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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 |
57d1b188 | 7 | * |
716154c5 | 8 | * This file is part of the SPL, Solaris Porting Layer. |
d956cfac | 9 | * For details, see <http://zfsonlinux.org/>. |
716154c5 BB |
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. | |
57d1b188 | 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. | |
57d1b188 | 20 | * |
715f6251 | 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) Debug Implementation. | |
25 | \*****************************************************************************/ | |
57d1b188 | 26 | |
27 | #include <linux/kmod.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/vmalloc.h> | |
30 | #include <linux/pagemap.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/ctype.h> | |
33 | #include <linux/kthread.h> | |
34 | #include <linux/hardirq.h> | |
35 | #include <linux/interrupt.h> | |
f6c81c5e | 36 | #include <linux/spinlock.h> |
ae4c36ad | 37 | #include <linux/proc_compat.h> |
f0ff89fc | 38 | #include <linux/file_compat.h> |
57d1b188 | 39 | #include <sys/sysmacros.h> |
55abb092 BB |
40 | #include <spl-debug.h> |
41 | #include <spl-trace.h> | |
57d1b188 | 42 | #include <spl-ctl.h> |
57d1b188 | 43 | |
b17edc10 BB |
44 | #ifdef SS_DEBUG_SUBSYS |
45 | #undef SS_DEBUG_SUBSYS | |
57d1b188 | 46 | #endif |
47 | ||
b17edc10 | 48 | #define SS_DEBUG_SUBSYS SS_DEBUG |
57d1b188 | 49 | |
4b2220f0 BB |
50 | /* Debug log support enabled */ |
51 | #ifdef DEBUG_LOG | |
52 | ||
57d1b188 | 53 | unsigned long spl_debug_subsys = ~0; |
54 | EXPORT_SYMBOL(spl_debug_subsys); | |
55abb092 | 55 | module_param(spl_debug_subsys, ulong, 0644); |
57d1b188 | 56 | MODULE_PARM_DESC(spl_debug_subsys, "Subsystem debugging level mask."); |
57 | ||
b17edc10 | 58 | unsigned long spl_debug_mask = SD_CANTMASK; |
57d1b188 | 59 | EXPORT_SYMBOL(spl_debug_mask); |
55abb092 | 60 | module_param(spl_debug_mask, ulong, 0644); |
57d1b188 | 61 | MODULE_PARM_DESC(spl_debug_mask, "Debugging level mask."); |
62 | ||
b17edc10 | 63 | unsigned long spl_debug_printk = SD_CANTMASK; |
57d1b188 | 64 | EXPORT_SYMBOL(spl_debug_printk); |
55abb092 | 65 | module_param(spl_debug_printk, ulong, 0644); |
57d1b188 | 66 | MODULE_PARM_DESC(spl_debug_printk, "Console printk level mask."); |
67 | ||
68 | int spl_debug_mb = -1; | |
69 | EXPORT_SYMBOL(spl_debug_mb); | |
70 | module_param(spl_debug_mb, int, 0644); | |
71 | MODULE_PARM_DESC(spl_debug_mb, "Total debug buffer size."); | |
72 | ||
73 | unsigned int spl_debug_binary = 1; | |
74 | EXPORT_SYMBOL(spl_debug_binary); | |
75 | ||
76 | unsigned int spl_debug_catastrophe; | |
77 | EXPORT_SYMBOL(spl_debug_catastrophe); | |
78 | ||
3626ae6a | 79 | unsigned int spl_debug_panic_on_bug = 0; |
57d1b188 | 80 | EXPORT_SYMBOL(spl_debug_panic_on_bug); |
55abb092 | 81 | module_param(spl_debug_panic_on_bug, uint, 0644); |
57d1b188 | 82 | MODULE_PARM_DESC(spl_debug_panic_on_bug, "Panic on BUG"); |
83 | ||
84 | static char spl_debug_file_name[PATH_MAX]; | |
627a7497 | 85 | char spl_debug_file_path[PATH_MAX] = "/tmp/spl-log"; |
57d1b188 | 86 | |
87 | unsigned int spl_console_ratelimit = 1; | |
88 | EXPORT_SYMBOL(spl_console_ratelimit); | |
89 | ||
90 | long spl_console_max_delay; | |
91 | EXPORT_SYMBOL(spl_console_max_delay); | |
92 | ||
93 | long spl_console_min_delay; | |
94 | EXPORT_SYMBOL(spl_console_min_delay); | |
95 | ||
96 | unsigned int spl_console_backoff = SPL_DEFAULT_BACKOFF; | |
97 | EXPORT_SYMBOL(spl_console_backoff); | |
98 | ||
99 | unsigned int spl_debug_stack; | |
100 | EXPORT_SYMBOL(spl_debug_stack); | |
101 | ||
102 | static int spl_panic_in_progress; | |
103 | ||
104 | union trace_data_union (*trace_data[TCD_TYPE_MAX])[NR_CPUS] __cacheline_aligned; | |
105 | char *trace_console_buffers[NR_CPUS][3]; | |
106 | struct rw_semaphore trace_sem; | |
107 | atomic_t trace_tage_allocated = ATOMIC_INIT(0); | |
108 | ||
7fea96c0 | 109 | static int spl_debug_dump_all_pages(dumplog_priv_t *dp, char *); |
57d1b188 | 110 | static void trace_fini(void); |
111 | ||
112 | ||
113 | /* Memory percentage breakdown by type */ | |
114 | static unsigned int pages_factor[TCD_TYPE_MAX] = { | |
115 | 80, /* 80% pages for TCD_TYPE_PROC */ | |
116 | 10, /* 10% pages for TCD_TYPE_SOFTIRQ */ | |
117 | 10 /* 10% pages for TCD_TYPE_IRQ */ | |
118 | }; | |
119 | ||
57d1b188 | 120 | const char * |
121 | spl_debug_subsys2str(int subsys) | |
122 | { | |
123 | switch (subsys) { | |
124 | default: | |
125 | return NULL; | |
b17edc10 | 126 | case SS_UNDEFINED: |
57d1b188 | 127 | return "undefined"; |
b17edc10 | 128 | case SS_ATOMIC: |
57d1b188 | 129 | return "atomic"; |
b17edc10 | 130 | case SS_KOBJ: |
57d1b188 | 131 | return "kobj"; |
b17edc10 | 132 | case SS_VNODE: |
57d1b188 | 133 | return "vnode"; |
b17edc10 | 134 | case SS_TIME: |
57d1b188 | 135 | return "time"; |
b17edc10 | 136 | case SS_RWLOCK: |
57d1b188 | 137 | return "rwlock"; |
b17edc10 | 138 | case SS_THREAD: |
57d1b188 | 139 | return "thread"; |
b17edc10 | 140 | case SS_CONDVAR: |
57d1b188 | 141 | return "condvar"; |
b17edc10 | 142 | case SS_MUTEX: |
57d1b188 | 143 | return "mutex"; |
b17edc10 | 144 | case SS_RNG: |
57d1b188 | 145 | return "rng"; |
b17edc10 | 146 | case SS_TASKQ: |
57d1b188 | 147 | return "taskq"; |
b17edc10 | 148 | case SS_KMEM: |
57d1b188 | 149 | return "kmem"; |
b17edc10 | 150 | case SS_DEBUG: |
e5bbd245 | 151 | return "debug"; |
b17edc10 | 152 | case SS_GENERIC: |
e5bbd245 | 153 | return "generic"; |
b17edc10 | 154 | case SS_PROC: |
e5bbd245 | 155 | return "proc"; |
b17edc10 | 156 | case SS_MODULE: |
e5bbd245 | 157 | return "module"; |
b17edc10 | 158 | case SS_CRED: |
ec7d53e9 | 159 | return "cred"; |
b17edc10 BB |
160 | case SS_KSTAT: |
161 | return "kstat"; | |
162 | case SS_XDR: | |
163 | return "xdr"; | |
9fe45dc1 BB |
164 | case SS_TSD: |
165 | return "tsd"; | |
5c1967eb BB |
166 | case SS_ZLIB: |
167 | return "zlib"; | |
b17edc10 BB |
168 | case SS_USER1: |
169 | return "user1"; | |
170 | case SS_USER2: | |
171 | return "user2"; | |
172 | case SS_USER3: | |
173 | return "user3"; | |
174 | case SS_USER4: | |
175 | return "user4"; | |
176 | case SS_USER5: | |
177 | return "user5"; | |
178 | case SS_USER6: | |
179 | return "user6"; | |
180 | case SS_USER7: | |
181 | return "user7"; | |
182 | case SS_USER8: | |
183 | return "user8"; | |
57d1b188 | 184 | } |
185 | } | |
186 | ||
187 | const char * | |
188 | spl_debug_dbg2str(int debug) | |
189 | { | |
190 | switch (debug) { | |
191 | default: | |
192 | return NULL; | |
b17edc10 | 193 | case SD_TRACE: |
57d1b188 | 194 | return "trace"; |
b17edc10 | 195 | case SD_INFO: |
57d1b188 | 196 | return "info"; |
b17edc10 | 197 | case SD_WARNING: |
57d1b188 | 198 | return "warning"; |
b17edc10 | 199 | case SD_ERROR: |
57d1b188 | 200 | return "error"; |
b17edc10 | 201 | case SD_EMERG: |
57d1b188 | 202 | return "emerg"; |
b17edc10 | 203 | case SD_CONSOLE: |
57d1b188 | 204 | return "console"; |
b17edc10 | 205 | case SD_IOCTL: |
57d1b188 | 206 | return "ioctl"; |
b17edc10 | 207 | case SD_DPRINTF: |
57d1b188 | 208 | return "dprintf"; |
b17edc10 | 209 | case SD_OTHER: |
57d1b188 | 210 | return "other"; |
211 | } | |
212 | } | |
213 | ||
214 | int | |
215 | spl_debug_mask2str(char *str, int size, unsigned long mask, int is_subsys) | |
216 | { | |
217 | const char *(*fn)(int bit) = is_subsys ? spl_debug_subsys2str : | |
218 | spl_debug_dbg2str; | |
219 | const char *token; | |
220 | int i, bit, len = 0; | |
221 | ||
222 | if (mask == 0) { /* "0" */ | |
223 | if (size > 0) | |
224 | str[0] = '0'; | |
225 | len = 1; | |
226 | } else { /* space-separated tokens */ | |
227 | for (i = 0; i < 32; i++) { | |
228 | bit = 1 << i; | |
229 | ||
230 | if ((mask & bit) == 0) | |
231 | continue; | |
232 | ||
233 | token = fn(bit); | |
234 | if (token == NULL) /* unused bit */ | |
235 | continue; | |
236 | ||
237 | if (len > 0) { /* separator? */ | |
238 | if (len < size) | |
239 | str[len] = ' '; | |
240 | len++; | |
241 | } | |
242 | ||
243 | while (*token != 0) { | |
244 | if (len < size) | |
245 | str[len] = *token; | |
246 | token++; | |
247 | len++; | |
248 | } | |
249 | } | |
250 | } | |
251 | ||
252 | /* terminate 'str' */ | |
253 | if (len < size) | |
254 | str[len] = 0; | |
255 | else | |
256 | str[size - 1] = 0; | |
257 | ||
258 | return len; | |
259 | } | |
260 | ||
261 | static int | |
262 | spl_debug_token2mask(int *mask, const char *str, int len, int is_subsys) | |
263 | { | |
264 | const char *(*fn)(int bit) = is_subsys ? spl_debug_subsys2str : | |
265 | spl_debug_dbg2str; | |
266 | const char *token; | |
267 | int i, j, bit; | |
268 | ||
269 | /* match against known tokens */ | |
270 | for (i = 0; i < 32; i++) { | |
271 | bit = 1 << i; | |
272 | ||
273 | token = fn(bit); | |
274 | if (token == NULL) /* unused? */ | |
275 | continue; | |
276 | ||
277 | /* strcasecmp */ | |
278 | for (j = 0; ; j++) { | |
279 | if (j == len) { /* end of token */ | |
280 | if (token[j] == 0) { | |
281 | *mask = bit; | |
282 | return 0; | |
283 | } | |
284 | break; | |
285 | } | |
286 | ||
287 | if (token[j] == 0) | |
288 | break; | |
289 | ||
290 | if (str[j] == token[j]) | |
291 | continue; | |
292 | ||
293 | if (str[j] < 'A' || 'Z' < str[j]) | |
294 | break; | |
295 | ||
296 | if (str[j] - 'A' + 'a' != token[j]) | |
297 | break; | |
298 | } | |
299 | } | |
300 | ||
301 | return -EINVAL; /* no match */ | |
302 | } | |
303 | ||
304 | int | |
305 | spl_debug_str2mask(unsigned long *mask, const char *str, int is_subsys) | |
306 | { | |
307 | char op = 0; | |
308 | int m = 0, matched, n, t; | |
309 | ||
310 | /* Allow a number for backwards compatibility */ | |
311 | for (n = strlen(str); n > 0; n--) | |
312 | if (!isspace(str[n-1])) | |
313 | break; | |
314 | matched = n; | |
315 | ||
316 | if ((t = sscanf(str, "%i%n", &m, &matched)) >= 1 && matched == n) { | |
317 | *mask = m; | |
318 | return 0; | |
319 | } | |
320 | ||
321 | /* <str> must be a list of debug tokens or numbers separated by | |
322 | * whitespace and optionally an operator ('+' or '-'). If an operator | |
323 | * appears first in <str>, '*mask' is used as the starting point | |
324 | * (relative), otherwise 0 is used (absolute). An operator applies to | |
325 | * all following tokens up to the next operator. */ | |
326 | matched = 0; | |
327 | while (*str != 0) { | |
328 | while (isspace(*str)) /* skip whitespace */ | |
329 | str++; | |
330 | ||
331 | if (*str == 0) | |
332 | break; | |
333 | ||
334 | if (*str == '+' || *str == '-') { | |
335 | op = *str++; | |
336 | ||
337 | /* op on first token == relative */ | |
338 | if (!matched) | |
339 | m = *mask; | |
340 | ||
341 | while (isspace(*str)) /* skip whitespace */ | |
342 | str++; | |
343 | ||
344 | if (*str == 0) /* trailing op */ | |
345 | return -EINVAL; | |
346 | } | |
347 | ||
348 | /* find token length */ | |
349 | for (n = 0; str[n] != 0 && !isspace(str[n]); n++); | |
350 | ||
351 | /* match token */ | |
352 | if (spl_debug_token2mask(&t, str, n, is_subsys) != 0) | |
353 | return -EINVAL; | |
354 | ||
355 | matched = 1; | |
356 | if (op == '-') | |
357 | m &= ~t; | |
358 | else | |
359 | m |= t; | |
360 | ||
361 | str += n; | |
362 | } | |
363 | ||
364 | if (!matched) | |
365 | return -EINVAL; | |
366 | ||
367 | *mask = m; | |
368 | return 0; | |
369 | } | |
370 | ||
57d1b188 | 371 | static void |
372 | spl_debug_dumplog_internal(dumplog_priv_t *dp) | |
373 | { | |
374 | void *journal_info; | |
375 | ||
376 | journal_info = current->journal_info; | |
377 | current->journal_info = NULL; | |
378 | ||
379 | snprintf(spl_debug_file_name, sizeof(spl_debug_file_path) - 1, | |
380 | "%s.%ld.%ld", spl_debug_file_path, | |
381 | get_seconds(), (long)dp->dp_pid); | |
627a7497 | 382 | printk("SPL: Dumping log to %s\n", spl_debug_file_name); |
7fea96c0 | 383 | spl_debug_dump_all_pages(dp, spl_debug_file_name); |
57d1b188 | 384 | |
385 | current->journal_info = journal_info; | |
386 | } | |
387 | ||
388 | static int | |
389 | spl_debug_dumplog_thread(void *arg) | |
390 | { | |
391 | dumplog_priv_t *dp = (dumplog_priv_t *)arg; | |
392 | ||
393 | spl_debug_dumplog_internal(dp); | |
7fea96c0 | 394 | atomic_set(&dp->dp_done, 1); |
57d1b188 | 395 | wake_up(&dp->dp_waitq); |
3d061e9d | 396 | complete_and_exit(NULL, 0); |
57d1b188 | 397 | |
398 | return 0; /* Unreachable */ | |
399 | } | |
400 | ||
7fea96c0 | 401 | /* When flag is set do not use a new thread for the debug dump */ |
57d1b188 | 402 | int |
7fea96c0 | 403 | spl_debug_dumplog(int flags) |
57d1b188 | 404 | { |
405 | struct task_struct *tsk; | |
406 | dumplog_priv_t dp; | |
57d1b188 | 407 | |
7fea96c0 | 408 | init_waitqueue_head(&dp.dp_waitq); |
409 | dp.dp_pid = current->pid; | |
410 | dp.dp_flags = flags; | |
411 | atomic_set(&dp.dp_done, 0); | |
57d1b188 | 412 | |
7fea96c0 | 413 | if (dp.dp_flags & DL_NOTHREAD) { |
414 | spl_debug_dumplog_internal(&dp); | |
415 | } else { | |
57d1b188 | 416 | |
7fea96c0 | 417 | tsk = kthread_create(spl_debug_dumplog_thread,(void *)&dp,"spl_debug"); |
418 | if (tsk == NULL) | |
419 | return -ENOMEM; | |
420 | ||
421 | wake_up_process(tsk); | |
422 | wait_event(dp.dp_waitq, atomic_read(&dp.dp_done)); | |
423 | } | |
57d1b188 | 424 | |
a8ac0b89 | 425 | return 0; |
57d1b188 | 426 | } |
427 | EXPORT_SYMBOL(spl_debug_dumplog); | |
428 | ||
429 | static char * | |
430 | trace_get_console_buffer(void) | |
431 | { | |
432 | int cpu = get_cpu(); | |
433 | int idx; | |
434 | ||
435 | if (in_irq()) { | |
436 | idx = 0; | |
437 | } else if (in_softirq()) { | |
438 | idx = 1; | |
439 | } else { | |
440 | idx = 2; | |
441 | } | |
442 | ||
443 | return trace_console_buffers[cpu][idx]; | |
444 | } | |
445 | ||
446 | static void | |
447 | trace_put_console_buffer(char *buffer) | |
448 | { | |
449 | put_cpu(); | |
450 | } | |
451 | ||
f6c81c5e | 452 | static int |
453 | trace_lock_tcd(struct trace_cpu_data *tcd) | |
57d1b188 | 454 | { |
f6c81c5e | 455 | __ASSERT(tcd->tcd_type < TCD_TYPE_MAX); |
57d1b188 | 456 | |
f6c81c5e | 457 | spin_lock_irqsave(&tcd->tcd_lock, tcd->tcd_lock_flags); |
57d1b188 | 458 | |
f6c81c5e | 459 | return 1; |
57d1b188 | 460 | } |
461 | ||
462 | static void | |
f6c81c5e | 463 | trace_unlock_tcd(struct trace_cpu_data *tcd) |
57d1b188 | 464 | { |
f6c81c5e | 465 | __ASSERT(tcd->tcd_type < TCD_TYPE_MAX); |
466 | ||
467 | spin_unlock_irqrestore(&tcd->tcd_lock, tcd->tcd_lock_flags); | |
57d1b188 | 468 | } |
469 | ||
f6c81c5e | 470 | static struct trace_cpu_data * |
471 | trace_get_tcd(void) | |
57d1b188 | 472 | { |
f6c81c5e | 473 | int cpu; |
474 | struct trace_cpu_data *tcd; | |
475 | ||
476 | cpu = get_cpu(); | |
477 | if (in_irq()) | |
478 | tcd = &(*trace_data[TCD_TYPE_IRQ])[cpu].tcd; | |
479 | else if (in_softirq()) | |
480 | tcd = &(*trace_data[TCD_TYPE_SOFTIRQ])[cpu].tcd; | |
481 | else | |
482 | tcd = &(*trace_data[TCD_TYPE_PROC])[cpu].tcd; | |
57d1b188 | 483 | |
f6c81c5e | 484 | trace_lock_tcd(tcd); |
57d1b188 | 485 | |
f6c81c5e | 486 | return tcd; |
57d1b188 | 487 | } |
488 | ||
489 | static void | |
f6c81c5e | 490 | trace_put_tcd (struct trace_cpu_data *tcd) |
57d1b188 | 491 | { |
f6c81c5e | 492 | trace_unlock_tcd(tcd); |
57d1b188 | 493 | |
f6c81c5e | 494 | put_cpu(); |
57d1b188 | 495 | } |
496 | ||
497 | static void | |
498 | trace_set_debug_header(struct spl_debug_header *header, int subsys, | |
499 | int mask, const int line, unsigned long stack) | |
500 | { | |
501 | struct timeval tv; | |
502 | ||
503 | do_gettimeofday(&tv); | |
504 | ||
505 | header->ph_subsys = subsys; | |
506 | header->ph_mask = mask; | |
507 | header->ph_cpu_id = smp_processor_id(); | |
508 | header->ph_sec = (__u32)tv.tv_sec; | |
509 | header->ph_usec = tv.tv_usec; | |
510 | header->ph_stack = stack; | |
511 | header->ph_pid = current->pid; | |
512 | header->ph_line_num = line; | |
513 | ||
514 | return; | |
515 | } | |
516 | ||
517 | static void | |
518 | trace_print_to_console(struct spl_debug_header *hdr, int mask, const char *buf, | |
519 | int len, const char *file, const char *fn) | |
520 | { | |
521 | char *prefix = "SPL", *ptype = NULL; | |
522 | ||
b17edc10 | 523 | if ((mask & SD_EMERG) != 0) { |
57d1b188 | 524 | prefix = "SPLError"; |
525 | ptype = KERN_EMERG; | |
b17edc10 | 526 | } else if ((mask & SD_ERROR) != 0) { |
57d1b188 | 527 | prefix = "SPLError"; |
528 | ptype = KERN_ERR; | |
b17edc10 | 529 | } else if ((mask & SD_WARNING) != 0) { |
57d1b188 | 530 | prefix = "SPL"; |
531 | ptype = KERN_WARNING; | |
b17edc10 | 532 | } else if ((mask & (SD_CONSOLE | spl_debug_printk)) != 0) { |
57d1b188 | 533 | prefix = "SPL"; |
534 | ptype = KERN_INFO; | |
535 | } | |
536 | ||
b17edc10 | 537 | if ((mask & SD_CONSOLE) != 0) { |
57d1b188 | 538 | printk("%s%s: %.*s", ptype, prefix, len, buf); |
539 | } else { | |
892d5106 | 540 | printk("%s%s: %d:%d:(%s:%d:%s()) %.*s", ptype, prefix, |
541 | hdr->ph_pid, hdr->ph_stack, file, | |
542 | hdr->ph_line_num, fn, len, buf); | |
57d1b188 | 543 | } |
544 | ||
545 | return; | |
546 | } | |
547 | ||
548 | static int | |
549 | trace_max_debug_mb(void) | |
550 | { | |
551 | return MAX(512, ((num_physpages >> (20 - PAGE_SHIFT)) * 80) / 100); | |
552 | } | |
553 | ||
57d1b188 | 554 | static struct trace_page * |
555 | tage_alloc(int gfp) | |
556 | { | |
557 | struct page *page; | |
558 | struct trace_page *tage; | |
559 | ||
560 | page = alloc_pages(gfp | __GFP_NOWARN, 0); | |
561 | if (page == NULL) | |
562 | return NULL; | |
563 | ||
564 | tage = kmalloc(sizeof(*tage), gfp); | |
565 | if (tage == NULL) { | |
566 | __free_pages(page, 0); | |
567 | return NULL; | |
568 | } | |
569 | ||
570 | tage->page = page; | |
571 | atomic_inc(&trace_tage_allocated); | |
572 | ||
573 | return tage; | |
574 | } | |
575 | ||
576 | static void | |
577 | tage_free(struct trace_page *tage) | |
578 | { | |
579 | __ASSERT(tage != NULL); | |
580 | __ASSERT(tage->page != NULL); | |
581 | ||
582 | __free_pages(tage->page, 0); | |
583 | kfree(tage); | |
584 | atomic_dec(&trace_tage_allocated); | |
585 | } | |
586 | ||
587 | static struct trace_page * | |
588 | tage_from_list(struct list_head *list) | |
589 | { | |
590 | return list_entry(list, struct trace_page, linkage); | |
591 | } | |
592 | ||
593 | static void | |
594 | tage_to_tail(struct trace_page *tage, struct list_head *queue) | |
595 | { | |
596 | __ASSERT(tage != NULL); | |
597 | __ASSERT(queue != NULL); | |
598 | ||
599 | list_move_tail(&tage->linkage, queue); | |
600 | } | |
601 | ||
602 | /* try to return a page that has 'len' bytes left at the end */ | |
603 | static struct trace_page * | |
604 | trace_get_tage_try(struct trace_cpu_data *tcd, unsigned long len) | |
605 | { | |
606 | struct trace_page *tage; | |
607 | ||
608 | if (tcd->tcd_cur_pages > 0) { | |
609 | __ASSERT(!list_empty(&tcd->tcd_pages)); | |
610 | tage = tage_from_list(tcd->tcd_pages.prev); | |
611 | if (tage->used + len <= PAGE_SIZE) | |
612 | return tage; | |
613 | } | |
614 | ||
615 | if (tcd->tcd_cur_pages < tcd->tcd_max_pages) { | |
616 | if (tcd->tcd_cur_stock_pages > 0) { | |
617 | tage = tage_from_list(tcd->tcd_stock_pages.prev); | |
618 | tcd->tcd_cur_stock_pages--; | |
619 | list_del_init(&tage->linkage); | |
620 | } else { | |
621 | tage = tage_alloc(GFP_ATOMIC); | |
622 | if (tage == NULL) { | |
623 | printk(KERN_WARNING | |
624 | "failure to allocate a tage (%ld)\n", | |
625 | tcd->tcd_cur_pages); | |
626 | return NULL; | |
627 | } | |
628 | } | |
629 | ||
630 | tage->used = 0; | |
631 | tage->cpu = smp_processor_id(); | |
632 | tage->type = tcd->tcd_type; | |
633 | list_add_tail(&tage->linkage, &tcd->tcd_pages); | |
634 | tcd->tcd_cur_pages++; | |
635 | ||
636 | return tage; | |
637 | } | |
638 | ||
639 | return NULL; | |
640 | } | |
641 | ||
642 | /* return a page that has 'len' bytes left at the end */ | |
643 | static struct trace_page * | |
644 | trace_get_tage(struct trace_cpu_data *tcd, unsigned long len) | |
645 | { | |
646 | struct trace_page *tage; | |
647 | ||
648 | __ASSERT(len <= PAGE_SIZE); | |
649 | ||
650 | tage = trace_get_tage_try(tcd, len); | |
651 | if (tage) | |
652 | return tage; | |
653 | ||
654 | if (tcd->tcd_cur_pages > 0) { | |
655 | tage = tage_from_list(tcd->tcd_pages.next); | |
656 | tage->used = 0; | |
657 | tage_to_tail(tage, &tcd->tcd_pages); | |
658 | } | |
659 | ||
660 | return tage; | |
661 | } | |
662 | ||
663 | int | |
55abb092 BB |
664 | spl_debug_msg(void *arg, int subsys, int mask, const char *file, |
665 | const char *fn, const int line, const char *format, ...) | |
57d1b188 | 666 | { |
55abb092 | 667 | spl_debug_limit_state_t *cdls = arg; |
57d1b188 | 668 | struct trace_cpu_data *tcd = NULL; |
b02e9b24 | 669 | struct spl_debug_header header = { 0, }; |
57d1b188 | 670 | struct trace_page *tage; |
671 | /* string_buf is used only if tcd != NULL, and is always set then */ | |
672 | char *string_buf = NULL; | |
673 | char *debug_buf; | |
674 | int known_size; | |
675 | int needed = 85; /* average message length */ | |
676 | int max_nob; | |
677 | va_list ap; | |
678 | int i; | |
57d1b188 | 679 | |
55abb092 | 680 | if (subsys == 0) |
b17edc10 | 681 | subsys = SS_DEBUG_SUBSYS; |
55abb092 BB |
682 | |
683 | if (mask == 0) | |
b17edc10 | 684 | mask = SD_EMERG; |
55abb092 | 685 | |
57d1b188 | 686 | if (strchr(file, '/')) |
687 | file = strrchr(file, '/') + 1; | |
688 | ||
57d1b188 | 689 | tcd = trace_get_tcd(); |
9baf44bc | 690 | trace_set_debug_header(&header, subsys, mask, line, 0); |
57d1b188 | 691 | if (tcd == NULL) |
692 | goto console; | |
693 | ||
694 | if (tcd->tcd_shutting_down) { | |
695 | trace_put_tcd(tcd); | |
696 | tcd = NULL; | |
697 | goto console; | |
698 | } | |
699 | ||
700 | known_size = strlen(file) + 1; | |
701 | if (fn) | |
702 | known_size += strlen(fn) + 1; | |
703 | ||
704 | if (spl_debug_binary) | |
705 | known_size += sizeof(header); | |
706 | ||
707 | /* '2' used because vsnprintf returns real size required for output | |
708 | * _without_ terminating NULL. */ | |
709 | for (i = 0; i < 2; i++) { | |
710 | tage = trace_get_tage(tcd, needed + known_size + 1); | |
711 | if (tage == NULL) { | |
712 | if (needed + known_size > PAGE_SIZE) | |
b17edc10 | 713 | mask |= SD_ERROR; |
57d1b188 | 714 | |
715 | trace_put_tcd(tcd); | |
716 | tcd = NULL; | |
717 | goto console; | |
718 | } | |
719 | ||
720 | string_buf = (char *)page_address(tage->page) + | |
721 | tage->used + known_size; | |
722 | ||
723 | max_nob = PAGE_SIZE - tage->used - known_size; | |
724 | if (max_nob <= 0) { | |
725 | printk(KERN_EMERG "negative max_nob: %i\n", max_nob); | |
b17edc10 | 726 | mask |= SD_ERROR; |
57d1b188 | 727 | trace_put_tcd(tcd); |
728 | tcd = NULL; | |
729 | goto console; | |
730 | } | |
731 | ||
732 | needed = 0; | |
55abb092 | 733 | if (format) { |
55abb092 | 734 | va_start(ap, format); |
8b0eb3f0 | 735 | needed += vsnprintf(string_buf, max_nob, format, ap); |
57d1b188 | 736 | va_end(ap); |
737 | } | |
738 | ||
739 | if (needed < max_nob) | |
740 | break; | |
741 | } | |
742 | ||
57d1b188 | 743 | header.ph_len = known_size + needed; |
744 | debug_buf = (char *)page_address(tage->page) + tage->used; | |
745 | ||
746 | if (spl_debug_binary) { | |
747 | memcpy(debug_buf, &header, sizeof(header)); | |
748 | tage->used += sizeof(header); | |
749 | debug_buf += sizeof(header); | |
750 | } | |
751 | ||
752 | strcpy(debug_buf, file); | |
753 | tage->used += strlen(file) + 1; | |
754 | debug_buf += strlen(file) + 1; | |
755 | ||
756 | if (fn) { | |
757 | strcpy(debug_buf, fn); | |
758 | tage->used += strlen(fn) + 1; | |
759 | debug_buf += strlen(fn) + 1; | |
760 | } | |
761 | ||
762 | __ASSERT(debug_buf == string_buf); | |
763 | ||
764 | tage->used += needed; | |
765 | __ASSERT (tage->used <= PAGE_SIZE); | |
766 | ||
767 | console: | |
768 | if ((mask & spl_debug_printk) == 0) { | |
769 | /* no console output requested */ | |
770 | if (tcd != NULL) | |
771 | trace_put_tcd(tcd); | |
772 | return 1; | |
773 | } | |
774 | ||
775 | if (cdls != NULL) { | |
776 | if (spl_console_ratelimit && cdls->cdls_next != 0 && | |
777 | !time_before(cdls->cdls_next, jiffies)) { | |
778 | /* skipping a console message */ | |
779 | cdls->cdls_count++; | |
780 | if (tcd != NULL) | |
781 | trace_put_tcd(tcd); | |
782 | return 1; | |
783 | } | |
784 | ||
785 | if (time_before(cdls->cdls_next + spl_console_max_delay + | |
786 | (10 * HZ), jiffies)) { | |
787 | /* last timeout was a long time ago */ | |
788 | cdls->cdls_delay /= spl_console_backoff * 4; | |
789 | } else { | |
790 | cdls->cdls_delay *= spl_console_backoff; | |
791 | ||
792 | if (cdls->cdls_delay < spl_console_min_delay) | |
793 | cdls->cdls_delay = spl_console_min_delay; | |
794 | else if (cdls->cdls_delay > spl_console_max_delay) | |
795 | cdls->cdls_delay = spl_console_max_delay; | |
796 | } | |
797 | ||
798 | /* ensure cdls_next is never zero after it's been seen */ | |
799 | cdls->cdls_next = (jiffies + cdls->cdls_delay) | 1; | |
800 | } | |
801 | ||
802 | if (tcd != NULL) { | |
803 | trace_print_to_console(&header, mask, string_buf, needed, file, fn); | |
804 | trace_put_tcd(tcd); | |
805 | } else { | |
806 | string_buf = trace_get_console_buffer(); | |
807 | ||
808 | needed = 0; | |
55abb092 | 809 | if (format != NULL) { |
8b0eb3f0 BB |
810 | va_start(ap, format); |
811 | needed += vsnprintf(string_buf, | |
812 | TRACE_CONSOLE_BUFFER_SIZE, format, ap); | |
813 | va_end(ap); | |
57d1b188 | 814 | } |
815 | trace_print_to_console(&header, mask, | |
816 | string_buf, needed, file, fn); | |
817 | ||
818 | trace_put_console_buffer(string_buf); | |
819 | } | |
820 | ||
821 | if (cdls != NULL && cdls->cdls_count != 0) { | |
822 | string_buf = trace_get_console_buffer(); | |
823 | ||
824 | needed = snprintf(string_buf, TRACE_CONSOLE_BUFFER_SIZE, | |
825 | "Skipped %d previous similar message%s\n", | |
826 | cdls->cdls_count, (cdls->cdls_count > 1) ? "s" : ""); | |
827 | ||
828 | trace_print_to_console(&header, mask, | |
829 | string_buf, needed, file, fn); | |
830 | ||
831 | trace_put_console_buffer(string_buf); | |
832 | cdls->cdls_count = 0; | |
833 | } | |
834 | ||
835 | return 0; | |
836 | } | |
55abb092 | 837 | EXPORT_SYMBOL(spl_debug_msg); |
57d1b188 | 838 | |
839 | /* Do the collect_pages job on a single CPU: assumes that all other | |
840 | * CPUs have been stopped during a panic. If this isn't true for | |
841 | * some arch, this will have to be implemented separately in each arch. | |
842 | */ | |
843 | static void | |
7fea96c0 | 844 | collect_pages_from_single_cpu(struct page_collection *pc) |
57d1b188 | 845 | { |
846 | struct trace_cpu_data *tcd; | |
847 | int i, j; | |
848 | ||
849 | tcd_for_each(tcd, i, j) { | |
850 | list_splice_init(&tcd->tcd_pages, &pc->pc_pages); | |
851 | tcd->tcd_cur_pages = 0; | |
852 | } | |
853 | } | |
854 | ||
855 | static void | |
f6c81c5e | 856 | collect_pages_on_all_cpus(struct page_collection *pc) |
57d1b188 | 857 | { |
858 | struct trace_cpu_data *tcd; | |
f6c81c5e | 859 | int i, cpu; |
57d1b188 | 860 | |
861 | spin_lock(&pc->pc_lock); | |
f6c81c5e | 862 | for_each_possible_cpu(cpu) { |
863 | tcd_for_each_type_lock(tcd, i, cpu) { | |
864 | list_splice_init(&tcd->tcd_pages, &pc->pc_pages); | |
865 | tcd->tcd_cur_pages = 0; | |
866 | } | |
57d1b188 | 867 | } |
868 | spin_unlock(&pc->pc_lock); | |
869 | } | |
870 | ||
871 | static void | |
7fea96c0 | 872 | collect_pages(dumplog_priv_t *dp, struct page_collection *pc) |
57d1b188 | 873 | { |
874 | INIT_LIST_HEAD(&pc->pc_pages); | |
875 | ||
7fea96c0 | 876 | if (spl_panic_in_progress || dp->dp_flags & DL_SINGLE_CPU) |
877 | collect_pages_from_single_cpu(pc); | |
57d1b188 | 878 | else |
f6c81c5e | 879 | collect_pages_on_all_cpus(pc); |
57d1b188 | 880 | } |
881 | ||
882 | static void | |
f6c81c5e | 883 | put_pages_back_on_all_cpus(struct page_collection *pc) |
57d1b188 | 884 | { |
57d1b188 | 885 | struct trace_cpu_data *tcd; |
886 | struct list_head *cur_head; | |
887 | struct trace_page *tage; | |
888 | struct trace_page *tmp; | |
f6c81c5e | 889 | int i, cpu; |
57d1b188 | 890 | |
891 | spin_lock(&pc->pc_lock); | |
57d1b188 | 892 | |
f6c81c5e | 893 | for_each_possible_cpu(cpu) { |
894 | tcd_for_each_type_lock(tcd, i, cpu) { | |
895 | cur_head = tcd->tcd_pages.next; | |
57d1b188 | 896 | |
f6c81c5e | 897 | list_for_each_entry_safe(tage, tmp, &pc->pc_pages, |
898 | linkage) { | |
f6c81c5e | 899 | if (tage->cpu != cpu || tage->type != i) |
900 | continue; | |
57d1b188 | 901 | |
f6c81c5e | 902 | tage_to_tail(tage, cur_head); |
903 | tcd->tcd_cur_pages++; | |
904 | } | |
57d1b188 | 905 | } |
906 | } | |
f6c81c5e | 907 | |
57d1b188 | 908 | spin_unlock(&pc->pc_lock); |
909 | } | |
910 | ||
911 | static void | |
912 | put_pages_back(struct page_collection *pc) | |
913 | { | |
914 | if (!spl_panic_in_progress) | |
f6c81c5e | 915 | put_pages_back_on_all_cpus(pc); |
57d1b188 | 916 | } |
917 | ||
57d1b188 | 918 | static int |
7fea96c0 | 919 | spl_debug_dump_all_pages(dumplog_priv_t *dp, char *filename) |
57d1b188 | 920 | { |
921 | struct page_collection pc; | |
922 | struct file *filp; | |
923 | struct trace_page *tage; | |
924 | struct trace_page *tmp; | |
925 | mm_segment_t oldfs; | |
926 | int rc = 0; | |
927 | ||
928 | down_write(&trace_sem); | |
929 | ||
f0ff89fc | 930 | filp = spl_filp_open(filename, O_CREAT|O_EXCL|O_WRONLY|O_LARGEFILE, |
57d1b188 | 931 | 0600, &rc); |
932 | if (filp == NULL) { | |
933 | if (rc != -EEXIST) | |
934 | printk(KERN_ERR "SPL: Can't open %s for dump: %d\n", | |
935 | filename, rc); | |
936 | goto out; | |
937 | } | |
938 | ||
939 | spin_lock_init(&pc.pc_lock); | |
7fea96c0 | 940 | collect_pages(dp, &pc); |
57d1b188 | 941 | if (list_empty(&pc.pc_pages)) { |
942 | rc = 0; | |
943 | goto close; | |
944 | } | |
945 | ||
946 | oldfs = get_fs(); | |
947 | set_fs(get_ds()); | |
948 | ||
949 | list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) { | |
f0ff89fc BB |
950 | rc = spl_filp_write(filp, page_address(tage->page), |
951 | tage->used, spl_filp_poff(filp)); | |
57d1b188 | 952 | if (rc != (int)tage->used) { |
953 | printk(KERN_WARNING "SPL: Wanted to write %u " | |
954 | "but wrote %d\n", tage->used, rc); | |
955 | put_pages_back(&pc); | |
956 | __ASSERT(list_empty(&pc.pc_pages)); | |
957 | break; | |
958 | } | |
959 | list_del(&tage->linkage); | |
960 | tage_free(tage); | |
961 | } | |
962 | ||
963 | set_fs(oldfs); | |
964 | ||
f0ff89fc | 965 | rc = spl_filp_fsync(filp, 1); |
57d1b188 | 966 | if (rc) |
967 | printk(KERN_ERR "SPL: Unable to sync: %d\n", rc); | |
968 | close: | |
f0ff89fc | 969 | spl_filp_close(filp); |
57d1b188 | 970 | out: |
971 | up_write(&trace_sem); | |
972 | ||
973 | return rc; | |
974 | } | |
975 | ||
976 | static void | |
977 | spl_debug_flush_pages(void) | |
978 | { | |
7fea96c0 | 979 | dumplog_priv_t dp; |
57d1b188 | 980 | struct page_collection pc; |
981 | struct trace_page *tage; | |
982 | struct trace_page *tmp; | |
983 | ||
984 | spin_lock_init(&pc.pc_lock); | |
7fea96c0 | 985 | init_waitqueue_head(&dp.dp_waitq); |
986 | dp.dp_pid = current->pid; | |
987 | dp.dp_flags = 0; | |
988 | atomic_set(&dp.dp_done, 0); | |
57d1b188 | 989 | |
7fea96c0 | 990 | collect_pages(&dp, &pc); |
57d1b188 | 991 | list_for_each_entry_safe(tage, tmp, &pc.pc_pages, linkage) { |
57d1b188 | 992 | list_del(&tage->linkage); |
993 | tage_free(tage); | |
994 | } | |
995 | } | |
996 | ||
997 | unsigned long | |
998 | spl_debug_set_mask(unsigned long mask) { | |
999 | spl_debug_mask = mask; | |
1000 | return 0; | |
1001 | } | |
1002 | EXPORT_SYMBOL(spl_debug_set_mask); | |
1003 | ||
1004 | unsigned long | |
1005 | spl_debug_get_mask(void) { | |
1006 | return spl_debug_mask; | |
1007 | } | |
1008 | EXPORT_SYMBOL(spl_debug_get_mask); | |
1009 | ||
1010 | unsigned long | |
1011 | spl_debug_set_subsys(unsigned long subsys) { | |
1012 | spl_debug_subsys = subsys; | |
1013 | return 0; | |
1014 | } | |
1015 | EXPORT_SYMBOL(spl_debug_set_subsys); | |
1016 | ||
1017 | unsigned long | |
1018 | spl_debug_get_subsys(void) { | |
1019 | return spl_debug_subsys; | |
1020 | } | |
1021 | EXPORT_SYMBOL(spl_debug_get_subsys); | |
1022 | ||
1023 | int | |
1024 | spl_debug_set_mb(int mb) | |
1025 | { | |
1026 | int i, j, pages; | |
1027 | int limit = trace_max_debug_mb(); | |
1028 | struct trace_cpu_data *tcd; | |
1029 | ||
1030 | if (mb < num_possible_cpus()) { | |
1031 | printk(KERN_ERR "SPL: Refusing to set debug buffer size to " | |
1032 | "%dMB - lower limit is %d\n", mb, num_possible_cpus()); | |
1033 | return -EINVAL; | |
1034 | } | |
1035 | ||
1036 | if (mb > limit) { | |
1037 | printk(KERN_ERR "SPL: Refusing to set debug buffer size to " | |
1038 | "%dMB - upper limit is %d\n", mb, limit); | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | ||
1042 | mb /= num_possible_cpus(); | |
1043 | pages = mb << (20 - PAGE_SHIFT); | |
1044 | ||
1045 | down_write(&trace_sem); | |
1046 | ||
1047 | tcd_for_each(tcd, i, j) | |
1048 | tcd->tcd_max_pages = (pages * tcd->tcd_pages_factor) / 100; | |
1049 | ||
1050 | up_write(&trace_sem); | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | EXPORT_SYMBOL(spl_debug_set_mb); | |
1055 | ||
1056 | int | |
1057 | spl_debug_get_mb(void) | |
1058 | { | |
1059 | int i, j; | |
1060 | struct trace_cpu_data *tcd; | |
1061 | int total_pages = 0; | |
1062 | ||
1063 | down_read(&trace_sem); | |
1064 | ||
1065 | tcd_for_each(tcd, i, j) | |
1066 | total_pages += tcd->tcd_max_pages; | |
1067 | ||
1068 | up_read(&trace_sem); | |
1069 | ||
1070 | return (total_pages >> (20 - PAGE_SHIFT)) + 1; | |
1071 | } | |
1072 | EXPORT_SYMBOL(spl_debug_get_mb); | |
1073 | ||
1074 | void spl_debug_dumpstack(struct task_struct *tsk) | |
1075 | { | |
1076 | extern void show_task(struct task_struct *); | |
1077 | ||
1078 | if (tsk == NULL) | |
1079 | tsk = current; | |
1080 | ||
627a7497 | 1081 | printk("SPL: Showing stack for process %d\n", tsk->pid); |
57d86234 | 1082 | dump_stack(); |
57d1b188 | 1083 | } |
1084 | EXPORT_SYMBOL(spl_debug_dumpstack); | |
1085 | ||
7fea96c0 | 1086 | void spl_debug_bug(char *file, const char *func, const int line, int flags) |
57d1b188 | 1087 | { |
1088 | spl_debug_catastrophe = 1; | |
b17edc10 | 1089 | spl_debug_msg(NULL, 0, SD_EMERG, file, func, line, "SPL PANIC\n"); |
57d1b188 | 1090 | |
55abb092 BB |
1091 | if (in_interrupt()) |
1092 | panic("SPL PANIC in interrupt.\n"); | |
57d1b188 | 1093 | |
97f8f6d7 BB |
1094 | if (in_atomic() || irqs_disabled()) |
1095 | flags |= DL_NOTHREAD; | |
1096 | ||
57d1b188 | 1097 | /* Ensure all debug pages and dumped by current cpu */ |
1098 | if (spl_debug_panic_on_bug) | |
1099 | spl_panic_in_progress = 1; | |
1100 | ||
1101 | spl_debug_dumpstack(NULL); | |
57d1b188 | 1102 | |
d956cfac AX |
1103 | if (spl_debug_panic_on_bug) { |
1104 | spl_debug_dumplog(flags); | |
55abb092 | 1105 | panic("SPL PANIC"); |
d956cfac | 1106 | } |
57d1b188 | 1107 | |
1108 | set_task_state(current, TASK_UNINTERRUPTIBLE); | |
1109 | while (1) | |
1110 | schedule(); | |
1111 | } | |
1112 | EXPORT_SYMBOL(spl_debug_bug); | |
1113 | ||
1114 | int | |
1115 | spl_debug_clear_buffer(void) | |
1116 | { | |
1117 | spl_debug_flush_pages(); | |
1118 | return 0; | |
1119 | } | |
1120 | EXPORT_SYMBOL(spl_debug_clear_buffer); | |
1121 | ||
1122 | int | |
1123 | spl_debug_mark_buffer(char *text) | |
1124 | { | |
b17edc10 BB |
1125 | SDEBUG(SD_WARNING, "*************************************\n"); |
1126 | SDEBUG(SD_WARNING, "DEBUG MARKER: %s\n", text); | |
1127 | SDEBUG(SD_WARNING, "*************************************\n"); | |
57d1b188 | 1128 | |
1129 | return 0; | |
1130 | } | |
1131 | EXPORT_SYMBOL(spl_debug_mark_buffer); | |
1132 | ||
57d1b188 | 1133 | static int |
1134 | trace_init(int max_pages) | |
1135 | { | |
1136 | struct trace_cpu_data *tcd; | |
1137 | int i, j; | |
1138 | ||
1139 | init_rwsem(&trace_sem); | |
1140 | ||
1141 | /* initialize trace_data */ | |
1142 | memset(trace_data, 0, sizeof(trace_data)); | |
1143 | for (i = 0; i < TCD_TYPE_MAX; i++) { | |
1144 | trace_data[i] = kmalloc(sizeof(union trace_data_union) * | |
1145 | NR_CPUS, GFP_KERNEL); | |
1146 | if (trace_data[i] == NULL) | |
1147 | goto out; | |
1148 | } | |
1149 | ||
1150 | tcd_for_each(tcd, i, j) { | |
f6c81c5e | 1151 | spin_lock_init(&tcd->tcd_lock); |
57d1b188 | 1152 | tcd->tcd_pages_factor = pages_factor[i]; |
1153 | tcd->tcd_type = i; | |
1154 | tcd->tcd_cpu = j; | |
1155 | INIT_LIST_HEAD(&tcd->tcd_pages); | |
1156 | INIT_LIST_HEAD(&tcd->tcd_stock_pages); | |
1157 | tcd->tcd_cur_pages = 0; | |
1158 | tcd->tcd_cur_stock_pages = 0; | |
1159 | tcd->tcd_max_pages = (max_pages * pages_factor[i]) / 100; | |
1160 | tcd->tcd_shutting_down = 0; | |
1161 | } | |
1162 | ||
1163 | for (i = 0; i < num_possible_cpus(); i++) { | |
1164 | for (j = 0; j < 3; j++) { | |
1165 | trace_console_buffers[i][j] = | |
1166 | kmalloc(TRACE_CONSOLE_BUFFER_SIZE, | |
1167 | GFP_KERNEL); | |
1168 | ||
1169 | if (trace_console_buffers[i][j] == NULL) | |
1170 | goto out; | |
1171 | } | |
1172 | } | |
1173 | ||
1174 | return 0; | |
1175 | out: | |
1176 | trace_fini(); | |
1177 | printk(KERN_ERR "SPL: Insufficient memory for debug logs\n"); | |
1178 | return -ENOMEM; | |
1179 | } | |
1180 | ||
1181 | int | |
1114ae6a | 1182 | spl_debug_init(void) |
57d1b188 | 1183 | { |
1184 | int rc, max = spl_debug_mb; | |
1185 | ||
1186 | spl_console_max_delay = SPL_DEFAULT_MAX_DELAY; | |
1187 | spl_console_min_delay = SPL_DEFAULT_MIN_DELAY; | |
1188 | ||
1189 | /* If spl_debug_mb is set to an invalid value or uninitialized | |
1190 | * then just make the total buffers smp_num_cpus TCD_MAX_PAGES */ | |
1191 | if (max > (num_physpages >> (20 - 2 - PAGE_SHIFT)) / 5 || | |
1192 | max >= 512 || max < 0) { | |
1193 | max = TCD_MAX_PAGES; | |
1194 | } else { | |
1195 | max = (max / num_online_cpus()) << (20 - PAGE_SHIFT); | |
1196 | } | |
1197 | ||
1198 | rc = trace_init(max); | |
1199 | if (rc) | |
1200 | return rc; | |
1201 | ||
d50bd9e2 | 1202 | return rc; |
57d1b188 | 1203 | } |
1204 | ||
1205 | static void | |
f6c81c5e | 1206 | trace_cleanup_on_all_cpus(void) |
57d1b188 | 1207 | { |
1208 | struct trace_cpu_data *tcd; | |
1209 | struct trace_page *tage; | |
1210 | struct trace_page *tmp; | |
f6c81c5e | 1211 | int i, cpu; |
57d1b188 | 1212 | |
f6c81c5e | 1213 | for_each_possible_cpu(cpu) { |
1214 | tcd_for_each_type_lock(tcd, i, cpu) { | |
1215 | tcd->tcd_shutting_down = 1; | |
57d1b188 | 1216 | |
f6c81c5e | 1217 | list_for_each_entry_safe(tage, tmp, &tcd->tcd_pages, |
1218 | linkage) { | |
f6c81c5e | 1219 | list_del(&tage->linkage); |
1220 | tage_free(tage); | |
1221 | } | |
1222 | tcd->tcd_cur_pages = 0; | |
57d1b188 | 1223 | } |
57d1b188 | 1224 | } |
1225 | } | |
1226 | ||
1227 | static void | |
1228 | trace_fini(void) | |
1229 | { | |
1230 | int i, j; | |
1231 | ||
f6c81c5e | 1232 | trace_cleanup_on_all_cpus(); |
57d1b188 | 1233 | |
1234 | for (i = 0; i < num_possible_cpus(); i++) { | |
1235 | for (j = 0; j < 3; j++) { | |
1236 | if (trace_console_buffers[i][j] != NULL) { | |
1237 | kfree(trace_console_buffers[i][j]); | |
1238 | trace_console_buffers[i][j] = NULL; | |
1239 | } | |
1240 | } | |
1241 | } | |
1242 | ||
124ca8a5 | 1243 | for (i = 0; i < TCD_TYPE_MAX && trace_data[i] != NULL; i++) { |
57d1b188 | 1244 | kfree(trace_data[i]); |
1245 | trace_data[i] = NULL; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | void | |
1114ae6a | 1250 | spl_debug_fini(void) |
57d1b188 | 1251 | { |
57d1b188 | 1252 | trace_fini(); |
57d1b188 | 1253 | } |
4b2220f0 BB |
1254 | |
1255 | #endif /* DEBUG_LOG */ |