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 2000
  25#define MAX_ALIASES 500
  26#define MAX_NODES 1024
  27
  28struct 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
  51struct aliasinfo {
  52	char *name;
  53	char *ref;
  54	struct slabinfo *slab;
  55} aliasinfo[MAX_ALIASES];
  56
  57int slabs;
  58int actual_slabs;
  59int aliases;
  60int alias_targets;
  61int highest_node;
  62
  63char buffer[4096];
  64
  65int show_empty;
  66int show_report;
  67int show_alias;
  68int show_slab;
  69int skip_zero = 1;
  70int show_numa;
  71int show_track;
  72int show_first_alias;
  73int validate;
  74int shrink;
  75int show_inverted;
  76int show_single_ref;
  77int show_totals;
  78int sort_size;
  79int sort_active;
  80int set_debug;
  81int show_ops;
  82int sort_partial;
  83int show_activity;
  84int output_lines = -1;
  85int sort_loss;
  86int extended_totals;
  87int show_bytes;
  88int unreclaim_only;
  89
  90/* Debug options */
  91int sanity;
  92int redzone;
  93int poison;
  94int tracking;
  95int tracing;
  96
  97int page_size;
  98
  99regex_t pattern;
 100
 101static 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
 111static 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
 156static unsigned long read_obj(const char *name)
 157{
 158	FILE *f = fopen(name, "r");
 159
 160	if (!f) {
 161		buffer[0] = 0;
 162		if (errno == EACCES)
 163			fatal("%s, Try using superuser\n", strerror(errno));
 164	} else {
 165		if (!fgets(buffer, sizeof(buffer), f))
 166			buffer[0] = 0;
 167		fclose(f);
 168		if (buffer[strlen(buffer)] == '\n')
 169			buffer[strlen(buffer)] = 0;
 170	}
 171	return strlen(buffer);
 172}
 173
 174
 175/*
 176 * Get the contents of an attribute
 177 */
 178static unsigned long get_obj(const char *name)
 179{
 180	if (!read_obj(name))
 181		return 0;
 182
 183	return atol(buffer);
 184}
 185
 186static unsigned long get_obj_and_str(const char *name, char **x)
 187{
 188	unsigned long result = 0;
 189	char *p;
 190
 191	*x = NULL;
 192
 193	if (!read_obj(name)) {
 194		x = NULL;
 195		return 0;
 196	}
 197	result = strtoul(buffer, &p, 10);
 198	while (*p == ' ')
 199		p++;
 200	if (*p)
 201		*x = strdup(p);
 202	return result;
 203}
 204
 205static void set_obj(struct slabinfo *s, const char *name, int n)
 206{
 207	char x[100];
 208	FILE *f;
 209
 210	snprintf(x, 100, "%s/%s", s->name, name);
 211	f = fopen(x, "w");
 212	if (!f)
 213		fatal("Cannot write to %s\n", x);
 214
 215	fprintf(f, "%d\n", n);
 216	fclose(f);
 217}
 218
 219static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
 220{
 221	char x[100];
 222	FILE *f;
 223	size_t l;
 224
 225	snprintf(x, 100, "%s/%s", s->name, name);
 226	f = fopen(x, "r");
 227	if (!f) {
 228		buffer[0] = 0;
 229		l = 0;
 230	} else {
 231		l = fread(buffer, 1, sizeof(buffer), f);
 232		buffer[l] = 0;
 233		fclose(f);
 234	}
 235	return l;
 236}
 237
 238static unsigned long read_debug_slab_obj(struct slabinfo *s, const char *name)
 239{
 240	char x[128];
 241	FILE *f;
 242	size_t l;
 243
 244	snprintf(x, 128, "/sys/kernel/debug/slab/%s/%s", s->name, name);
 245	f = fopen(x, "r");
 246	if (!f) {
 247		buffer[0] = 0;
 248		l = 0;
 249	} else {
 250		l = fread(buffer, 1, sizeof(buffer), f);
 251		buffer[l] = 0;
 252		fclose(f);
 253	}
 254	return l;
 255}
 256
 257/*
 258 * Put a size string together
 259 */
 260static int store_size(char *buffer, unsigned long value)
 261{
 262	unsigned long divisor = 1;
 263	char trailer = 0;
 264	int n;
 265
 266	if (!show_bytes) {
 267		if (value > 1000000000UL) {
 268			divisor = 100000000UL;
 269			trailer = 'G';
 270		} else if (value > 1000000UL) {
 271			divisor = 100000UL;
 272			trailer = 'M';
 273		} else if (value > 1000UL) {
 274			divisor = 100;
 275			trailer = 'K';
 276		}
 277	}
 278
 279	value /= divisor;
 280	n = sprintf(buffer, "%ld",value);
 281	if (trailer) {
 282		buffer[n] = trailer;
 283		n++;
 284		buffer[n] = 0;
 285	}
 286	if (divisor != 1) {
 287		memmove(buffer + n - 2, buffer + n - 3, 4);
 288		buffer[n-2] = '.';
 289		n++;
 290	}
 291	return n;
 292}
 293
 294static void decode_numa_list(int *numa, char *t)
 295{
 296	int node;
 297	int nr;
 298
 299	memset(numa, 0, MAX_NODES * sizeof(int));
 300
 301	if (!t)
 302		return;
 303
 304	while (*t == 'N') {
 305		t++;
 306		node = strtoul(t, &t, 10);
 307		if (*t == '=') {
 308			t++;
 309			nr = strtoul(t, &t, 10);
 310			numa[node] = nr;
 311			if (node > highest_node)
 312				highest_node = node;
 313		}
 314		while (*t == ' ')
 315			t++;
 316	}
 317}
 318
 319static void slab_validate(struct slabinfo *s)
 320{
 321	if (strcmp(s->name, "*") == 0)
 322		return;
 323
 324	set_obj(s, "validate", 1);
 325}
 326
 327static void slab_shrink(struct slabinfo *s)
 328{
 329	if (strcmp(s->name, "*") == 0)
 330		return;
 331
 332	set_obj(s, "shrink", 1);
 333}
 334
 335int line = 0;
 336
 337static void first_line(void)
 338{
 339	if (show_activity)
 340		printf("Name                   Objects      Alloc       Free"
 341			"   %%Fast Fallb O CmpX   UL\n");
 342	else
 343		printf("Name                   Objects Objsize           %s "
 344			"Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n",
 345			sort_loss ? " Loss" : "Space");
 346}
 347
 348/*
 349 * Find the shortest alias of a slab
 350 */
 351static struct aliasinfo *find_one_alias(struct slabinfo *find)
 352{
 353	struct aliasinfo *a;
 354	struct aliasinfo *best = NULL;
 355
 356	for(a = aliasinfo;a < aliasinfo + aliases; a++) {
 357		if (a->slab == find &&
 358			(!best || strlen(best->name) < strlen(a->name))) {
 359				best = a;
 360				if (strncmp(a->name,"kmall", 5) == 0)
 361					return best;
 362			}
 363	}
 364	return best;
 365}
 366
 367static unsigned long slab_size(struct slabinfo *s)
 368{
 369	return 	s->slabs * (page_size << s->order);
 370}
 371
 372static unsigned long slab_activity(struct slabinfo *s)
 373{
 374	return 	s->alloc_fastpath + s->free_fastpath +
 375		s->alloc_slowpath + s->free_slowpath;
 376}
 377
 378static unsigned long slab_waste(struct slabinfo *s)
 379{
 380	return	slab_size(s) - s->objects * s->object_size;
 381}
 382
 383static void slab_numa(struct slabinfo *s, int mode)
 384{
 385	int node;
 386
 387	if (strcmp(s->name, "*") == 0)
 388		return;
 389
 390	if (!highest_node) {
 391		printf("\n%s: No NUMA information available.\n", s->name);
 392		return;
 393	}
 394
 395	if (skip_zero && !s->slabs)
 396		return;
 397
 398	if (!line) {
 399		printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
 400		for(node = 0; node <= highest_node; node++)
 401			printf(" %4d", node);
 402		printf("\n----------------------");
 403		for(node = 0; node <= highest_node; node++)
 404			printf("-----");
 405		printf("\n");
 406	}
 407	printf("%-21s ", mode ? "All slabs" : s->name);
 408	for(node = 0; node <= highest_node; node++) {
 409		char b[20];
 410
 411		store_size(b, s->numa[node]);
 412		printf(" %4s", b);
 413	}
 414	printf("\n");
 415	if (mode) {
 416		printf("%-21s ", "Partial slabs");
 417		for(node = 0; node <= highest_node; node++) {
 418			char b[20];
 419
 420			store_size(b, s->numa_partial[node]);
 421			printf(" %4s", b);
 422		}
 423		printf("\n");
 424	}
 425	line++;
 426}
 427
 428static void show_tracking(struct slabinfo *s)
 429{
 430	printf("\n%s: Kernel object allocation\n", s->name);
 431	printf("-----------------------------------------------------------------------\n");
 432	if (read_debug_slab_obj(s, "alloc_traces"))
 433		printf("%s", buffer);
 434	else if (read_slab_obj(s, "alloc_calls"))
 435		printf("%s", buffer);
 436	else
 437		printf("No Data\n");
 438
 439	printf("\n%s: Kernel object freeing\n", s->name);
 440	printf("------------------------------------------------------------------------\n");
 441	if (read_debug_slab_obj(s, "free_traces"))
 442		printf("%s", buffer);
 443	else if (read_slab_obj(s, "free_calls"))
 444		printf("%s", buffer);
 445	else
 446		printf("No Data\n");
 447
 448}
 449
 450static void ops(struct slabinfo *s)
 451{
 452	if (strcmp(s->name, "*") == 0)
 453		return;
 454
 455	if (read_slab_obj(s, "ops")) {
 456		printf("\n%s: kmem_cache operations\n", s->name);
 457		printf("--------------------------------------------\n");
 458		printf("%s", buffer);
 459	} else
 460		printf("\n%s has no kmem_cache operations\n", s->name);
 461}
 462
 463static const char *onoff(int x)
 464{
 465	if (x)
 466		return "On ";
 467	return "Off";
 468}
 469
 470static void slab_stats(struct slabinfo *s)
 471{
 472	unsigned long total_alloc;
 473	unsigned long total_free;
 474	unsigned long total;
 475
 476	if (!s->alloc_slab)
 477		return;
 478
 479	total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 480	total_free = s->free_fastpath + s->free_slowpath;
 481
 482	if (!total_alloc)
 483		return;
 484
 485	printf("\n");
 486	printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
 487	printf("--------------------------------------------------\n");
 488	printf("Fastpath             %8lu %8lu %3lu %3lu\n",
 489		s->alloc_fastpath, s->free_fastpath,
 490		s->alloc_fastpath * 100 / total_alloc,
 491		total_free ? s->free_fastpath * 100 / total_free : 0);
 492	printf("Slowpath             %8lu %8lu %3lu %3lu\n",
 493		total_alloc - s->alloc_fastpath, s->free_slowpath,
 494		(total_alloc - s->alloc_fastpath) * 100 / total_alloc,
 495		total_free ? s->free_slowpath * 100 / total_free : 0);
 496	printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
 497		s->alloc_slab, s->free_slab,
 498		s->alloc_slab * 100 / total_alloc,
 499		total_free ? s->free_slab * 100 / total_free : 0);
 500	printf("Add partial          %8lu %8lu %3lu %3lu\n",
 501		s->deactivate_to_head + s->deactivate_to_tail,
 502		s->free_add_partial,
 503		(s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
 504		total_free ? s->free_add_partial * 100 / total_free : 0);
 505	printf("Remove partial       %8lu %8lu %3lu %3lu\n",
 506		s->alloc_from_partial, s->free_remove_partial,
 507		s->alloc_from_partial * 100 / total_alloc,
 508		total_free ? s->free_remove_partial * 100 / total_free : 0);
 509
 510	printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
 511		s->cpu_partial_alloc, s->cpu_partial_free,
 512		s->cpu_partial_alloc * 100 / total_alloc,
 513		total_free ? s->cpu_partial_free * 100 / total_free : 0);
 514
 515	printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
 516		s->deactivate_remote_frees, s->free_frozen,
 517		s->deactivate_remote_frees * 100 / total_alloc,
 518		total_free ? s->free_frozen * 100 / total_free : 0);
 519
 520	printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
 521
 522	if (s->cpuslab_flush)
 523		printf("Flushes %8lu\n", s->cpuslab_flush);
 524
 525	total = s->deactivate_full + s->deactivate_empty +
 526			s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
 527
 528	if (total) {
 529		printf("\nSlab Deactivation             Occurrences %%\n");
 530		printf("-------------------------------------------------\n");
 531		printf("Slab full                     %7lu  %3lu%%\n",
 532			s->deactivate_full, (s->deactivate_full * 100) / total);
 533		printf("Slab empty                    %7lu  %3lu%%\n",
 534			s->deactivate_empty, (s->deactivate_empty * 100) / total);
 535		printf("Moved to head of partial list %7lu  %3lu%%\n",
 536			s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
 537		printf("Moved to tail of partial list %7lu  %3lu%%\n",
 538			s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
 539		printf("Deactivation bypass           %7lu  %3lu%%\n",
 540			s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
 541		printf("Refilled from foreign frees   %7lu  %3lu%%\n",
 542			s->alloc_refill, (s->alloc_refill * 100) / total);
 543		printf("Node mismatch                 %7lu  %3lu%%\n",
 544			s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
 545	}
 546
 547	if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail) {
 548		printf("\nCmpxchg_double Looping\n------------------------\n");
 549		printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
 550			s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
 551	}
 552}
 553
 554static void report(struct slabinfo *s)
 555{
 556	if (strcmp(s->name, "*") == 0)
 557		return;
 558
 559	printf("\nSlabcache: %-15s  Aliases: %2d Order : %2d Objects: %lu\n",
 560		s->name, s->aliases, s->order, s->objects);
 561	if (s->hwcache_align)
 562		printf("** Hardware cacheline aligned\n");
 563	if (s->cache_dma)
 564		printf("** Memory is allocated in a special DMA zone\n");
 565	if (s->destroy_by_rcu)
 566		printf("** Slabs are destroyed via RCU\n");
 567	if (s->reclaim_account)
 568		printf("** Reclaim accounting active\n");
 569
 570	printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
 571	printf("------------------------------------------------------------------------\n");
 572	printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
 573			s->object_size, s->slabs, onoff(s->sanity_checks),
 574			s->slabs * (page_size << s->order));
 575	printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
 576			s->slab_size, s->slabs - s->partial - s->cpu_slabs,
 577			onoff(s->red_zone), s->objects * s->object_size);
 578	printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
 579			page_size << s->order, s->partial, onoff(s->poison),
 580			s->slabs * (page_size << s->order) - s->objects * s->object_size);
 581	printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
 582			s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
 583			(s->slab_size - s->object_size) * s->objects);
 584	printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
 585			s->align, s->objs_per_slab, onoff(s->trace),
 586			((page_size << s->order) - s->objs_per_slab * s->slab_size) *
 587			s->slabs);
 588
 589	ops(s);
 590	show_tracking(s);
 591	slab_numa(s, 1);
 592	slab_stats(s);
 593}
 594
 595static void slabcache(struct slabinfo *s)
 596{
 597	char size_str[20];
 598	char dist_str[40];
 599	char flags[20];
 600	char *p = flags;
 601
 602	if (strcmp(s->name, "*") == 0)
 603		return;
 604
 605	if (unreclaim_only && s->reclaim_account)
 606		return;
 607
 608	if (actual_slabs == 1) {
 609		report(s);
 610		return;
 611	}
 612
 613	if (skip_zero && !show_empty && !s->slabs)
 614		return;
 615
 616	if (show_empty && s->slabs)
 617		return;
 618
 619	if (sort_loss == 0)
 620		store_size(size_str, slab_size(s));
 621	else
 622		store_size(size_str, slab_waste(s));
 623	snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
 624						s->partial, s->cpu_slabs);
 625
 626	if (!line++)
 627		first_line();
 628
 629	if (s->aliases)
 630		*p++ = '*';
 631	if (s->cache_dma)
 632		*p++ = 'd';
 633	if (s->hwcache_align)
 634		*p++ = 'A';
 635	if (s->poison)
 636		*p++ = 'P';
 637	if (s->reclaim_account)
 638		*p++ = 'a';
 639	if (s->red_zone)
 640		*p++ = 'Z';
 641	if (s->sanity_checks)
 642		*p++ = 'F';
 643	if (s->store_user)
 644		*p++ = 'U';
 645	if (s->trace)
 646		*p++ = 'T';
 647
 648	*p = 0;
 649	if (show_activity) {
 650		unsigned long total_alloc;
 651		unsigned long total_free;
 652
 653		total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 654		total_free = s->free_fastpath + s->free_slowpath;
 655
 656		printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
 657			s->name, s->objects,
 658			total_alloc, total_free,
 659			total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
 660			total_free ? (s->free_fastpath * 100 / total_free) : 0,
 661			s->order_fallback, s->order, s->cmpxchg_double_fail,
 662			s->cmpxchg_double_cpu_fail);
 663	} else {
 664		printf("%-21s %8ld %7d %15s %14s %4d %1d %3ld %3ld %s\n",
 665			s->name, s->objects, s->object_size, size_str, dist_str,
 666			s->objs_per_slab, s->order,
 667			s->slabs ? (s->partial * 100) / s->slabs : 100,
 668			s->slabs ? (s->objects * s->object_size * 100) /
 669				(s->slabs * (page_size << s->order)) : 100,
 670			flags);
 671	}
 672}
 673
 674/*
 675 * Analyze debug options. Return false if something is amiss.
 676 */
 677static int debug_opt_scan(char *opt)
 678{
 679	if (!opt || !opt[0] || strcmp(opt, "-") == 0)
 680		return 1;
 681
 682	if (strcasecmp(opt, "a") == 0) {
 683		sanity = 1;
 684		poison = 1;
 685		redzone = 1;
 686		tracking = 1;
 687		return 1;
 688	}
 689
 690	for ( ; *opt; opt++)
 691		switch (*opt) {
 692		case 'F' : case 'f':
 693			if (sanity)
 694				return 0;
 695			sanity = 1;
 696			break;
 697		case 'P' : case 'p':
 698			if (poison)
 699				return 0;
 700			poison = 1;
 701			break;
 702
 703		case 'Z' : case 'z':
 704			if (redzone)
 705				return 0;
 706			redzone = 1;
 707			break;
 708
 709		case 'U' : case 'u':
 710			if (tracking)
 711				return 0;
 712			tracking = 1;
 713			break;
 714
 715		case 'T' : case 't':
 716			if (tracing)
 717				return 0;
 718			tracing = 1;
 719			break;
 720		default:
 721			return 0;
 722		}
 723	return 1;
 724}
 725
 726static int slab_empty(struct slabinfo *s)
 727{
 728	if (s->objects > 0)
 729		return 0;
 730
 731	/*
 732	 * We may still have slabs even if there are no objects. Shrinking will
 733	 * remove them.
 734	 */
 735	if (s->slabs != 0)
 736		set_obj(s, "shrink", 1);
 737
 738	return 1;
 739}
 740
 741static void slab_debug(struct slabinfo *s)
 742{
 743	if (strcmp(s->name, "*") == 0)
 744		return;
 745
 746	if (sanity && !s->sanity_checks) {
 747		set_obj(s, "sanity_checks", 1);
 748	}
 749	if (!sanity && s->sanity_checks) {
 750		if (slab_empty(s))
 751			set_obj(s, "sanity_checks", 0);
 752		else
 753			fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
 754	}
 755	if (redzone && !s->red_zone) {
 756		if (slab_empty(s))
 757			set_obj(s, "red_zone", 1);
 758		else
 759			fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
 760	}
 761	if (!redzone && s->red_zone) {
 762		if (slab_empty(s))
 763			set_obj(s, "red_zone", 0);
 764		else
 765			fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
 766	}
 767	if (poison && !s->poison) {
 768		if (slab_empty(s))
 769			set_obj(s, "poison", 1);
 770		else
 771			fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
 772	}
 773	if (!poison && s->poison) {
 774		if (slab_empty(s))
 775			set_obj(s, "poison", 0);
 776		else
 777			fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
 778	}
 779	if (tracking && !s->store_user) {
 780		if (slab_empty(s))
 781			set_obj(s, "store_user", 1);
 782		else
 783			fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
 784	}
 785	if (!tracking && s->store_user) {
 786		if (slab_empty(s))
 787			set_obj(s, "store_user", 0);
 788		else
 789			fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
 790	}
 791	if (tracing && !s->trace) {
 792		if (slabs == 1)
 793			set_obj(s, "trace", 1);
 794		else
 795			fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
 796	}
 797	if (!tracing && s->trace)
 798		set_obj(s, "trace", 1);
 799}
 800
 801static void totals(void)
 802{
 803	struct slabinfo *s;
 804
 805	int used_slabs = 0;
 806	char b1[20], b2[20], b3[20], b4[20];
 807	unsigned long long max = 1ULL << 63;
 808
 809	/* Object size */
 810	unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
 811
 812	/* Number of partial slabs in a slabcache */
 813	unsigned long long min_partial = max, max_partial = 0,
 814				avg_partial, total_partial = 0;
 815
 816	/* Number of slabs in a slab cache */
 817	unsigned long long min_slabs = max, max_slabs = 0,
 818				avg_slabs, total_slabs = 0;
 819
 820	/* Size of the whole slab */
 821	unsigned long long min_size = max, max_size = 0,
 822				avg_size, total_size = 0;
 823
 824	/* Bytes used for object storage in a slab */
 825	unsigned long long min_used = max, max_used = 0,
 826				avg_used, total_used = 0;
 827
 828	/* Waste: Bytes used for alignment and padding */
 829	unsigned long long min_waste = max, max_waste = 0,
 830				avg_waste, total_waste = 0;
 831	/* Number of objects in a slab */
 832	unsigned long long min_objects = max, max_objects = 0,
 833				avg_objects, total_objects = 0;
 834	/* Waste per object */
 835	unsigned long long min_objwaste = max,
 836				max_objwaste = 0, avg_objwaste,
 837				total_objwaste = 0;
 838
 839	/* Memory per object */
 840	unsigned long long min_memobj = max,
 841				max_memobj = 0, avg_memobj,
 842				total_objsize = 0;
 843
 844	/* Percentage of partial slabs per slab */
 845	unsigned long min_ppart = 100, max_ppart = 0,
 846				avg_ppart, total_ppart = 0;
 847
 848	/* Number of objects in partial slabs */
 849	unsigned long min_partobj = max, max_partobj = 0,
 850				avg_partobj, total_partobj = 0;
 851
 852	/* Percentage of partial objects of all objects in a slab */
 853	unsigned long min_ppartobj = 100, max_ppartobj = 0,
 854				avg_ppartobj, total_ppartobj = 0;
 855
 856
 857	for (s = slabinfo; s < slabinfo + slabs; s++) {
 858		unsigned long long size;
 859		unsigned long used;
 860		unsigned long long wasted;
 861		unsigned long long objwaste;
 862		unsigned long percentage_partial_slabs;
 863		unsigned long percentage_partial_objs;
 864
 865		if (!s->slabs || !s->objects)
 866			continue;
 867
 868		used_slabs++;
 869
 870		size = slab_size(s);
 871		used = s->objects * s->object_size;
 872		wasted = size - used;
 873		objwaste = s->slab_size - s->object_size;
 874
 875		percentage_partial_slabs = s->partial * 100 / s->slabs;
 876		if (percentage_partial_slabs > 100)
 877			percentage_partial_slabs = 100;
 878
 879		percentage_partial_objs = s->objects_partial * 100
 880							/ s->objects;
 881
 882		if (percentage_partial_objs > 100)
 883			percentage_partial_objs = 100;
 884
 885		if (s->object_size < min_objsize)
 886			min_objsize = s->object_size;
 887		if (s->partial < min_partial)
 888			min_partial = s->partial;
 889		if (s->slabs < min_slabs)
 890			min_slabs = s->slabs;
 891		if (size < min_size)
 892			min_size = size;
 893		if (wasted < min_waste)
 894			min_waste = wasted;
 895		if (objwaste < min_objwaste)
 896			min_objwaste = objwaste;
 897		if (s->objects < min_objects)
 898			min_objects = s->objects;
 899		if (used < min_used)
 900			min_used = used;
 901		if (s->objects_partial < min_partobj)
 902			min_partobj = s->objects_partial;
 903		if (percentage_partial_slabs < min_ppart)
 904			min_ppart = percentage_partial_slabs;
 905		if (percentage_partial_objs < min_ppartobj)
 906			min_ppartobj = percentage_partial_objs;
 907		if (s->slab_size < min_memobj)
 908			min_memobj = s->slab_size;
 909
 910		if (s->object_size > max_objsize)
 911			max_objsize = s->object_size;
 912		if (s->partial > max_partial)
 913			max_partial = s->partial;
 914		if (s->slabs > max_slabs)
 915			max_slabs = s->slabs;
 916		if (size > max_size)
 917			max_size = size;
 918		if (wasted > max_waste)
 919			max_waste = wasted;
 920		if (objwaste > max_objwaste)
 921			max_objwaste = objwaste;
 922		if (s->objects > max_objects)
 923			max_objects = s->objects;
 924		if (used > max_used)
 925			max_used = used;
 926		if (s->objects_partial > max_partobj)
 927			max_partobj = s->objects_partial;
 928		if (percentage_partial_slabs > max_ppart)
 929			max_ppart = percentage_partial_slabs;
 930		if (percentage_partial_objs > max_ppartobj)
 931			max_ppartobj = percentage_partial_objs;
 932		if (s->slab_size > max_memobj)
 933			max_memobj = s->slab_size;
 934
 935		total_partial += s->partial;
 936		total_slabs += s->slabs;
 937		total_size += size;
 938		total_waste += wasted;
 939
 940		total_objects += s->objects;
 941		total_used += used;
 942		total_partobj += s->objects_partial;
 943		total_ppart += percentage_partial_slabs;
 944		total_ppartobj += percentage_partial_objs;
 945
 946		total_objwaste += s->objects * objwaste;
 947		total_objsize += s->objects * s->slab_size;
 948	}
 949
 950	if (!total_objects) {
 951		printf("No objects\n");
 952		return;
 953	}
 954	if (!used_slabs) {
 955		printf("No slabs\n");
 956		return;
 957	}
 958
 959	/* Per slab averages */
 960	avg_partial = total_partial / used_slabs;
 961	avg_slabs = total_slabs / used_slabs;
 962	avg_size = total_size / used_slabs;
 963	avg_waste = total_waste / used_slabs;
 964
 965	avg_objects = total_objects / used_slabs;
 966	avg_used = total_used / used_slabs;
 967	avg_partobj = total_partobj / used_slabs;
 968	avg_ppart = total_ppart / used_slabs;
 969	avg_ppartobj = total_ppartobj / used_slabs;
 970
 971	/* Per object object sizes */
 972	avg_objsize = total_used / total_objects;
 973	avg_objwaste = total_objwaste / total_objects;
 974	avg_partobj = total_partobj * 100 / total_objects;
 975	avg_memobj = total_objsize / total_objects;
 976
 977	printf("Slabcache Totals\n");
 978	printf("----------------\n");
 979	printf("Slabcaches : %15d   Aliases  : %11d->%-3d  Active:    %3d\n",
 980			slabs, aliases, alias_targets, used_slabs);
 981
 982	store_size(b1, total_size);store_size(b2, total_waste);
 983	store_size(b3, total_waste * 100 / total_used);
 984	printf("Memory used: %15s   # Loss   : %15s   MRatio:%6s%%\n", b1, b2, b3);
 985
 986	store_size(b1, total_objects);store_size(b2, total_partobj);
 987	store_size(b3, total_partobj * 100 / total_objects);
 988	printf("# Objects  : %15s   # PartObj: %15s   ORatio:%6s%%\n", b1, b2, b3);
 989
 990	printf("\n");
 991	printf("Per Cache         Average              "
 992		"Min              Max            Total\n");
 993	printf("---------------------------------------"
 994		"-------------------------------------\n");
 995
 996	store_size(b1, avg_objects);store_size(b2, min_objects);
 997	store_size(b3, max_objects);store_size(b4, total_objects);
 998	printf("#Objects  %15s  %15s  %15s  %15s\n",
 999			b1,	b2,	b3,	b4);
1000
1001	store_size(b1, avg_slabs);store_size(b2, min_slabs);
1002	store_size(b3, max_slabs);store_size(b4, total_slabs);
1003	printf("#Slabs    %15s  %15s  %15s  %15s\n",
1004			b1,	b2,	b3,	b4);
1005
1006	store_size(b1, avg_partial);store_size(b2, min_partial);
1007	store_size(b3, max_partial);store_size(b4, total_partial);
1008	printf("#PartSlab %15s  %15s  %15s  %15s\n",
1009			b1,	b2,	b3,	b4);
1010	store_size(b1, avg_ppart);store_size(b2, min_ppart);
1011	store_size(b3, max_ppart);
1012	store_size(b4, total_partial * 100  / total_slabs);
1013	printf("%%PartSlab%15s%% %15s%% %15s%% %15s%%\n",
1014			b1,	b2,	b3,	b4);
1015
1016	store_size(b1, avg_partobj);store_size(b2, min_partobj);
1017	store_size(b3, max_partobj);
1018	store_size(b4, total_partobj);
1019	printf("PartObjs  %15s  %15s  %15s  %15s\n",
1020			b1,	b2,	b3,	b4);
1021
1022	store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
1023	store_size(b3, max_ppartobj);
1024	store_size(b4, total_partobj * 100 / total_objects);
1025	printf("%% PartObj%15s%% %15s%% %15s%% %15s%%\n",
1026			b1,	b2,	b3,	b4);
1027
1028	store_size(b1, avg_size);store_size(b2, min_size);
1029	store_size(b3, max_size);store_size(b4, total_size);
1030	printf("Memory    %15s  %15s  %15s  %15s\n",
1031			b1,	b2,	b3,	b4);
1032
1033	store_size(b1, avg_used);store_size(b2, min_used);
1034	store_size(b3, max_used);store_size(b4, total_used);
1035	printf("Used      %15s  %15s  %15s  %15s\n",
1036			b1,	b2,	b3,	b4);
1037
1038	store_size(b1, avg_waste);store_size(b2, min_waste);
1039	store_size(b3, max_waste);store_size(b4, total_waste);
1040	printf("Loss      %15s  %15s  %15s  %15s\n",
1041			b1,	b2,	b3,	b4);
1042
1043	printf("\n");
1044	printf("Per Object        Average              "
1045		"Min              Max\n");
1046	printf("---------------------------------------"
1047		"--------------------\n");
1048
1049	store_size(b1, avg_memobj);store_size(b2, min_memobj);
1050	store_size(b3, max_memobj);
1051	printf("Memory    %15s  %15s  %15s\n",
1052			b1,	b2,	b3);
1053	store_size(b1, avg_objsize);store_size(b2, min_objsize);
1054	store_size(b3, max_objsize);
1055	printf("User      %15s  %15s  %15s\n",
1056			b1,	b2,	b3);
1057
1058	store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1059	store_size(b3, max_objwaste);
1060	printf("Loss      %15s  %15s  %15s\n",
1061			b1,	b2,	b3);
1062}
1063
1064static void sort_slabs(void)
1065{
1066	struct slabinfo *s1,*s2;
1067
1068	for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1069		for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1070			int result;
1071
1072			if (sort_size) {
1073				if (slab_size(s1) == slab_size(s2))
1074					result = strcasecmp(s1->name, s2->name);
1075				else
1076					result = slab_size(s1) < slab_size(s2);
1077			} else if (sort_active) {
1078				if (slab_activity(s1) == slab_activity(s2))
1079					result = strcasecmp(s1->name, s2->name);
1080				else
1081					result = slab_activity(s1) < slab_activity(s2);
1082			} else if (sort_loss) {
1083				if (slab_waste(s1) == slab_waste(s2))
1084					result = strcasecmp(s1->name, s2->name);
1085				else
1086					result = slab_waste(s1) < slab_waste(s2);
1087			} else if (sort_partial) {
1088				if (s1->partial == s2->partial)
1089					result = strcasecmp(s1->name, s2->name);
1090				else
1091					result = s1->partial < s2->partial;
1092			} else
1093				result = strcasecmp(s1->name, s2->name);
1094
1095			if (show_inverted)
1096				result = -result;
1097
1098			if (result > 0) {
1099				struct slabinfo t;
1100
1101				memcpy(&t, s1, sizeof(struct slabinfo));
1102				memcpy(s1, s2, sizeof(struct slabinfo));
1103				memcpy(s2, &t, sizeof(struct slabinfo));
1104			}
1105		}
1106	}
1107}
1108
1109static void sort_aliases(void)
1110{
1111	struct aliasinfo *a1,*a2;
1112
1113	for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1114		for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1115			char *n1, *n2;
1116
1117			n1 = a1->name;
1118			n2 = a2->name;
1119			if (show_alias && !show_inverted) {
1120				n1 = a1->ref;
1121				n2 = a2->ref;
1122			}
1123			if (strcasecmp(n1, n2) > 0) {
1124				struct aliasinfo t;
1125
1126				memcpy(&t, a1, sizeof(struct aliasinfo));
1127				memcpy(a1, a2, sizeof(struct aliasinfo));
1128				memcpy(a2, &t, sizeof(struct aliasinfo));
1129			}
1130		}
1131	}
1132}
1133
1134static void link_slabs(void)
1135{
1136	struct aliasinfo *a;
1137	struct slabinfo *s;
1138
1139	for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1140
1141		for (s = slabinfo; s < slabinfo + slabs; s++)
1142			if (strcmp(a->ref, s->name) == 0) {
1143				a->slab = s;
1144				s->refs++;
1145				break;
1146			}
1147		if (s == slabinfo + slabs)
1148			fatal("Unresolved alias %s\n", a->ref);
1149	}
1150}
1151
1152static void alias(void)
1153{
1154	struct aliasinfo *a;
1155	char *active = NULL;
1156
1157	sort_aliases();
1158	link_slabs();
1159
1160	for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1161
1162		if (!show_single_ref && a->slab->refs == 1)
1163			continue;
1164
1165		if (!show_inverted) {
1166			if (active) {
1167				if (strcmp(a->slab->name, active) == 0) {
1168					printf(" %s", a->name);
1169					continue;
1170				}
1171			}
1172			printf("\n%-12s <- %s", a->slab->name, a->name);
1173			active = a->slab->name;
1174		}
1175		else
1176			printf("%-15s -> %s\n", a->name, a->slab->name);
1177	}
1178	if (active)
1179		printf("\n");
1180}
1181
1182
1183static void rename_slabs(void)
1184{
1185	struct slabinfo *s;
1186	struct aliasinfo *a;
1187
1188	for (s = slabinfo; s < slabinfo + slabs; s++) {
1189		if (*s->name != ':')
1190			continue;
1191
1192		if (s->refs > 1 && !show_first_alias)
1193			continue;
1194
1195		a = find_one_alias(s);
1196
1197		if (a)
1198			s->name = a->name;
1199		else {
1200			s->name = "*";
1201			actual_slabs--;
1202		}
1203	}
1204}
1205
1206static int slab_mismatch(char *slab)
1207{
1208	return regexec(&pattern, slab, 0, NULL, 0);
1209}
1210
1211static void read_slab_dir(void)
1212{
1213	DIR *dir;
1214	struct dirent *de;
1215	struct slabinfo *slab = slabinfo;
1216	struct aliasinfo *alias = aliasinfo;
1217	char *p;
1218	char *t;
1219	int count;
1220
1221	if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1222		fatal("SYSFS support for SLUB not active\n");
1223
1224	dir = opendir(".");
1225	while ((de = readdir(dir))) {
1226		if (de->d_name[0] == '.' ||
1227			(de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1228				continue;
1229		switch (de->d_type) {
1230		   case DT_LNK:
1231			if (alias - aliasinfo == MAX_ALIASES)
1232				fatal("Too many aliases\n");
1233			alias->name = strdup(de->d_name);
1234			count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1235
1236			if (count < 0)
1237				fatal("Cannot read symlink %s\n", de->d_name);
1238
1239			buffer[count] = 0;
1240			p = buffer + count;
1241			while (p > buffer && p[-1] != '/')
1242				p--;
1243			alias->ref = strdup(p);
1244			alias++;
1245			break;
1246		   case DT_DIR:
1247			if (slab - slabinfo == MAX_SLABS)
1248				fatal("Too many slabs\n");
1249			if (chdir(de->d_name))
1250				fatal("Unable to access slab %s\n", slab->name);
1251			slab->name = strdup(de->d_name);
1252			slab->alias = 0;
1253			slab->refs = 0;
1254			slab->aliases = get_obj("aliases");
1255			slab->align = get_obj("align");
1256			slab->cache_dma = get_obj("cache_dma");
1257			slab->cpu_slabs = get_obj("cpu_slabs");
1258			slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1259			slab->hwcache_align = get_obj("hwcache_align");
1260			slab->object_size = get_obj("object_size");
1261			slab->objects = get_obj("objects");
1262			slab->objects_partial = get_obj("objects_partial");
1263			slab->objects_total = get_obj("objects_total");
1264			slab->objs_per_slab = get_obj("objs_per_slab");
1265			slab->order = get_obj("order");
1266			slab->partial = get_obj("partial");
1267			slab->partial = get_obj_and_str("partial", &t);
1268			decode_numa_list(slab->numa_partial, t);
1269			free(t);
1270			slab->poison = get_obj("poison");
1271			slab->reclaim_account = get_obj("reclaim_account");
1272			slab->red_zone = get_obj("red_zone");
1273			slab->sanity_checks = get_obj("sanity_checks");
1274			slab->slab_size = get_obj("slab_size");
1275			slab->slabs = get_obj_and_str("slabs", &t);
1276			decode_numa_list(slab->numa, t);
1277			free(t);
1278			slab->store_user = get_obj("store_user");
1279			slab->trace = get_obj("trace");
1280			slab->alloc_fastpath = get_obj("alloc_fastpath");
1281			slab->alloc_slowpath = get_obj("alloc_slowpath");
1282			slab->free_fastpath = get_obj("free_fastpath");
1283			slab->free_slowpath = get_obj("free_slowpath");
1284			slab->free_frozen= get_obj("free_frozen");
1285			slab->free_add_partial = get_obj("free_add_partial");
1286			slab->free_remove_partial = get_obj("free_remove_partial");
1287			slab->alloc_from_partial = get_obj("alloc_from_partial");
1288			slab->alloc_slab = get_obj("alloc_slab");
1289			slab->alloc_refill = get_obj("alloc_refill");
1290			slab->free_slab = get_obj("free_slab");
1291			slab->cpuslab_flush = get_obj("cpuslab_flush");
1292			slab->deactivate_full = get_obj("deactivate_full");
1293			slab->deactivate_empty = get_obj("deactivate_empty");
1294			slab->deactivate_to_head = get_obj("deactivate_to_head");
1295			slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1296			slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1297			slab->order_fallback = get_obj("order_fallback");
1298			slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1299			slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1300			slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1301			slab->cpu_partial_free = get_obj("cpu_partial_free");
1302			slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1303			slab->deactivate_bypass = get_obj("deactivate_bypass");
1304			if (chdir(".."))
1305				fatal("Unable to chdir from slab ../%s\n",
1306				      slab->name);
1307			if (slab->name[0] == ':')
1308				alias_targets++;
1309			slab++;
1310			break;
1311		   default :
1312			fatal("Unknown file type %lx\n", de->d_type);
1313		}
1314	}
1315	closedir(dir);
1316	slabs = slab - slabinfo;
1317	actual_slabs = slabs;
1318	aliases = alias - aliasinfo;
 
 
 
 
1319}
1320
1321static void output_slabs(void)
1322{
1323	struct slabinfo *slab;
1324	int lines = output_lines;
1325
1326	for (slab = slabinfo; (slab < slabinfo + slabs) &&
1327			lines != 0; slab++) {
1328
1329		if (slab->alias)
1330			continue;
1331
1332		if (lines != -1)
1333			lines--;
1334
1335		if (show_numa)
1336			slab_numa(slab, 0);
1337		else if (show_track)
1338			show_tracking(slab);
1339		else if (validate)
1340			slab_validate(slab);
1341		else if (shrink)
1342			slab_shrink(slab);
1343		else if (set_debug)
1344			slab_debug(slab);
1345		else if (show_ops)
1346			ops(slab);
1347		else if (show_slab)
1348			slabcache(slab);
1349		else if (show_report)
1350			report(slab);
1351	}
1352}
1353
1354static void _xtotals(char *heading, char *underline,
1355		     int loss, int size, int partial)
1356{
1357	printf("%s%s", heading, underline);
1358	line = 0;
1359	sort_loss = loss;
1360	sort_size = size;
1361	sort_partial = partial;
1362	sort_slabs();
1363	output_slabs();
1364}
1365
1366static void xtotals(void)
1367{
1368	char *heading, *underline;
1369
1370	totals();
1371
1372	link_slabs();
1373	rename_slabs();
1374
1375	heading = "\nSlabs sorted by size\n";
1376	underline = "--------------------\n";
1377	_xtotals(heading, underline, 0, 1, 0);
1378
1379	heading = "\nSlabs sorted by loss\n";
1380	underline = "--------------------\n";
1381	_xtotals(heading, underline, 1, 0, 0);
1382
1383	heading = "\nSlabs sorted by number of partial slabs\n";
1384	underline = "---------------------------------------\n";
1385	_xtotals(heading, underline, 0, 0, 1);
1386
1387	printf("\n");
1388}
1389
1390struct option opts[] = {
1391	{ "aliases", no_argument, NULL, 'a' },
1392	{ "activity", no_argument, NULL, 'A' },
1393	{ "Bytes", no_argument, NULL, 'B'},
1394	{ "debug", optional_argument, NULL, 'd' },
1395	{ "display-activity", no_argument, NULL, 'D' },
1396	{ "empty", no_argument, NULL, 'e' },
1397	{ "first-alias", no_argument, NULL, 'f' },
1398	{ "help", no_argument, NULL, 'h' },
1399	{ "inverted", no_argument, NULL, 'i'},
1400	{ "slabs", no_argument, NULL, 'l' },
1401	{ "Loss", no_argument, NULL, 'L'},
1402	{ "numa", no_argument, NULL, 'n' },
1403	{ "lines", required_argument, NULL, 'N'},
1404	{ "ops", no_argument, NULL, 'o' },
1405	{ "partial", no_argument, NULL, 'p'},
1406	{ "report", no_argument, NULL, 'r' },
1407	{ "shrink", no_argument, NULL, 's' },
1408	{ "Size", no_argument, NULL, 'S'},
1409	{ "tracking", no_argument, NULL, 't'},
1410	{ "Totals", no_argument, NULL, 'T'},
1411	{ "Unreclaim", no_argument, NULL, 'U'},
1412	{ "validate", no_argument, NULL, 'v' },
1413	{ "Xtotals", no_argument, NULL, 'X'},
1414	{ "zero", no_argument, NULL, 'z' },
1415	{ "1ref", no_argument, NULL, '1'},
1416	{ NULL, 0, NULL, 0 }
1417};
1418
1419int main(int argc, char *argv[])
1420{
1421	int c;
1422	int err;
1423	char *pattern_source;
1424
1425	page_size = getpagesize();
1426
1427	while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:oPrsStTUvXz1",
1428						opts, NULL)) != -1)
1429		switch (c) {
1430		case 'a':
1431			show_alias = 1;
1432			break;
1433		case 'A':
1434			sort_active = 1;
1435			break;
1436		case 'B':
1437			show_bytes = 1;
1438			break;
1439		case 'd':
1440			set_debug = 1;
1441			if (!debug_opt_scan(optarg))
1442				fatal("Invalid debug option '%s'\n", optarg);
1443			break;
1444		case 'D':
1445			show_activity = 1;
1446			break;
1447		case 'e':
1448			show_empty = 1;
1449			break;
1450		case 'f':
1451			show_first_alias = 1;
1452			break;
1453		case 'h':
1454			usage();
1455			return 0;
1456		case 'i':
1457			show_inverted = 1;
1458			break;
1459		case 'l':
1460			show_slab = 1;
1461			break;
1462		case 'L':
1463			sort_loss = 1;
1464			break;
1465		case 'n':
1466			show_numa = 1;
1467			break;
1468		case 'N':
1469			if (optarg) {
1470				output_lines = atoi(optarg);
1471				if (output_lines < 1)
1472					output_lines = 1;
1473			}
1474			break;
1475		case 'o':
1476			show_ops = 1;
1477			break;
1478		case 'r':
1479			show_report = 1;
1480			break;
1481		case 'P':
1482			sort_partial = 1;
1483			break;
1484		case 's':
1485			shrink = 1;
1486			break;
1487		case 'S':
1488			sort_size = 1;
1489			break;
1490		case 't':
1491			show_track = 1;
1492			break;
1493		case 'T':
1494			show_totals = 1;
1495			break;
1496		case 'U':
1497			unreclaim_only = 1;
1498			break;
1499		case 'v':
1500			validate = 1;
1501			break;
1502		case 'X':
1503			if (output_lines == -1)
1504				output_lines = 1;
1505			extended_totals = 1;
1506			show_bytes = 1;
1507			break;
1508		case 'z':
1509			skip_zero = 0;
1510			break;
1511		case '1':
1512			show_single_ref = 1;
1513			break;
1514		default:
1515			fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1516
1517	}
1518
1519	if (!show_slab && !show_alias && !show_track && !show_report
1520		&& !validate && !shrink && !set_debug && !show_ops)
1521			show_slab = 1;
1522
1523	if (argc > optind)
1524		pattern_source = argv[optind];
1525	else
1526		pattern_source = ".*";
1527
1528	err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1529	if (err)
1530		fatal("%s: Invalid pattern '%s' code %d\n",
1531			argv[0], pattern_source, err);
1532	read_slab_dir();
1533	if (show_alias) {
1534		alias();
1535	} else if (extended_totals) {
1536		xtotals();
1537	} else if (show_totals) {
1538		totals();
1539	} else {
1540		link_slabs();
1541		rename_slabs();
1542		sort_slabs();
1543		output_slabs();
1544	}
1545	return 0;
1546}