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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 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 | 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> |
a9125891 | 31 | #include <sys/sysmacros.h> |
04a479f7 | 32 | |
f2a745c4 RY |
33 | static kmutex_t kstat_module_lock; |
34 | static struct list_head kstat_module_list; | |
04a479f7 BB |
35 | static kid_t kstat_id; |
36 | ||
56d40a68 PS |
37 | static int |
38 | kstat_resize_raw(kstat_t *ksp) | |
39 | { | |
40 | if (ksp->ks_raw_bufsize == KSTAT_RAW_MAX) | |
5461eefe | 41 | return (ENOMEM); |
56d40a68 PS |
42 | |
43 | vmem_free(ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
44 | ksp->ks_raw_bufsize = MIN(ksp->ks_raw_bufsize * 2, KSTAT_RAW_MAX); | |
45 | ksp->ks_raw_buf = vmem_alloc(ksp->ks_raw_bufsize, KM_SLEEP); | |
46 | ||
5461eefe | 47 | return (0); |
56d40a68 PS |
48 | } |
49 | ||
f483a97a NB |
50 | void |
51 | kstat_waitq_enter(kstat_io_t *kiop) | |
52 | { | |
53 | hrtime_t new, delta; | |
54 | ulong_t wcnt; | |
55 | ||
56 | new = gethrtime(); | |
57 | delta = new - kiop->wlastupdate; | |
58 | kiop->wlastupdate = new; | |
59 | wcnt = kiop->wcnt++; | |
60 | if (wcnt != 0) { | |
61 | kiop->wlentime += delta * wcnt; | |
62 | kiop->wtime += delta; | |
63 | } | |
64 | } | |
65 | EXPORT_SYMBOL(kstat_waitq_enter); | |
66 | ||
67 | void | |
68 | kstat_waitq_exit(kstat_io_t *kiop) | |
69 | { | |
70 | hrtime_t new, delta; | |
71 | ulong_t wcnt; | |
72 | ||
73 | new = gethrtime(); | |
74 | delta = new - kiop->wlastupdate; | |
75 | kiop->wlastupdate = new; | |
76 | wcnt = kiop->wcnt--; | |
77 | ASSERT((int)wcnt > 0); | |
78 | kiop->wlentime += delta * wcnt; | |
79 | kiop->wtime += delta; | |
80 | } | |
81 | EXPORT_SYMBOL(kstat_waitq_exit); | |
82 | ||
83 | void | |
84 | kstat_runq_enter(kstat_io_t *kiop) | |
85 | { | |
86 | hrtime_t new, delta; | |
87 | ulong_t rcnt; | |
88 | ||
89 | new = gethrtime(); | |
90 | delta = new - kiop->rlastupdate; | |
91 | kiop->rlastupdate = new; | |
92 | rcnt = kiop->rcnt++; | |
93 | if (rcnt != 0) { | |
94 | kiop->rlentime += delta * rcnt; | |
95 | kiop->rtime += delta; | |
96 | } | |
97 | } | |
98 | EXPORT_SYMBOL(kstat_runq_enter); | |
99 | ||
100 | void | |
101 | kstat_runq_exit(kstat_io_t *kiop) | |
102 | { | |
103 | hrtime_t new, delta; | |
104 | ulong_t rcnt; | |
105 | ||
106 | new = gethrtime(); | |
107 | delta = new - kiop->rlastupdate; | |
108 | kiop->rlastupdate = new; | |
109 | rcnt = kiop->rcnt--; | |
110 | ASSERT((int)rcnt > 0); | |
111 | kiop->rlentime += delta * rcnt; | |
112 | kiop->rtime += delta; | |
113 | } | |
114 | EXPORT_SYMBOL(kstat_runq_exit); | |
115 | ||
56d40a68 | 116 | static int |
04a479f7 BB |
117 | kstat_seq_show_headers(struct seq_file *f) |
118 | { | |
5461eefe | 119 | kstat_t *ksp = (kstat_t *)f->private; |
56d40a68 PS |
120 | int rc = 0; |
121 | ||
5461eefe | 122 | ASSERT(ksp->ks_magic == KS_MAGIC); |
04a479f7 | 123 | |
5461eefe BB |
124 | seq_printf(f, "%d %d 0x%02x %d %d %lld %lld\n", |
125 | ksp->ks_kid, ksp->ks_type, ksp->ks_flags, | |
126 | ksp->ks_ndata, (int)ksp->ks_data_size, | |
127 | ksp->ks_crtime, ksp->ks_snaptime); | |
04a479f7 BB |
128 | |
129 | switch (ksp->ks_type) { | |
5461eefe | 130 | case KSTAT_TYPE_RAW: |
56d40a68 | 131 | restart: |
5461eefe BB |
132 | if (ksp->ks_raw_ops.headers) { |
133 | rc = ksp->ks_raw_ops.headers( | |
134 | ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
56d40a68 PS |
135 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) |
136 | goto restart; | |
137 | if (!rc) | |
5461eefe BB |
138 | seq_puts(f, ksp->ks_raw_buf); |
139 | } else { | |
140 | seq_printf(f, "raw data\n"); | |
141 | } | |
142 | break; | |
143 | case KSTAT_TYPE_NAMED: | |
144 | seq_printf(f, "%-31s %-4s %s\n", | |
145 | "name", "type", "data"); | |
146 | break; | |
147 | case KSTAT_TYPE_INTR: | |
148 | seq_printf(f, "%-8s %-8s %-8s %-8s %-8s\n", | |
149 | "hard", "soft", "watchdog", | |
150 | "spurious", "multsvc"); | |
151 | break; | |
152 | case KSTAT_TYPE_IO: | |
153 | seq_printf(f, | |
154 | "%-8s %-8s %-8s %-8s %-8s %-8s " | |
155 | "%-8s %-8s %-8s %-8s %-8s %-8s\n", | |
156 | "nread", "nwritten", "reads", "writes", | |
157 | "wtime", "wlentime", "wupdate", | |
158 | "rtime", "rlentime", "rupdate", | |
159 | "wcnt", "rcnt"); | |
160 | break; | |
161 | case KSTAT_TYPE_TIMER: | |
162 | seq_printf(f, | |
163 | "%-31s %-8s " | |
164 | "%-8s %-8s %-8s %-8s %-8s\n", | |
165 | "name", "events", "elapsed", | |
166 | "min", "max", "start", "stop"); | |
167 | break; | |
168 | default: | |
169 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
170 | } | |
171 | ||
172 | return (-rc); | |
04a479f7 BB |
173 | } |
174 | ||
175 | static int | |
176 | kstat_seq_show_raw(struct seq_file *f, unsigned char *p, int l) | |
177 | { | |
5461eefe | 178 | int i, j; |
04a479f7 | 179 | |
5461eefe BB |
180 | for (i = 0; ; i++) { |
181 | seq_printf(f, "%03x:", i); | |
04a479f7 | 182 | |
5461eefe BB |
183 | for (j = 0; j < 16; j++) { |
184 | if (i * 16 + j >= l) { | |
185 | seq_printf(f, "\n"); | |
186 | goto out; | |
187 | } | |
04a479f7 | 188 | |
5461eefe BB |
189 | seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]); |
190 | } | |
191 | seq_printf(f, "\n"); | |
192 | } | |
04a479f7 | 193 | out: |
5461eefe | 194 | return (0); |
04a479f7 BB |
195 | } |
196 | ||
197 | static int | |
198 | kstat_seq_show_named(struct seq_file *f, kstat_named_t *knp) | |
199 | { | |
5461eefe BB |
200 | seq_printf(f, "%-31s %-4d ", knp->name, knp->data_type); |
201 | ||
202 | switch (knp->data_type) { | |
203 | case KSTAT_DATA_CHAR: | |
204 | knp->value.c[15] = '\0'; /* NULL terminate */ | |
205 | seq_printf(f, "%-16s", knp->value.c); | |
206 | break; | |
207 | /* | |
208 | * NOTE - We need to be more careful able what tokens are | |
209 | * used for each arch, for now this is correct for x86_64. | |
210 | */ | |
211 | case KSTAT_DATA_INT32: | |
212 | seq_printf(f, "%d", knp->value.i32); | |
213 | break; | |
214 | case KSTAT_DATA_UINT32: | |
215 | seq_printf(f, "%u", knp->value.ui32); | |
216 | break; | |
217 | case KSTAT_DATA_INT64: | |
218 | seq_printf(f, "%lld", (signed long long)knp->value.i64); | |
219 | break; | |
220 | case KSTAT_DATA_UINT64: | |
221 | seq_printf(f, "%llu", | |
222 | (unsigned long long)knp->value.ui64); | |
223 | break; | |
224 | case KSTAT_DATA_LONG: | |
225 | seq_printf(f, "%ld", knp->value.l); | |
226 | break; | |
227 | case KSTAT_DATA_ULONG: | |
228 | seq_printf(f, "%lu", knp->value.ul); | |
229 | break; | |
230 | case KSTAT_DATA_STRING: | |
231 | KSTAT_NAMED_STR_PTR(knp) | |
232 | [KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0'; | |
233 | seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp)); | |
234 | break; | |
235 | default: | |
236 | PANIC("Undefined kstat data type %d\n", knp->data_type); | |
237 | } | |
238 | ||
239 | seq_printf(f, "\n"); | |
240 | ||
241 | return (0); | |
04a479f7 BB |
242 | } |
243 | ||
244 | static int | |
245 | kstat_seq_show_intr(struct seq_file *f, kstat_intr_t *kip) | |
246 | { | |
5461eefe BB |
247 | seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n", |
248 | kip->intrs[KSTAT_INTR_HARD], | |
249 | kip->intrs[KSTAT_INTR_SOFT], | |
250 | kip->intrs[KSTAT_INTR_WATCHDOG], | |
251 | kip->intrs[KSTAT_INTR_SPURIOUS], | |
252 | kip->intrs[KSTAT_INTR_MULTSVC]); | |
253 | ||
254 | return (0); | |
04a479f7 BB |
255 | } |
256 | ||
257 | static int | |
258 | kstat_seq_show_io(struct seq_file *f, kstat_io_t *kip) | |
259 | { | |
a48cd034 | 260 | /* though wlentime & friends are signed, they will never be negative */ |
5461eefe | 261 | seq_printf(f, |
a48cd034 RE |
262 | "%-8llu %-8llu %-8u %-8u %-8llu %-8llu " |
263 | "%-8llu %-8llu %-8llu %-8llu %-8u %-8u\n", | |
5461eefe BB |
264 | kip->nread, kip->nwritten, |
265 | kip->reads, kip->writes, | |
266 | kip->wtime, kip->wlentime, kip->wlastupdate, | |
267 | kip->rtime, kip->rlentime, kip->rlastupdate, | |
268 | kip->wcnt, kip->rcnt); | |
269 | ||
270 | return (0); | |
04a479f7 BB |
271 | } |
272 | ||
273 | static int | |
274 | kstat_seq_show_timer(struct seq_file *f, kstat_timer_t *ktp) | |
275 | { | |
5461eefe | 276 | seq_printf(f, |
a48cd034 | 277 | "%-31s %-8llu %-8llu %-8llu %-8llu %-8llu %-8llu\n", |
5461eefe BB |
278 | ktp->name, ktp->num_events, ktp->elapsed_time, |
279 | ktp->min_time, ktp->max_time, | |
280 | ktp->start_time, ktp->stop_time); | |
04a479f7 | 281 | |
5461eefe | 282 | return (0); |
04a479f7 BB |
283 | } |
284 | ||
285 | static int | |
286 | kstat_seq_show(struct seq_file *f, void *p) | |
287 | { | |
5461eefe BB |
288 | kstat_t *ksp = (kstat_t *)f->private; |
289 | int rc = 0; | |
04a479f7 | 290 | |
5461eefe | 291 | ASSERT(ksp->ks_magic == KS_MAGIC); |
04a479f7 BB |
292 | |
293 | switch (ksp->ks_type) { | |
5461eefe | 294 | case KSTAT_TYPE_RAW: |
56d40a68 | 295 | restart: |
5461eefe BB |
296 | if (ksp->ks_raw_ops.data) { |
297 | rc = ksp->ks_raw_ops.data( | |
56d40a68 PS |
298 | ksp->ks_raw_buf, ksp->ks_raw_bufsize, p); |
299 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) | |
300 | goto restart; | |
301 | if (!rc) | |
5461eefe BB |
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, | |
3673d032 | 306 | ksp->ks_data_size); |
5461eefe BB |
307 | } |
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: | |
322 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
323 | } | |
324 | ||
325 | return (-rc); | |
04a479f7 BB |
326 | } |
327 | ||
68386b05 | 328 | static int |
9a8b7a74 BB |
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 | ||
5461eefe | 336 | return (0); |
9a8b7a74 BB |
337 | } |
338 | ||
04a479f7 BB |
339 | static void * |
340 | kstat_seq_data_addr(kstat_t *ksp, loff_t n) | |
341 | { | |
5461eefe | 342 | void *rc = NULL; |
04a479f7 BB |
343 | |
344 | switch (ksp->ks_type) { | |
5461eefe BB |
345 | case KSTAT_TYPE_RAW: |
346 | if (ksp->ks_raw_ops.addr) | |
347 | rc = ksp->ks_raw_ops.addr(ksp, n); | |
348 | else | |
349 | rc = ksp->ks_data; | |
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: | |
364 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
365 | } | |
366 | ||
367 | return (rc); | |
04a479f7 BB |
368 | } |
369 | ||
370 | static void * | |
371 | kstat_seq_start(struct seq_file *f, loff_t *pos) | |
372 | { | |
5461eefe BB |
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 | |
5461eefe BB |
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 | } | |
56d40a68 | 383 | |
5461eefe BB |
384 | /* Dynamically update kstat, on error existing kstats are used */ |
385 | (void) ksp->ks_update(ksp, KSTAT_READ); | |
9a8b7a74 | 386 | |
04a479f7 BB |
387 | ksp->ks_snaptime = gethrtime(); |
388 | ||
f0ed6c74 TH |
389 | if (!(ksp->ks_flags & KSTAT_FLAG_NO_HEADERS) && !n && |
390 | kstat_seq_show_headers(f)) | |
8d9a23e8 | 391 | return (NULL); |
04a479f7 | 392 | |
5461eefe BB |
393 | if (n >= ksp->ks_ndata) |
394 | return (NULL); | |
04a479f7 | 395 | |
5461eefe | 396 | return (kstat_seq_data_addr(ksp, n)); |
04a479f7 BB |
397 | } |
398 | ||
399 | static void * | |
400 | kstat_seq_next(struct seq_file *f, void *p, loff_t *pos) | |
401 | { | |
5461eefe BB |
402 | kstat_t *ksp = (kstat_t *)f->private; |
403 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 404 | |
5461eefe BB |
405 | ++*pos; |
406 | if (*pos >= ksp->ks_ndata) | |
407 | return (NULL); | |
04a479f7 | 408 | |
5461eefe | 409 | return (kstat_seq_data_addr(ksp, *pos)); |
04a479f7 BB |
410 | } |
411 | ||
412 | static void | |
413 | kstat_seq_stop(struct seq_file *f, void *v) | |
414 | { | |
ffbf0e57 CP |
415 | kstat_t *ksp = (kstat_t *)f->private; |
416 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 417 | |
56d40a68 PS |
418 | if (ksp->ks_type == KSTAT_TYPE_RAW) |
419 | vmem_free(ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
420 | ||
ffbf0e57 | 421 | mutex_exit(ksp->ks_lock); |
04a479f7 BB |
422 | } |
423 | ||
424 | static struct seq_operations kstat_seq_ops = { | |
5461eefe BB |
425 | .show = kstat_seq_show, |
426 | .start = kstat_seq_start, | |
427 | .next = kstat_seq_next, | |
428 | .stop = kstat_seq_stop, | |
04a479f7 BB |
429 | }; |
430 | ||
f2a745c4 RY |
431 | static kstat_module_t * |
432 | kstat_find_module(char *name) | |
433 | { | |
434 | kstat_module_t *module; | |
435 | ||
3673d032 | 436 | list_for_each_entry(module, &kstat_module_list, ksm_module_list) { |
f2a745c4 RY |
437 | if (strncmp(name, module->ksm_name, KSTAT_STRLEN) == 0) |
438 | return (module); | |
3673d032 | 439 | } |
f2a745c4 RY |
440 | |
441 | return (NULL); | |
442 | } | |
443 | ||
444 | static kstat_module_t * | |
445 | kstat_create_module(char *name) | |
446 | { | |
447 | kstat_module_t *module; | |
448 | struct proc_dir_entry *pde; | |
449 | ||
450 | pde = proc_mkdir(name, proc_spl_kstat); | |
451 | if (pde == NULL) | |
452 | return (NULL); | |
453 | ||
454 | module = kmem_alloc(sizeof (kstat_module_t), KM_SLEEP); | |
455 | module->ksm_proc = pde; | |
456 | strlcpy(module->ksm_name, name, KSTAT_STRLEN+1); | |
457 | INIT_LIST_HEAD(&module->ksm_kstat_list); | |
458 | list_add_tail(&module->ksm_module_list, &kstat_module_list); | |
459 | ||
460 | return (module); | |
461 | ||
462 | } | |
463 | ||
464 | static void | |
465 | kstat_delete_module(kstat_module_t *module) | |
466 | { | |
467 | ASSERT(list_empty(&module->ksm_kstat_list)); | |
468 | remove_proc_entry(module->ksm_name, proc_spl_kstat); | |
469 | list_del(&module->ksm_module_list); | |
5461eefe | 470 | kmem_free(module, sizeof (kstat_module_t)); |
f2a745c4 RY |
471 | } |
472 | ||
04a479f7 BB |
473 | static int |
474 | proc_kstat_open(struct inode *inode, struct file *filp) | |
475 | { | |
5461eefe BB |
476 | struct seq_file *f; |
477 | int rc; | |
04a479f7 | 478 | |
5461eefe BB |
479 | rc = seq_open(filp, &kstat_seq_ops); |
480 | if (rc) | |
481 | return (rc); | |
04a479f7 | 482 | |
5461eefe BB |
483 | f = filp->private_data; |
484 | f->private = PDE_DATA(inode); | |
04a479f7 | 485 | |
5461eefe | 486 | return (rc); |
04a479f7 BB |
487 | } |
488 | ||
56d40a68 | 489 | static ssize_t |
5461eefe BB |
490 | proc_kstat_write(struct file *filp, const char __user *buf, size_t len, |
491 | loff_t *ppos) | |
56d40a68 PS |
492 | { |
493 | struct seq_file *f = filp->private_data; | |
494 | kstat_t *ksp = f->private; | |
495 | int rc; | |
496 | ||
497 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
498 | ||
499 | mutex_enter(ksp->ks_lock); | |
500 | rc = ksp->ks_update(ksp, KSTAT_WRITE); | |
501 | mutex_exit(ksp->ks_lock); | |
502 | ||
503 | if (rc) | |
504 | return (-rc); | |
505 | ||
506 | *ppos += len; | |
507 | return (len); | |
508 | } | |
509 | ||
04a479f7 | 510 | static struct file_operations proc_kstat_operations = { |
56d40a68 PS |
511 | .open = proc_kstat_open, |
512 | .write = proc_kstat_write, | |
513 | .read = seq_read, | |
514 | .llseek = seq_lseek, | |
515 | .release = seq_release, | |
04a479f7 BB |
516 | }; |
517 | ||
56d40a68 PS |
518 | void |
519 | __kstat_set_raw_ops(kstat_t *ksp, | |
3673d032 BB |
520 | int (*headers)(char *buf, size_t size), |
521 | int (*data)(char *buf, size_t size, void *data), | |
522 | void *(*addr)(kstat_t *ksp, loff_t index)) | |
56d40a68 PS |
523 | { |
524 | ksp->ks_raw_ops.headers = headers; | |
525 | ksp->ks_raw_ops.data = data; | |
526 | ksp->ks_raw_ops.addr = addr; | |
527 | } | |
528 | EXPORT_SYMBOL(__kstat_set_raw_ops); | |
529 | ||
d1261452 JG |
530 | void |
531 | kstat_proc_entry_init(kstat_proc_entry_t *kpep, const char *module, | |
532 | const char *name) | |
533 | { | |
534 | kpep->kpe_owner = NULL; | |
535 | kpep->kpe_proc = NULL; | |
536 | INIT_LIST_HEAD(&kpep->kpe_list); | |
537 | strncpy(kpep->kpe_module, module, KSTAT_STRLEN); | |
538 | strncpy(kpep->kpe_name, name, KSTAT_STRLEN); | |
539 | } | |
540 | EXPORT_SYMBOL(kstat_proc_entry_init); | |
541 | ||
04a479f7 BB |
542 | kstat_t * |
543 | __kstat_create(const char *ks_module, int ks_instance, const char *ks_name, | |
5461eefe BB |
544 | const char *ks_class, uchar_t ks_type, uint_t ks_ndata, |
545 | uchar_t ks_flags) | |
04a479f7 BB |
546 | { |
547 | kstat_t *ksp; | |
548 | ||
549 | ASSERT(ks_module); | |
550 | ASSERT(ks_instance == 0); | |
551 | ASSERT(ks_name); | |
04a479f7 BB |
552 | |
553 | if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO)) | |
5461eefe | 554 | ASSERT(ks_ndata == 1); |
04a479f7 | 555 | |
5461eefe | 556 | ksp = kmem_zalloc(sizeof (*ksp), KM_SLEEP); |
04a479f7 | 557 | if (ksp == NULL) |
5461eefe | 558 | return (ksp); |
04a479f7 | 559 | |
f2a745c4 | 560 | mutex_enter(&kstat_module_lock); |
04a479f7 | 561 | ksp->ks_kid = kstat_id; |
5461eefe | 562 | kstat_id++; |
f2a745c4 | 563 | mutex_exit(&kstat_module_lock); |
04a479f7 | 564 | |
5461eefe | 565 | ksp->ks_magic = KS_MAGIC; |
ffbf0e57 CP |
566 | mutex_init(&ksp->ks_private_lock, NULL, MUTEX_DEFAULT, NULL); |
567 | ksp->ks_lock = &ksp->ks_private_lock; | |
04a479f7 BB |
568 | |
569 | ksp->ks_crtime = gethrtime(); | |
5461eefe | 570 | ksp->ks_snaptime = ksp->ks_crtime; |
04a479f7 | 571 | ksp->ks_instance = ks_instance; |
04a479f7 BB |
572 | strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN); |
573 | ksp->ks_type = ks_type; | |
574 | ksp->ks_flags = ks_flags; | |
9a8b7a74 BB |
575 | ksp->ks_update = kstat_default_update; |
576 | ksp->ks_private = NULL; | |
56d40a68 PS |
577 | ksp->ks_raw_ops.headers = NULL; |
578 | ksp->ks_raw_ops.data = NULL; | |
579 | ksp->ks_raw_ops.addr = NULL; | |
580 | ksp->ks_raw_buf = NULL; | |
581 | ksp->ks_raw_bufsize = 0; | |
d1261452 | 582 | kstat_proc_entry_init(&ksp->ks_proc, ks_module, ks_name); |
04a479f7 BB |
583 | |
584 | switch (ksp->ks_type) { | |
5461eefe BB |
585 | case KSTAT_TYPE_RAW: |
586 | ksp->ks_ndata = 1; | |
587 | ksp->ks_data_size = ks_ndata; | |
588 | break; | |
589 | case KSTAT_TYPE_NAMED: | |
590 | ksp->ks_ndata = ks_ndata; | |
591 | ksp->ks_data_size = ks_ndata * sizeof (kstat_named_t); | |
592 | break; | |
593 | case KSTAT_TYPE_INTR: | |
594 | ksp->ks_ndata = ks_ndata; | |
595 | ksp->ks_data_size = ks_ndata * sizeof (kstat_intr_t); | |
596 | break; | |
597 | case KSTAT_TYPE_IO: | |
598 | ksp->ks_ndata = ks_ndata; | |
599 | ksp->ks_data_size = ks_ndata * sizeof (kstat_io_t); | |
600 | break; | |
601 | case KSTAT_TYPE_TIMER: | |
602 | ksp->ks_ndata = ks_ndata; | |
603 | ksp->ks_data_size = ks_ndata * sizeof (kstat_timer_t); | |
604 | break; | |
605 | default: | |
606 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
607 | } | |
04a479f7 BB |
608 | |
609 | if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) { | |
5461eefe BB |
610 | ksp->ks_data = NULL; |
611 | } else { | |
612 | ksp->ks_data = kmem_zalloc(ksp->ks_data_size, KM_SLEEP); | |
613 | if (ksp->ks_data == NULL) { | |
614 | kmem_free(ksp, sizeof (*ksp)); | |
615 | ksp = NULL; | |
616 | } | |
617 | } | |
618 | ||
619 | return (ksp); | |
04a479f7 BB |
620 | } |
621 | EXPORT_SYMBOL(__kstat_create); | |
622 | ||
cd478018 | 623 | static int |
d1261452 | 624 | kstat_detect_collision(kstat_proc_entry_t *kpep) |
cd478018 | 625 | { |
626 | kstat_module_t *module; | |
d1261452 | 627 | kstat_proc_entry_t *tmp; |
9df96926 | 628 | char *parent; |
cd478018 | 629 | char *cp; |
630 | ||
d1261452 | 631 | parent = kmem_asprintf("%s", kpep->kpe_module); |
cd478018 | 632 | |
9df96926 GK |
633 | if ((cp = strrchr(parent, '/')) == NULL) { |
634 | strfree(parent); | |
cd478018 | 635 | return (0); |
9df96926 | 636 | } |
cd478018 | 637 | |
638 | cp[0] = '\0'; | |
639 | if ((module = kstat_find_module(parent)) != NULL) { | |
d1261452 JG |
640 | list_for_each_entry(tmp, &module->ksm_kstat_list, kpe_list) { |
641 | if (strncmp(tmp->kpe_name, cp+1, KSTAT_STRLEN) == 0) { | |
9df96926 | 642 | strfree(parent); |
cd478018 | 643 | return (EEXIST); |
9df96926 | 644 | } |
3673d032 | 645 | } |
cd478018 | 646 | } |
647 | ||
9df96926 | 648 | strfree(parent); |
cd478018 | 649 | return (0); |
650 | } | |
651 | ||
d1261452 JG |
652 | /* |
653 | * Add a file to the proc filesystem under the kstat namespace (i.e. | |
654 | * /proc/spl/kstat/). The file need not necessarily be implemented as a | |
655 | * kstat. | |
656 | */ | |
04a479f7 | 657 | void |
a887d653 | 658 | kstat_proc_entry_install(kstat_proc_entry_t *kpep, mode_t mode, |
d1261452 | 659 | const struct file_operations *file_ops, void *data) |
04a479f7 | 660 | { |
f2a745c4 | 661 | kstat_module_t *module; |
d1261452 | 662 | kstat_proc_entry_t *tmp; |
04a479f7 | 663 | |
d1261452 | 664 | ASSERT(kpep); |
04a479f7 | 665 | |
f2a745c4 | 666 | mutex_enter(&kstat_module_lock); |
04a479f7 | 667 | |
d1261452 | 668 | module = kstat_find_module(kpep->kpe_module); |
f2a745c4 | 669 | if (module == NULL) { |
d1261452 | 670 | if (kstat_detect_collision(kpep) != 0) { |
cd478018 | 671 | cmn_err(CE_WARN, "kstat_create('%s', '%s'): namespace" \ |
d1261452 | 672 | " collision", kpep->kpe_module, kpep->kpe_name); |
cd478018 | 673 | goto out; |
674 | } | |
d1261452 | 675 | module = kstat_create_module(kpep->kpe_module); |
f2a745c4 RY |
676 | if (module == NULL) |
677 | goto out; | |
04a479f7 BB |
678 | } |
679 | ||
f2a745c4 RY |
680 | /* |
681 | * Only one entry by this name per-module, on failure the module | |
682 | * shouldn't be deleted because we know it has at least one entry. | |
683 | */ | |
d1261452 JG |
684 | list_for_each_entry(tmp, &module->ksm_kstat_list, kpe_list) { |
685 | if (strncmp(tmp->kpe_name, kpep->kpe_name, KSTAT_STRLEN) == 0) | |
f2a745c4 | 686 | goto out; |
3673d032 | 687 | } |
f2a745c4 | 688 | |
d1261452 | 689 | list_add_tail(&kpep->kpe_list, &module->ksm_kstat_list); |
04a479f7 | 690 | |
d1261452 | 691 | kpep->kpe_owner = module; |
a887d653 | 692 | kpep->kpe_proc = proc_create_data(kpep->kpe_name, mode, |
d1261452 JG |
693 | module->ksm_proc, file_ops, data); |
694 | if (kpep->kpe_proc == NULL) { | |
695 | list_del_init(&kpep->kpe_list); | |
f2a745c4 RY |
696 | if (list_empty(&module->ksm_kstat_list)) |
697 | kstat_delete_module(module); | |
698 | } | |
04a479f7 | 699 | out: |
f2a745c4 | 700 | mutex_exit(&kstat_module_lock); |
d1261452 JG |
701 | |
702 | } | |
703 | EXPORT_SYMBOL(kstat_proc_entry_install); | |
704 | ||
705 | void | |
706 | __kstat_install(kstat_t *ksp) | |
707 | { | |
708 | ASSERT(ksp); | |
a887d653 SH |
709 | mode_t mode; |
710 | /* Specify permission modes for different kstats */ | |
711 | if (strncmp(ksp->ks_proc.kpe_name, "dbufs", KSTAT_STRLEN) == 0) { | |
712 | mode = 0600; | |
713 | } else { | |
714 | mode = 0644; | |
715 | } | |
716 | kstat_proc_entry_install( | |
717 | &ksp->ks_proc, mode, &proc_kstat_operations, ksp); | |
04a479f7 BB |
718 | } |
719 | EXPORT_SYMBOL(__kstat_install); | |
720 | ||
721 | void | |
d1261452 | 722 | kstat_proc_entry_delete(kstat_proc_entry_t *kpep) |
04a479f7 | 723 | { |
d1261452 JG |
724 | kstat_module_t *module = kpep->kpe_owner; |
725 | if (kpep->kpe_proc) | |
726 | remove_proc_entry(kpep->kpe_name, module->ksm_proc); | |
04a479f7 | 727 | |
f2a745c4 | 728 | mutex_enter(&kstat_module_lock); |
d1261452 JG |
729 | list_del_init(&kpep->kpe_list); |
730 | ||
731 | /* | |
732 | * Remove top level module directory if it wasn't empty before, but now | |
733 | * is. | |
734 | */ | |
735 | if (kpep->kpe_proc && list_empty(&module->ksm_kstat_list)) | |
736 | kstat_delete_module(module); | |
f2a745c4 | 737 | mutex_exit(&kstat_module_lock); |
04a479f7 | 738 | |
d1261452 JG |
739 | } |
740 | EXPORT_SYMBOL(kstat_proc_entry_delete); | |
04a479f7 | 741 | |
d1261452 JG |
742 | void |
743 | __kstat_delete(kstat_t *ksp) | |
744 | { | |
745 | kstat_proc_entry_delete(&ksp->ks_proc); | |
04a479f7 BB |
746 | |
747 | if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL)) | |
f2a745c4 | 748 | kmem_free(ksp->ks_data, ksp->ks_data_size); |
04a479f7 | 749 | |
ffbf0e57 CP |
750 | ksp->ks_lock = NULL; |
751 | mutex_destroy(&ksp->ks_private_lock); | |
5461eefe | 752 | kmem_free(ksp, sizeof (*ksp)); |
04a479f7 BB |
753 | } |
754 | EXPORT_SYMBOL(__kstat_delete); | |
755 | ||
04a479f7 | 756 | int |
1114ae6a | 757 | spl_kstat_init(void) |
04a479f7 | 758 | { |
f2a745c4 RY |
759 | mutex_init(&kstat_module_lock, NULL, MUTEX_DEFAULT, NULL); |
760 | INIT_LIST_HEAD(&kstat_module_list); | |
5461eefe | 761 | kstat_id = 0; |
8d9a23e8 | 762 | return (0); |
04a479f7 BB |
763 | } |
764 | ||
765 | void | |
1114ae6a | 766 | spl_kstat_fini(void) |
04a479f7 | 767 | { |
f2a745c4 RY |
768 | ASSERT(list_empty(&kstat_module_list)); |
769 | mutex_destroy(&kstat_module_lock); | |
04a479f7 | 770 | } |