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716154c5
BB		 1/*****************************************************************************\
2 * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
3 * Copyright (C) 2007 The Regents of the University of California.
4 * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
5 * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
715f6251 6 * UCRL-CODE-235197
7 *
716154c5
BB		 8 * This file is part of the SPL, Solaris Porting Layer.
9 * For details, see <http://github.com/behlendorf/spl/>.
10 *
11 * The SPL is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
715f6251 15 *
716154c5 16 * The SPL is distributed in the hope that it will be useful, but WITHOUT
715f6251 17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 * for more details.
20 *
21 * You should have received a copy of the GNU General Public License along
716154c5
BB		 22 * with the SPL. If not, see <http://www.gnu.org/licenses/>.
23 *****************************************************************************
24 * Solaris Porting Layer (SPL) Proc Implementation.
25\*****************************************************************************/
715f6251 26
ae4c36ad
BB		 27#include <sys/systeminfo.h>
28#include <sys/kstat.h>
29#include <linux/kmod.h>
30#include <linux/seq_file.h>
31#include <linux/proc_compat.h>
55abb092 32#include <spl-debug.h>
57d1b188 33
b17edc10
BB		 34#ifdef SS_DEBUG_SUBSYS
35#undef SS_DEBUG_SUBSYS
57d1b188 36#endif
37
b17edc10 38#define SS_DEBUG_SUBSYS SS_PROC
57d1b188 39
404992e3 40#ifdef DEBUG_KMEM
57d1b188 41static unsigned long table_min = 0;
42static unsigned long table_max = ~0;
404992e3 43#endif
44
45#ifdef CONFIG_SYSCTL
46static struct ctl_table_header *spl_header = NULL;
c30df9c8 47#endif /* CONFIG_SYSCTL */
48
c30df9c8 49static struct proc_dir_entry *proc_spl = NULL;
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 */
c30df9c8 54struct proc_dir_entry *proc_spl_kstat = NULL;
57d1b188 55
79a3bf13 56#ifdef HAVE_CTL_NAME
57d86234 57#ifdef HAVE_CTL_UNNUMBERED
58
59#define CTL_SPL CTL_UNNUMBERED
60#define CTL_SPL_DEBUG CTL_UNNUMBERED
36b313da 61#define CTL_SPL_VM CTL_UNNUMBERED
57d86234 62#define CTL_SPL_MUTEX CTL_UNNUMBERED
63#define CTL_SPL_KMEM CTL_UNNUMBERED
64#define CTL_SPL_KSTAT CTL_UNNUMBERED
65
66#define CTL_VERSION CTL_UNNUMBERED /* Version */
67#define CTL_HOSTID CTL_UNNUMBERED /* Host id by /usr/bin/hostid */
68#define CTL_HW_SERIAL CTL_UNNUMBERED /* HW serial number by hostid */
d1ff2312 69#define CTL_KALLSYMS CTL_UNNUMBERED /* kallsyms_lookup_name addr */
57d86234 70
71#define CTL_DEBUG_SUBSYS CTL_UNNUMBERED /* Debug subsystem */
72#define CTL_DEBUG_MASK CTL_UNNUMBERED /* Debug mask */
73#define CTL_DEBUG_PRINTK CTL_UNNUMBERED /* All messages to console */
74#define CTL_DEBUG_MB CTL_UNNUMBERED /* Debug buffer size */
75#define CTL_DEBUG_BINARY CTL_UNNUMBERED /* Binary data in buffer */
76#define CTL_DEBUG_CATASTROPHE CTL_UNNUMBERED /* Set if BUG'd or panic'd */
77#define CTL_DEBUG_PANIC_ON_BUG CTL_UNNUMBERED /* Should panic on BUG */
78#define CTL_DEBUG_PATH CTL_UNNUMBERED /* Dump log location */
79#define CTL_DEBUG_DUMP CTL_UNNUMBERED /* Dump debug buffer to file */
80#define CTL_DEBUG_FORCE_BUG CTL_UNNUMBERED /* Hook to force a BUG */
81#define CTL_DEBUG_STACK_SIZE CTL_UNNUMBERED /* Max observed stack size */
82
83#define CTL_CONSOLE_RATELIMIT CTL_UNNUMBERED /* Ratelimit console messages */
84#define CTL_CONSOLE_MAX_DELAY_CS CTL_UNNUMBERED /* Max delay skip messages */
85#define CTL_CONSOLE_MIN_DELAY_CS CTL_UNNUMBERED /* Init delay skip messages */
86#define CTL_CONSOLE_BACKOFF CTL_UNNUMBERED /* Delay increase factor */
87
36b313da
BB		 88#define CTL_VM_MINFREE CTL_UNNUMBERED /* Minimum free memory */
89#define CTL_VM_DESFREE CTL_UNNUMBERED /* Desired free memory */
90#define CTL_VM_LOTSFREE CTL_UNNUMBERED /* Lots of free memory */
91#define CTL_VM_NEEDFREE CTL_UNNUMBERED /* Need free memory */
92#define CTL_VM_SWAPFS_MINFREE CTL_UNNUMBERED /* Minimum swapfs memory */
36b313da 93#define CTL_VM_SWAPFS_RESERVE CTL_UNNUMBERED /* Reserved swapfs memory */
4ab13d3b
BB		 94#define CTL_VM_AVAILRMEM CTL_UNNUMBERED /* Easily available memory */
95#define CTL_VM_FREEMEM CTL_UNNUMBERED /* Free memory */
96#define CTL_VM_PHYSMEM CTL_UNNUMBERED /* Total physical memory */
36b313da 97
57d86234 98#ifdef DEBUG_KMEM
99#define CTL_KMEM_KMEMUSED CTL_UNNUMBERED /* Alloc'd kmem bytes */
100#define CTL_KMEM_KMEMMAX CTL_UNNUMBERED /* Max alloc'd by kmem bytes */
101#define CTL_KMEM_VMEMUSED CTL_UNNUMBERED /* Alloc'd vmem bytes */
102#define CTL_KMEM_VMEMMAX CTL_UNNUMBERED /* Max alloc'd by vmem bytes */
103#define CTL_KMEM_ALLOC_FAILED CTL_UNNUMBERED /* Cache allocations failed */
104#endif
105
57d86234 106#else /* HAVE_CTL_UNNUMBERED */
107
36b313da
BB		 108enum {
109 CTL_SPL = 0x87,
110 CTL_SPL_DEBUG = 0x88,
111 CTL_SPL_VM = 0x89,
112 CTL_SPL_MUTEX = 0x90,
113 CTL_SPL_KMEM = 0x91,
114 CTL_SPL_KSTAT = 0x92,
115};
9ab1ac14 116
57d1b188 117enum {
36b313da
BB		 118 CTL_VERSION = 1, /* Version */
119 CTL_HOSTID, /* Host id reported by /usr/bin/hostid */
120 CTL_HW_SERIAL, /* Hardware serial number from hostid */
d1ff2312 121 CTL_KALLSYMS, /* Address of kallsyms_lookup_name */
36b313da
BB		 122
123 CTL_DEBUG_SUBSYS, /* Debug subsystem */
124 CTL_DEBUG_MASK, /* Debug mask */
125 CTL_DEBUG_PRINTK, /* Force all messages to console */
126 CTL_DEBUG_MB, /* Debug buffer size */
127 CTL_DEBUG_BINARY, /* Include binary data in buffer */
128 CTL_DEBUG_CATASTROPHE, /* Set if we have BUG'd or panic'd */
129 CTL_DEBUG_PANIC_ON_BUG, /* Set if we should panic on BUG */
130 CTL_DEBUG_PATH, /* Dump log location */
131 CTL_DEBUG_DUMP, /* Dump debug buffer to file */
132 CTL_DEBUG_FORCE_BUG, /* Hook to force a BUG */
133 CTL_DEBUG_STACK_SIZE, /* Max observed stack size */
134
135 CTL_CONSOLE_RATELIMIT, /* Ratelimit console messages */
136 CTL_CONSOLE_MAX_DELAY_CS, /* Max delay which we skip messages */
137 CTL_CONSOLE_MIN_DELAY_CS, /* Init delay which we skip messages */
138 CTL_CONSOLE_BACKOFF, /* Delay increase factor */
139
140 CTL_VM_MINFREE, /* Minimum free memory threshold */
141 CTL_VM_DESFREE, /* Desired free memory threshold */
142 CTL_VM_LOTSFREE, /* Lots of free memory threshold */
143 CTL_VM_NEEDFREE, /* Need free memory deficit */
144 CTL_VM_SWAPFS_MINFREE, /* Minimum swapfs memory */
36b313da 145 CTL_VM_SWAPFS_RESERVE, /* Reserved swapfs memory */
4ab13d3b
BB		 146 CTL_VM_AVAILRMEM, /* Easily available memory */
147 CTL_VM_FREEMEM, /* Free memory */
148 CTL_VM_PHYSMEM, /* Total physical memory */
9ab1ac14 149
57d1b188 150#ifdef DEBUG_KMEM
36b313da
BB		 151 CTL_KMEM_KMEMUSED, /* Alloc'd kmem bytes */
152 CTL_KMEM_KMEMMAX, /* Max alloc'd by kmem bytes */
153 CTL_KMEM_VMEMUSED, /* Alloc'd vmem bytes */
154 CTL_KMEM_VMEMMAX, /* Max alloc'd by vmem bytes */
57d1b188 155#endif
57d1b188 156};
57d86234 157#endif /* HAVE_CTL_UNNUMBERED */
79a3bf13 158#endif /* HAVE_CTL_NAME */
57d1b188 159
160static int
161proc_copyin_string(char *kbuffer, int kbuffer_size,
162 const char *ubuffer, int ubuffer_size)
163{
164 int size;
165
166 if (ubuffer_size > kbuffer_size)
167 return -EOVERFLOW;
168
169 if (copy_from_user((void *)kbuffer, (void *)ubuffer, ubuffer_size))
170 return -EFAULT;
171
172 /* strip trailing whitespace */
173 size = strnlen(kbuffer, ubuffer_size);
174 while (size-- >= 0)
175 if (!isspace(kbuffer[size]))
176 break;
177
178 /* empty string */
179 if (size < 0)
180 return -EINVAL;
181
182 /* no space to terminate */
183 if (size == kbuffer_size)
184 return -EOVERFLOW;
185
186 kbuffer[size + 1] = 0;
187 return 0;
188}
189
190static int
191proc_copyout_string(char *ubuffer, int ubuffer_size,
192 const char *kbuffer, char *append)
193{
194 /* NB if 'append' != NULL, it's a single character to append to the
195 * copied out string - usually "\n", for /proc entries and
196 * (i.e. a terminating zero byte) for sysctl entries
197 */
198 int size = MIN(strlen(kbuffer), ubuffer_size);
199
200 if (copy_to_user(ubuffer, kbuffer, size))
201 return -EFAULT;
202
203 if (append != NULL && size < ubuffer_size) {
204 if (copy_to_user(ubuffer + size, append, 1))
205 return -EFAULT;
206
207 size++;
208 }
209
210 return size;
211}
212
3977f837 213SPL_PROC_HANDLER(proc_dobitmasks)
57d1b188 214{
215 unsigned long *mask = table->data;
216 int is_subsys = (mask == &spl_debug_subsys) ? 1 : 0;
217 int is_printk = (mask == &spl_debug_printk) ? 1 : 0;
218 int size = 512, rc;
219 char *str;
b17edc10 220 SENTRY;
57d1b188 221
222 str = kmem_alloc(size, KM_SLEEP);
223 if (str == NULL)
b17edc10 224 SRETURN(-ENOMEM);
57d1b188 225
226 if (write) {
227 rc = proc_copyin_string(str, size, buffer, *lenp);
228 if (rc < 0)
b17edc10 229 SRETURN(rc);
57d1b188 230
231 rc = spl_debug_str2mask(mask, str, is_subsys);
232 /* Always print BUG/ASSERT to console, so keep this mask */
233 if (is_printk)
b17edc10 234 *mask |= SD_EMERG;
57d1b188 235
236 *ppos += *lenp;
237 } else {
238 rc = spl_debug_mask2str(str, size, *mask, is_subsys);
239 if (*ppos >= rc)
240 rc = 0;
241 else
242 rc = proc_copyout_string(buffer, *lenp,
243 str + *ppos, "\n");
244 if (rc >= 0) {
245 *lenp = rc;
246 *ppos += rc;
247 }
248 }
249
250 kmem_free(str, size);
b17edc10 251 SRETURN(rc);
57d1b188 252}
253
3977f837 254SPL_PROC_HANDLER(proc_debug_mb)
57d1b188 255{
256 char str[32];
257 int rc, len;
b17edc10 258 SENTRY;
57d1b188 259
260 if (write) {
261 rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
262 if (rc < 0)
b17edc10 263 SRETURN(rc);
57d1b188 264
265 rc = spl_debug_set_mb(simple_strtoul(str, NULL, 0));
266 *ppos += *lenp;
267 } else {
268 len = snprintf(str, sizeof(str), "%d", spl_debug_get_mb());
269 if (*ppos >= len)
270 rc = 0;
271 else
3977f837 272 rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
57d1b188 273
274 if (rc >= 0) {
275 *lenp = rc;
276 *ppos += rc;
277 }
278 }
279
b17edc10 280 SRETURN(rc);
57d1b188 281}
282
3977f837 283SPL_PROC_HANDLER(proc_dump_kernel)
57d1b188 284{
b17edc10 285 SENTRY;
57d1b188 286
287 if (write) {
7fea96c0 288 spl_debug_dumplog(0);
57d1b188 289 *ppos += *lenp;
290 } else {
291 *lenp = 0;
292 }
293
b17edc10 294 SRETURN(0);
57d1b188 295}
296
3977f837 297SPL_PROC_HANDLER(proc_force_bug)
57d1b188 298{
b17edc10 299 SENTRY;
57d1b188 300
55abb092
BB		 301 if (write)
302 PANIC("Crashing due to forced panic\n");
303 else
57d1b188 304 *lenp = 0;
57d1b188 305
b17edc10 306 SRETURN(0);
57d1b188 307}
308
3977f837 309SPL_PROC_HANDLER(proc_console_max_delay_cs)
57d1b188 310{
311 int rc, max_delay_cs;
312 struct ctl_table dummy = *table;
313 long d;
b17edc10 314 SENTRY;
57d1b188 315
316 dummy.data = &max_delay_cs;
317 dummy.proc_handler = &proc_dointvec;
318
319 if (write) {
320 max_delay_cs = 0;
3977f837 321 rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
57d1b188 322 if (rc < 0)
b17edc10 323 SRETURN(rc);
57d1b188 324
325 if (max_delay_cs <= 0)
b17edc10 326 SRETURN(-EINVAL);
57d1b188 327
328 d = (max_delay_cs * HZ) / 100;
329 if (d == 0 || d < spl_console_min_delay)
b17edc10 330 SRETURN(-EINVAL);
57d1b188 331
332 spl_console_max_delay = d;
333 } else {
334 max_delay_cs = (spl_console_max_delay * 100) / HZ;
3977f837 335 rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
57d1b188 336 }
337
b17edc10 338 SRETURN(rc);
57d1b188 339}
340
3977f837 341SPL_PROC_HANDLER(proc_console_min_delay_cs)
57d1b188 342{
343 int rc, min_delay_cs;
344 struct ctl_table dummy = *table;
345 long d;
b17edc10 346 SENTRY;
57d1b188 347
348 dummy.data = &min_delay_cs;
349 dummy.proc_handler = &proc_dointvec;
350
351 if (write) {
352 min_delay_cs = 0;
3977f837 353 rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
57d1b188 354 if (rc < 0)
b17edc10 355 SRETURN(rc);
57d1b188 356
357 if (min_delay_cs <= 0)
b17edc10 358 SRETURN(-EINVAL);
57d1b188 359
360 d = (min_delay_cs * HZ) / 100;
361 if (d == 0 || d > spl_console_max_delay)
b17edc10 362 SRETURN(-EINVAL);
57d1b188 363
364 spl_console_min_delay = d;
365 } else {
366 min_delay_cs = (spl_console_min_delay * 100) / HZ;
3977f837 367 rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
57d1b188 368 }
369
b17edc10 370 SRETURN(rc);
57d1b188 371}
372
3977f837 373SPL_PROC_HANDLER(proc_console_backoff)
57d1b188 374{
375 int rc, backoff;
376 struct ctl_table dummy = *table;
b17edc10 377 SENTRY;
57d1b188 378
379 dummy.data = &backoff;
380 dummy.proc_handler = &proc_dointvec;
381
382 if (write) {
383 backoff = 0;
3977f837 384 rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
57d1b188 385 if (rc < 0)
b17edc10 386 SRETURN(rc);
57d1b188 387
388 if (backoff <= 0)
b17edc10 389 SRETURN(-EINVAL);
57d1b188 390
391 spl_console_backoff = backoff;
392 } else {
393 backoff = spl_console_backoff;
3977f837 394 rc = spl_proc_dointvec(&dummy,write,filp,buffer,lenp,ppos);
57d1b188 395 }
396
b17edc10 397 SRETURN(rc);
57d1b188 398}
399
c6dc93d6 400#ifdef DEBUG_KMEM
3977f837 401SPL_PROC_HANDLER(proc_domemused)
57d1b188 402{
403 int rc = 0;
404 unsigned long min = 0, max = ~0, val;
405 struct ctl_table dummy = *table;
b17edc10 406 SENTRY;
57d1b188 407
408 dummy.data = &val;
409 dummy.proc_handler = &proc_dointvec;
410 dummy.extra1 = &min;
411 dummy.extra2 = &max;
412
413 if (write) {
414 *ppos += *lenp;
415 } else {
d04c8a56 416# ifdef HAVE_ATOMIC64_T
550f1705 417 val = atomic64_read((atomic64_t *)table->data);
d04c8a56
BB		 418# else
419 val = atomic_read((atomic_t *)table->data);
420# endif /* HAVE_ATOMIC64_T */
3977f837
BB		 421 rc = spl_proc_doulongvec_minmax(&dummy, write, filp,
422 buffer, lenp, ppos);
57d1b188 423 }
424
b17edc10 425 SRETURN(rc);
57d1b188 426}
c6dc93d6 427#endif /* DEBUG_KMEM */
57d1b188 428
3977f837 429SPL_PROC_HANDLER(proc_dohostid)
57d1b188 430{
431 int len, rc = 0;
937879f1 432 int32_t val;
57d1b188 433 char *end, str[32];
b17edc10 434 SENTRY;
57d1b188 435
436 if (write) {
3977f837 437 /* We can't use spl_proc_doulongvec_minmax() in the write
a0b5ae8a
RC		 438 * case hear because hostid while a hex value has no
439 * leading 0x which confuses the helper function. */
57d1b188 440 rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
441 if (rc < 0)
b17edc10 442 SRETURN(rc);
57d1b188 443
937879f1 444 val = simple_strtol(str, &end, 16);
a0b5ae8a 445 if (str == end)
b17edc10 446 SRETURN(-EINVAL);
57d1b188 447
a0b5ae8a
RC		 448 spl_hostid = (long) val;
449 (void) snprintf(hw_serial, HW_HOSTID_LEN, "%u",
450 (val >= 0) ? val : -val);
451 hw_serial[HW_HOSTID_LEN - 1] = '\0';
57d1b188 452 *ppos += *lenp;
453 } else {
454 len = snprintf(str, sizeof(str), "%lx", spl_hostid);
455 if (*ppos >= len)
456 rc = 0;
457 else
3977f837 458 rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
57d1b188 459
460 if (rc >= 0) {
461 *lenp = rc;
462 *ppos += rc;
463 }
464 }
465
b17edc10 466 SRETURN(rc);
57d1b188 467}
468
d1ff2312 469#ifndef HAVE_KALLSYMS_LOOKUP_NAME
3977f837
BB		 470SPL_PROC_HANDLER(proc_dokallsyms_lookup_name)
471{
d1ff2312
BB		 472 int len, rc = 0;
473 char *end, str[32];
b17edc10 474 SENTRY;
d1ff2312
BB		 475
476 if (write) {
477 /* This may only be set once at module load time */
96dded38 478 if (spl_kallsyms_lookup_name_fn != SYMBOL_POISON)
b17edc10 479 SRETURN(-EEXIST);
d1ff2312 480
3977f837 481 /* We can't use spl_proc_doulongvec_minmax() in the write
d1ff2312
BB		 482 * case hear because the address while a hex value has no
483 * leading 0x which confuses the helper function. */
484 rc = proc_copyin_string(str, sizeof(str), buffer, *lenp);
485 if (rc < 0)
b17edc10 486 SRETURN(rc);
d1ff2312
BB		 487
488 spl_kallsyms_lookup_name_fn =
489 (kallsyms_lookup_name_t)simple_strtoul(str, &end, 16);
490 if (str == end)
b17edc10 491 SRETURN(-EINVAL);
d1ff2312
BB		 492
493 *ppos += *lenp;
494 } else {
495 len = snprintf(str, sizeof(str), "%lx",
496 (unsigned long)spl_kallsyms_lookup_name_fn);
497 if (*ppos >= len)
498 rc = 0;
499 else
500 rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
501
502 if (rc >= 0) {
503 *lenp = rc;
504 *ppos += rc;
505 }
506 }
507
b17edc10 508 SRETURN(rc);
d1ff2312
BB		 509}
510#endif /* HAVE_KALLSYMS_LOOKUP_NAME */
511
3977f837 512SPL_PROC_HANDLER(proc_doavailrmem)
4ab13d3b
BB		 513{
514 int len, rc = 0;
515 char str[32];
b17edc10 516 SENTRY;
4ab13d3b
BB		 517
518 if (write) {
519 *ppos += *lenp;
520 } else {
3977f837
BB		 521 len = snprintf(str, sizeof(str), "%lu",
522 (unsigned long)availrmem);
4ab13d3b
BB		 523 if (*ppos >= len)
524 rc = 0;
525 else
3977f837 526 rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
4ab13d3b
BB		 527
528 if (rc >= 0) {
529 *lenp = rc;
530 *ppos += rc;
531 }
532 }
533
b17edc10 534 SRETURN(rc);
4ab13d3b
BB		 535}
536
3977f837 537SPL_PROC_HANDLER(proc_dofreemem)
4ab13d3b
BB		 538{
539 int len, rc = 0;
540 char str[32];
b17edc10 541 SENTRY;
4ab13d3b
BB		 542
543 if (write) {
544 *ppos += *lenp;
545 } else {
546 len = snprintf(str, sizeof(str), "%lu", (unsigned long)freemem);
547 if (*ppos >= len)
548 rc = 0;
549 else
3977f837 550 rc = proc_copyout_string(buffer,*lenp,str+*ppos,"\n");
4ab13d3b
BB		 551
552 if (rc >= 0) {
553 *lenp = rc;
554 *ppos += rc;
555 }
556 }
557
b17edc10 558 SRETURN(rc);
4ab13d3b
BB		 559}
560
ff449ac4 561#ifdef DEBUG_KMEM
562static void
563slab_seq_show_headers(struct seq_file *f)
564{
242f539a
BB		 565 seq_printf(f, "%-36s %-6s - %s %s %s - %s %s %s - "
566 "%s %s %s - %s %s %s\n", "name", "flags",
567 "obj_size", "slab_objs", "slab_size",
568 "slab_fail", "slab_create", "slab_destroy",
569 "slab_total", "slab_alloc", "slab_max",
570 "obj_total", "obj_alloc", "obj_max");
ff449ac4 571}
572
573static int
574slab_seq_show(struct seq_file *f, void *p)
575{
242f539a 576 spl_kmem_cache_t *skc = p;
ff449ac4 577
242f539a 578 ASSERT(skc->skc_magic == SKC_MAGIC);
ff449ac4 579
242f539a 580 spin_lock(&skc->skc_lock);
ff449ac4 581 seq_printf(f, "%-36s ", skc->skc_name);
242f539a
BB		 582 seq_printf(f, "0x%04lx - %u %u %u - %lu %lu %lu - "
583 "%lu %lu %lu - %lu %lu %lu\n",
584 (long unsigned)skc->skc_flags,
585 (unsigned)skc->skc_obj_size,
586 (unsigned)skc->skc_slab_objs,
587 (unsigned)skc->skc_slab_size,
588 (long unsigned)skc->skc_slab_fail,
589 (long unsigned)skc->skc_slab_create,
590 (long unsigned)skc->skc_slab_destroy,
591 (long unsigned)skc->skc_slab_total,
592 (long unsigned)skc->skc_slab_alloc,
593 (long unsigned)skc->skc_slab_max,
594 (long unsigned)skc->skc_obj_total,
595 (long unsigned)skc->skc_obj_alloc,
596 (long unsigned)skc->skc_obj_max);
597
598 spin_unlock(&skc->skc_lock);
ff449ac4 599
600 return 0;
601}
602
603static void *
604slab_seq_start(struct seq_file *f, loff_t *pos)
605{
606 struct list_head *p;
607 loff_t n = *pos;
b17edc10 608 SENTRY;
ff449ac4 609
610 down_read(&spl_kmem_cache_sem);
611 if (!n)
612 slab_seq_show_headers(f);
613
614 p = spl_kmem_cache_list.next;
615 while (n--) {
616 p = p->next;
617 if (p == &spl_kmem_cache_list)
b17edc10 618 SRETURN(NULL);
ff449ac4 619 }
620
b17edc10 621 SRETURN(list_entry(p, spl_kmem_cache_t, skc_list));
ff449ac4 622}
623
624static void *
625slab_seq_next(struct seq_file *f, void *p, loff_t *pos)
626{
627 spl_kmem_cache_t *skc = p;
b17edc10 628 SENTRY;
ff449ac4 629
630 ++*pos;
b17edc10 631 SRETURN((skc->skc_list.next == &spl_kmem_cache_list) ?
3977f837 632 NULL : list_entry(skc->skc_list.next,spl_kmem_cache_t,skc_list));
ff449ac4 633}
634
635static void
636slab_seq_stop(struct seq_file *f, void *v)
637{
638 up_read(&spl_kmem_cache_sem);
639}
640
641static struct seq_operations slab_seq_ops = {
642 .show = slab_seq_show,
643 .start = slab_seq_start,
644 .next = slab_seq_next,
645 .stop = slab_seq_stop,
646};
647
648static int
649proc_slab_open(struct inode *inode, struct file *filp)
650{
651 return seq_open(filp, &slab_seq_ops);
652}
653
654static struct file_operations proc_slab_operations = {
655 .open = proc_slab_open,
656 .read = seq_read,
657 .llseek = seq_lseek,
658 .release = seq_release,
659};
660#endif /* DEBUG_KMEM */
661
9ab1ac14 662static struct ctl_table spl_debug_table[] = {
57d1b188 663 {
79a3bf13 664 CTL_NAME (CTL_DEBUG_SUBSYS)
9ab1ac14 665 .procname = "subsystem",
57d1b188 666 .data = &spl_debug_subsys,
667 .maxlen = sizeof(unsigned long),
668 .mode = 0644,
669 .proc_handler = &proc_dobitmasks
670 },
671 {
79a3bf13 672 CTL_NAME (CTL_DEBUG_MASK)
9ab1ac14 673 .procname = "mask",
57d1b188 674 .data = &spl_debug_mask,
675 .maxlen = sizeof(unsigned long),
676 .mode = 0644,
677 .proc_handler = &proc_dobitmasks
678 },
679 {
79a3bf13 680 CTL_NAME (CTL_DEBUG_PRINTK)
9ab1ac14 681 .procname = "printk",
57d1b188 682 .data = &spl_debug_printk,
683 .maxlen = sizeof(unsigned long),
684 .mode = 0644,
685 .proc_handler = &proc_dobitmasks
686 },
687 {
79a3bf13 688 CTL_NAME (CTL_DEBUG_MB)
9ab1ac14 689 .procname = "mb",
57d1b188 690 .mode = 0644,
691 .proc_handler = &proc_debug_mb,
692 },
693 {
79a3bf13 694 CTL_NAME (CTL_DEBUG_BINARY)
9ab1ac14 695 .procname = "binary",
57d1b188 696 .data = &spl_debug_binary,
697 .maxlen = sizeof(int),
698 .mode = 0644,
699 .proc_handler = &proc_dointvec,
700 },
701 {
79a3bf13 702 CTL_NAME (CTL_DEBUG_CATASTROPHE)
57d1b188 703 .procname = "catastrophe",
704 .data = &spl_debug_catastrophe,
705 .maxlen = sizeof(int),
706 .mode = 0444,
707 .proc_handler = &proc_dointvec,
708 },
709 {
79a3bf13 710 CTL_NAME (CTL_DEBUG_PANIC_ON_BUG)
57d1b188 711 .procname = "panic_on_bug",
712 .data = &spl_debug_panic_on_bug,
713 .maxlen = sizeof(int),
714 .mode = 0644,
715 .proc_handler = &proc_dointvec
716 },
717 {
79a3bf13 718 CTL_NAME (CTL_DEBUG_PATH)
9ab1ac14 719 .procname = "path",
57d1b188 720 .data = spl_debug_file_path,
721 .maxlen = sizeof(spl_debug_file_path),
722 .mode = 0644,
723 .proc_handler = &proc_dostring,
724 },
725 {
79a3bf13 726 CTL_NAME (CTL_DEBUG_DUMP)
9ab1ac14 727 .procname = "dump",
57d1b188 728 .mode = 0200,
729 .proc_handler = &proc_dump_kernel,
730 },
79a3bf13 731 { CTL_NAME (CTL_DEBUG_FORCE_BUG)
57d1b188 732 .procname = "force_bug",
733 .mode = 0200,
734 .proc_handler = &proc_force_bug,
735 },
736 {
79a3bf13 737 CTL_NAME (CTL_CONSOLE_RATELIMIT)
57d1b188 738 .procname = "console_ratelimit",
739 .data = &spl_console_ratelimit,
740 .maxlen = sizeof(int),
741 .mode = 0644,
742 .proc_handler = &proc_dointvec,
743 },
744 {
79a3bf13 745 CTL_NAME (CTL_CONSOLE_MAX_DELAY_CS)
57d1b188 746 .procname = "console_max_delay_centisecs",
747 .maxlen = sizeof(int),
748 .mode = 0644,
749 .proc_handler = &proc_console_max_delay_cs,
750 },
751 {
79a3bf13 752 CTL_NAME (CTL_CONSOLE_MIN_DELAY_CS)
57d1b188 753 .procname = "console_min_delay_centisecs",
754 .maxlen = sizeof(int),
755 .mode = 0644,
756 .proc_handler = &proc_console_min_delay_cs,
757 },
758 {
79a3bf13 759 CTL_NAME (CTL_CONSOLE_BACKOFF)
57d1b188 760 .procname = "console_backoff",
761 .maxlen = sizeof(int),
762 .mode = 0644,
763 .proc_handler = &proc_console_backoff,
764 },
765 {
79a3bf13 766 CTL_NAME (CTL_DEBUG_STACK_SIZE)
57d1b188 767 .procname = "stack_max",
768 .data = &spl_debug_stack,
769 .maxlen = sizeof(int),
770 .mode = 0444,
771 .proc_handler = &proc_dointvec,
772 },
9ab1ac14 773 {0},
774};
775
36b313da
BB		 776static struct ctl_table spl_vm_table[] = {
777 {
79a3bf13 778 CTL_NAME (CTL_VM_MINFREE)
36b313da
BB		 779 .procname = "minfree",
780 .data = &minfree,
781 .maxlen = sizeof(int),
782 .mode = 0644,
783 .proc_handler = &proc_dointvec,
784 },
785 {
79a3bf13 786 CTL_NAME (CTL_VM_DESFREE)
36b313da
BB		 787 .procname = "desfree",
788 .data = &desfree,
789 .maxlen = sizeof(int),
790 .mode = 0644,
791 .proc_handler = &proc_dointvec,
792 },
793 {
79a3bf13 794 CTL_NAME (CTL_VM_LOTSFREE)
36b313da
BB		 795 .procname = "lotsfree",
796 .data = &lotsfree,
797 .maxlen = sizeof(int),
798 .mode = 0644,
799 .proc_handler = &proc_dointvec,
800 },
801 {
79a3bf13 802 CTL_NAME (CTL_VM_NEEDFREE)
36b313da
BB		 803 .procname = "needfree",
804 .data = &needfree,
805 .maxlen = sizeof(int),
806 .mode = 0444,
807 .proc_handler = &proc_dointvec,
808 },
809 {
79a3bf13 810 CTL_NAME (CTL_VM_SWAPFS_MINFREE)
36b313da
BB		 811 .procname = "swapfs_minfree",
812 .data = &swapfs_minfree,
813 .maxlen = sizeof(int),
814 .mode = 0644,
815 .proc_handler = &proc_dointvec,
816 },
36b313da 817 {
79a3bf13 818 CTL_NAME (CTL_VM_SWAPFS_RESERVE)
36b313da
BB		 819 .procname = "swapfs_reserve",
820 .data = &swapfs_reserve,
821 .maxlen = sizeof(int),
822 .mode = 0644,
823 .proc_handler = &proc_dointvec,
824 },
825 {
79a3bf13 826 CTL_NAME (CTL_VM_AVAILRMEM)
36b313da 827 .procname = "availrmem",
4ab13d3b
BB		 828 .mode = 0444,
829 .proc_handler = &proc_doavailrmem,
830 },
831 {
79a3bf13 832 CTL_NAME (CTL_VM_FREEMEM)
4ab13d3b
BB		 833 .procname = "freemem",
834 .data = (void *)2,
835 .maxlen = sizeof(int),
836 .mode = 0444,
837 .proc_handler = &proc_dofreemem,
838 },
839 {
79a3bf13 840 CTL_NAME (CTL_VM_PHYSMEM)
4ab13d3b
BB		 841 .procname = "physmem",
842 .data = &physmem,
36b313da
BB		 843 .maxlen = sizeof(int),
844 .mode = 0444,
845 .proc_handler = &proc_dointvec,
846 },
847 {0},
848};
849
57d1b188 850#ifdef DEBUG_KMEM
9ab1ac14 851static struct ctl_table spl_kmem_table[] = {
57d1b188 852 {
79a3bf13 853 CTL_NAME (CTL_KMEM_KMEMUSED)
57d1b188 854 .procname = "kmem_used",
855 .data = &kmem_alloc_used,
d04c8a56 856# ifdef HAVE_ATOMIC64_T
57d1b188 857 .maxlen = sizeof(atomic64_t),
d04c8a56
BB		 858# else
859 .maxlen = sizeof(atomic_t),
860# endif /* HAVE_ATOMIC64_T */
57d1b188 861 .mode = 0444,
d04c8a56 862 .proc_handler = &proc_domemused,
57d1b188 863 },
864 {
79a3bf13 865 CTL_NAME (CTL_KMEM_KMEMMAX)
57d1b188 866 .procname = "kmem_max",
867 .data = &kmem_alloc_max,
868 .maxlen = sizeof(unsigned long),
869 .extra1 = &table_min,
870 .extra2 = &table_max,
871 .mode = 0444,
872 .proc_handler = &proc_doulongvec_minmax,
873 },
874 {
79a3bf13 875 CTL_NAME (CTL_KMEM_VMEMUSED)
57d1b188 876 .procname = "vmem_used",
877 .data = &vmem_alloc_used,
d04c8a56 878# ifdef HAVE_ATOMIC64_T
57d1b188 879 .maxlen = sizeof(atomic64_t),
d04c8a56
BB		 880# else
881 .maxlen = sizeof(atomic_t),
882# endif /* HAVE_ATOMIC64_T */
57d1b188 883 .mode = 0444,
d04c8a56 884 .proc_handler = &proc_domemused,
57d1b188 885 },
886 {
79a3bf13 887 CTL_NAME (CTL_KMEM_VMEMMAX)
57d1b188 888 .procname = "vmem_max",
889 .data = &vmem_alloc_max,
890 .maxlen = sizeof(unsigned long),
891 .extra1 = &table_min,
892 .extra2 = &table_max,
893 .mode = 0444,
894 .proc_handler = &proc_doulongvec_minmax,
895 },
9ab1ac14 896 {0},
897};
04a479f7 898#endif /* DEBUG_KMEM */
899
04a479f7 900static struct ctl_table spl_kstat_table[] = {
901 {0},
902};
9ab1ac14 903
904static struct ctl_table spl_table[] = {
905 /* NB No .strategy entries have been provided since
906 * sysctl(8) prefers to go via /proc for portability.
907 */
908 {
79a3bf13 909 CTL_NAME (CTL_VERSION)
9ab1ac14 910 .procname = "version",
911 .data = spl_version,
912 .maxlen = sizeof(spl_version),
913 .mode = 0444,
914 .proc_handler = &proc_dostring,
915 },
57d1b188 916 {
79a3bf13 917 CTL_NAME (CTL_HOSTID)
57d1b188 918 .procname = "hostid",
919 .data = &spl_hostid,
920 .maxlen = sizeof(unsigned long),
921 .mode = 0644,
922 .proc_handler = &proc_dohostid,
923 },
924 {
79a3bf13 925 CTL_NAME (CTL_HW_SERIAL)
57d1b188 926 .procname = "hw_serial",
937879f1 927 .data = hw_serial,
928 .maxlen = sizeof(hw_serial),
57d1b188 929 .mode = 0444,
930 .proc_handler = &proc_dostring,
931 },
d1ff2312
BB		 932#ifndef HAVE_KALLSYMS_LOOKUP_NAME
933 {
79a3bf13 934 CTL_NAME (CTL_KALLSYMS)
d1ff2312
BB		 935 .procname = "kallsyms_lookup_name",
936 .data = &spl_kallsyms_lookup_name_fn,
937 .maxlen = sizeof(unsigned long),
938 .mode = 0644,
939 .proc_handler = &proc_dokallsyms_lookup_name,
940 },
941#endif
9ab1ac14 942 {
79a3bf13 943 CTL_NAME (CTL_SPL_DEBUG)
9ab1ac14 944 .procname = "debug",
945 .mode = 0555,
946 .child = spl_debug_table,
947 },
36b313da 948 {
79a3bf13 949 CTL_NAME (CTL_SPL_VM)
36b313da
BB		 950 .procname = "vm",
951 .mode = 0555,
952 .child = spl_vm_table,
953 },
9ab1ac14 954#ifdef DEBUG_KMEM
955 {
79a3bf13 956 CTL_NAME (CTL_SPL_KMEM)
9ab1ac14 957 .procname = "kmem",
958 .mode = 0555,
959 .child = spl_kmem_table,
960 },
04a479f7 961#endif
04a479f7 962 {
79a3bf13 963 CTL_NAME (CTL_SPL_KSTAT)
04a479f7 964 .procname = "kstat",
965 .mode = 0555,
966 .child = spl_kstat_table,
967 },
57d1b188 968 { 0 },
969};
970
9ab1ac14 971static struct ctl_table spl_dir[] = {
57d1b188 972 {
79a3bf13 973 CTL_NAME (CTL_SPL)
57d1b188 974 .procname = "spl",
975 .mode = 0555,
976 .child = spl_table,
977 },
57d86234 978 { 0 }
979};
980
981static struct ctl_table spl_root[] = {
982 {
79a3bf13 983 CTL_NAME (CTL_KERN)
57d86234 984 .procname = "kernel",
985 .mode = 0555,
986 .child = spl_dir,
987 },
988 { 0 }
57d1b188 989};
990
404992e3 991static int
992proc_dir_entry_match(int len, const char *name, struct proc_dir_entry *de)
993{
994 if (de->namelen != len)
995 return 0;
996
997 return !memcmp(name, de->name, len);
998}
999
04a479f7 1000struct proc_dir_entry *
404992e3 1001proc_dir_entry_find(struct proc_dir_entry *root, const char *str)
1002{
1003 struct proc_dir_entry *de;
1004
1005 for (de = root->subdir; de; de = de->next)
1006 if (proc_dir_entry_match(strlen(str), str, de))
1007 return de;
1008
1009 return NULL;
1010}
1011
04a479f7 1012int
1013proc_dir_entries(struct proc_dir_entry *root)
1014{
1015 struct proc_dir_entry *de;
1016 int i = 0;
1017
1018 for (de = root->subdir; de; de = de->next)
1019 i++;
1020
1021 return i;
1022}
1023
57d1b188 1024int
1025proc_init(void)
1026{
404992e3 1027 int rc = 0;
b17edc10 1028 SENTRY;
57d1b188 1029
1030#ifdef CONFIG_SYSCTL
57d86234 1031 spl_header = spl_register_sysctl_table(spl_root, 0);
57d1b188 1032 if (spl_header == NULL)
b17edc10 1033 SRETURN(-EUNATCH);
c30df9c8 1034#endif /* CONFIG_SYSCTL */
9ab1ac14 1035
c30df9c8 1036 proc_spl = proc_mkdir("spl", NULL);
1037 if (proc_spl == NULL)
b17edc10 1038 SGOTO(out, rc = -EUNATCH);
404992e3 1039
04a479f7 1040#ifdef DEBUG_KMEM
c30df9c8 1041 proc_spl_kmem = proc_mkdir("kmem", proc_spl);
1042 if (proc_spl_kmem == NULL)
b17edc10 1043 SGOTO(out, rc = -EUNATCH);
ff449ac4 1044
1045 proc_spl_kmem_slab = create_proc_entry("slab", 0444, proc_spl_kmem);
1046 if (proc_spl_kmem_slab == NULL)
b17edc10 1047 SGOTO(out, rc = -EUNATCH);
ff449ac4 1048
1049 proc_spl_kmem_slab->proc_fops = &proc_slab_operations;
04a479f7 1050#endif /* DEBUG_KMEM */
1051
c30df9c8 1052 proc_spl_kstat = proc_mkdir("kstat", proc_spl);
1053 if (proc_spl_kstat == NULL)
b17edc10 1054 SGOTO(out, rc = -EUNATCH);
404992e3 1055out:
c30df9c8 1056 if (rc) {
1057 remove_proc_entry("kstat", proc_spl);
ff449ac4 1058#ifdef DEBUG_KMEM
1059 remove_proc_entry("slab", proc_spl_kmem);
c30df9c8 1060 remove_proc_entry("kmem", proc_spl);
055ffd98 1061#endif
a02118a8 1062 remove_proc_entry("spl", NULL);
c30df9c8 1063#ifdef CONFIG_SYSCTL
1064 spl_unregister_sysctl_table(spl_header);
404992e3 1065#endif /* CONFIG_SYSCTL */
c30df9c8 1066 }
c30df9c8 1067
b17edc10 1068 SRETURN(rc);
57d1b188 1069}
1070
1071void
1072proc_fini(void)
1073{
b17edc10 1074 SENTRY;
57d1b188 1075
c30df9c8 1076 remove_proc_entry("kstat", proc_spl);
ff449ac4 1077#ifdef DEBUG_KMEM
1078 remove_proc_entry("slab", proc_spl_kmem);
c30df9c8 1079 remove_proc_entry("kmem", proc_spl);
055ffd98 1080#endif
a02118a8 1081 remove_proc_entry("spl", NULL);
c30df9c8 1082
57d1b188 1083#ifdef CONFIG_SYSCTL
1084 ASSERT(spl_header != NULL);
57d86234 1085 spl_unregister_sysctl_table(spl_header);
c30df9c8 1086#endif /* CONFIG_SYSCTL */
1087
b17edc10 1088 SEXIT;
57d1b188 1089}
mirror of SPL module used by << 0.8.x ZFSOnLinux