));
 599         snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
 600                                                 s->partial, s->cpu_slabs);
 601
 602         if (!line++)
 603                 first_line();
 604
 605         if (s->aliases)
 606                 *p++ = '*';
 607         if (s->cache_dma)
 608                 *p++ = 'd';
 609         if (s->hwcache_align)
 610                 *p++ = 'A';
 611         if (s->poison)
 612                 *p++ = 'P';
 613         if (s->reclaim_account)
 614                 *p++ = 'a';
 615         if (s->red_zone)
 616                 *p++ = 'Z';
 617         if (s->sanity_checks)
 618                 *p++ = 'F';
 619         if (s->store_user)
 620                 *p++ = 'U';
 621         if (s->trace)
 622                 *p++ = 'T';
 623
 624         *p = 0;
 625         if (show_activity) {
 626                 unsigned long total_alloc;
 627                 unsigned long total_free;
 628
 629                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 630                 total_free = s->free_fastpath + s->free_slowpath;
 631
 632                 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
 633                         s->name, s->objects,
 634                         total_alloc, total_free,
 635                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
 636                         total_free ? (s->free_fastpath * 100 / total_free) : 0,
 637                         s->order_fallback, s->order, s->cmpxchg_double_fail,
 638                         s->cmpxchg_double_cpu_fail);
 639         } else {
 640                 printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
 641                         s->name, s->objects, s->object_size, size_str, dist_str,
 642                         s->objs_per_slab, s->order,
 643                         s->slabs ? (s->partial * 100) / s->slabs : 100,
 644                         s->slabs ? (s->objects * s->object_size * 100) /
 645                                 (s->slabs * (page_size << s->order)) : 100,
 646                         flags);
 647         }
 648 }
 649
 650 /*
 651  * Analyze debug options. Return false if something is amiss.
 652  */
 653 static int debug_opt_scan(char *opt)
 654 {
 655         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
 656                 return 1;
 657
 658         if (strcasecmp(opt, "a") == 0) {
 659                 sanity = 1;
 660                 poison = 1;
 661                 redzone = 1;
 662                 tracking = 1;
 663                 return 1;
 664         }
 665
 666         for ( ; *opt; opt++)
 667                 switch (*opt) {
 668                 case 'F' : case 'f':
 669                         if (sanity)
 670                                 return 0;
 671                         sanity = 1;
 672                         break;
 673                 case 'P' : case 'p':
 674                         if (poison)
 675                                 return 0;
 676                         poison = 1;
 677                         break;
 678
 679                 case 'Z' : case 'z':
 680                         if (redzone)
 681                                 return 0;
 682                         redzone = 1;
 683                         break;
 684
 685                 case 'U' : case 'u':
 686                         if (tracking)
 687                                 return 0;
 688                         tracking = 1;
 689                         break;
 690
 691                 case 'T' : case 't':
 692                         if (tracing)
 693                                 return 0;
 694                         tracing = 1;
 695                         break;
 696                 default:
 697                         return 0;
 698                 }
 699         return 1;
 700 }
 701
 702 static int slab_empty(struct slabinfo *s)
 703 {
 704         if (s->objects > 0)
 705                 return 0;
 706
 707         /*
 708          * We may still have slabs even if there are no objects. Shrinking will
 709          * remove them.
 710          */
 711         if (s->slabs != 0)
 712                 set_obj(s, "shrink", 1);
 713
 714         return 1;
 715 }
 716
 717 static void slab_debug(struct slabinfo *s)
 718 {
 719         if (strcmp(s->name, "*") == 0)
 720                 return;
 721
 722         if (sanity && !s->sanity_checks) {
 723                 set_obj(s, "sanity_checks", 1);
 724         }
 725         if (!sanity && s->sanity_checks) {
 726                 if (slab_empty(s))
 727                         set_obj(s, "sanity_checks", 0);
 728                 else
 729                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
 730         }
 731         if (redzone && !s->red_zone) {
 732                 if (slab_empty(s))
 733                         set_obj(s, "red_zone", 1);
 734                 else
 735                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
 736         }
 737         if (!redzone && s->red_zone) {
 738                 if (slab_empty(s))
 739                         set_obj(s, "red_zone", 0);
 740                 else
 741                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
 742         }
 743         if (poison && !s->poison) {
 744                 if (slab_empty(s))
 745                         set_obj(s, "poison", 1);
 746                 else
 747                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
 748         }
 749         if (!poison && s->poison) {
 750                 if (slab_empty(s))
 751                         set_obj(s, "poison", 0);
 752                 else
 753                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
 754         }
 755         if (tracking && !s->store_user) {
 756                 if (slab_empty(s))
 757                         set_obj(s, "store_user", 1);
 758                 else
 759                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
 760         }
 761         if (!tracking && s->store_user) {
 762                 if (slab_empty(s))
 763                         set_obj(s, "store_user", 0);
 764                 else
 765                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
 766         }
 767         if (tracing && !s->trace) {
 768                 if (slabs == 1)
 769                         set_obj(s, "trace", 1);
 770                 else
 771                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
 772         }
 773         if (!tracing && s->trace)
 774                 set_obj(s, "trace", 1);
 775 }
 776
 777 static void totals(void)
 778 {
 779         struct slabinfo *s;
 780
 781         int used_slabs = 0;
 782         char b1[20], b2[20], b3[20], b4[20];
 783         unsigned long long max = 1ULL << 63;
 784
 785         /* Object size */
 786         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
 787
 788         /* Number of partial slabs in a slabcache */
 789         unsigned long long min_partial = max, max_partial = 0,
 790                                 avg_partial, total_partial = 0;
 791
 792         /* Number of slabs in a slab cache */
 793         unsigned long long min_slabs = max, max_slabs = 0,
 794                                 avg_slabs, total_slabs = 0;
 795
 796         /* Size of the whole slab */
 797         unsigned long long min_size = max, max_size = 0,
 798                                 avg_size, total_size = 0;
 799
 800         /* Bytes used for object storage in a slab */
 801         unsigned long long min_used = max, max_used = 0,
 802                                 avg_used, total_used = 0;
 803
 804         /* Waste: Bytes used for alignment and padding */
 805         unsigned long long min_waste = max, max_waste = 0,
 806                                 avg_waste, total_waste = 0;
 807         /* Number of objects in a slab */
 808         unsigned long long min_objects = max, max_objects = 0,
 809                                 avg_objects, total_objects = 0;
 810         /* Waste per object */
 811         unsigned long long min_objwaste = max,
 812                                 max_objwaste = 0, avg_objwaste,
 813                                 total_objwaste = 0;
 814
 815         /* Memory per object */
 816         unsigned long long min_memobj = max,
 817                                 max_memobj = 0, avg_memobj,
 818                                 total_objsize = 0;
 819
 820         /* Percentage of partial slabs per slab */
 821         unsigned long min_ppart = 100, max_ppart = 0,
 822                                 avg_ppart, total_ppart = 0;
 823
 824         /* Number of objects in partial slabs */
 825         unsigned long min_partobj = max, max_partobj = 0,
 826                                 avg_partobj, total_partobj = 0;
 827
 828         /* Percentage of partial objects of all objects in a slab */
 829         unsigned long min_ppartobj = 100, max_ppartobj = 0,
 830                                 avg_ppartobj, total_ppartobj = 0;
 831
 832
 833         for (s = slabinfo; s < slabinfo + slabs; s++) {
 834                 unsigned long long size;
 835                 unsigned long used;
 836                 unsigned long long wasted;
 837                 unsigned long long objwaste;
 838                 unsigned long percentage_partial_slabs;
 839                 unsigned long percentage_partial_objs;
 840
 841                 if (!s->slabs || !s->objects)
 842                         continue;
 843
 844                 used_slabs++;
 845
 846                 size = slab_size(s);
 847                 used = s->objects * s->object_size;
 848                 wasted = size - used;
 849                 objwaste = s->slab_size - s->object_size;
 850
 851                 percentage_partial_slabs = s->partial * 100 / s->slabs;
 852                 if (percentage_partial_slabs > 100)
 853                         percentage_partial_slabs = 100;
 854
 855                 percentage_partial_objs = s->objects_partial * 100
 856                                                         / s->objects;
 857
 858                 if (percentage_partial_objs > 100)
 859                         percentage_partial_objs = 100;
 860
 861                 if (s->object_size < min_objsize)
 862                         min_objsize = s->object_size;
 863                 if (s->partial < min_partial)
 864                         min_partial = s->partial;
 865                 if (s->slabs < min_slabs)
 866                         min_slabs = s->slabs;
 867                 if (size < min_size)
 868                         min_size = size;
 869                 if (wasted < min_waste)
 870                         min_waste = wasted;
 871                 if (objwaste < min_objwaste)
 872                         min_objwaste = objwaste;
 873                 if (s->objects < min_objects)
 874                         min_objects = s->objects;
 875                 if (used < min_used)
 876                         min_used = used;
 877                 if (s->objects_partial < min_partobj)
 878                         min_partobj = s->objects_partial;
 879                 if (percentage_partial_slabs < min_ppart)
 880                         min_ppart = percentage_partial_slabs;
 881                 if (percentage_partial_objs < min_ppartobj)
 882                         min_ppartobj = percentage_partial_objs;
 883                 if (s->slab_size < min_memobj)
 884                         min_memobj = s->slab_size;
 885
 886                 if (s->object_size > max_objsize)
 887                         max_objsize = s->object_size;
 888                 if (s->partial > max_partial)
 889                         max_partial = s->partial;
 890                 if (s->slabs > max_slabs)
 891                         max_slabs = s->slabs;
 892                 if (size > max_size)
 893                         max_size = size;
 894                 if (wasted > max_waste)
 895                         max_waste = wasted;
 896                 if (objwaste > max_objwaste)
 897                         max_objwaste = objwaste;
 898                 if (s->objects > max_objects)
 899                         max_objects = s->objects;
 900                 if (used > max_used)
 901                         max_used = used;
 902                 if (s->objects_partial > max_partobj)
 903                         max_partobj = s->objects_partial;
 904                 if (percentage_partial_slabs > max_ppart)
 905                         max_ppart = percentage_partial_slabs;
 906                 if (percentage_partial_objs > max_ppartobj)
 907                         max_ppartobj = percentage_partial_objs;
 908                 if (s->slab_size > max_memobj)
 909                         max_memobj = s->slab_size;
 910
 911                 total_partial += s->partial;
 912                 total_slabs += s->slabs;
 913                 total_size += size;
 914                 total_waste += wasted;
 915
 916                 total_objects += s->objects;
 917                 total_used += used;
 918                 total_partobj += s->objects_partial;
 919                 total_ppart += percentage_partial_slabs;
 920                 total_ppartobj += percentage_partial_objs;
 921
 922                 total_objwaste += s->objects * objwaste;
 923                 total_objsize += s->objects * s->slab_size;
 924         }
 925
 926         if (!total_objects) {
 927                 printf("No objects\n");
 928                 return;
 929         }
 930         if (!used_slabs) {
 931                 printf("No slabs\n");
 932                 return;
 933         }
 934
 935         /* Per slab averages */
 936         avg_partial = total_partial / used_slabs;
 937         avg_slabs = total_slabs / used_slabs;
 938         avg_size = total_size / used_slabs;
 939         avg_waste = total_waste / used_slabs;
 940
 941         avg_objects = total_objects / used_slabs;
 942         avg_used = total_used / used_slabs;
 943         avg_partobj = total_partobj / used_slabs;
 944         avg_ppart = total_ppart / used_slabs;
 945         avg_ppartobj = total_ppartobj / used_slabs;
 946
 947         /* Per object object sizes */
 948         avg_objsize = total_used / total_objects;
 949         avg_objwaste = total_objwaste / total_objects;
 950         avg_partobj = total_partobj * 100 / total_objects;
 951         avg_memobj = total_objsize / total_objects;
 952
 953         printf("Slabcache Totals\n");
 954         printf("----------------\n");
 955         printf("Slabcaches : %15d   Aliases  : %11d->%-3d  Active:    %3d\n",
 956                         slabs, aliases, alias_targets, used_slabs);
 957
 958         store_size(b1, total_size);store_size(b2, total_waste);
 959         store_size(b3, total_waste * 100 / total_used);
 960         printf("Memory used: %15s   # Loss   : %15s   MRatio:%6s%%\n", b1, b2, b3);
 961
 962         store_size(b1, total_objects);store_size(b2, total_partobj);
 963         store_size(b3, total_partobj * 100 / total_objects);
 964         printf("# Objects  : %15s   # PartObj: %15s   ORatio:%6s%%\n", b1, b2, b3);
 965
 966         printf("\n");
 967         printf("Per Cache         Average              "
 968                 "Min              Max            Total\n");
 969         printf("---------------------------------------"
 970                 "-------------------------------------\n");
 971
 972         store_size(b1, avg_objects);store_size(b2, min_objects);
 973         store_size(b3, max_objects);store_size(b4, total_objects);
 974         printf("#Objects  %15s  %15s  %15s  %15s\n",
 975                         b1,     b2,     b3,     b4);
 976
 977         store_size(b1, avg_slabs);store_size(b2, min_slabs);
 978         store_size(b3, max_slabs);store_size(b4, total_slabs);
 979         printf("#Slabs    %15s  %15s  %15s  %15s\n",
 980                         b1,     b2,     b3,     b4);
 981
 982         store_size(b1, avg_partial);store_size(b2, min_partial);
 983         store_size(b3, max_partial);store_size(b4, total_partial);
 984         printf("#PartSlab %15s  %15s  %15s  %15s\n",
 985                         b1,     b2,     b3,     b4);
 986         store_size(b1, avg_ppart);store_size(b2, min_ppart);
 987         store_size(b3, max_ppart);
 988         store_size(b4, total_partial * 100  / total_slabs);
 989         printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
 990                         b1,     b2,     b3,     b4);
 991
 992         store_size(b1, avg_partobj);store_size(b2, min_partobj);
 993         store_size(b3, max_partobj);
 994         store_size(b4, total_partobj);
 995         printf("PartObjs  %15s  %15s  %15s  %15s\n",
 996                         b1,     b2,     b3,     b4);
 997
 998         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
 999         store_size(b3, max_ppartobj);
1000         store_size(b4, total_partobj * 100 / total_objects);
1001         printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
1002                         b1,     b2,     b3,     b4);
1003
1004         store_size(b1, avg_size);store_size(b2, min_size);
1005         store_size(b3, max_size);store_size(b4, total_size);
1006         printf("Memory    %15s  %15s  %15s  %15s\n",
1007                         b1,     b2,     b3,     b4);
1008
1009         store_size(b1, avg_used);store_size(b2, min_used);
1010         store_size(b3, max_used);store_size(b4, total_used);
1011         printf("Used      %15s  %15s  %15s  %15s\n",
1012                         b1,     b2,     b3,     b4);
1013
1014         store_size(b1, avg_waste);store_size(b2, min_waste);
1015         store_size(b3, max_waste);store_size(b4, total_waste);
1016         printf("Loss      %15s  %15s  %15s  %15s\n",
1017                         b1,     b2,     b3,     b4);
1018
1019         printf("\n");
1020         printf("Per Object        Average              "
1021                 "Min              Max\n");
1022         printf("---------------------------------------"
1023                 "--------------------\n");
1024
1025         store_size(b1, avg_memobj);store_size(b2, min_memobj);
1026         store_size(b3, max_memobj);
1027         printf("Memory    %15s  %15s  %15s\n",
1028                         b1,     b2,     b3);
1029         store_size(b1, avg_objsize);store_size(b2, min_objsize);
1030         store_size(b3, max_objsize);
1031         printf("User      %15s  %15s  %15s\n",
1032                         b1,     b2,     b3);
1033
1034         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1035         store_size(b3, max_objwaste);
1036         printf("Loss      %15s  %15s  %15s\n",
1037                         b1,     b2,     b3);
1038 }
1039
1040 static void sort_slabs(void)
1041 {
1042         struct slabinfo *s1,*s2;
1043
1044         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1045                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1046                         int result;
1047
1048                         if (sort_size)
1049                                 result = slab_size(s1) < slab_size(s2);
1050                         else if (sort_active)
1051                                 result = slab_activity(s1) < slab_activity(s2);
1052                         else if (sort_loss)
1053                                 result = slab_waste(s1) < slab_waste(s2);
1054                         else if (sort_partial)
1055                                 result = s1->partial < s2->partial;
1056                         else
1057                                 result = strcasecmp(s1->name, s2->name);
1058
1059                         if (show_inverted)
1060                                 result = -result;
1061
1062                         if (result > 0) {
1063                                 struct slabinfo t;
1064
1065                                 memcpy(&t, s1, sizeof(struct slabinfo));
1066                                 memcpy(s1, s2, sizeof(struct slabinfo));
1067                                 memcpy(s2, &t, sizeof(struct slabinfo));
1068                         }
1069                 }
1070         }
1071 }
1072
1073 static void sort_aliases(void)
1074 {
1075         struct aliasinfo *a1,*a2;
1076
1077         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1078                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1079                         char *n1, *n2;
1080
1081                         n1 = a1->name;
1082                         n2 = a2->name;
1083                         if (show_alias && !show_inverted) {
1084                                 n1 = a1->ref;
1085                                 n2 = a2->ref;
1086                         }
1087                         if (strcasecmp(n1, n2) > 0) {
1088                                 struct aliasinfo t;
1089
1090                                 memcpy(&t, a1, sizeof(struct aliasinfo));
1091                                 memcpy(a1, a2, sizeof(struct aliasinfo));
1092                                 memcpy(a2, &t, sizeof(struct aliasinfo));
1093                         }
1094                 }
1095         }
1096 }
1097
1098 static void link_slabs(void)
1099 {
1100         struct aliasinfo *a;
1101         struct slabinfo *s;
1102
1103         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1104
1105                 for (s = slabinfo; s < slabinfo + slabs; s++)
1106                         if (strcmp(a->ref, s->name) == 0) {
1107                                 a->slab = s;
1108                                 s->refs++;
1109                                 break;
1110                         }
1111                 if (s == slabinfo + slabs)
1112                         fatal("Unresolved alias %s\n", a->ref);
1113         }
1114 }
1115
1116 static void alias(void)
1117 {
1118         struct aliasinfo *a;
1119         char *active = NULL;
1120
1121         sort_aliases();
1122         link_slabs();
1123
1124         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1125
1126                 if (!show_single_ref && a->slab->refs == 1)
1127                         continue;
1128
1129                 if (!show_inverted) {
1130                         if (active) {
1131                                 if (strcmp(a->slab->name, active) == 0) {
1132                                         printf(" %s", a->name);
1133                                         continue;
1134                                 }
1135                         }
1136                         printf("\n%-12s <- %s", a->slab->name, a->name);
1137                         active = a->slab->name;
1138                 }
1139                 else
1140                         printf("%-15s -> %s\n", a->name, a->slab->name);
1141         }
1142         if (active)
1143                 printf("\n");
1144 }
1145
1146
1147 static void rename_slabs(void)
1148 {
1149         struct slabinfo *s;
1150         struct aliasinfo *a;
1151
1152         for (s = slabinfo; s < slabinfo + slabs; s++) {
1153                 if (*s->name != ':')
1154                         continue;
1155
1156                 if (s->refs > 1 && !show_first_alias)
1157                         continue;
1158
1159                 a = find_one_alias(s);
1160
1161                 if (a)
1162                         s->name = a->name;
1163                 else {
1164                         s->name = "*";
1165                         actual_slabs--;
1166                 }
1167         }
1168 }
1169
1170 static int slab_mismatch(char *slab)
1171 {
1172         return regexec(&pattern, slab, 0, NULL, 0);
1173 }
1174
1175 static void read_slab_dir(void)
1176 {
1177         DIR *dir;
1178         struct dirent *de;
1179         struct slabinfo *slab = slabinfo;
1180         struct aliasinfo *alias = aliasinfo;
1181         char *p;
1182         char *t;
1183         int count;
1184
1185         if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1186                 fatal("SYSFS support for SLUB not active\n");
1187
1188         dir = opendir(".");
1189         while ((de = readdir(dir))) {
1190                 if (de->d_name[0] == '.' ||
1191                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1192                                 continue;
1193                 switch (de->d_type) {
1194                    case DT_LNK:
1195                         alias->name = strdup(de->d_name);
1196                         count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1197
1198                         if (count < 0)
1199                                 fatal("Cannot read symlink %s\n", de->d_name);
1200
1201                         buffer[count] = 0;
1202                         p = buffer + count;
1203                         while (p > buffer && p[-1] != '/')
1204                                 p--;
1205                         alias->ref = strdup(p);
1206                         alias++;
1207                         break;
1208                    case DT_DIR:
1209                         if (chdir(de->d_name))
1210                                 fatal("Unable to access slab %s\n", slab->name);
1211                         slab->name = strdup(de->d_name);
1212                         slab->alias = 0;
1213                         slab->refs = 0;
1214                         slab->aliases = get_obj("aliases");
1215                         slab->align = get_obj("align");
1216                         slab->cache_dma = get_obj("cache_dma");
1217                         slab->cpu_slabs = get_obj("cpu_slabs");
1218                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1219                         slab->hwcache_align = get_obj("hwcache_align");
1220                         slab->object_size = get_obj("object_size");
1221                         slab->objects = get_obj("objects");
1222                         slab->objects_partial = get_obj("objects_partial");
1223                         slab->objects_total = get_obj("objects_total");
1224                         slab->objs_per_slab = get_obj("objs_per_slab");
1225                         slab->order = get_obj("order");
1226                         slab->partial = get_obj("partial");
1227                         slab->partial = get_obj_and_str("partial", &t);
1228                         decode_numa_list(slab->numa_partial, t);
1229                         free(t);
1230                         slab->poison = get_obj("poison");
1231                         slab->reclaim_account = get_obj("reclaim_account");
1232                         slab->red_zone = get_obj("red_zone");
1233                         slab->sanity_checks = get_obj("sanity_checks");
1234                         slab->slab_size = get_obj("slab_size");
1235                         slab->slabs = get_obj_and_str("slabs", &t);
1236                         decode_numa_list(slab->numa, t);
1237                         free(t);
1238                         slab->store_user = get_obj("store_user");
1239                         slab->trace = get_obj("trace");
1240                         slab->alloc_fastpath = get_obj("alloc_fastpath");
1241                         slab->alloc_slowpath = get_obj("alloc_slowpath");
1242                         slab->free_fastpath = get_obj("free_fastpath");
1243                         slab->free_slowpath = get_obj("free_slowpath");
1244                         slab->free_frozen= get_obj("free_frozen");
1245                         slab->free_add_partial = get_obj("free_add_partial");
1246                         slab->free_remove_partial = get_obj("free_remove_partial");
1247                         slab->alloc_from_partial = get_obj("alloc_from_partial");
1248                         slab->alloc_slab = get_obj("alloc_slab");
1249                         slab->alloc_refill = get_obj("alloc_refill");
1250                         slab->free_slab = get_obj("free_slab");
1251                         slab->cpuslab_flush = get_obj("cpuslab_flush");
1252                         slab->deactivate_full = get_obj("deactivate_full");
1253                         slab->deactivate_empty = get_obj("deactivate_empty");
1254                         slab->deactivate_to_head = get_obj("deactivate_to_head");
1255                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1256                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1257                         slab->order_fallback = get_obj("order_fallback");
1258                         slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1259                         slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1260                         slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1261                         slab->cpu_partial_free = get_obj("cpu_partial_free");
1262                         slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1263                         slab->deactivate_bypass = get_obj("deactivate_bypass");
1264                         chdir("..");
1265                         if (slab->name[0] == ':')
1266                                 alias_targets++;
1267                         slab++;
1268                         break;
1269                    default :
1270                         fatal("Unknown file type %lx\n", de->d_type);
1271                 }
1272         }
1273         closedir(dir);
1274         slabs = slab - slabinfo;
1275         actual_slabs = slabs;
1276         aliases = alias - aliasinfo;
1277         if (slabs > MAX_SLABS)
1278                 fatal("Too many slabs\n");
1279         if (aliases > MAX_ALIASES)
1280                 fatal("Too many aliases\n");
1281 }
1282
1283 static void output_slabs(void)
1284 {
1285         struct slabinfo *slab;
1286         int lines = output_lines;
1287
1288         for (slab = slabinfo; (slab < slabinfo + slabs) &&
1289                         lines != 0; slab++) {
1290
1291                 if (slab->alias)
1292                         continue;
1293
1294                 if (lines != -1)
1295                         lines--;
1296
1297                 if (show_numa)
1298                         slab_numa(slab, 0);
1299                 else if (show_track)
1300                         show_tracking(slab);
1301                 else if (validate)
1302                         slab_validate(slab);
1303                 else if (shrink)
1304                         slab_shrink(slab);
1305                 else if (set_debug)
1306                         slab_debug(slab);
1307                 else if (show_ops)
1308                         ops(slab);
1309                 else if (show_slab)
1310                         slabcache(slab);
1311                 else if (show_report)
1312                         report(slab);
1313         }
1314 }
1315
1316 static void _xtotals(char *heading, char *underline,
1317                      int loss, int size, int partial)
1318 {
1319         printf("%s%s", heading, underline);
1320         line = 0;
1321         sort_loss = loss;
1322         sort_size = size;
1323         sort_partial = partial;
1324         sort_slabs();
1325         output_slabs();
1326 }
1327
1328 static void xtotals(void)
1329 {
1330         char *heading, *underline;
1331
1332         totals();
1333
1334         link_slabs();
1335         rename_slabs();
1336
1337         heading = "\nSlabs sorted by size\n";
1338         underline = "--------------------\n";
1339         _xtotals(heading, underline, 0, 1, 0);
1340
1341         heading = "\nSlabs sorted by loss\n";
1342         underline = "--------------------\n";
1343         _xtotals(heading, underline, 1, 0, 0);
1344
1345         heading = "\nSlabs sorted by number of partial slabs\n";
1346         underline = "---------------------------------------\n";
1347         _xtotals(heading, underline, 0, 0, 1);
1348
1349         printf("\n");
1350 }
1351
1352 struct option opts[] = {
1353         { "aliases", no_argument, NULL, 'a' },
1354         { "activity", no_argument, NULL, 'A' },
1355         { "Bytes", no_argument, NULL, 'B'},
1356         { "debug", optional_argument, NULL, 'd' },
1357         { "display-activity", no_argument, NULL, 'D' },
1358         { "empty", no_argument, NULL, 'e' },
1359         { "first-alias", no_argument, NULL, 'f' },
1360         { "help", no_argument, NULL, 'h' },
1361         { "inverted", no_argument, NULL, 'i'},
1362         { "slabs", no_argument, NULL, 'l' },
1363         { "Loss", no_argument, NULL, 'L'},
1364         { "numa", no_argument, NULL, 'n' },
1365         { "lines", required_argument, NULL, 'N'},
1366         { "ops", no_argument, NULL, 'o' },
1367         { "partial", no_argument, NULL, 'p'},
1368         { "report", no_argument, NULL, 'r' },
1369         { "shrink", no_argument, NULL, 's' },
1370         { "Size", no_argument, NULL, 'S'},
1371         { "tracking", no_argument, NULL, 't'},
1372         { "Totals", no_argument, NULL, 'T'},
1373         { "Unreclaim", no_argument, NULL, 'U'},
1374         { "validate", no_argument, NULL, 'v' },
1375         { "Xtotals", no_argument, NULL, 'X'},
1376         { "zero", no_argument, NULL, 'z' },
1377         { "1ref", no_argument, NULL, '1'},
1378         { NULL, 0, NULL, 0 }
1379 };
1380
1381 int main(int argc, char *argv[])
1382 {
1383         int c;
1384         int err;
1385         char *pattern_source;
1386
1387         page_size = getpagesize();
1388
1389         while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:oPrsStTUvXz1",
1390                                                 opts, NULL)) != -1)
1391                 switch (c) {
1392                 case 'a':
1393                         show_alias = 1;
1394                         break;
1395                 case 'A':
1396                         sort_active = 1;
1397                         break;
1398                 case 'B':
1399                         show_bytes = 1;
1400                         break;
1401                 case 'd':
1402                         set_debug = 1;
1403                         if (!debug_opt_scan(optarg))
1404                                 fatal("Invalid debug option '%s'\n", optarg);
1405                         break;
1406                 case 'D':
1407                         show_activity = 1;
1408                         break;
1409                 case 'e':
1410                         show_empty = 1;
1411                         break;
1412                 case 'f':
1413                         show_first_alias = 1;
1414                         break;
1415                 case 'h':
1416                         usage();
1417                         return 0;
1418                 case 'i':
1419                         show_inverted = 1;
1420                         break;
1421                 case 'l':
1422                         show_slab = 1;
1423                         break;
1424                 case 'L':
1425                         sort_loss = 1;
1426                         break;
1427                 case 'n':
1428                         show_numa = 1;
1429                         break;
1430                 case 'N':
1431                         if (optarg) {
1432                                 output_lines = atoi(optarg);
1433                                 if (output_lines < 1)
1434                                         output_lines = 1;
1435                         }
1436                         break;
1437                 case 'o':
1438                         show_ops = 1;
1439                         break;
1440                 case 'r':
1441                         show_report = 1;
1442                         break;
1443                 case 'P':
1444                         sort_partial = 1;
1445                         break;
1446                 case 's':
1447                         shrink = 1;
1448                         break;
1449                 case 'S':
1450                         sort_size = 1;
1451                         break;
1452                 case 't':
1453                         show_track = 1;
1454                         break;
1455                 case 'T':
1456                         show_totals = 1;
1457                         break;
1458                 case 'U':
1459                         unreclaim_only = 1;
1460                         break;
1461                 case 'v':
1462                         validate = 1;
1463                         break;
1464                 case 'X':
1465                         if (output_lines == -1)
1466                                 output_lines = 1;
1467                         extended_totals = 1;
1468                         show_bytes = 1;
1469                         break;
1470                 case 'z':
1471                         skip_zero = 0;
1472                         break;
1473                 case '1':
1474                         show_single_ref = 1;
1475                         break;
1476                 default:
1477                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1478
1479         }
1480
1481         if (!show_slab && !show_alias && !show_track && !show_report
1482                 && !validate && !shrink && !set_debug && !show_ops)
1483                         show_slab = 1;
1484
1485         if (argc > optind)
1486                 pattern_source = argv[optind];
1487         else
1488                 pattern_source = ".*";
1489
1490         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1491         if (err)
1492                 fatal("%s: Invalid pattern '%s' code %d\n",
1493                         argv[0], pattern_source, err);
1494         read_slab_dir();
1495         if (show_alias) {
1496                 alias();
1497         } else if (extended_totals) {
1498                 xtotals();
1499         } else if (show_totals) {
1500                 totals();
1501         } else {
1502                 link_slabs();
1503                 rename_slabs();
1504                 sort_slabs();
1505                 output_slabs();
1506         }
1507         return 0;
1508 }