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Additional Linux VM integration
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715f6251 1/*
2 * This file is part of the SPL: Solaris Porting Layer.
3 *
4 * Copyright (c) 2008 Lawrence Livermore National Security, LLC.
5 * Produced at Lawrence Livermore National Laboratory
6 * Written by:
7 * Brian Behlendorf <behlendorf1@llnl.gov>,
8 * Herb Wartens <wartens2@llnl.gov>,
9 * Jim Garlick <garlick@llnl.gov>
10 * UCRL-CODE-235197
11 *
12 * This is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * for more details.
21 *
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 */
26
04a479f7 27#include <sys/proc.h>
57d1b188 28
29#ifdef DEBUG_SUBSYSTEM
30#undef DEBUG_SUBSYSTEM
31#endif
32
33#define DEBUG_SUBSYSTEM S_PROC
34
404992e3 35#ifdef DEBUG_KMEM
57d1b188 36static unsigned long table_min = 0;
37static unsigned long table_max = ~0;
404992e3 38#endif
39
40#ifdef CONFIG_SYSCTL
41static struct ctl_table_header *spl_header = NULL;
c30df9c8 42#endif /* CONFIG_SYSCTL */
43
57d86234 44#if defined(DEBUG_MUTEX) || defined(DEBUG_KMEM) || defined(DEBUG_KSTAT)
c30df9c8 45static struct proc_dir_entry *proc_spl = NULL;
404992e3 46#ifdef DEBUG_MUTEX
c30df9c8 47static struct proc_dir_entry *proc_spl_mutex = NULL;
48static struct proc_dir_entry *proc_spl_mutex_stats = NULL;
49#endif /* DEBUG_MUTEX */
04a479f7 50#ifdef DEBUG_KMEM
c30df9c8 51static struct proc_dir_entry *proc_spl_kmem = NULL;
ff449ac4 52static struct proc_dir_entry *proc_spl_kmem_slab = NULL;
c30df9c8 53#endif /* DEBUG_KMEM */
04a479f7 54#ifdef DEBUG_KSTAT
c30df9c8 55struct proc_dir_entry *proc_spl_kstat = NULL;
56#endif /* DEBUG_KSTAT */
57#endif /* DEBUG_MUTEX || DEBUG_KMEM || DEBUG_KSTAT */
57d1b188 58
57d86234 59#ifdef HAVE_CTL_UNNUMBERED
60
61#define CTL_SPL CTL_UNNUMBERED
62#define CTL_SPL_DEBUG CTL_UNNUMBERED
36b313da 63#define CTL_SPL_VM CTL_UNNUMBERED
57d86234 64#define CTL_SPL_MUTEX CTL_UNNUMBERED
65#define CTL_SPL_KMEM CTL_UNNUMBERED
66#define CTL_SPL_KSTAT CTL_UNNUMBERED
67
68#define CTL_VERSION CTL_UNNUMBERED /* Version */
69#define CTL_HOSTID CTL_UNNUMBERED /* Host id by /usr/bin/hostid */
70#define CTL_HW_SERIAL CTL_UNNUMBERED /* HW serial number by hostid */
71
72#define CTL_DEBUG_SUBSYS CTL_UNNUMBERED /* Debug subsystem */
73#define CTL_DEBUG_MASK CTL_UNNUMBERED /* Debug mask */
74#define CTL_DEBUG_PRINTK CTL_UNNUMBERED /* All messages to console */
75#define CTL_DEBUG_MB CTL_UNNUMBERED /* Debug buffer size */
76#define CTL_DEBUG_BINARY CTL_UNNUMBERED /* Binary data in buffer */
77#define CTL_DEBUG_CATASTROPHE CTL_UNNUMBERED /* Set if BUG'd or panic'd */
78#define CTL_DEBUG_PANIC_ON_BUG CTL_UNNUMBERED /* Should panic on BUG */
79#define CTL_DEBUG_PATH CTL_UNNUMBERED /* Dump log location */
80#define CTL_DEBUG_DUMP CTL_UNNUMBERED /* Dump debug buffer to file */
81#define CTL_DEBUG_FORCE_BUG CTL_UNNUMBERED /* Hook to force a BUG */
82#define CTL_DEBUG_STACK_SIZE CTL_UNNUMBERED /* Max observed stack size */
83
84#define CTL_CONSOLE_RATELIMIT CTL_UNNUMBERED /* Ratelimit console messages */
85#define CTL_CONSOLE_MAX_DELAY_CS CTL_UNNUMBERED /* Max delay skip messages */
86#define CTL_CONSOLE_MIN_DELAY_CS CTL_UNNUMBERED /* Init delay skip messages */
87#define CTL_CONSOLE_BACKOFF CTL_UNNUMBERED /* Delay increase factor */
88
36b313da
BB		 89#define CTL_VM_MINFREE CTL_UNNUMBERED /* Minimum free memory */
90#define CTL_VM_DESFREE CTL_UNNUMBERED /* Desired free memory */
91#define CTL_VM_LOTSFREE CTL_UNNUMBERED /* Lots of free memory */
92#define CTL_VM_NEEDFREE CTL_UNNUMBERED /* Need free memory */
93#define CTL_VM_SWAPFS_MINFREE CTL_UNNUMBERED /* Minimum swapfs memory */
36b313da 94#define CTL_VM_SWAPFS_RESERVE CTL_UNNUMBERED /* Reserved swapfs memory */
4ab13d3b
BB		 95#define CTL_VM_AVAILRMEM CTL_UNNUMBERED /* Easily available memory */
96#define CTL_VM_FREEMEM CTL_UNNUMBERED /* Free memory */
97#define CTL_VM_PHYSMEM CTL_UNNUMBERED /* Total physical memory */
36b313da 98
57d86234 99#ifdef DEBUG_KMEM
100#define CTL_KMEM_KMEMUSED CTL_UNNUMBERED /* Alloc'd kmem bytes */
101#define CTL_KMEM_KMEMMAX CTL_UNNUMBERED /* Max alloc'd by kmem bytes */
102#define CTL_KMEM_VMEMUSED CTL_UNNUMBERED /* Alloc'd vmem bytes */
103#define CTL_KMEM_VMEMMAX CTL_UNNUMBERED /* Max alloc'd by vmem bytes */
104#define CTL_KMEM_ALLOC_FAILED CTL_UNNUMBERED /* Cache allocations failed */
105#endif
106
107#define CTL_MUTEX_STATS CTL_UNNUMBERED /* Global mutex statistics */
108#define CTL_MUTEX_STATS_PER CTL_UNNUMBERED /* Per mutex statistics */
109#define CTL_MUTEX_SPIN_MAX CTL_UNNUMBERED /* Max mutex spin iterations */
110
111#else /* HAVE_CTL_UNNUMBERED */
112
36b313da
BB		 113enum {
114 CTL_SPL = 0x87,
115 CTL_SPL_DEBUG = 0x88,
116 CTL_SPL_VM = 0x89,
117 CTL_SPL_MUTEX = 0x90,
118 CTL_SPL_KMEM = 0x91,
119 CTL_SPL_KSTAT = 0x92,
120};
9ab1ac14 121
57d1b188 122enum {
36b313da
BB		 123 CTL_VERSION = 1, /* Version */
124 CTL_HOSTID, /* Host id reported by /usr/bin/hostid */
125 CTL_HW_SERIAL, /* Hardware serial number from hostid */
126
127 CTL_DEBUG_SUBSYS, /* Debug subsystem */
128 CTL_DEBUG_MASK, /* Debug mask */
129 CTL_DEBUG_PRINTK, /* Force all messages to console */
130 CTL_DEBUG_MB, /* Debug buffer size */
131 CTL_DEBUG_BINARY, /* Include binary data in buffer */
132 CTL_DEBUG_CATASTROPHE, /* Set if we have BUG'd or panic'd */
133 CTL_DEBUG_PANIC_ON_BUG, /* Set if we should panic on BUG */
134 CTL_DEBUG_PATH, /* Dump log location */
135 CTL_DEBUG_DUMP, /* Dump debug buffer to file */
136 CTL_DEBUG_FORCE_BUG, /* Hook to force a BUG */
137 CTL_DEBUG_STACK_SIZE, /* Max observed stack size */
138
139 CTL_CONSOLE_RATELIMIT, /* Ratelimit console messages */
140 CTL_CONSOLE_MAX_DELAY_CS, /* Max delay which we skip messages */
141 CTL_CONSOLE_MIN_DELAY_CS, /* Init delay which we skip messages */
142 CTL_CONSOLE_BACKOFF, /* Delay increase factor */
143
144 CTL_VM_MINFREE, /* Minimum free memory threshold */
145 CTL_VM_DESFREE, /* Desired free memory threshold */
146 CTL_VM_LOTSFREE, /* Lots of free memory threshold */
147 CTL_VM_NEEDFREE, /* Need free memory deficit */
148 CTL_VM_SWAPFS_MINFREE, /* Minimum swapfs memory */
36b313da 149 CTL_VM_SWAPFS_RESERVE, /* Reserved swapfs memory */
4ab13d3b
BB		 150 CTL_VM_AVAILRMEM, /* Easily available memory */
151 CTL_VM_FREEMEM, /* Free memory */
152 CTL_VM_PHYSMEM, /* Total physical memory */
9ab1ac14 153
57d1b188 154#ifdef DEBUG_KMEM
36b313da
BB		 155 CTL_KMEM_KMEMUSED, /* Alloc'd kmem bytes */
156 CTL_KMEM_KMEMMAX, /* Max alloc'd by kmem bytes */
157 CTL_KMEM_VMEMUSED, /* Alloc'd vmem bytes */
158 CTL_KMEM_VMEMMAX, /* Max alloc'd by vmem bytes */
57d1b188 159#endif
9ab1ac14 160
36b313da
BB		 161 CTL_MUTEX_STATS, /* Global mutex statistics */
162 CTL_MUTEX_STATS_PER, /* Per mutex statistics */
163 CTL_MUTEX_SPIN_MAX, /* Maximum mutex spin iterations */
57d1b188 164};
57d86234 165#endif /* HAVE_CTL_UNNUMBERED */
57d1b188 166
167static int
168proc_copyin_string(char *kbuffer, int kbuffer_size,
169 const char *ubuffer, int ubuffer_size)
170{
171 int size;
172
173 if (ubuffer_size > kbuffer_size)
174 return -EOVERFLOW;
175
176 if (copy_from_user((void *)kbuffer, (void *)ubuffer, ubuffer_size))
177 return -EFAULT;
178
179 /* strip trailing whitespace */
180 size = strnlen(kbuffer, ubuffer_size);
181 while (size-- >= 0)
182 if (!isspace(kbuffer[size]))
183 break;
184
185 /* empty string */
186 if (size < 0)
187 return -EINVAL;
188
189 /* no space to terminate */
190 if (size == kbuffer_size)
191 return -EOVERFLOW;
192
193 kbuffer[size + 1] = 0;
194 return 0;
195}
196
197static int
198proc_copyout_string(char *ubuffer, int ubuffer_size,
199 const char *kbuffer, char *append)
200{
201 /* NB if 'append' != NULL, it's a single character to append to the
202 * copied out string - usually "\n", for /proc entries and
203 * (i.e. a terminating zero byte) for sysctl entries
204 */
205 int size = MIN(strlen(kbuffer), ubuffer_size);
206
207 if (copy_to_user(ubuffer, kbuffer, size))
208 return -EFAULT;
209
210 if (append != NULL && size < ubuffer_size) {
211 if (copy_to_user(ubuffer + size, append, 1))
212 return -EFAULT;
213
214 size++;
215 }
216
217 return size;
218}
219
220static int
221proc_dobitmasks(struct ctl_table *table, int write, struct file *filp,
222 void __user *buffer, size_t *lenp, loff_t *ppos)
223{
224 unsigned long *mask = table->data;
225 int is_subsys = (mask == &spl_debug_subsys) ? 1 : 0;
226 int is_printk = (mask == &spl_debug_printk) ? 1 : 0;
227 int size = 512, rc;
228 char *str;
229 ENTRY;
230
231 str = kmem_alloc(size, KM_SLEEP);
232 if (str == NULL)
233 RETURN(-ENOMEM);
234
235 if (write) {
236 rc = proc_copyin_string(str, size, buffer, *lenp);
237 if (rc < 0)
238 RETURN(rc);
239
240 rc = spl_debug_str2mask(mask, str, is_subsys);
241 /* Always print BUG/ASSERT to console, so keep this mask */
242 if (is_printk)
243 *mask |= D_EMERG;
244
245 *ppos += *lenp;
246 } else {
247 rc = spl_debug_mask2str(str, size, *mask, is_subsys);
248 if (*ppos >= rc)
249 rc = 0;
250 else
251 rc = proc_copyout_string(buffer, *lenp,
252 str + *ppos, "\n");
253 if (rc >= 0) {
254 *lenp = rc;
255 *ppos += rc;
256 }
257 }
258
259 kmem_free(str, size);
260 RETURN(rc);
261}
262
263static int
264proc_debug_mb(struct ctl_table *table, int write, struct file *filp,
265 void __user *buffer, size_t *lenp, loff_t *ppos)
266{
267 char str[32];
268 int rc, len;
269 ENTRY;
270
271 if (write) {
272 rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
273 if (rc < 0)
274 RETURN(rc);
275
276 rc = spl_debug_set_mb(simple_strtoul(str, NULL, 0));
277 *ppos += *lenp;
278 } else {
279 len = snprintf(str, sizeof(str), "%d", spl_debug_get_mb());
280 if (*ppos >= len)
281 rc = 0;
282 else
283 rc = proc_copyout_string(buffer, *lenp, str + *ppos, "\n");
284
285 if (rc >= 0) {
286 *lenp = rc;
287 *ppos += rc;
288 }
289 }
290
291 RETURN(rc);
292}
293
294static int
295proc_dump_kernel(struct ctl_table *table, int write, struct file *filp,
296 void __user *buffer, size_t *lenp, loff_t *ppos)
297{
298 ENTRY;
299
300 if (write) {
7fea96c0 301 spl_debug_dumplog(0);
57d1b188 302 *ppos += *lenp;
303 } else {
304 *lenp = 0;
305 }
306
307 RETURN(0);
308}
309
310static int
311proc_force_bug(struct ctl_table *table, int write, struct file *filp,
312 void __user *buffer, size_t *lenp, loff_t *ppos)
313{
314 ENTRY;
315
316 if (write) {
2fae1b3d 317 CERROR("Crashing due to forced SBUG\n");
318 SBUG();
57d1b188 319 /* Unreachable */
320 } else {
321 *lenp = 0;
322 }
323
324 RETURN(0);
325}
326
327static int
328proc_console_max_delay_cs(struct ctl_table *table, int write, struct file *filp,
329 void __user *buffer, size_t *lenp, loff_t *ppos)
330{
331 int rc, max_delay_cs;
332 struct ctl_table dummy = *table;
333 long d;
334 ENTRY;
335
336 dummy.data = &max_delay_cs;
337 dummy.proc_handler = &proc_dointvec;
338
339 if (write) {
340 max_delay_cs = 0;
341 rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
342 if (rc < 0)
343 RETURN(rc);
344
345 if (max_delay_cs <= 0)
346 RETURN(-EINVAL);
347
348 d = (max_delay_cs * HZ) / 100;
349 if (d == 0 || d < spl_console_min_delay)
350 RETURN(-EINVAL);
351
352 spl_console_max_delay = d;
353 } else {
354 max_delay_cs = (spl_console_max_delay * 100) / HZ;
355 rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
356 }
357
358 RETURN(rc);
359}
360
361static int
362proc_console_min_delay_cs(struct ctl_table *table, int write, struct file *filp,
363 void __user *buffer, size_t *lenp, loff_t *ppos)
364{
365 int rc, min_delay_cs;
366 struct ctl_table dummy = *table;
367 long d;
368 ENTRY;
369
370 dummy.data = &min_delay_cs;
371 dummy.proc_handler = &proc_dointvec;
372
373 if (write) {
374 min_delay_cs = 0;
375 rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
376 if (rc < 0)
377 RETURN(rc);
378
379 if (min_delay_cs <= 0)
380 RETURN(-EINVAL);
381
382 d = (min_delay_cs * HZ) / 100;
383 if (d == 0 || d > spl_console_max_delay)
384 RETURN(-EINVAL);
385
386 spl_console_min_delay = d;
387 } else {
388 min_delay_cs = (spl_console_min_delay * 100) / HZ;
389 rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
390 }
391
392 RETURN(rc);
393}
394
395static int
396proc_console_backoff(struct ctl_table *table, int write, struct file *filp,
397 void __user *buffer, size_t *lenp, loff_t *ppos)
398{
399 int rc, backoff;
400 struct ctl_table dummy = *table;
401 ENTRY;
402
403 dummy.data = &backoff;
404 dummy.proc_handler = &proc_dointvec;
405
406 if (write) {
407 backoff = 0;
408 rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
409 if (rc < 0)
410 RETURN(rc);
411
412 if (backoff <= 0)
413 RETURN(-EINVAL);
414
415 spl_console_backoff = backoff;
416 } else {
417 backoff = spl_console_backoff;
418 rc = proc_dointvec(&dummy, write, filp, buffer, lenp, ppos);
419 }
420
421 RETURN(rc);
422}
423
c6dc93d6 424#ifdef DEBUG_KMEM
57d1b188 425static int
426proc_doatomic64(struct ctl_table *table, int write, struct file *filp,
427 void __user *buffer, size_t *lenp, loff_t *ppos)
428{
429 int rc = 0;
430 unsigned long min = 0, max = ~0, val;
431 struct ctl_table dummy = *table;
432 ENTRY;
433
434 dummy.data = &val;
435 dummy.proc_handler = &proc_dointvec;
436 dummy.extra1 = &min;
437 dummy.extra2 = &max;
438
439 if (write) {
440 *ppos += *lenp;
441 } else {
550f1705 442 val = atomic64_read((atomic64_t *)table->data);
57d1b188 443 rc = proc_doulongvec_minmax(&dummy, write, filp,
444 buffer, lenp, ppos);
445 }
446
447 RETURN(rc);
448}
c6dc93d6 449#endif /* DEBUG_KMEM */
57d1b188 450
451static int
452proc_dohostid(struct ctl_table *table, int write, struct file *filp,
453 void __user *buffer, size_t *lenp, loff_t *ppos)
454{
455 int len, rc = 0;
937879f1 456 int32_t val;
57d1b188 457 char *end, str[32];
458 ENTRY;
459
460 if (write) {
461 /* We can't use proc_doulongvec_minmax() in the write
462 * case hear because hostid while a hex value has no
463 * leading 0x which confuses the helper function. */
464 rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
465 if (rc < 0)
466 RETURN(rc);
467
937879f1 468 val = simple_strtol(str, &end, 16);
57d1b188 469 if (str == end)
470 RETURN(-EINVAL);
471
937879f1 472 spl_hostid = (long)val;
12018327 473 (void)snprintf(hw_serial, 11, "%u", (val >= 0) ? val : -val);
57d1b188 474 *ppos += *lenp;
475 } else {
476 len = snprintf(str, sizeof(str), "%lx", spl_hostid);
477 if (*ppos >= len)
478 rc = 0;
479 else
480 rc = proc_copyout_string(buffer, *lenp, str + *ppos, "\n");
481
482 if (rc >= 0) {
483 *lenp = rc;
484 *ppos += rc;
485 }
486 }
487
488 RETURN(rc);
489}
490
4ab13d3b
BB		 491static int
492proc_doavailrmem(struct ctl_table *table, int write, struct file *filp,
493 void __user *buffer, size_t *lenp, loff_t *ppos)
494{
495 int len, rc = 0;
496 char str[32];
497 ENTRY;
498
499 if (write) {
500 *ppos += *lenp;
501 } else {
502 len = snprintf(str, sizeof(str), "%lu", (unsigned long)availrmem);
503 if (*ppos >= len)
504 rc = 0;
505 else
506 rc = proc_copyout_string(buffer, *lenp, str + *ppos, "\n");
507
508 if (rc >= 0) {
509 *lenp = rc;
510 *ppos += rc;
511 }
512 }
513
514 RETURN(rc);
515}
516
517static int
518proc_dofreemem(struct ctl_table *table, int write, struct file *filp,
519 void __user *buffer, size_t *lenp, loff_t *ppos)
520{
521 int len, rc = 0;
522 char str[32];
523 ENTRY;
524
525 if (write) {
526 *ppos += *lenp;
527 } else {
528 len = snprintf(str, sizeof(str), "%lu", (unsigned long)freemem);
529 if (*ppos >= len)
530 rc = 0;
531 else
532 rc = proc_copyout_string(buffer, *lenp, str + *ppos, "\n");
533
534 if (rc >= 0) {
535 *lenp = rc;
536 *ppos += rc;
537 }
538 }
539
540 RETURN(rc);
541}
542
9ab1ac14 543#ifdef DEBUG_MUTEX
544static void
545mutex_seq_show_headers(struct seq_file *f)
546{
547 seq_printf(f, "%-36s %-4s %-16s\t"
548 "e_tot\te_nh\te_sp\te_sl\tte_tot\tte_nh\n",
549 "name", "type", "owner");
550}
551
552static int
553mutex_seq_show(struct seq_file *f, void *p)
554{
555 kmutex_t *mp = p;
556 char t = 'X';
557 int i;
558
559 ASSERT(mp->km_magic == KM_MAGIC);
560
561 switch (mp->km_type) {
562 case MUTEX_DEFAULT: t = 'D'; break;
563 case MUTEX_SPIN: t = 'S'; break;
564 case MUTEX_ADAPTIVE: t = 'A'; break;
565 default:
566 SBUG();
567 }
568 seq_printf(f, "%-36s %c ", mp->km_name, t);
569 if (mp->km_owner)
570 seq_printf(f, "%p\t", mp->km_owner);
571 else
572 seq_printf(f, "%-16s\t", "<not held>");
573
574 for (i = 0; i < MUTEX_STATS_SIZE; i++)
575 seq_printf(f, "%d%c", mp->km_stats[i],
576 (i + 1 == MUTEX_STATS_SIZE) ? '\n' : '\t');
577
578 return 0;
579}
580
581static void *
582mutex_seq_start(struct seq_file *f, loff_t *pos)
583{
584 struct list_head *p;
585 loff_t n = *pos;
586 ENTRY;
587
404992e3 588 spin_lock(&mutex_stats_lock);
9ab1ac14 589 if (!n)
590 mutex_seq_show_headers(f);
591
592 p = mutex_stats_list.next;
593 while (n--) {
594 p = p->next;
595 if (p == &mutex_stats_list)
596 RETURN(NULL);
597 }
598
599 RETURN(list_entry(p, kmutex_t, km_list));
600}
601
602static void *
603mutex_seq_next(struct seq_file *f, void *p, loff_t *pos)
604{
605 kmutex_t *mp = p;
606 ENTRY;
607
608 ++*pos;
609 RETURN((mp->km_list.next == &mutex_stats_list) ?
610 NULL : list_entry(mp->km_list.next, kmutex_t, km_list));
611}
612
613static void
614mutex_seq_stop(struct seq_file *f, void *v)
615{
404992e3 616 spin_unlock(&mutex_stats_lock);
9ab1ac14 617}
618
619static struct seq_operations mutex_seq_ops = {
620 .show = mutex_seq_show,
621 .start = mutex_seq_start,
622 .next = mutex_seq_next,
623 .stop = mutex_seq_stop,
624};
625
626static int
627proc_mutex_open(struct inode *inode, struct file *filp)
628{
629 return seq_open(filp, &mutex_seq_ops);
630}
631
632static struct file_operations proc_mutex_operations = {
633 .open = proc_mutex_open,
634 .read = seq_read,
635 .llseek = seq_lseek,
636 .release = seq_release,
637};
638#endif /* DEBUG_MUTEX */
639
ff449ac4 640#ifdef DEBUG_KMEM
641static void
642slab_seq_show_headers(struct seq_file *f)
643{
644 seq_printf(f, "%-36s\n", "name");
645}
646
647static int
648slab_seq_show(struct seq_file *f, void *p)
649{
650 spl_kmem_cache_t *skc = p;
651
652 ASSERT(skc->skc_magic == SKC_MAGIC);
653
654 spin_lock(&skc->skc_lock);
655 seq_printf(f, "%-36s ", skc->skc_name);
a1502d76 656 seq_printf(f, "%u %u %u - %lu %lu %lu - %lu %lu %lu - %lu %lu %lu\n",
ff449ac4 657 (unsigned)skc->skc_obj_size,
a1502d76 658 (unsigned)skc->skc_slab_objs,
ff449ac4 659 (unsigned)skc->skc_slab_size,
ff449ac4 660 (long unsigned)skc->skc_slab_fail,
661 (long unsigned)skc->skc_slab_create,
662 (long unsigned)skc->skc_slab_destroy,
663 (long unsigned)skc->skc_slab_total,
664 (long unsigned)skc->skc_slab_alloc,
665 (long unsigned)skc->skc_slab_max,
666 (long unsigned)skc->skc_obj_total,
667 (long unsigned)skc->skc_obj_alloc,
a1502d76 668 (long unsigned)skc->skc_obj_max);
ff449ac4 669
670 spin_unlock(&skc->skc_lock);
671
672 return 0;
673}
674
675static void *
676slab_seq_start(struct seq_file *f, loff_t *pos)
677{
678 struct list_head *p;
679 loff_t n = *pos;
680 ENTRY;
681
682 down_read(&spl_kmem_cache_sem);
683 if (!n)
684 slab_seq_show_headers(f);
685
686 p = spl_kmem_cache_list.next;
687 while (n--) {
688 p = p->next;
689 if (p == &spl_kmem_cache_list)
690 RETURN(NULL);
691 }
692
693 RETURN(list_entry(p, spl_kmem_cache_t, skc_list));
694}
695
696static void *
697slab_seq_next(struct seq_file *f, void *p, loff_t *pos)
698{
699 spl_kmem_cache_t *skc = p;
700 ENTRY;
701
702 ++*pos;
703 RETURN((skc->skc_list.next == &spl_kmem_cache_list) ?
704 NULL : list_entry(skc->skc_list.next, spl_kmem_cache_t, skc_list));
705}
706
707static void
708slab_seq_stop(struct seq_file *f, void *v)
709{
710 up_read(&spl_kmem_cache_sem);
711}
712
713static struct seq_operations slab_seq_ops = {
714 .show = slab_seq_show,
715 .start = slab_seq_start,
716 .next = slab_seq_next,
717 .stop = slab_seq_stop,
718};
719
720static int
721proc_slab_open(struct inode *inode, struct file *filp)
722{
723 return seq_open(filp, &slab_seq_ops);
724}
725
726static struct file_operations proc_slab_operations = {
727 .open = proc_slab_open,
728 .read = seq_read,
729 .llseek = seq_lseek,
730 .release = seq_release,
731};
732#endif /* DEBUG_KMEM */
733
9ab1ac14 734static struct ctl_table spl_debug_table[] = {
57d1b188 735 {
736 .ctl_name = CTL_DEBUG_SUBSYS,
9ab1ac14 737 .procname = "subsystem",
57d1b188 738 .data = &spl_debug_subsys,
739 .maxlen = sizeof(unsigned long),
740 .mode = 0644,
741 .proc_handler = &proc_dobitmasks
742 },
743 {
744 .ctl_name = CTL_DEBUG_MASK,
9ab1ac14 745 .procname = "mask",
57d1b188 746 .data = &spl_debug_mask,
747 .maxlen = sizeof(unsigned long),
748 .mode = 0644,
749 .proc_handler = &proc_dobitmasks
750 },
751 {
752 .ctl_name = CTL_DEBUG_PRINTK,
9ab1ac14 753 .procname = "printk",
57d1b188 754 .data = &spl_debug_printk,
755 .maxlen = sizeof(unsigned long),
756 .mode = 0644,
757 .proc_handler = &proc_dobitmasks
758 },
759 {
760 .ctl_name = CTL_DEBUG_MB,
9ab1ac14 761 .procname = "mb",
57d1b188 762 .mode = 0644,
763 .proc_handler = &proc_debug_mb,
764 },
765 {
766 .ctl_name = CTL_DEBUG_BINARY,
9ab1ac14 767 .procname = "binary",
57d1b188 768 .data = &spl_debug_binary,
769 .maxlen = sizeof(int),
770 .mode = 0644,
771 .proc_handler = &proc_dointvec,
772 },
773 {
774 .ctl_name = CTL_DEBUG_CATASTROPHE,
775 .procname = "catastrophe",
776 .data = &spl_debug_catastrophe,
777 .maxlen = sizeof(int),
778 .mode = 0444,
779 .proc_handler = &proc_dointvec,
780 },
781 {
782 .ctl_name = CTL_DEBUG_PANIC_ON_BUG,
783 .procname = "panic_on_bug",
784 .data = &spl_debug_panic_on_bug,
785 .maxlen = sizeof(int),
786 .mode = 0644,
787 .proc_handler = &proc_dointvec
788 },
789 {
790 .ctl_name = CTL_DEBUG_PATH,
9ab1ac14 791 .procname = "path",
57d1b188 792 .data = spl_debug_file_path,
793 .maxlen = sizeof(spl_debug_file_path),
794 .mode = 0644,
795 .proc_handler = &proc_dostring,
796 },
797 {
798 .ctl_name = CTL_DEBUG_DUMP,
9ab1ac14 799 .procname = "dump",
57d1b188 800 .mode = 0200,
801 .proc_handler = &proc_dump_kernel,
802 },
803 { .ctl_name = CTL_DEBUG_FORCE_BUG,
804 .procname = "force_bug",
805 .mode = 0200,
806 .proc_handler = &proc_force_bug,
807 },
808 {
809 .ctl_name = CTL_CONSOLE_RATELIMIT,
810 .procname = "console_ratelimit",
811 .data = &spl_console_ratelimit,
812 .maxlen = sizeof(int),
813 .mode = 0644,
814 .proc_handler = &proc_dointvec,
815 },
816 {
817 .ctl_name = CTL_CONSOLE_MAX_DELAY_CS,
818 .procname = "console_max_delay_centisecs",
819 .maxlen = sizeof(int),
820 .mode = 0644,
821 .proc_handler = &proc_console_max_delay_cs,
822 },
823 {
824 .ctl_name = CTL_CONSOLE_MIN_DELAY_CS,
825 .procname = "console_min_delay_centisecs",
826 .maxlen = sizeof(int),
827 .mode = 0644,
828 .proc_handler = &proc_console_min_delay_cs,
829 },
830 {
831 .ctl_name = CTL_CONSOLE_BACKOFF,
832 .procname = "console_backoff",
833 .maxlen = sizeof(int),
834 .mode = 0644,
835 .proc_handler = &proc_console_backoff,
836 },
837 {
9ab1ac14 838 .ctl_name = CTL_DEBUG_STACK_SIZE,
57d1b188 839 .procname = "stack_max",
840 .data = &spl_debug_stack,
841 .maxlen = sizeof(int),
842 .mode = 0444,
843 .proc_handler = &proc_dointvec,
844 },
9ab1ac14 845 {0},
846};
847
36b313da
BB		 848static struct ctl_table spl_vm_table[] = {
849 {
850 .ctl_name = CTL_VM_MINFREE,
851 .procname = "minfree",
852 .data = &minfree,
853 .maxlen = sizeof(int),
854 .mode = 0644,
855 .proc_handler = &proc_dointvec,
856 },
857 {
858 .ctl_name = CTL_VM_DESFREE,
859 .procname = "desfree",
860 .data = &desfree,
861 .maxlen = sizeof(int),
862 .mode = 0644,
863 .proc_handler = &proc_dointvec,
864 },
865 {
866 .ctl_name = CTL_VM_LOTSFREE,
867 .procname = "lotsfree",
868 .data = &lotsfree,
869 .maxlen = sizeof(int),
870 .mode = 0644,
871 .proc_handler = &proc_dointvec,
872 },
873 {
874 .ctl_name = CTL_VM_NEEDFREE,
875 .procname = "needfree",
876 .data = &needfree,
877 .maxlen = sizeof(int),
878 .mode = 0444,
879 .proc_handler = &proc_dointvec,
880 },
881 {
882 .ctl_name = CTL_VM_SWAPFS_MINFREE,
883 .procname = "swapfs_minfree",
884 .data = &swapfs_minfree,
885 .maxlen = sizeof(int),
886 .mode = 0644,
887 .proc_handler = &proc_dointvec,
888 },
36b313da
BB		 889 {
890 .ctl_name = CTL_VM_SWAPFS_RESERVE,
891 .procname = "swapfs_reserve",
892 .data = &swapfs_reserve,
893 .maxlen = sizeof(int),
894 .mode = 0644,
895 .proc_handler = &proc_dointvec,
896 },
897 {
898 .ctl_name = CTL_VM_AVAILRMEM,
899 .procname = "availrmem",
4ab13d3b
BB		 900 .mode = 0444,
901 .proc_handler = &proc_doavailrmem,
902 },
903 {
904 .ctl_name = CTL_VM_FREEMEM,
905 .procname = "freemem",
906 .data = (void *)2,
907 .maxlen = sizeof(int),
908 .mode = 0444,
909 .proc_handler = &proc_dofreemem,
910 },
911 {
912 .ctl_name = CTL_VM_PHYSMEM,
913 .procname = "physmem",
914 .data = &physmem,
36b313da
BB		 915 .maxlen = sizeof(int),
916 .mode = 0444,
917 .proc_handler = &proc_dointvec,
918 },
919 {0},
920};
921
9ab1ac14 922#ifdef DEBUG_MUTEX
923static struct ctl_table spl_mutex_table[] = {
924 {
925 .ctl_name = CTL_MUTEX_STATS,
926 .procname = "stats",
927 .data = &mutex_stats,
928 .maxlen = sizeof(int) * MUTEX_STATS_SIZE,
929 .mode = 0444,
930 .proc_handler = &proc_dointvec,
931 },
932 {
933 .ctl_name = CTL_MUTEX_SPIN_MAX,
934 .procname = "spin_max",
935 .data = &mutex_spin_max,
936 .maxlen = sizeof(int),
937 .mode = 0644,
938 .proc_handler = &proc_dointvec,
939 },
940 {0},
941};
942#endif /* DEBUG_MUTEX */
943
57d1b188 944#ifdef DEBUG_KMEM
9ab1ac14 945static struct ctl_table spl_kmem_table[] = {
57d1b188 946 {
947 .ctl_name = CTL_KMEM_KMEMUSED,
948 .procname = "kmem_used",
949 .data = &kmem_alloc_used,
950 .maxlen = sizeof(atomic64_t),
951 .mode = 0444,
952 .proc_handler = &proc_doatomic64,
953 },
954 {
955 .ctl_name = CTL_KMEM_KMEMMAX,
956 .procname = "kmem_max",
957 .data = &kmem_alloc_max,
958 .maxlen = sizeof(unsigned long),
959 .extra1 = &table_min,
960 .extra2 = &table_max,
961 .mode = 0444,
962 .proc_handler = &proc_doulongvec_minmax,
963 },
964 {
965 .ctl_name = CTL_KMEM_VMEMUSED,
966 .procname = "vmem_used",
967 .data = &vmem_alloc_used,
968 .maxlen = sizeof(atomic64_t),
969 .mode = 0444,
970 .proc_handler = &proc_doatomic64,
971 },
972 {
973 .ctl_name = CTL_KMEM_VMEMMAX,
974 .procname = "vmem_max",
975 .data = &vmem_alloc_max,
976 .maxlen = sizeof(unsigned long),
977 .extra1 = &table_min,
978 .extra2 = &table_max,
979 .mode = 0444,
980 .proc_handler = &proc_doulongvec_minmax,
981 },
9ab1ac14 982 {0},
983};
04a479f7 984#endif /* DEBUG_KMEM */
985
986#ifdef DEBUG_KSTAT
987static struct ctl_table spl_kstat_table[] = {
988 {0},
989};
990#endif /* DEBUG_KSTAT */
9ab1ac14 991
992static struct ctl_table spl_table[] = {
993 /* NB No .strategy entries have been provided since
994 * sysctl(8) prefers to go via /proc for portability.
995 */
996 {
997 .ctl_name = CTL_VERSION,
998 .procname = "version",
999 .data = spl_version,
1000 .maxlen = sizeof(spl_version),
1001 .mode = 0444,
1002 .proc_handler = &proc_dostring,
1003 },
57d1b188 1004 {
1005 .ctl_name = CTL_HOSTID,
1006 .procname = "hostid",
1007 .data = &spl_hostid,
1008 .maxlen = sizeof(unsigned long),
1009 .mode = 0644,
1010 .proc_handler = &proc_dohostid,
1011 },
1012 {
1013 .ctl_name = CTL_HW_SERIAL,
1014 .procname = "hw_serial",
937879f1 1015 .data = hw_serial,
1016 .maxlen = sizeof(hw_serial),
57d1b188 1017 .mode = 0444,
1018 .proc_handler = &proc_dostring,
1019 },
9ab1ac14 1020 {
1021 .ctl_name = CTL_SPL_DEBUG,
1022 .procname = "debug",
1023 .mode = 0555,
1024 .child = spl_debug_table,
1025 },
36b313da
BB		 1026 {
1027 .ctl_name = CTL_SPL_VM,
1028 .procname = "vm",
1029 .mode = 0555,
1030 .child = spl_vm_table,
1031 },
9ab1ac14 1032#ifdef DEBUG_MUTEX
1033 {
1034 .ctl_name = CTL_SPL_MUTEX,
1035 .procname = "mutex",
1036 .mode = 0555,
1037 .child = spl_mutex_table,
1038 },
1039#endif
1040#ifdef DEBUG_KMEM
1041 {
1042 .ctl_name = CTL_SPL_KMEM,
1043 .procname = "kmem",
1044 .mode = 0555,
1045 .child = spl_kmem_table,
1046 },
04a479f7 1047#endif
1048#ifdef DEBUG_KSTAT
1049 {
1050 .ctl_name = CTL_SPL_KSTAT,
1051 .procname = "kstat",
1052 .mode = 0555,
1053 .child = spl_kstat_table,
1054 },
9ab1ac14 1055#endif
57d1b188 1056 { 0 },
1057};
1058
9ab1ac14 1059static struct ctl_table spl_dir[] = {
57d1b188 1060 {
1061 .ctl_name = CTL_SPL,
1062 .procname = "spl",
1063 .mode = 0555,
1064 .child = spl_table,
1065 },
57d86234 1066 { 0 }
1067};
1068
1069static struct ctl_table spl_root[] = {
1070 {
1071 .ctl_name = CTL_KERN,
1072 .procname = "kernel",
1073 .mode = 0555,
1074 .child = spl_dir,
1075 },
1076 { 0 }
57d1b188 1077};
1078
404992e3 1079static int
1080proc_dir_entry_match(int len, const char *name, struct proc_dir_entry *de)
1081{
1082 if (de->namelen != len)
1083 return 0;
1084
1085 return !memcmp(name, de->name, len);
1086}
1087
04a479f7 1088struct proc_dir_entry *
404992e3 1089proc_dir_entry_find(struct proc_dir_entry *root, const char *str)
1090{
1091 struct proc_dir_entry *de;
1092
1093 for (de = root->subdir; de; de = de->next)
1094 if (proc_dir_entry_match(strlen(str), str, de))
1095 return de;
1096
1097 return NULL;
1098}
1099
04a479f7 1100int
1101proc_dir_entries(struct proc_dir_entry *root)
1102{
1103 struct proc_dir_entry *de;
1104 int i = 0;
1105
1106 for (de = root->subdir; de; de = de->next)
1107 i++;
1108
1109 return i;
1110}
1111
57d1b188 1112int
1113proc_init(void)
1114{
404992e3 1115 int rc = 0;
57d1b188 1116 ENTRY;
1117
1118#ifdef CONFIG_SYSCTL
57d86234 1119 spl_header = spl_register_sysctl_table(spl_root, 0);
57d1b188 1120 if (spl_header == NULL)
1121 RETURN(-EUNATCH);
c30df9c8 1122#endif /* CONFIG_SYSCTL */
9ab1ac14 1123
57d86234 1124#if defined(DEBUG_MUTEX) || defined(DEBUG_KMEM) || defined(DEBUG_KSTAT)
c30df9c8 1125 proc_spl = proc_mkdir("spl", NULL);
1126 if (proc_spl == NULL)
404992e3 1127 GOTO(out, rc = -EUNATCH);
1128
9ab1ac14 1129#ifdef DEBUG_MUTEX
c30df9c8 1130 proc_spl_mutex = proc_mkdir("mutex", proc_spl);
1131 if (proc_spl_mutex == NULL)
404992e3 1132 GOTO(out, rc = -EUNATCH);
1133
c30df9c8 1134 proc_spl_mutex_stats = create_proc_entry("stats_per", 0444,
1135 proc_spl_mutex);
1136 if (proc_spl_mutex_stats == NULL)
404992e3 1137 GOTO(out, rc = -EUNATCH);
1138
c30df9c8 1139 proc_spl_mutex_stats->proc_fops = &proc_mutex_operations;
9ab1ac14 1140#endif /* DEBUG_MUTEX */
04a479f7 1141
1142#ifdef DEBUG_KMEM
c30df9c8 1143 proc_spl_kmem = proc_mkdir("kmem", proc_spl);
1144 if (proc_spl_kmem == NULL)
1145 GOTO(out, rc = -EUNATCH);
ff449ac4 1146
1147 proc_spl_kmem_slab = create_proc_entry("slab", 0444, proc_spl_kmem);
1148 if (proc_spl_kmem_slab == NULL)
1149 GOTO(out, rc = -EUNATCH);
1150
1151 proc_spl_kmem_slab->proc_fops = &proc_slab_operations;
04a479f7 1152#endif /* DEBUG_KMEM */
1153
1154#ifdef DEBUG_KSTAT
c30df9c8 1155 proc_spl_kstat = proc_mkdir("kstat", proc_spl);
1156 if (proc_spl_kstat == NULL)
1157 GOTO(out, rc = -EUNATCH);
04a479f7 1158#endif /* DEBUG_KSTAT */
1159
404992e3 1160out:
c30df9c8 1161 if (rc) {
1162 remove_proc_entry("kstat", proc_spl);
ff449ac4 1163#ifdef DEBUG_KMEM
1164 remove_proc_entry("slab", proc_spl_kmem);
1165#endif
c30df9c8 1166 remove_proc_entry("kmem", proc_spl);
4afaaefa 1167#ifdef DEBUG_MUTEX
c30df9c8 1168 remove_proc_entry("stats_per", proc_spl_mutex);
4afaaefa 1169#endif
c30df9c8 1170 remove_proc_entry("mutex", proc_spl);
a02118a8 1171 remove_proc_entry("spl", NULL);
c30df9c8 1172#ifdef CONFIG_SYSCTL
1173 spl_unregister_sysctl_table(spl_header);
404992e3 1174#endif /* CONFIG_SYSCTL */
c30df9c8 1175 }
1176#endif /* DEBUG_MUTEX || DEBUG_KMEM || DEBUG_KSTAT */
1177
404992e3 1178 RETURN(rc);
57d1b188 1179}
1180
1181void
1182proc_fini(void)
1183{
1184 ENTRY;
1185
c30df9c8 1186#if defined(DEBUG_MUTEX) || defined(DEBUG_KMEM) || defined(DEBUG_KSTAT)
1187 remove_proc_entry("kstat", proc_spl);
ff449ac4 1188#ifdef DEBUG_KMEM
1189 remove_proc_entry("slab", proc_spl_kmem);
1190#endif
c30df9c8 1191 remove_proc_entry("kmem", proc_spl);
4afaaefa 1192#ifdef DEBUG_MUTEX
c30df9c8 1193 remove_proc_entry("stats_per", proc_spl_mutex);
4afaaefa 1194#endif
c30df9c8 1195 remove_proc_entry("mutex", proc_spl);
a02118a8 1196 remove_proc_entry("spl", NULL);
c30df9c8 1197#endif /* DEBUG_MUTEX || DEBUG_KMEM || DEBUG_KSTAT */
1198
57d1b188 1199#ifdef CONFIG_SYSCTL
1200 ASSERT(spl_header != NULL);
57d86234 1201 spl_unregister_sysctl_table(spl_header);
c30df9c8 1202#endif /* CONFIG_SYSCTL */
1203
57d1b188 1204 EXIT;
1205}
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