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
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			alias->name = strdup(de->d_name);
1232			count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1233
1234			if (count < 0)
1235				fatal("Cannot read symlink %s\n", de->d_name);
1236
1237			buffer[count] = 0;
1238			p = buffer + count;
1239			while (p > buffer && p[-1] != '/')
1240				p--;
1241			alias->ref = strdup(p);
1242			alias++;
1243			break;
1244		   case DT_DIR:
1245			if (chdir(de->d_name))
1246				fatal("Unable to access slab %s\n", slab->name);
1247			slab->name = strdup(de->d_name);
1248			slab->alias = 0;
1249			slab->refs = 0;
1250			slab->aliases = get_obj("aliases");
1251			slab->align = get_obj("align");
1252			slab->cache_dma = get_obj("cache_dma");
1253			slab->cpu_slabs = get_obj("cpu_slabs");
1254			slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1255			slab->hwcache_align = get_obj("hwcache_align");
1256			slab->object_size = get_obj("object_size");
1257			slab->objects = get_obj("objects");
1258			slab->objects_partial = get_obj("objects_partial");
1259			slab->objects_total = get_obj("objects_total");
1260			slab->objs_per_slab = get_obj("objs_per_slab");
1261			slab->order = get_obj("order");
1262			slab->partial = get_obj("partial");
1263			slab->partial = get_obj_and_str("partial", &t);
1264			decode_numa_list(slab->numa_partial, t);
1265			free(t);
1266			slab->poison = get_obj("poison");
1267			slab->reclaim_account = get_obj("reclaim_account");
1268			slab->red_zone = get_obj("red_zone");
1269			slab->sanity_checks = get_obj("sanity_checks");
1270			slab->slab_size = get_obj("slab_size");
1271			slab->slabs = get_obj_and_str("slabs", &t);
1272			decode_numa_list(slab->numa, t);
1273			free(t);
1274			slab->store_user = get_obj("store_user");
1275			slab->trace = get_obj("trace");
1276			slab->alloc_fastpath = get_obj("alloc_fastpath");
1277			slab->alloc_slowpath = get_obj("alloc_slowpath");
1278			slab->free_fastpath = get_obj("free_fastpath");
1279			slab->free_slowpath = get_obj("free_slowpath");
1280			slab->free_frozen= get_obj("free_frozen");
1281			slab->free_add_partial = get_obj("free_add_partial");
1282			slab->free_remove_partial = get_obj("free_remove_partial");
1283			slab->alloc_from_partial = get_obj("alloc_from_partial");
1284			slab->alloc_slab = get_obj("alloc_slab");
1285			slab->alloc_refill = get_obj("alloc_refill");
1286			slab->free_slab = get_obj("free_slab");
1287			slab->cpuslab_flush = get_obj("cpuslab_flush");
1288			slab->deactivate_full = get_obj("deactivate_full");
1289			slab->deactivate_empty = get_obj("deactivate_empty");
1290			slab->deactivate_to_head = get_obj("deactivate_to_head");
1291			slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1292			slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1293			slab->order_fallback = get_obj("order_fallback");
1294			slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1295			slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1296			slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1297			slab->cpu_partial_free = get_obj("cpu_partial_free");
1298			slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1299			slab->deactivate_bypass = get_obj("deactivate_bypass");
1300			chdir("..");
1301			if (slab->name[0] == ':')
1302				alias_targets++;
1303			slab++;
1304			break;
1305		   default :
1306			fatal("Unknown file type %lx\n", de->d_type);
1307		}
1308	}
1309	closedir(dir);
1310	slabs = slab - slabinfo;
1311	actual_slabs = slabs;
1312	aliases = alias - aliasinfo;
1313	if (slabs > MAX_SLABS)
1314		fatal("Too many slabs\n");
1315	if (aliases > MAX_ALIASES)
1316		fatal("Too many aliases\n");
1317}
1318
1319static void output_slabs(void)
1320{
1321	struct slabinfo *slab;
1322	int lines = output_lines;
1323
1324	for (slab = slabinfo; (slab < slabinfo + slabs) &&
1325			lines != 0; slab++) {
1326
1327		if (slab->alias)
1328			continue;
1329
1330		if (lines != -1)
1331			lines--;
1332
1333		if (show_numa)
1334			slab_numa(slab, 0);
1335		else if (show_track)
1336			show_tracking(slab);
1337		else if (validate)
1338			slab_validate(slab);
1339		else if (shrink)
1340			slab_shrink(slab);
1341		else if (set_debug)
1342			slab_debug(slab);
1343		else if (show_ops)
1344			ops(slab);
1345		else if (show_slab)
1346			slabcache(slab);
1347		else if (show_report)
1348			report(slab);
1349	}
1350}
1351
1352static void _xtotals(char *heading, char *underline,
1353		     int loss, int size, int partial)
1354{
1355	printf("%s%s", heading, underline);
1356	line = 0;
1357	sort_loss = loss;
1358	sort_size = size;
1359	sort_partial = partial;
1360	sort_slabs();
1361	output_slabs();
1362}
1363
1364static void xtotals(void)
1365{
1366	char *heading, *underline;
1367
1368	totals();
1369
1370	link_slabs();
1371	rename_slabs();
1372
1373	heading = "\nSlabs sorted by size\n";
1374	underline = "--------------------\n";
1375	_xtotals(heading, underline, 0, 1, 0);
1376
1377	heading = "\nSlabs sorted by loss\n";
1378	underline = "--------------------\n";
1379	_xtotals(heading, underline, 1, 0, 0);
1380
1381	heading = "\nSlabs sorted by number of partial slabs\n";
1382	underline = "---------------------------------------\n";
1383	_xtotals(heading, underline, 0, 0, 1);
1384
1385	printf("\n");
1386}
1387
1388struct option opts[] = {
1389	{ "aliases", no_argument, NULL, 'a' },
1390	{ "activity", no_argument, NULL, 'A' },
1391	{ "Bytes", no_argument, NULL, 'B'},
1392	{ "debug", optional_argument, NULL, 'd' },
1393	{ "display-activity", no_argument, NULL, 'D' },
1394	{ "empty", no_argument, NULL, 'e' },
1395	{ "first-alias", no_argument, NULL, 'f' },
1396	{ "help", no_argument, NULL, 'h' },
1397	{ "inverted", no_argument, NULL, 'i'},
1398	{ "slabs", no_argument, NULL, 'l' },
1399	{ "Loss", no_argument, NULL, 'L'},
1400	{ "numa", no_argument, NULL, 'n' },
1401	{ "lines", required_argument, NULL, 'N'},
1402	{ "ops", no_argument, NULL, 'o' },
1403	{ "partial", no_argument, NULL, 'p'},
1404	{ "report", no_argument, NULL, 'r' },
1405	{ "shrink", no_argument, NULL, 's' },
1406	{ "Size", no_argument, NULL, 'S'},
1407	{ "tracking", no_argument, NULL, 't'},
1408	{ "Totals", no_argument, NULL, 'T'},
1409	{ "Unreclaim", no_argument, NULL, 'U'},
1410	{ "validate", no_argument, NULL, 'v' },
1411	{ "Xtotals", no_argument, NULL, 'X'},
1412	{ "zero", no_argument, NULL, 'z' },
1413	{ "1ref", no_argument, NULL, '1'},
1414	{ NULL, 0, NULL, 0 }
1415};
1416
1417int main(int argc, char *argv[])
1418{
1419	int c;
1420	int err;
1421	char *pattern_source;
1422
1423	page_size = getpagesize();
1424
1425	while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:oPrsStTUvXz1",
1426						opts, NULL)) != -1)
1427		switch (c) {
1428		case 'a':
1429			show_alias = 1;
1430			break;
1431		case 'A':
1432			sort_active = 1;
1433			break;
1434		case 'B':
1435			show_bytes = 1;
1436			break;
1437		case 'd':
1438			set_debug = 1;
1439			if (!debug_opt_scan(optarg))
1440				fatal("Invalid debug option '%s'\n", optarg);
1441			break;
1442		case 'D':
1443			show_activity = 1;
1444			break;
1445		case 'e':
1446			show_empty = 1;
1447			break;
1448		case 'f':
1449			show_first_alias = 1;
1450			break;
1451		case 'h':
1452			usage();
1453			return 0;
1454		case 'i':
1455			show_inverted = 1;
1456			break;
1457		case 'l':
1458			show_slab = 1;
1459			break;
1460		case 'L':
1461			sort_loss = 1;
1462			break;
1463		case 'n':
1464			show_numa = 1;
1465			break;
1466		case 'N':
1467			if (optarg) {
1468				output_lines = atoi(optarg);
1469				if (output_lines < 1)
1470					output_lines = 1;
1471			}
1472			break;
1473		case 'o':
1474			show_ops = 1;
1475			break;
1476		case 'r':
1477			show_report = 1;
1478			break;
1479		case 'P':
1480			sort_partial = 1;
1481			break;
1482		case 's':
1483			shrink = 1;
1484			break;
1485		case 'S':
1486			sort_size = 1;
1487			break;
1488		case 't':
1489			show_track = 1;
1490			break;
1491		case 'T':
1492			show_totals = 1;
1493			break;
1494		case 'U':
1495			unreclaim_only = 1;
1496			break;
1497		case 'v':
1498			validate = 1;
1499			break;
1500		case 'X':
1501			if (output_lines == -1)
1502				output_lines = 1;
1503			extended_totals = 1;
1504			show_bytes = 1;
1505			break;
1506		case 'z':
1507			skip_zero = 0;
1508			break;
1509		case '1':
1510			show_single_ref = 1;
1511			break;
1512		default:
1513			fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1514
1515	}
1516
1517	if (!show_slab && !show_alias && !show_track && !show_report
1518		&& !validate && !shrink && !set_debug && !show_ops)
1519			show_slab = 1;
1520
1521	if (argc > optind)
1522		pattern_source = argv[optind];
1523	else
1524		pattern_source = ".*";
1525
1526	err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1527	if (err)
1528		fatal("%s: Invalid pattern '%s' code %d\n",
1529			argv[0], pattern_source, err);
1530	read_slab_dir();
1531	if (show_alias) {
1532		alias();
1533	} else if (extended_totals) {
1534		xtotals();
1535	} else if (show_totals) {
1536		totals();
1537	} else {
1538		link_slabs();
1539		rename_slabs();
1540		sort_slabs();
1541		output_slabs();
1542	}
1543	return 0;
1544}
1545