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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 BB |
6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 | 8 | * This file is part of the SPL, Solaris Porting Layer. |
3d6af2dd | 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. | |
715f6251 | 15 | * |
716154c5 | 16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT |
715f6251 BB |
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) Kstat Implementation. | |
25 | \*****************************************************************************/ | |
715f6251 | 26 | |
ae4c36ad | 27 | #include <linux/seq_file.h> |
55abb092 | 28 | #include <sys/kstat.h> |
e5b9b344 | 29 | #include <sys/vmem.h> |
cd478018 | 30 | #include <sys/cmn_err.h> |
04a479f7 | 31 | |
1ddf9722 YS |
32 | #ifndef HAVE_PDE_DATA |
33 | #define PDE_DATA(x) (PDE(x)->data) | |
34 | #endif | |
b17edc10 | 35 | |
f2a745c4 RY |
36 | static kmutex_t kstat_module_lock; |
37 | static struct list_head kstat_module_list; | |
04a479f7 BB |
38 | static kid_t kstat_id; |
39 | ||
56d40a68 PS |
40 | static int |
41 | kstat_resize_raw(kstat_t *ksp) | |
42 | { | |
43 | if (ksp->ks_raw_bufsize == KSTAT_RAW_MAX) | |
44 | return ENOMEM; | |
45 | ||
46 | vmem_free(ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
47 | ksp->ks_raw_bufsize = MIN(ksp->ks_raw_bufsize * 2, KSTAT_RAW_MAX); | |
48 | ksp->ks_raw_buf = vmem_alloc(ksp->ks_raw_bufsize, KM_SLEEP); | |
49 | ||
50 | return 0; | |
51 | } | |
52 | ||
f483a97a NB |
53 | void |
54 | kstat_waitq_enter(kstat_io_t *kiop) | |
55 | { | |
56 | hrtime_t new, delta; | |
57 | ulong_t wcnt; | |
58 | ||
59 | new = gethrtime(); | |
60 | delta = new - kiop->wlastupdate; | |
61 | kiop->wlastupdate = new; | |
62 | wcnt = kiop->wcnt++; | |
63 | if (wcnt != 0) { | |
64 | kiop->wlentime += delta * wcnt; | |
65 | kiop->wtime += delta; | |
66 | } | |
67 | } | |
68 | EXPORT_SYMBOL(kstat_waitq_enter); | |
69 | ||
70 | void | |
71 | kstat_waitq_exit(kstat_io_t *kiop) | |
72 | { | |
73 | hrtime_t new, delta; | |
74 | ulong_t wcnt; | |
75 | ||
76 | new = gethrtime(); | |
77 | delta = new - kiop->wlastupdate; | |
78 | kiop->wlastupdate = new; | |
79 | wcnt = kiop->wcnt--; | |
80 | ASSERT((int)wcnt > 0); | |
81 | kiop->wlentime += delta * wcnt; | |
82 | kiop->wtime += delta; | |
83 | } | |
84 | EXPORT_SYMBOL(kstat_waitq_exit); | |
85 | ||
86 | void | |
87 | kstat_runq_enter(kstat_io_t *kiop) | |
88 | { | |
89 | hrtime_t new, delta; | |
90 | ulong_t rcnt; | |
91 | ||
92 | new = gethrtime(); | |
93 | delta = new - kiop->rlastupdate; | |
94 | kiop->rlastupdate = new; | |
95 | rcnt = kiop->rcnt++; | |
96 | if (rcnt != 0) { | |
97 | kiop->rlentime += delta * rcnt; | |
98 | kiop->rtime += delta; | |
99 | } | |
100 | } | |
101 | EXPORT_SYMBOL(kstat_runq_enter); | |
102 | ||
103 | void | |
104 | kstat_runq_exit(kstat_io_t *kiop) | |
105 | { | |
106 | hrtime_t new, delta; | |
107 | ulong_t rcnt; | |
108 | ||
109 | new = gethrtime(); | |
110 | delta = new - kiop->rlastupdate; | |
111 | kiop->rlastupdate = new; | |
112 | rcnt = kiop->rcnt--; | |
113 | ASSERT((int)rcnt > 0); | |
114 | kiop->rlentime += delta * rcnt; | |
115 | kiop->rtime += delta; | |
116 | } | |
117 | EXPORT_SYMBOL(kstat_runq_exit); | |
118 | ||
56d40a68 | 119 | static int |
04a479f7 BB |
120 | kstat_seq_show_headers(struct seq_file *f) |
121 | { | |
122 | kstat_t *ksp = (kstat_t *)f->private; | |
56d40a68 PS |
123 | int rc = 0; |
124 | ||
04a479f7 BB |
125 | ASSERT(ksp->ks_magic == KS_MAGIC); |
126 | ||
127 | seq_printf(f, "%d %d 0x%02x %d %d %lld %lld\n", | |
128 | ksp->ks_kid, ksp->ks_type, ksp->ks_flags, | |
129 | ksp->ks_ndata, (int)ksp->ks_data_size, | |
130 | ksp->ks_crtime, ksp->ks_snaptime); | |
131 | ||
132 | switch (ksp->ks_type) { | |
133 | case KSTAT_TYPE_RAW: | |
56d40a68 PS |
134 | restart: |
135 | if (ksp->ks_raw_ops.headers) { | |
136 | rc = ksp->ks_raw_ops.headers( | |
137 | ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
138 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) | |
139 | goto restart; | |
140 | if (!rc) | |
141 | seq_puts(f, ksp->ks_raw_buf); | |
142 | } else { | |
143 | seq_printf(f, "raw data\n"); | |
144 | } | |
04a479f7 BB |
145 | break; |
146 | case KSTAT_TYPE_NAMED: | |
147 | seq_printf(f, "%-31s %-4s %s\n", | |
148 | "name", "type", "data"); | |
149 | break; | |
150 | case KSTAT_TYPE_INTR: | |
151 | seq_printf(f, "%-8s %-8s %-8s %-8s %-8s\n", | |
152 | "hard", "soft", "watchdog", | |
153 | "spurious", "multsvc"); | |
154 | break; | |
155 | case KSTAT_TYPE_IO: | |
156 | seq_printf(f, | |
157 | "%-8s %-8s %-8s %-8s %-8s %-8s " | |
158 | "%-8s %-8s %-8s %-8s %-8s %-8s\n", | |
159 | "nread", "nwritten", "reads", "writes", | |
160 | "wtime", "wlentime", "wupdate", | |
161 | "rtime", "rlentime", "rupdate", | |
162 | "wcnt", "rcnt"); | |
163 | break; | |
164 | case KSTAT_TYPE_TIMER: | |
165 | seq_printf(f, | |
166 | "%-31s %-8s " | |
167 | "%-8s %-8s %-8s %-8s %-8s\n", | |
168 | "name", "events", "elapsed", | |
169 | "min", "max", "start", "stop"); | |
170 | break; | |
171 | default: | |
55abb092 | 172 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 | 173 | } |
56d40a68 PS |
174 | |
175 | return -rc; | |
04a479f7 BB |
176 | } |
177 | ||
178 | static int | |
179 | kstat_seq_show_raw(struct seq_file *f, unsigned char *p, int l) | |
180 | { | |
181 | int i, j; | |
182 | ||
183 | for (i = 0; ; i++) { | |
184 | seq_printf(f, "%03x:", i); | |
185 | ||
186 | for (j = 0; j < 16; j++) { | |
187 | if (i * 16 + j >= l) { | |
188 | seq_printf(f, "\n"); | |
189 | goto out; | |
190 | } | |
191 | ||
192 | seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]); | |
193 | } | |
194 | seq_printf(f, "\n"); | |
195 | } | |
196 | out: | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static int | |
201 | kstat_seq_show_named(struct seq_file *f, kstat_named_t *knp) | |
202 | { | |
203 | seq_printf(f, "%-31s %-4d ", knp->name, knp->data_type); | |
204 | ||
205 | switch (knp->data_type) { | |
206 | case KSTAT_DATA_CHAR: | |
207 | knp->value.c[15] = '\0'; /* NULL terminate */ | |
208 | seq_printf(f, "%-16s", knp->value.c); | |
209 | break; | |
210 | /* XXX - We need to be more careful able what tokens are | |
211 | * used for each arch, for now this is correct for x86_64. | |
212 | */ | |
213 | case KSTAT_DATA_INT32: | |
214 | seq_printf(f, "%d", knp->value.i32); | |
215 | break; | |
216 | case KSTAT_DATA_UINT32: | |
217 | seq_printf(f, "%u", knp->value.ui32); | |
218 | break; | |
219 | case KSTAT_DATA_INT64: | |
cfe57499 | 220 | seq_printf(f, "%lld", (signed long long)knp->value.i64); |
04a479f7 BB |
221 | break; |
222 | case KSTAT_DATA_UINT64: | |
cfe57499 | 223 | seq_printf(f, "%llu", (unsigned long long)knp->value.ui64); |
04a479f7 BB |
224 | break; |
225 | case KSTAT_DATA_LONG: | |
226 | seq_printf(f, "%ld", knp->value.l); | |
227 | break; | |
228 | case KSTAT_DATA_ULONG: | |
cfe57499 | 229 | seq_printf(f, "%lu", knp->value.ul); |
04a479f7 BB |
230 | break; |
231 | case KSTAT_DATA_STRING: | |
232 | KSTAT_NAMED_STR_PTR(knp) | |
233 | [KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0'; | |
234 | seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp)); | |
235 | break; | |
236 | default: | |
55abb092 | 237 | PANIC("Undefined kstat data type %d\n", knp->data_type); |
04a479f7 BB |
238 | } |
239 | ||
240 | seq_printf(f, "\n"); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static int | |
246 | kstat_seq_show_intr(struct seq_file *f, kstat_intr_t *kip) | |
247 | { | |
248 | seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n", | |
249 | kip->intrs[KSTAT_INTR_HARD], | |
250 | kip->intrs[KSTAT_INTR_SOFT], | |
251 | kip->intrs[KSTAT_INTR_WATCHDOG], | |
252 | kip->intrs[KSTAT_INTR_SPURIOUS], | |
253 | kip->intrs[KSTAT_INTR_MULTSVC]); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static int | |
259 | kstat_seq_show_io(struct seq_file *f, kstat_io_t *kip) | |
260 | { | |
261 | seq_printf(f, | |
262 | "%-8llu %-8llu %-8u %-8u %-8lld %-8lld " | |
263 | "%-8lld %-8lld %-8lld %-8lld %-8u %-8u\n", | |
264 | kip->nread, kip->nwritten, | |
265 | kip->reads, kip->writes, | |
266 | kip->wtime, kip->wlentime, kip->wlastupdate, | |
267 | kip->rtime, kip->wlentime, kip->rlastupdate, | |
268 | kip->wcnt, kip->rcnt); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static int | |
274 | kstat_seq_show_timer(struct seq_file *f, kstat_timer_t *ktp) | |
275 | { | |
276 | seq_printf(f, | |
277 | "%-31s %-8llu %-8lld %-8lld %-8lld %-8lld %-8lld\n", | |
278 | ktp->name, ktp->num_events, ktp->elapsed_time, | |
279 | ktp->min_time, ktp->max_time, | |
280 | ktp->start_time, ktp->stop_time); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static int | |
286 | kstat_seq_show(struct seq_file *f, void *p) | |
287 | { | |
288 | kstat_t *ksp = (kstat_t *)f->private; | |
289 | int rc = 0; | |
290 | ||
291 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
292 | ||
293 | switch (ksp->ks_type) { | |
294 | case KSTAT_TYPE_RAW: | |
56d40a68 PS |
295 | restart: |
296 | if (ksp->ks_raw_ops.data) { | |
297 | rc = ksp->ks_raw_ops.data( | |
298 | ksp->ks_raw_buf, ksp->ks_raw_bufsize, p); | |
299 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) | |
300 | goto restart; | |
301 | if (!rc) | |
302 | seq_puts(f, ksp->ks_raw_buf); | |
303 | } else { | |
304 | ASSERT(ksp->ks_ndata == 1); | |
305 | rc = kstat_seq_show_raw(f, ksp->ks_data, | |
306 | ksp->ks_data_size); | |
307 | } | |
04a479f7 BB |
308 | break; |
309 | case KSTAT_TYPE_NAMED: | |
310 | rc = kstat_seq_show_named(f, (kstat_named_t *)p); | |
311 | break; | |
312 | case KSTAT_TYPE_INTR: | |
313 | rc = kstat_seq_show_intr(f, (kstat_intr_t *)p); | |
314 | break; | |
315 | case KSTAT_TYPE_IO: | |
316 | rc = kstat_seq_show_io(f, (kstat_io_t *)p); | |
317 | break; | |
318 | case KSTAT_TYPE_TIMER: | |
319 | rc = kstat_seq_show_timer(f, (kstat_timer_t *)p); | |
320 | break; | |
321 | default: | |
55abb092 | 322 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 BB |
323 | } |
324 | ||
56d40a68 | 325 | return -rc; |
04a479f7 BB |
326 | } |
327 | ||
9a8b7a74 BB |
328 | int |
329 | kstat_default_update(kstat_t *ksp, int rw) | |
330 | { | |
331 | ASSERT(ksp != NULL); | |
56d40a68 PS |
332 | |
333 | if (rw == KSTAT_WRITE) | |
334 | return (EACCES); | |
335 | ||
9a8b7a74 BB |
336 | return 0; |
337 | } | |
338 | ||
04a479f7 BB |
339 | static void * |
340 | kstat_seq_data_addr(kstat_t *ksp, loff_t n) | |
341 | { | |
342 | void *rc = NULL; | |
04a479f7 BB |
343 | |
344 | switch (ksp->ks_type) { | |
345 | case KSTAT_TYPE_RAW: | |
56d40a68 PS |
346 | if (ksp->ks_raw_ops.addr) |
347 | rc = ksp->ks_raw_ops.addr(ksp, n); | |
348 | else | |
349 | rc = ksp->ks_data; | |
04a479f7 BB |
350 | break; |
351 | case KSTAT_TYPE_NAMED: | |
352 | rc = ksp->ks_data + n * sizeof(kstat_named_t); | |
353 | break; | |
354 | case KSTAT_TYPE_INTR: | |
355 | rc = ksp->ks_data + n * sizeof(kstat_intr_t); | |
356 | break; | |
357 | case KSTAT_TYPE_IO: | |
358 | rc = ksp->ks_data + n * sizeof(kstat_io_t); | |
359 | break; | |
360 | case KSTAT_TYPE_TIMER: | |
361 | rc = ksp->ks_data + n * sizeof(kstat_timer_t); | |
362 | break; | |
363 | default: | |
55abb092 | 364 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 BB |
365 | } |
366 | ||
8d9a23e8 | 367 | return (rc); |
04a479f7 BB |
368 | } |
369 | ||
370 | static void * | |
371 | kstat_seq_start(struct seq_file *f, loff_t *pos) | |
372 | { | |
373 | loff_t n = *pos; | |
374 | kstat_t *ksp = (kstat_t *)f->private; | |
375 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 376 | |
ffbf0e57 | 377 | mutex_enter(ksp->ks_lock); |
71c9f0b0 | 378 | |
56d40a68 PS |
379 | if (ksp->ks_type == KSTAT_TYPE_RAW) { |
380 | ksp->ks_raw_bufsize = PAGE_SIZE; | |
381 | ksp->ks_raw_buf = vmem_alloc(ksp->ks_raw_bufsize, KM_SLEEP); | |
382 | } | |
383 | ||
9a8b7a74 BB |
384 | /* Dynamically update kstat, on error existing kstats are used */ |
385 | (void) ksp->ks_update(ksp, KSTAT_READ); | |
386 | ||
04a479f7 BB |
387 | ksp->ks_snaptime = gethrtime(); |
388 | ||
56d40a68 | 389 | if (!n && kstat_seq_show_headers(f)) |
8d9a23e8 | 390 | return (NULL); |
04a479f7 BB |
391 | |
392 | if (n >= ksp->ks_ndata) | |
8d9a23e8 | 393 | return (NULL); |
04a479f7 | 394 | |
8d9a23e8 | 395 | return (kstat_seq_data_addr(ksp, n)); |
04a479f7 BB |
396 | } |
397 | ||
398 | static void * | |
399 | kstat_seq_next(struct seq_file *f, void *p, loff_t *pos) | |
400 | { | |
401 | kstat_t *ksp = (kstat_t *)f->private; | |
402 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 BB |
403 | |
404 | ++*pos; | |
405 | if (*pos >= ksp->ks_ndata) | |
8d9a23e8 | 406 | return (NULL); |
04a479f7 | 407 | |
8d9a23e8 | 408 | return (kstat_seq_data_addr(ksp, *pos)); |
04a479f7 BB |
409 | } |
410 | ||
411 | static void | |
412 | kstat_seq_stop(struct seq_file *f, void *v) | |
413 | { | |
ffbf0e57 CP |
414 | kstat_t *ksp = (kstat_t *)f->private; |
415 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 416 | |
56d40a68 PS |
417 | if (ksp->ks_type == KSTAT_TYPE_RAW) |
418 | vmem_free(ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
419 | ||
ffbf0e57 | 420 | mutex_exit(ksp->ks_lock); |
04a479f7 BB |
421 | } |
422 | ||
423 | static struct seq_operations kstat_seq_ops = { | |
424 | .show = kstat_seq_show, | |
425 | .start = kstat_seq_start, | |
426 | .next = kstat_seq_next, | |
427 | .stop = kstat_seq_stop, | |
428 | }; | |
429 | ||
f2a745c4 RY |
430 | static kstat_module_t * |
431 | kstat_find_module(char *name) | |
432 | { | |
433 | kstat_module_t *module; | |
434 | ||
435 | list_for_each_entry(module, &kstat_module_list, ksm_module_list) | |
436 | if (strncmp(name, module->ksm_name, KSTAT_STRLEN) == 0) | |
437 | return (module); | |
438 | ||
439 | return (NULL); | |
440 | } | |
441 | ||
442 | static kstat_module_t * | |
443 | kstat_create_module(char *name) | |
444 | { | |
445 | kstat_module_t *module; | |
446 | struct proc_dir_entry *pde; | |
447 | ||
448 | pde = proc_mkdir(name, proc_spl_kstat); | |
449 | if (pde == NULL) | |
450 | return (NULL); | |
451 | ||
452 | module = kmem_alloc(sizeof (kstat_module_t), KM_SLEEP); | |
453 | module->ksm_proc = pde; | |
454 | strlcpy(module->ksm_name, name, KSTAT_STRLEN+1); | |
455 | INIT_LIST_HEAD(&module->ksm_kstat_list); | |
456 | list_add_tail(&module->ksm_module_list, &kstat_module_list); | |
457 | ||
458 | return (module); | |
459 | ||
460 | } | |
461 | ||
462 | static void | |
463 | kstat_delete_module(kstat_module_t *module) | |
464 | { | |
465 | ASSERT(list_empty(&module->ksm_kstat_list)); | |
466 | remove_proc_entry(module->ksm_name, proc_spl_kstat); | |
467 | list_del(&module->ksm_module_list); | |
468 | kmem_free(module, sizeof(kstat_module_t)); | |
469 | } | |
470 | ||
04a479f7 BB |
471 | static int |
472 | proc_kstat_open(struct inode *inode, struct file *filp) | |
473 | { | |
474 | struct seq_file *f; | |
475 | int rc; | |
476 | ||
477 | rc = seq_open(filp, &kstat_seq_ops); | |
478 | if (rc) | |
479 | return rc; | |
480 | ||
481 | f = filp->private_data; | |
1ddf9722 | 482 | f->private = PDE_DATA(inode); |
04a479f7 BB |
483 | |
484 | return rc; | |
485 | } | |
486 | ||
56d40a68 PS |
487 | static ssize_t |
488 | proc_kstat_write(struct file *filp, const char __user *buf, | |
489 | size_t len, loff_t *ppos) | |
490 | { | |
491 | struct seq_file *f = filp->private_data; | |
492 | kstat_t *ksp = f->private; | |
493 | int rc; | |
494 | ||
495 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
496 | ||
497 | mutex_enter(ksp->ks_lock); | |
498 | rc = ksp->ks_update(ksp, KSTAT_WRITE); | |
499 | mutex_exit(ksp->ks_lock); | |
500 | ||
501 | if (rc) | |
502 | return (-rc); | |
503 | ||
504 | *ppos += len; | |
505 | return (len); | |
506 | } | |
507 | ||
04a479f7 | 508 | static struct file_operations proc_kstat_operations = { |
56d40a68 PS |
509 | .open = proc_kstat_open, |
510 | .write = proc_kstat_write, | |
511 | .read = seq_read, | |
512 | .llseek = seq_lseek, | |
513 | .release = seq_release, | |
04a479f7 BB |
514 | }; |
515 | ||
56d40a68 PS |
516 | void |
517 | __kstat_set_raw_ops(kstat_t *ksp, | |
518 | int (*headers)(char *buf, size_t size), | |
519 | int (*data)(char *buf, size_t size, void *data), | |
520 | void *(*addr)(kstat_t *ksp, loff_t index)) | |
521 | { | |
522 | ksp->ks_raw_ops.headers = headers; | |
523 | ksp->ks_raw_ops.data = data; | |
524 | ksp->ks_raw_ops.addr = addr; | |
525 | } | |
526 | EXPORT_SYMBOL(__kstat_set_raw_ops); | |
527 | ||
04a479f7 BB |
528 | kstat_t * |
529 | __kstat_create(const char *ks_module, int ks_instance, const char *ks_name, | |
530 | const char *ks_class, uchar_t ks_type, uint_t ks_ndata, | |
531 | uchar_t ks_flags) | |
532 | { | |
533 | kstat_t *ksp; | |
534 | ||
535 | ASSERT(ks_module); | |
536 | ASSERT(ks_instance == 0); | |
537 | ASSERT(ks_name); | |
538 | ASSERT(!(ks_flags & KSTAT_FLAG_UNSUPPORTED)); | |
539 | ||
540 | if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO)) | |
541 | ASSERT(ks_ndata == 1); | |
542 | ||
543 | ksp = kmem_zalloc(sizeof(*ksp), KM_SLEEP); | |
544 | if (ksp == NULL) | |
545 | return ksp; | |
546 | ||
f2a745c4 | 547 | mutex_enter(&kstat_module_lock); |
04a479f7 BB |
548 | ksp->ks_kid = kstat_id; |
549 | kstat_id++; | |
f2a745c4 | 550 | mutex_exit(&kstat_module_lock); |
04a479f7 BB |
551 | |
552 | ksp->ks_magic = KS_MAGIC; | |
ffbf0e57 CP |
553 | mutex_init(&ksp->ks_private_lock, NULL, MUTEX_DEFAULT, NULL); |
554 | ksp->ks_lock = &ksp->ks_private_lock; | |
04a479f7 BB |
555 | INIT_LIST_HEAD(&ksp->ks_list); |
556 | ||
557 | ksp->ks_crtime = gethrtime(); | |
558 | ksp->ks_snaptime = ksp->ks_crtime; | |
559 | strncpy(ksp->ks_module, ks_module, KSTAT_STRLEN); | |
560 | ksp->ks_instance = ks_instance; | |
561 | strncpy(ksp->ks_name, ks_name, KSTAT_STRLEN); | |
562 | strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN); | |
563 | ksp->ks_type = ks_type; | |
564 | ksp->ks_flags = ks_flags; | |
9a8b7a74 BB |
565 | ksp->ks_update = kstat_default_update; |
566 | ksp->ks_private = NULL; | |
56d40a68 PS |
567 | ksp->ks_raw_ops.headers = NULL; |
568 | ksp->ks_raw_ops.data = NULL; | |
569 | ksp->ks_raw_ops.addr = NULL; | |
570 | ksp->ks_raw_buf = NULL; | |
571 | ksp->ks_raw_bufsize = 0; | |
04a479f7 BB |
572 | |
573 | switch (ksp->ks_type) { | |
574 | case KSTAT_TYPE_RAW: | |
575 | ksp->ks_ndata = 1; | |
576 | ksp->ks_data_size = ks_ndata; | |
577 | break; | |
578 | case KSTAT_TYPE_NAMED: | |
579 | ksp->ks_ndata = ks_ndata; | |
580 | ksp->ks_data_size = ks_ndata * sizeof(kstat_named_t); | |
581 | break; | |
582 | case KSTAT_TYPE_INTR: | |
583 | ksp->ks_ndata = ks_ndata; | |
584 | ksp->ks_data_size = ks_ndata * sizeof(kstat_intr_t); | |
585 | break; | |
586 | case KSTAT_TYPE_IO: | |
587 | ksp->ks_ndata = ks_ndata; | |
588 | ksp->ks_data_size = ks_ndata * sizeof(kstat_io_t); | |
589 | break; | |
590 | case KSTAT_TYPE_TIMER: | |
591 | ksp->ks_ndata = ks_ndata; | |
592 | ksp->ks_data_size = ks_ndata * sizeof(kstat_timer_t); | |
593 | break; | |
594 | default: | |
55abb092 | 595 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 BB |
596 | } |
597 | ||
598 | if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) { | |
599 | ksp->ks_data = NULL; | |
600 | } else { | |
f483a97a | 601 | ksp->ks_data = kmem_zalloc(ksp->ks_data_size, KM_SLEEP); |
04a479f7 BB |
602 | if (ksp->ks_data == NULL) { |
603 | kmem_free(ksp, sizeof(*ksp)); | |
604 | ksp = NULL; | |
605 | } | |
606 | } | |
607 | ||
608 | return ksp; | |
609 | } | |
610 | EXPORT_SYMBOL(__kstat_create); | |
611 | ||
cd478018 | 612 | static int |
613 | kstat_detect_collision(kstat_t *ksp) | |
614 | { | |
615 | kstat_module_t *module; | |
616 | kstat_t *tmp; | |
617 | char parent[KSTAT_STRLEN+1]; | |
618 | char *cp; | |
619 | ||
620 | (void) strlcpy(parent, ksp->ks_module, sizeof(parent)); | |
621 | ||
622 | if ((cp = strrchr(parent, '/')) == NULL) | |
623 | return (0); | |
624 | ||
625 | cp[0] = '\0'; | |
626 | if ((module = kstat_find_module(parent)) != NULL) { | |
627 | list_for_each_entry(tmp, &module->ksm_kstat_list, ks_list) | |
628 | if (strncmp(tmp->ks_name, cp+1, KSTAT_STRLEN) == 0) | |
629 | return (EEXIST); | |
630 | } | |
631 | ||
632 | return (0); | |
633 | } | |
634 | ||
04a479f7 BB |
635 | void |
636 | __kstat_install(kstat_t *ksp) | |
637 | { | |
f2a745c4 | 638 | kstat_module_t *module; |
04a479f7 | 639 | kstat_t *tmp; |
04a479f7 | 640 | |
f2a745c4 | 641 | ASSERT(ksp); |
04a479f7 | 642 | |
f2a745c4 | 643 | mutex_enter(&kstat_module_lock); |
04a479f7 | 644 | |
f2a745c4 RY |
645 | module = kstat_find_module(ksp->ks_module); |
646 | if (module == NULL) { | |
cd478018 | 647 | if (kstat_detect_collision(ksp) != 0) { |
648 | cmn_err(CE_WARN, "kstat_create('%s', '%s'): namespace" \ | |
649 | " collision", ksp->ks_module, ksp->ks_name); | |
650 | goto out; | |
651 | } | |
f2a745c4 RY |
652 | module = kstat_create_module(ksp->ks_module); |
653 | if (module == NULL) | |
654 | goto out; | |
04a479f7 BB |
655 | } |
656 | ||
f2a745c4 RY |
657 | /* |
658 | * Only one entry by this name per-module, on failure the module | |
659 | * shouldn't be deleted because we know it has at least one entry. | |
660 | */ | |
661 | list_for_each_entry(tmp, &module->ksm_kstat_list, ks_list) | |
662 | if (strncmp(tmp->ks_name, ksp->ks_name, KSTAT_STRLEN) == 0) | |
663 | goto out; | |
664 | ||
665 | list_add_tail(&ksp->ks_list, &module->ksm_kstat_list); | |
04a479f7 | 666 | |
ffbf0e57 | 667 | mutex_enter(ksp->ks_lock); |
f2a745c4 | 668 | ksp->ks_owner = module; |
56d40a68 | 669 | ksp->ks_proc = proc_create_data(ksp->ks_name, 0644, |
f2a745c4 RY |
670 | module->ksm_proc, &proc_kstat_operations, (void *)ksp); |
671 | if (ksp->ks_proc == NULL) { | |
672 | list_del_init(&ksp->ks_list); | |
673 | if (list_empty(&module->ksm_kstat_list)) | |
674 | kstat_delete_module(module); | |
675 | } | |
ffbf0e57 | 676 | mutex_exit(ksp->ks_lock); |
04a479f7 | 677 | out: |
f2a745c4 | 678 | mutex_exit(&kstat_module_lock); |
04a479f7 BB |
679 | } |
680 | EXPORT_SYMBOL(__kstat_install); | |
681 | ||
682 | void | |
683 | __kstat_delete(kstat_t *ksp) | |
684 | { | |
f2a745c4 | 685 | kstat_module_t *module = ksp->ks_owner; |
04a479f7 | 686 | |
f2a745c4 RY |
687 | mutex_enter(&kstat_module_lock); |
688 | list_del_init(&ksp->ks_list); | |
689 | mutex_exit(&kstat_module_lock); | |
04a479f7 | 690 | |
f2a745c4 RY |
691 | if (ksp->ks_proc) { |
692 | remove_proc_entry(ksp->ks_name, module->ksm_proc); | |
04a479f7 | 693 | |
f2a745c4 RY |
694 | /* Remove top level module directory if it's empty */ |
695 | if (list_empty(&module->ksm_kstat_list)) | |
696 | kstat_delete_module(module); | |
04a479f7 BB |
697 | } |
698 | ||
699 | if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL)) | |
f2a745c4 | 700 | kmem_free(ksp->ks_data, ksp->ks_data_size); |
04a479f7 | 701 | |
ffbf0e57 CP |
702 | ksp->ks_lock = NULL; |
703 | mutex_destroy(&ksp->ks_private_lock); | |
04a479f7 BB |
704 | kmem_free(ksp, sizeof(*ksp)); |
705 | ||
706 | return; | |
707 | } | |
708 | EXPORT_SYMBOL(__kstat_delete); | |
709 | ||
04a479f7 | 710 | int |
1114ae6a | 711 | spl_kstat_init(void) |
04a479f7 | 712 | { |
f2a745c4 RY |
713 | mutex_init(&kstat_module_lock, NULL, MUTEX_DEFAULT, NULL); |
714 | INIT_LIST_HEAD(&kstat_module_list); | |
04a479f7 | 715 | kstat_id = 0; |
8d9a23e8 | 716 | return (0); |
04a479f7 BB |
717 | } |
718 | ||
719 | void | |
1114ae6a | 720 | spl_kstat_fini(void) |
04a479f7 | 721 | { |
f2a745c4 RY |
722 | ASSERT(list_empty(&kstat_module_list)); |
723 | mutex_destroy(&kstat_module_lock); | |
04a479f7 BB |
724 | } |
725 |