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4b393c50 | 1 | /* |
716154c5 BB |
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 | 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 | 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 | 22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. |
5461eefe | 23 | * |
716154c5 | 24 | * Solaris Porting Layer (SPL) Kstat Implementation. |
4b393c50 | 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> |
5712fade | 31 | #include <sys/sysmacros.h> |
04a479f7 | 32 | |
1ddf9722 | 33 | #ifndef HAVE_PDE_DATA |
5461eefe | 34 | #define PDE_DATA(x) (PDE(x)->data) |
1ddf9722 | 35 | #endif |
b17edc10 | 36 | |
f2a745c4 RY |
37 | static kmutex_t kstat_module_lock; |
38 | static struct list_head kstat_module_list; | |
04a479f7 | 39 | static kid_t kstat_id; |
40 | ||
56d40a68 PS |
41 | static int |
42 | kstat_resize_raw(kstat_t *ksp) | |
43 | { | |
44 | if (ksp->ks_raw_bufsize == KSTAT_RAW_MAX) | |
5461eefe | 45 | return (ENOMEM); |
56d40a68 PS |
46 | |
47 | vmem_free(ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
48 | ksp->ks_raw_bufsize = MIN(ksp->ks_raw_bufsize * 2, KSTAT_RAW_MAX); | |
49 | ksp->ks_raw_buf = vmem_alloc(ksp->ks_raw_bufsize, KM_SLEEP); | |
50 | ||
5461eefe | 51 | return (0); |
56d40a68 PS |
52 | } |
53 | ||
f483a97a NB |
54 | void |
55 | kstat_waitq_enter(kstat_io_t *kiop) | |
56 | { | |
57 | hrtime_t new, delta; | |
58 | ulong_t wcnt; | |
59 | ||
60 | new = gethrtime(); | |
61 | delta = new - kiop->wlastupdate; | |
62 | kiop->wlastupdate = new; | |
63 | wcnt = kiop->wcnt++; | |
64 | if (wcnt != 0) { | |
65 | kiop->wlentime += delta * wcnt; | |
66 | kiop->wtime += delta; | |
67 | } | |
68 | } | |
69 | EXPORT_SYMBOL(kstat_waitq_enter); | |
70 | ||
71 | void | |
72 | kstat_waitq_exit(kstat_io_t *kiop) | |
73 | { | |
74 | hrtime_t new, delta; | |
75 | ulong_t wcnt; | |
76 | ||
77 | new = gethrtime(); | |
78 | delta = new - kiop->wlastupdate; | |
79 | kiop->wlastupdate = new; | |
80 | wcnt = kiop->wcnt--; | |
81 | ASSERT((int)wcnt > 0); | |
82 | kiop->wlentime += delta * wcnt; | |
83 | kiop->wtime += delta; | |
84 | } | |
85 | EXPORT_SYMBOL(kstat_waitq_exit); | |
86 | ||
87 | void | |
88 | kstat_runq_enter(kstat_io_t *kiop) | |
89 | { | |
90 | hrtime_t new, delta; | |
91 | ulong_t rcnt; | |
92 | ||
93 | new = gethrtime(); | |
94 | delta = new - kiop->rlastupdate; | |
95 | kiop->rlastupdate = new; | |
96 | rcnt = kiop->rcnt++; | |
97 | if (rcnt != 0) { | |
98 | kiop->rlentime += delta * rcnt; | |
99 | kiop->rtime += delta; | |
100 | } | |
101 | } | |
102 | EXPORT_SYMBOL(kstat_runq_enter); | |
103 | ||
104 | void | |
105 | kstat_runq_exit(kstat_io_t *kiop) | |
106 | { | |
107 | hrtime_t new, delta; | |
108 | ulong_t rcnt; | |
109 | ||
110 | new = gethrtime(); | |
111 | delta = new - kiop->rlastupdate; | |
112 | kiop->rlastupdate = new; | |
113 | rcnt = kiop->rcnt--; | |
114 | ASSERT((int)rcnt > 0); | |
115 | kiop->rlentime += delta * rcnt; | |
116 | kiop->rtime += delta; | |
117 | } | |
118 | EXPORT_SYMBOL(kstat_runq_exit); | |
119 | ||
56d40a68 | 120 | static int |
04a479f7 | 121 | kstat_seq_show_headers(struct seq_file *f) |
122 | { | |
5461eefe | 123 | kstat_t *ksp = (kstat_t *)f->private; |
56d40a68 PS |
124 | int rc = 0; |
125 | ||
5461eefe | 126 | ASSERT(ksp->ks_magic == KS_MAGIC); |
04a479f7 | 127 | |
5461eefe BB |
128 | seq_printf(f, "%d %d 0x%02x %d %d %lld %lld\n", |
129 | ksp->ks_kid, ksp->ks_type, ksp->ks_flags, | |
130 | ksp->ks_ndata, (int)ksp->ks_data_size, | |
131 | ksp->ks_crtime, ksp->ks_snaptime); | |
04a479f7 | 132 | |
133 | switch (ksp->ks_type) { | |
5461eefe | 134 | case KSTAT_TYPE_RAW: |
56d40a68 | 135 | restart: |
5461eefe BB |
136 | if (ksp->ks_raw_ops.headers) { |
137 | rc = ksp->ks_raw_ops.headers( | |
138 | ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
56d40a68 PS |
139 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) |
140 | goto restart; | |
141 | if (!rc) | |
5461eefe BB |
142 | seq_puts(f, ksp->ks_raw_buf); |
143 | } else { | |
144 | seq_printf(f, "raw data\n"); | |
145 | } | |
146 | break; | |
147 | case KSTAT_TYPE_NAMED: | |
148 | seq_printf(f, "%-31s %-4s %s\n", | |
149 | "name", "type", "data"); | |
150 | break; | |
151 | case KSTAT_TYPE_INTR: | |
152 | seq_printf(f, "%-8s %-8s %-8s %-8s %-8s\n", | |
153 | "hard", "soft", "watchdog", | |
154 | "spurious", "multsvc"); | |
155 | break; | |
156 | case KSTAT_TYPE_IO: | |
157 | seq_printf(f, | |
158 | "%-8s %-8s %-8s %-8s %-8s %-8s " | |
159 | "%-8s %-8s %-8s %-8s %-8s %-8s\n", | |
160 | "nread", "nwritten", "reads", "writes", | |
161 | "wtime", "wlentime", "wupdate", | |
162 | "rtime", "rlentime", "rupdate", | |
163 | "wcnt", "rcnt"); | |
164 | break; | |
165 | case KSTAT_TYPE_TIMER: | |
166 | seq_printf(f, | |
167 | "%-31s %-8s " | |
168 | "%-8s %-8s %-8s %-8s %-8s\n", | |
169 | "name", "events", "elapsed", | |
170 | "min", "max", "start", "stop"); | |
171 | break; | |
172 | default: | |
173 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
174 | } | |
175 | ||
176 | return (-rc); | |
04a479f7 | 177 | } |
178 | ||
179 | static int | |
180 | kstat_seq_show_raw(struct seq_file *f, unsigned char *p, int l) | |
181 | { | |
5461eefe | 182 | int i, j; |
04a479f7 | 183 | |
5461eefe BB |
184 | for (i = 0; ; i++) { |
185 | seq_printf(f, "%03x:", i); | |
04a479f7 | 186 | |
5461eefe BB |
187 | for (j = 0; j < 16; j++) { |
188 | if (i * 16 + j >= l) { | |
189 | seq_printf(f, "\n"); | |
190 | goto out; | |
191 | } | |
04a479f7 | 192 | |
5461eefe BB |
193 | seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]); |
194 | } | |
195 | seq_printf(f, "\n"); | |
196 | } | |
04a479f7 | 197 | out: |
5461eefe | 198 | return (0); |
04a479f7 | 199 | } |
200 | ||
201 | static int | |
202 | kstat_seq_show_named(struct seq_file *f, kstat_named_t *knp) | |
203 | { | |
5461eefe BB |
204 | seq_printf(f, "%-31s %-4d ", knp->name, knp->data_type); |
205 | ||
206 | switch (knp->data_type) { | |
207 | case KSTAT_DATA_CHAR: | |
208 | knp->value.c[15] = '\0'; /* NULL terminate */ | |
209 | seq_printf(f, "%-16s", knp->value.c); | |
210 | break; | |
211 | /* | |
212 | * NOTE - We need to be more careful able what tokens are | |
213 | * used for each arch, for now this is correct for x86_64. | |
214 | */ | |
215 | case KSTAT_DATA_INT32: | |
216 | seq_printf(f, "%d", knp->value.i32); | |
217 | break; | |
218 | case KSTAT_DATA_UINT32: | |
219 | seq_printf(f, "%u", knp->value.ui32); | |
220 | break; | |
221 | case KSTAT_DATA_INT64: | |
222 | seq_printf(f, "%lld", (signed long long)knp->value.i64); | |
223 | break; | |
224 | case KSTAT_DATA_UINT64: | |
225 | seq_printf(f, "%llu", | |
226 | (unsigned long long)knp->value.ui64); | |
227 | break; | |
228 | case KSTAT_DATA_LONG: | |
229 | seq_printf(f, "%ld", knp->value.l); | |
230 | break; | |
231 | case KSTAT_DATA_ULONG: | |
232 | seq_printf(f, "%lu", knp->value.ul); | |
233 | break; | |
234 | case KSTAT_DATA_STRING: | |
235 | KSTAT_NAMED_STR_PTR(knp) | |
236 | [KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0'; | |
237 | seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp)); | |
238 | break; | |
239 | default: | |
240 | PANIC("Undefined kstat data type %d\n", knp->data_type); | |
241 | } | |
242 | ||
243 | seq_printf(f, "\n"); | |
244 | ||
245 | return (0); | |
04a479f7 | 246 | } |
247 | ||
248 | static int | |
249 | kstat_seq_show_intr(struct seq_file *f, kstat_intr_t *kip) | |
250 | { | |
5461eefe BB |
251 | seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n", |
252 | kip->intrs[KSTAT_INTR_HARD], | |
253 | kip->intrs[KSTAT_INTR_SOFT], | |
254 | kip->intrs[KSTAT_INTR_WATCHDOG], | |
255 | kip->intrs[KSTAT_INTR_SPURIOUS], | |
256 | kip->intrs[KSTAT_INTR_MULTSVC]); | |
257 | ||
258 | return (0); | |
04a479f7 | 259 | } |
260 | ||
261 | static int | |
262 | kstat_seq_show_io(struct seq_file *f, kstat_io_t *kip) | |
263 | { | |
5461eefe BB |
264 | seq_printf(f, |
265 | "%-8llu %-8llu %-8u %-8u %-8lld %-8lld " | |
266 | "%-8lld %-8lld %-8lld %-8lld %-8u %-8u\n", | |
267 | kip->nread, kip->nwritten, | |
268 | kip->reads, kip->writes, | |
269 | kip->wtime, kip->wlentime, kip->wlastupdate, | |
270 | kip->rtime, kip->rlentime, kip->rlastupdate, | |
271 | kip->wcnt, kip->rcnt); | |
272 | ||
273 | return (0); | |
04a479f7 | 274 | } |
275 | ||
276 | static int | |
277 | kstat_seq_show_timer(struct seq_file *f, kstat_timer_t *ktp) | |
278 | { | |
5461eefe BB |
279 | seq_printf(f, |
280 | "%-31s %-8llu %-8lld %-8lld %-8lld %-8lld %-8lld\n", | |
281 | ktp->name, ktp->num_events, ktp->elapsed_time, | |
282 | ktp->min_time, ktp->max_time, | |
283 | ktp->start_time, ktp->stop_time); | |
04a479f7 | 284 | |
5461eefe | 285 | return (0); |
04a479f7 | 286 | } |
287 | ||
288 | static int | |
289 | kstat_seq_show(struct seq_file *f, void *p) | |
290 | { | |
5461eefe BB |
291 | kstat_t *ksp = (kstat_t *)f->private; |
292 | int rc = 0; | |
04a479f7 | 293 | |
5461eefe | 294 | ASSERT(ksp->ks_magic == KS_MAGIC); |
04a479f7 | 295 | |
296 | switch (ksp->ks_type) { | |
5461eefe | 297 | case KSTAT_TYPE_RAW: |
56d40a68 | 298 | restart: |
5461eefe BB |
299 | if (ksp->ks_raw_ops.data) { |
300 | rc = ksp->ks_raw_ops.data( | |
56d40a68 PS |
301 | ksp->ks_raw_buf, ksp->ks_raw_bufsize, p); |
302 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) | |
303 | goto restart; | |
304 | if (!rc) | |
5461eefe BB |
305 | seq_puts(f, ksp->ks_raw_buf); |
306 | } else { | |
307 | ASSERT(ksp->ks_ndata == 1); | |
308 | rc = kstat_seq_show_raw(f, ksp->ks_data, | |
3673d032 | 309 | ksp->ks_data_size); |
5461eefe BB |
310 | } |
311 | break; | |
312 | case KSTAT_TYPE_NAMED: | |
313 | rc = kstat_seq_show_named(f, (kstat_named_t *)p); | |
314 | break; | |
315 | case KSTAT_TYPE_INTR: | |
316 | rc = kstat_seq_show_intr(f, (kstat_intr_t *)p); | |
317 | break; | |
318 | case KSTAT_TYPE_IO: | |
319 | rc = kstat_seq_show_io(f, (kstat_io_t *)p); | |
320 | break; | |
321 | case KSTAT_TYPE_TIMER: | |
322 | rc = kstat_seq_show_timer(f, (kstat_timer_t *)p); | |
323 | break; | |
324 | default: | |
325 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
326 | } | |
327 | ||
328 | return (-rc); | |
04a479f7 | 329 | } |
330 | ||
68386b05 | 331 | static int |
9a8b7a74 BB |
332 | kstat_default_update(kstat_t *ksp, int rw) |
333 | { | |
334 | ASSERT(ksp != NULL); | |
56d40a68 PS |
335 | |
336 | if (rw == KSTAT_WRITE) | |
337 | return (EACCES); | |
338 | ||
5461eefe | 339 | return (0); |
9a8b7a74 BB |
340 | } |
341 | ||
04a479f7 | 342 | static void * |
343 | kstat_seq_data_addr(kstat_t *ksp, loff_t n) | |
344 | { | |
5461eefe | 345 | void *rc = NULL; |
04a479f7 | 346 | |
347 | switch (ksp->ks_type) { | |
5461eefe BB |
348 | case KSTAT_TYPE_RAW: |
349 | if (ksp->ks_raw_ops.addr) | |
350 | rc = ksp->ks_raw_ops.addr(ksp, n); | |
351 | else | |
352 | rc = ksp->ks_data; | |
353 | break; | |
354 | case KSTAT_TYPE_NAMED: | |
355 | rc = ksp->ks_data + n * sizeof (kstat_named_t); | |
356 | break; | |
357 | case KSTAT_TYPE_INTR: | |
358 | rc = ksp->ks_data + n * sizeof (kstat_intr_t); | |
359 | break; | |
360 | case KSTAT_TYPE_IO: | |
361 | rc = ksp->ks_data + n * sizeof (kstat_io_t); | |
362 | break; | |
363 | case KSTAT_TYPE_TIMER: | |
364 | rc = ksp->ks_data + n * sizeof (kstat_timer_t); | |
365 | break; | |
366 | default: | |
367 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
368 | } | |
369 | ||
370 | return (rc); | |
04a479f7 | 371 | } |
372 | ||
373 | static void * | |
374 | kstat_seq_start(struct seq_file *f, loff_t *pos) | |
375 | { | |
5461eefe BB |
376 | loff_t n = *pos; |
377 | kstat_t *ksp = (kstat_t *)f->private; | |
378 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 379 | |
ffbf0e57 | 380 | mutex_enter(ksp->ks_lock); |
71c9f0b0 | 381 | |
5461eefe BB |
382 | if (ksp->ks_type == KSTAT_TYPE_RAW) { |
383 | ksp->ks_raw_bufsize = PAGE_SIZE; | |
384 | ksp->ks_raw_buf = vmem_alloc(ksp->ks_raw_bufsize, KM_SLEEP); | |
385 | } | |
56d40a68 | 386 | |
5461eefe BB |
387 | /* Dynamically update kstat, on error existing kstats are used */ |
388 | (void) ksp->ks_update(ksp, KSTAT_READ); | |
9a8b7a74 | 389 | |
04a479f7 | 390 | ksp->ks_snaptime = gethrtime(); |
391 | ||
5461eefe | 392 | if (!n && kstat_seq_show_headers(f)) |
8d9a23e8 | 393 | return (NULL); |
04a479f7 | 394 | |
5461eefe BB |
395 | if (n >= ksp->ks_ndata) |
396 | return (NULL); | |
04a479f7 | 397 | |
5461eefe | 398 | return (kstat_seq_data_addr(ksp, n)); |
04a479f7 | 399 | } |
400 | ||
401 | static void * | |
402 | kstat_seq_next(struct seq_file *f, void *p, loff_t *pos) | |
403 | { | |
5461eefe BB |
404 | kstat_t *ksp = (kstat_t *)f->private; |
405 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 406 | |
5461eefe BB |
407 | ++*pos; |
408 | if (*pos >= ksp->ks_ndata) | |
409 | return (NULL); | |
04a479f7 | 410 | |
5461eefe | 411 | return (kstat_seq_data_addr(ksp, *pos)); |
04a479f7 | 412 | } |
413 | ||
414 | static void | |
415 | kstat_seq_stop(struct seq_file *f, void *v) | |
416 | { | |
ffbf0e57 CP |
417 | kstat_t *ksp = (kstat_t *)f->private; |
418 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 419 | |
56d40a68 PS |
420 | if (ksp->ks_type == KSTAT_TYPE_RAW) |
421 | vmem_free(ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
422 | ||
ffbf0e57 | 423 | mutex_exit(ksp->ks_lock); |
04a479f7 | 424 | } |
425 | ||
426 | static struct seq_operations kstat_seq_ops = { | |
5461eefe BB |
427 | .show = kstat_seq_show, |
428 | .start = kstat_seq_start, | |
429 | .next = kstat_seq_next, | |
430 | .stop = kstat_seq_stop, | |
04a479f7 | 431 | }; |
432 | ||
f2a745c4 RY |
433 | static kstat_module_t * |
434 | kstat_find_module(char *name) | |
435 | { | |
436 | kstat_module_t *module; | |
437 | ||
3673d032 | 438 | list_for_each_entry(module, &kstat_module_list, ksm_module_list) { |
f2a745c4 RY |
439 | if (strncmp(name, module->ksm_name, KSTAT_STRLEN) == 0) |
440 | return (module); | |
3673d032 | 441 | } |
f2a745c4 RY |
442 | |
443 | return (NULL); | |
444 | } | |
445 | ||
446 | static kstat_module_t * | |
447 | kstat_create_module(char *name) | |
448 | { | |
449 | kstat_module_t *module; | |
450 | struct proc_dir_entry *pde; | |
451 | ||
452 | pde = proc_mkdir(name, proc_spl_kstat); | |
453 | if (pde == NULL) | |
454 | return (NULL); | |
455 | ||
456 | module = kmem_alloc(sizeof (kstat_module_t), KM_SLEEP); | |
457 | module->ksm_proc = pde; | |
458 | strlcpy(module->ksm_name, name, KSTAT_STRLEN+1); | |
459 | INIT_LIST_HEAD(&module->ksm_kstat_list); | |
460 | list_add_tail(&module->ksm_module_list, &kstat_module_list); | |
461 | ||
462 | return (module); | |
463 | ||
464 | } | |
465 | ||
466 | static void | |
467 | kstat_delete_module(kstat_module_t *module) | |
468 | { | |
469 | ASSERT(list_empty(&module->ksm_kstat_list)); | |
470 | remove_proc_entry(module->ksm_name, proc_spl_kstat); | |
471 | list_del(&module->ksm_module_list); | |
5461eefe | 472 | kmem_free(module, sizeof (kstat_module_t)); |
f2a745c4 RY |
473 | } |
474 | ||
04a479f7 | 475 | static int |
476 | proc_kstat_open(struct inode *inode, struct file *filp) | |
477 | { | |
5461eefe BB |
478 | struct seq_file *f; |
479 | int rc; | |
04a479f7 | 480 | |
5461eefe BB |
481 | rc = seq_open(filp, &kstat_seq_ops); |
482 | if (rc) | |
483 | return (rc); | |
04a479f7 | 484 | |
5461eefe BB |
485 | f = filp->private_data; |
486 | f->private = PDE_DATA(inode); | |
04a479f7 | 487 | |
5461eefe | 488 | return (rc); |
04a479f7 | 489 | } |
490 | ||
56d40a68 | 491 | static ssize_t |
5461eefe BB |
492 | proc_kstat_write(struct file *filp, const char __user *buf, size_t len, |
493 | loff_t *ppos) | |
56d40a68 PS |
494 | { |
495 | struct seq_file *f = filp->private_data; | |
496 | kstat_t *ksp = f->private; | |
497 | int rc; | |
498 | ||
499 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
500 | ||
501 | mutex_enter(ksp->ks_lock); | |
502 | rc = ksp->ks_update(ksp, KSTAT_WRITE); | |
503 | mutex_exit(ksp->ks_lock); | |
504 | ||
505 | if (rc) | |
506 | return (-rc); | |
507 | ||
508 | *ppos += len; | |
509 | return (len); | |
510 | } | |
511 | ||
04a479f7 | 512 | static struct file_operations proc_kstat_operations = { |
56d40a68 PS |
513 | .open = proc_kstat_open, |
514 | .write = proc_kstat_write, | |
515 | .read = seq_read, | |
516 | .llseek = seq_lseek, | |
517 | .release = seq_release, | |
04a479f7 | 518 | }; |
519 | ||
56d40a68 PS |
520 | void |
521 | __kstat_set_raw_ops(kstat_t *ksp, | |
3673d032 BB |
522 | int (*headers)(char *buf, size_t size), |
523 | int (*data)(char *buf, size_t size, void *data), | |
524 | void *(*addr)(kstat_t *ksp, loff_t index)) | |
56d40a68 PS |
525 | { |
526 | ksp->ks_raw_ops.headers = headers; | |
527 | ksp->ks_raw_ops.data = data; | |
528 | ksp->ks_raw_ops.addr = addr; | |
529 | } | |
530 | EXPORT_SYMBOL(__kstat_set_raw_ops); | |
531 | ||
04a479f7 | 532 | kstat_t * |
533 | __kstat_create(const char *ks_module, int ks_instance, const char *ks_name, | |
5461eefe BB |
534 | const char *ks_class, uchar_t ks_type, uint_t ks_ndata, |
535 | uchar_t ks_flags) | |
04a479f7 | 536 | { |
537 | kstat_t *ksp; | |
538 | ||
539 | ASSERT(ks_module); | |
540 | ASSERT(ks_instance == 0); | |
541 | ASSERT(ks_name); | |
542 | ASSERT(!(ks_flags & KSTAT_FLAG_UNSUPPORTED)); | |
543 | ||
544 | if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO)) | |
5461eefe | 545 | ASSERT(ks_ndata == 1); |
04a479f7 | 546 | |
5461eefe | 547 | ksp = kmem_zalloc(sizeof (*ksp), KM_SLEEP); |
04a479f7 | 548 | if (ksp == NULL) |
5461eefe | 549 | return (ksp); |
04a479f7 | 550 | |
f2a745c4 | 551 | mutex_enter(&kstat_module_lock); |
04a479f7 | 552 | ksp->ks_kid = kstat_id; |
5461eefe | 553 | kstat_id++; |
f2a745c4 | 554 | mutex_exit(&kstat_module_lock); |
04a479f7 | 555 | |
5461eefe | 556 | ksp->ks_magic = KS_MAGIC; |
ffbf0e57 CP |
557 | mutex_init(&ksp->ks_private_lock, NULL, MUTEX_DEFAULT, NULL); |
558 | ksp->ks_lock = &ksp->ks_private_lock; | |
04a479f7 | 559 | INIT_LIST_HEAD(&ksp->ks_list); |
560 | ||
561 | ksp->ks_crtime = gethrtime(); | |
5461eefe | 562 | ksp->ks_snaptime = ksp->ks_crtime; |
04a479f7 | 563 | strncpy(ksp->ks_module, ks_module, KSTAT_STRLEN); |
564 | ksp->ks_instance = ks_instance; | |
565 | strncpy(ksp->ks_name, ks_name, KSTAT_STRLEN); | |
566 | strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN); | |
567 | ksp->ks_type = ks_type; | |
568 | ksp->ks_flags = ks_flags; | |
9a8b7a74 BB |
569 | ksp->ks_update = kstat_default_update; |
570 | ksp->ks_private = NULL; | |
56d40a68 PS |
571 | ksp->ks_raw_ops.headers = NULL; |
572 | ksp->ks_raw_ops.data = NULL; | |
573 | ksp->ks_raw_ops.addr = NULL; | |
574 | ksp->ks_raw_buf = NULL; | |
575 | ksp->ks_raw_bufsize = 0; | |
04a479f7 | 576 | |
577 | switch (ksp->ks_type) { | |
5461eefe BB |
578 | case KSTAT_TYPE_RAW: |
579 | ksp->ks_ndata = 1; | |
580 | ksp->ks_data_size = ks_ndata; | |
581 | break; | |
582 | case KSTAT_TYPE_NAMED: | |
583 | ksp->ks_ndata = ks_ndata; | |
584 | ksp->ks_data_size = ks_ndata * sizeof (kstat_named_t); | |
585 | break; | |
586 | case KSTAT_TYPE_INTR: | |
587 | ksp->ks_ndata = ks_ndata; | |
588 | ksp->ks_data_size = ks_ndata * sizeof (kstat_intr_t); | |
589 | break; | |
590 | case KSTAT_TYPE_IO: | |
591 | ksp->ks_ndata = ks_ndata; | |
592 | ksp->ks_data_size = ks_ndata * sizeof (kstat_io_t); | |
593 | break; | |
594 | case KSTAT_TYPE_TIMER: | |
595 | ksp->ks_ndata = ks_ndata; | |
596 | ksp->ks_data_size = ks_ndata * sizeof (kstat_timer_t); | |
597 | break; | |
598 | default: | |
599 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
600 | } | |
04a479f7 | 601 | |
602 | if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) { | |
5461eefe BB |
603 | ksp->ks_data = NULL; |
604 | } else { | |
605 | ksp->ks_data = kmem_zalloc(ksp->ks_data_size, KM_SLEEP); | |
606 | if (ksp->ks_data == NULL) { | |
607 | kmem_free(ksp, sizeof (*ksp)); | |
608 | ksp = NULL; | |
609 | } | |
610 | } | |
611 | ||
612 | return (ksp); | |
04a479f7 | 613 | } |
614 | EXPORT_SYMBOL(__kstat_create); | |
615 | ||
cd478018 L |
616 | static int |
617 | kstat_detect_collision(kstat_t *ksp) | |
618 | { | |
619 | kstat_module_t *module; | |
620 | kstat_t *tmp; | |
9df96926 | 621 | char *parent; |
cd478018 L |
622 | char *cp; |
623 | ||
9df96926 | 624 | parent = kmem_asprintf("%s", ksp->ks_module); |
cd478018 | 625 | |
9df96926 | 626 | if ((cp = strrchr(parent, '/')) == NULL) { |
627 | strfree(parent); | |
cd478018 | 628 | return (0); |
9df96926 | 629 | } |
cd478018 L |
630 | |
631 | cp[0] = '\0'; | |
632 | if ((module = kstat_find_module(parent)) != NULL) { | |
3673d032 | 633 | list_for_each_entry(tmp, &module->ksm_kstat_list, ks_list) { |
9df96926 | 634 | if (strncmp(tmp->ks_name, cp+1, KSTAT_STRLEN) == 0) { |
635 | strfree(parent); | |
cd478018 | 636 | return (EEXIST); |
9df96926 | 637 | } |
3673d032 | 638 | } |
cd478018 L |
639 | } |
640 | ||
9df96926 | 641 | strfree(parent); |
cd478018 L |
642 | return (0); |
643 | } | |
644 | ||
04a479f7 | 645 | void |
646 | __kstat_install(kstat_t *ksp) | |
647 | { | |
f2a745c4 | 648 | kstat_module_t *module; |
04a479f7 | 649 | kstat_t *tmp; |
04a479f7 | 650 | |
f2a745c4 | 651 | ASSERT(ksp); |
04a479f7 | 652 | |
f2a745c4 | 653 | mutex_enter(&kstat_module_lock); |
04a479f7 | 654 | |
f2a745c4 RY |
655 | module = kstat_find_module(ksp->ks_module); |
656 | if (module == NULL) { | |
cd478018 L |
657 | if (kstat_detect_collision(ksp) != 0) { |
658 | cmn_err(CE_WARN, "kstat_create('%s', '%s'): namespace" \ | |
659 | " collision", ksp->ks_module, ksp->ks_name); | |
660 | goto out; | |
661 | } | |
f2a745c4 RY |
662 | module = kstat_create_module(ksp->ks_module); |
663 | if (module == NULL) | |
664 | goto out; | |
04a479f7 | 665 | } |
666 | ||
f2a745c4 RY |
667 | /* |
668 | * Only one entry by this name per-module, on failure the module | |
669 | * shouldn't be deleted because we know it has at least one entry. | |
670 | */ | |
3673d032 | 671 | list_for_each_entry(tmp, &module->ksm_kstat_list, ks_list) { |
f2a745c4 RY |
672 | if (strncmp(tmp->ks_name, ksp->ks_name, KSTAT_STRLEN) == 0) |
673 | goto out; | |
3673d032 | 674 | } |
f2a745c4 RY |
675 | |
676 | list_add_tail(&ksp->ks_list, &module->ksm_kstat_list); | |
04a479f7 | 677 | |
ffbf0e57 | 678 | mutex_enter(ksp->ks_lock); |
f2a745c4 | 679 | ksp->ks_owner = module; |
56d40a68 | 680 | ksp->ks_proc = proc_create_data(ksp->ks_name, 0644, |
f2a745c4 RY |
681 | module->ksm_proc, &proc_kstat_operations, (void *)ksp); |
682 | if (ksp->ks_proc == NULL) { | |
683 | list_del_init(&ksp->ks_list); | |
684 | if (list_empty(&module->ksm_kstat_list)) | |
685 | kstat_delete_module(module); | |
686 | } | |
ffbf0e57 | 687 | mutex_exit(ksp->ks_lock); |
04a479f7 | 688 | out: |
f2a745c4 | 689 | mutex_exit(&kstat_module_lock); |
04a479f7 | 690 | } |
691 | EXPORT_SYMBOL(__kstat_install); | |
692 | ||
693 | void | |
694 | __kstat_delete(kstat_t *ksp) | |
695 | { | |
f2a745c4 | 696 | kstat_module_t *module = ksp->ks_owner; |
04a479f7 | 697 | |
f2a745c4 RY |
698 | mutex_enter(&kstat_module_lock); |
699 | list_del_init(&ksp->ks_list); | |
700 | mutex_exit(&kstat_module_lock); | |
04a479f7 | 701 | |
f2a745c4 RY |
702 | if (ksp->ks_proc) { |
703 | remove_proc_entry(ksp->ks_name, module->ksm_proc); | |
04a479f7 | 704 | |
f2a745c4 RY |
705 | /* Remove top level module directory if it's empty */ |
706 | if (list_empty(&module->ksm_kstat_list)) | |
707 | kstat_delete_module(module); | |
04a479f7 | 708 | } |
709 | ||
710 | if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL)) | |
f2a745c4 | 711 | kmem_free(ksp->ks_data, ksp->ks_data_size); |
04a479f7 | 712 | |
ffbf0e57 CP |
713 | ksp->ks_lock = NULL; |
714 | mutex_destroy(&ksp->ks_private_lock); | |
5461eefe | 715 | kmem_free(ksp, sizeof (*ksp)); |
04a479f7 | 716 | } |
717 | EXPORT_SYMBOL(__kstat_delete); | |
718 | ||
04a479f7 | 719 | int |
1114ae6a | 720 | spl_kstat_init(void) |
04a479f7 | 721 | { |
f2a745c4 RY |
722 | mutex_init(&kstat_module_lock, NULL, MUTEX_DEFAULT, NULL); |
723 | INIT_LIST_HEAD(&kstat_module_list); | |
5461eefe | 724 | kstat_id = 0; |
8d9a23e8 | 725 | return (0); |
04a479f7 | 726 | } |
727 | ||
728 | void | |
1114ae6a | 729 | spl_kstat_fini(void) |
04a479f7 | 730 | { |
f2a745c4 RY |
731 | ASSERT(list_empty(&kstat_module_list)); |
732 | mutex_destroy(&kstat_module_lock); | |
04a479f7 | 733 | } |