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716154c5 BB |
1 | /*****************************************************************************\ |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
715f6251 | 6 | * UCRL-CODE-235197 |
7 | * | |
716154c5 | 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/>. |
34ee731f | 23 | * |
716154c5 BB |
24 | * Solaris Porting Layer (SPL) Kstat Implementation. |
25 | \*****************************************************************************/ | |
715f6251 | 26 | |
ae4c36ad | 27 | #include <linux/seq_file.h> |
55abb092 | 28 | #include <sys/kstat.h> |
10946b02 | 29 | #include <sys/vmem.h> |
ec06701b | 30 | #include <sys/cmn_err.h> |
04a479f7 | 31 | |
80093b6f | 32 | #ifndef HAVE_PDE_DATA |
34ee731f | 33 | #define PDE_DATA(x) (PDE(x)->data) |
80093b6f | 34 | #endif |
b17edc10 | 35 | |
80093b6f AX |
36 | static kmutex_t kstat_module_lock; |
37 | static struct list_head kstat_module_list; | |
04a479f7 | 38 | static kid_t kstat_id; |
39 | ||
33a20369 LG |
40 | static int |
41 | kstat_resize_raw(kstat_t *ksp) | |
42 | { | |
43 | if (ksp->ks_raw_bufsize == KSTAT_RAW_MAX) | |
34ee731f | 44 | return (ENOMEM); |
33a20369 LG |
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 | ||
34ee731f | 50 | return (0); |
33a20369 LG |
51 | } |
52 | ||
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 | ||
119 | static int | |
04a479f7 | 120 | kstat_seq_show_headers(struct seq_file *f) |
121 | { | |
34ee731f | 122 | kstat_t *ksp = (kstat_t *)f->private; |
33a20369 LG |
123 | int rc = 0; |
124 | ||
34ee731f | 125 | ASSERT(ksp->ks_magic == KS_MAGIC); |
04a479f7 | 126 | |
34ee731f AX |
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); | |
04a479f7 | 131 | |
132 | switch (ksp->ks_type) { | |
34ee731f | 133 | case KSTAT_TYPE_RAW: |
33a20369 | 134 | restart: |
34ee731f AX |
135 | if (ksp->ks_raw_ops.headers) { |
136 | rc = ksp->ks_raw_ops.headers( | |
137 | ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
33a20369 LG |
138 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) |
139 | goto restart; | |
140 | if (!rc) | |
34ee731f AX |
141 | seq_puts(f, ksp->ks_raw_buf); |
142 | } else { | |
143 | seq_printf(f, "raw data\n"); | |
144 | } | |
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: | |
172 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
173 | } | |
174 | ||
175 | return (-rc); | |
04a479f7 | 176 | } |
177 | ||
178 | static int | |
179 | kstat_seq_show_raw(struct seq_file *f, unsigned char *p, int l) | |
180 | { | |
34ee731f | 181 | int i, j; |
04a479f7 | 182 | |
34ee731f AX |
183 | for (i = 0; ; i++) { |
184 | seq_printf(f, "%03x:", i); | |
04a479f7 | 185 | |
34ee731f AX |
186 | for (j = 0; j < 16; j++) { |
187 | if (i * 16 + j >= l) { | |
188 | seq_printf(f, "\n"); | |
189 | goto out; | |
190 | } | |
04a479f7 | 191 | |
34ee731f AX |
192 | seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]); |
193 | } | |
194 | seq_printf(f, "\n"); | |
195 | } | |
04a479f7 | 196 | out: |
34ee731f | 197 | return (0); |
04a479f7 | 198 | } |
199 | ||
200 | static int | |
201 | kstat_seq_show_named(struct seq_file *f, kstat_named_t *knp) | |
202 | { | |
34ee731f AX |
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 | /* | |
211 | * NOTE - We need to be more careful able what tokens are | |
212 | * used for each arch, for now this is correct for x86_64. | |
213 | */ | |
214 | case KSTAT_DATA_INT32: | |
215 | seq_printf(f, "%d", knp->value.i32); | |
216 | break; | |
217 | case KSTAT_DATA_UINT32: | |
218 | seq_printf(f, "%u", knp->value.ui32); | |
219 | break; | |
220 | case KSTAT_DATA_INT64: | |
221 | seq_printf(f, "%lld", (signed long long)knp->value.i64); | |
222 | break; | |
223 | case KSTAT_DATA_UINT64: | |
224 | seq_printf(f, "%llu", | |
225 | (unsigned long long)knp->value.ui64); | |
226 | break; | |
227 | case KSTAT_DATA_LONG: | |
228 | seq_printf(f, "%ld", knp->value.l); | |
229 | break; | |
230 | case KSTAT_DATA_ULONG: | |
231 | seq_printf(f, "%lu", knp->value.ul); | |
232 | break; | |
233 | case KSTAT_DATA_STRING: | |
234 | KSTAT_NAMED_STR_PTR(knp) | |
235 | [KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0'; | |
236 | seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp)); | |
237 | break; | |
238 | default: | |
239 | PANIC("Undefined kstat data type %d\n", knp->data_type); | |
240 | } | |
241 | ||
242 | seq_printf(f, "\n"); | |
243 | ||
244 | return (0); | |
04a479f7 | 245 | } |
246 | ||
247 | static int | |
248 | kstat_seq_show_intr(struct seq_file *f, kstat_intr_t *kip) | |
249 | { | |
34ee731f AX |
250 | seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n", |
251 | kip->intrs[KSTAT_INTR_HARD], | |
252 | kip->intrs[KSTAT_INTR_SOFT], | |
253 | kip->intrs[KSTAT_INTR_WATCHDOG], | |
254 | kip->intrs[KSTAT_INTR_SPURIOUS], | |
255 | kip->intrs[KSTAT_INTR_MULTSVC]); | |
256 | ||
257 | return (0); | |
04a479f7 | 258 | } |
259 | ||
260 | static int | |
261 | kstat_seq_show_io(struct seq_file *f, kstat_io_t *kip) | |
262 | { | |
34ee731f AX |
263 | seq_printf(f, |
264 | "%-8llu %-8llu %-8u %-8u %-8lld %-8lld " | |
265 | "%-8lld %-8lld %-8lld %-8lld %-8u %-8u\n", | |
266 | kip->nread, kip->nwritten, | |
267 | kip->reads, kip->writes, | |
268 | kip->wtime, kip->wlentime, kip->wlastupdate, | |
269 | kip->rtime, kip->rlentime, kip->rlastupdate, | |
270 | kip->wcnt, kip->rcnt); | |
271 | ||
272 | return (0); | |
04a479f7 | 273 | } |
274 | ||
275 | static int | |
276 | kstat_seq_show_timer(struct seq_file *f, kstat_timer_t *ktp) | |
277 | { | |
34ee731f AX |
278 | seq_printf(f, |
279 | "%-31s %-8llu %-8lld %-8lld %-8lld %-8lld %-8lld\n", | |
280 | ktp->name, ktp->num_events, ktp->elapsed_time, | |
281 | ktp->min_time, ktp->max_time, | |
282 | ktp->start_time, ktp->stop_time); | |
04a479f7 | 283 | |
34ee731f | 284 | return (0); |
04a479f7 | 285 | } |
286 | ||
287 | static int | |
288 | kstat_seq_show(struct seq_file *f, void *p) | |
289 | { | |
34ee731f AX |
290 | kstat_t *ksp = (kstat_t *)f->private; |
291 | int rc = 0; | |
04a479f7 | 292 | |
34ee731f | 293 | ASSERT(ksp->ks_magic == KS_MAGIC); |
04a479f7 | 294 | |
295 | switch (ksp->ks_type) { | |
34ee731f | 296 | case KSTAT_TYPE_RAW: |
33a20369 | 297 | restart: |
34ee731f AX |
298 | if (ksp->ks_raw_ops.data) { |
299 | rc = ksp->ks_raw_ops.data( | |
33a20369 LG |
300 | ksp->ks_raw_buf, ksp->ks_raw_bufsize, p); |
301 | if (rc == ENOMEM && !kstat_resize_raw(ksp)) | |
302 | goto restart; | |
303 | if (!rc) | |
34ee731f AX |
304 | seq_puts(f, ksp->ks_raw_buf); |
305 | } else { | |
306 | ASSERT(ksp->ks_ndata == 1); | |
307 | rc = kstat_seq_show_raw(f, ksp->ks_data, | |
308 | ksp->ks_data_size); | |
309 | } | |
310 | break; | |
311 | case KSTAT_TYPE_NAMED: | |
312 | rc = kstat_seq_show_named(f, (kstat_named_t *)p); | |
313 | break; | |
314 | case KSTAT_TYPE_INTR: | |
315 | rc = kstat_seq_show_intr(f, (kstat_intr_t *)p); | |
316 | break; | |
317 | case KSTAT_TYPE_IO: | |
318 | rc = kstat_seq_show_io(f, (kstat_io_t *)p); | |
319 | break; | |
320 | case KSTAT_TYPE_TIMER: | |
321 | rc = kstat_seq_show_timer(f, (kstat_timer_t *)p); | |
322 | break; | |
323 | default: | |
324 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
325 | } | |
326 | ||
327 | return (-rc); | |
04a479f7 | 328 | } |
329 | ||
34ee731f | 330 | static int |
9a8b7a74 BB |
331 | kstat_default_update(kstat_t *ksp, int rw) |
332 | { | |
333 | ASSERT(ksp != NULL); | |
33a20369 LG |
334 | |
335 | if (rw == KSTAT_WRITE) | |
336 | return (EACCES); | |
337 | ||
34ee731f | 338 | return (0); |
9a8b7a74 BB |
339 | } |
340 | ||
04a479f7 | 341 | static void * |
342 | kstat_seq_data_addr(kstat_t *ksp, loff_t n) | |
343 | { | |
34ee731f | 344 | void *rc = NULL; |
04a479f7 | 345 | |
346 | switch (ksp->ks_type) { | |
34ee731f AX |
347 | case KSTAT_TYPE_RAW: |
348 | if (ksp->ks_raw_ops.addr) | |
349 | rc = ksp->ks_raw_ops.addr(ksp, n); | |
350 | else | |
351 | rc = ksp->ks_data; | |
352 | break; | |
353 | case KSTAT_TYPE_NAMED: | |
354 | rc = ksp->ks_data + n * sizeof (kstat_named_t); | |
355 | break; | |
356 | case KSTAT_TYPE_INTR: | |
357 | rc = ksp->ks_data + n * sizeof (kstat_intr_t); | |
358 | break; | |
359 | case KSTAT_TYPE_IO: | |
360 | rc = ksp->ks_data + n * sizeof (kstat_io_t); | |
361 | break; | |
362 | case KSTAT_TYPE_TIMER: | |
363 | rc = ksp->ks_data + n * sizeof (kstat_timer_t); | |
364 | break; | |
365 | default: | |
366 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
367 | } | |
368 | ||
369 | return (rc); | |
04a479f7 | 370 | } |
371 | ||
372 | static void * | |
373 | kstat_seq_start(struct seq_file *f, loff_t *pos) | |
374 | { | |
34ee731f AX |
375 | loff_t n = *pos; |
376 | kstat_t *ksp = (kstat_t *)f->private; | |
377 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 378 | |
33a20369 LG |
379 | mutex_enter(ksp->ks_lock); |
380 | ||
34ee731f AX |
381 | if (ksp->ks_type == KSTAT_TYPE_RAW) { |
382 | ksp->ks_raw_bufsize = PAGE_SIZE; | |
383 | ksp->ks_raw_buf = vmem_alloc(ksp->ks_raw_bufsize, KM_SLEEP); | |
384 | } | |
71c9f0b0 | 385 | |
34ee731f AX |
386 | /* Dynamically update kstat, on error existing kstats are used */ |
387 | (void) ksp->ks_update(ksp, KSTAT_READ); | |
9a8b7a74 | 388 | |
04a479f7 | 389 | ksp->ks_snaptime = gethrtime(); |
390 | ||
b97c7791 MZ |
391 | if (!(ksp->ks_flags & KSTAT_FLAG_NO_HEADERS) && !n && |
392 | kstat_seq_show_headers(f)) | |
10946b02 | 393 | return (NULL); |
04a479f7 | 394 | |
34ee731f AX |
395 | if (n >= ksp->ks_ndata) |
396 | return (NULL); | |
04a479f7 | 397 | |
34ee731f | 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 | { | |
34ee731f AX |
404 | kstat_t *ksp = (kstat_t *)f->private; |
405 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
04a479f7 | 406 | |
34ee731f AX |
407 | ++*pos; |
408 | if (*pos >= ksp->ks_ndata) | |
409 | return (NULL); | |
04a479f7 | 410 | |
34ee731f | 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 | { | |
33a20369 LG |
417 | kstat_t *ksp = (kstat_t *)f->private; |
418 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
419 | ||
420 | if (ksp->ks_type == KSTAT_TYPE_RAW) | |
421 | vmem_free(ksp->ks_raw_buf, ksp->ks_raw_bufsize); | |
04a479f7 | 422 | |
33a20369 | 423 | mutex_exit(ksp->ks_lock); |
04a479f7 | 424 | } |
425 | ||
426 | static struct seq_operations kstat_seq_ops = { | |
34ee731f AX |
427 | .show = kstat_seq_show, |
428 | .start = kstat_seq_start, | |
429 | .next = kstat_seq_next, | |
430 | .stop = kstat_seq_stop, | |
04a479f7 | 431 | }; |
432 | ||
80093b6f AX |
433 | static kstat_module_t * |
434 | kstat_find_module(char *name) | |
435 | { | |
436 | kstat_module_t *module; | |
437 | ||
34ee731f | 438 | list_for_each_entry(module, &kstat_module_list, ksm_module_list) { |
80093b6f AX |
439 | if (strncmp(name, module->ksm_name, KSTAT_STRLEN) == 0) |
440 | return (module); | |
34ee731f | 441 | } |
80093b6f AX |
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); | |
34ee731f | 472 | kmem_free(module, sizeof (kstat_module_t)); |
80093b6f AX |
473 | } |
474 | ||
04a479f7 | 475 | static int |
476 | proc_kstat_open(struct inode *inode, struct file *filp) | |
477 | { | |
34ee731f AX |
478 | struct seq_file *f; |
479 | int rc; | |
04a479f7 | 480 | |
34ee731f AX |
481 | rc = seq_open(filp, &kstat_seq_ops); |
482 | if (rc) | |
483 | return (rc); | |
04a479f7 | 484 | |
34ee731f AX |
485 | f = filp->private_data; |
486 | f->private = PDE_DATA(inode); | |
04a479f7 | 487 | |
34ee731f | 488 | return (rc); |
04a479f7 | 489 | } |
490 | ||
33a20369 | 491 | static ssize_t |
34ee731f AX |
492 | proc_kstat_write(struct file *filp, const char __user *buf, size_t len, |
493 | loff_t *ppos) | |
33a20369 LG |
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 = { |
33a20369 LG |
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 | ||
33a20369 LG |
520 | void |
521 | __kstat_set_raw_ops(kstat_t *ksp, | |
34ee731f AX |
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)) | |
33a20369 LG |
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, | |
34ee731f AX |
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); | |
04a479f7 | 542 | |
543 | if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO)) | |
34ee731f | 544 | ASSERT(ks_ndata == 1); |
04a479f7 | 545 | |
34ee731f | 546 | ksp = kmem_zalloc(sizeof (*ksp), KM_SLEEP); |
04a479f7 | 547 | if (ksp == NULL) |
34ee731f | 548 | return (ksp); |
04a479f7 | 549 | |
80093b6f | 550 | mutex_enter(&kstat_module_lock); |
04a479f7 | 551 | ksp->ks_kid = kstat_id; |
34ee731f | 552 | kstat_id++; |
80093b6f | 553 | mutex_exit(&kstat_module_lock); |
04a479f7 | 554 | |
34ee731f | 555 | ksp->ks_magic = KS_MAGIC; |
33a20369 LG |
556 | mutex_init(&ksp->ks_private_lock, NULL, MUTEX_DEFAULT, NULL); |
557 | ksp->ks_lock = &ksp->ks_private_lock; | |
04a479f7 | 558 | INIT_LIST_HEAD(&ksp->ks_list); |
559 | ||
560 | ksp->ks_crtime = gethrtime(); | |
34ee731f | 561 | ksp->ks_snaptime = ksp->ks_crtime; |
04a479f7 | 562 | strncpy(ksp->ks_module, ks_module, KSTAT_STRLEN); |
563 | ksp->ks_instance = ks_instance; | |
564 | strncpy(ksp->ks_name, ks_name, KSTAT_STRLEN); | |
565 | strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN); | |
566 | ksp->ks_type = ks_type; | |
567 | ksp->ks_flags = ks_flags; | |
9a8b7a74 BB |
568 | ksp->ks_update = kstat_default_update; |
569 | ksp->ks_private = NULL; | |
33a20369 LG |
570 | ksp->ks_raw_ops.headers = NULL; |
571 | ksp->ks_raw_ops.data = NULL; | |
572 | ksp->ks_raw_ops.addr = NULL; | |
573 | ksp->ks_raw_buf = NULL; | |
574 | ksp->ks_raw_bufsize = 0; | |
04a479f7 | 575 | |
576 | switch (ksp->ks_type) { | |
34ee731f AX |
577 | case KSTAT_TYPE_RAW: |
578 | ksp->ks_ndata = 1; | |
579 | ksp->ks_data_size = ks_ndata; | |
580 | break; | |
581 | case KSTAT_TYPE_NAMED: | |
582 | ksp->ks_ndata = ks_ndata; | |
583 | ksp->ks_data_size = ks_ndata * sizeof (kstat_named_t); | |
584 | break; | |
585 | case KSTAT_TYPE_INTR: | |
586 | ksp->ks_ndata = ks_ndata; | |
587 | ksp->ks_data_size = ks_ndata * sizeof (kstat_intr_t); | |
588 | break; | |
589 | case KSTAT_TYPE_IO: | |
590 | ksp->ks_ndata = ks_ndata; | |
591 | ksp->ks_data_size = ks_ndata * sizeof (kstat_io_t); | |
592 | break; | |
593 | case KSTAT_TYPE_TIMER: | |
594 | ksp->ks_ndata = ks_ndata; | |
595 | ksp->ks_data_size = ks_ndata * sizeof (kstat_timer_t); | |
596 | break; | |
597 | default: | |
598 | PANIC("Undefined kstat type %d\n", ksp->ks_type); | |
599 | } | |
04a479f7 | 600 | |
601 | if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) { | |
34ee731f AX |
602 | ksp->ks_data = NULL; |
603 | } else { | |
604 | ksp->ks_data = kmem_zalloc(ksp->ks_data_size, KM_SLEEP); | |
605 | if (ksp->ks_data == NULL) { | |
606 | kmem_free(ksp, sizeof (*ksp)); | |
607 | ksp = NULL; | |
608 | } | |
609 | } | |
610 | ||
611 | return (ksp); | |
04a479f7 | 612 | } |
613 | EXPORT_SYMBOL(__kstat_create); | |
614 | ||
ec06701b AX |
615 | static int |
616 | kstat_detect_collision(kstat_t *ksp) | |
617 | { | |
618 | kstat_module_t *module; | |
619 | kstat_t *tmp; | |
34ee731f | 620 | char *parent; |
ec06701b AX |
621 | char *cp; |
622 | ||
34ee731f | 623 | parent = kmem_asprintf("%s", ksp->ks_module); |
ec06701b | 624 | |
34ee731f AX |
625 | if ((cp = strrchr(parent, '/')) == NULL) { |
626 | strfree(parent); | |
ec06701b | 627 | return (0); |
34ee731f | 628 | } |
ec06701b AX |
629 | |
630 | cp[0] = '\0'; | |
631 | if ((module = kstat_find_module(parent)) != NULL) { | |
34ee731f AX |
632 | list_for_each_entry(tmp, &module->ksm_kstat_list, ks_list) { |
633 | if (strncmp(tmp->ks_name, cp+1, KSTAT_STRLEN) == 0) { | |
634 | strfree(parent); | |
ec06701b | 635 | return (EEXIST); |
34ee731f AX |
636 | } |
637 | } | |
ec06701b AX |
638 | } |
639 | ||
34ee731f | 640 | strfree(parent); |
ec06701b AX |
641 | return (0); |
642 | } | |
643 | ||
04a479f7 | 644 | void |
645 | __kstat_install(kstat_t *ksp) | |
646 | { | |
80093b6f | 647 | kstat_module_t *module; |
04a479f7 | 648 | kstat_t *tmp; |
04a479f7 | 649 | |
80093b6f | 650 | ASSERT(ksp); |
04a479f7 | 651 | |
80093b6f | 652 | mutex_enter(&kstat_module_lock); |
04a479f7 | 653 | |
80093b6f AX |
654 | module = kstat_find_module(ksp->ks_module); |
655 | if (module == NULL) { | |
ec06701b AX |
656 | if (kstat_detect_collision(ksp) != 0) { |
657 | cmn_err(CE_WARN, "kstat_create('%s', '%s'): namespace" \ | |
658 | " collision", ksp->ks_module, ksp->ks_name); | |
659 | goto out; | |
660 | } | |
80093b6f AX |
661 | module = kstat_create_module(ksp->ks_module); |
662 | if (module == NULL) | |
663 | goto out; | |
04a479f7 | 664 | } |
665 | ||
80093b6f AX |
666 | /* |
667 | * Only one entry by this name per-module, on failure the module | |
668 | * shouldn't be deleted because we know it has at least one entry. | |
669 | */ | |
34ee731f | 670 | list_for_each_entry(tmp, &module->ksm_kstat_list, ks_list) { |
80093b6f AX |
671 | if (strncmp(tmp->ks_name, ksp->ks_name, KSTAT_STRLEN) == 0) |
672 | goto out; | |
34ee731f | 673 | } |
80093b6f AX |
674 | |
675 | list_add_tail(&ksp->ks_list, &module->ksm_kstat_list); | |
04a479f7 | 676 | |
33a20369 | 677 | mutex_enter(ksp->ks_lock); |
80093b6f | 678 | ksp->ks_owner = module; |
33a20369 | 679 | ksp->ks_proc = proc_create_data(ksp->ks_name, 0644, |
80093b6f AX |
680 | module->ksm_proc, &proc_kstat_operations, (void *)ksp); |
681 | if (ksp->ks_proc == NULL) { | |
682 | list_del_init(&ksp->ks_list); | |
683 | if (list_empty(&module->ksm_kstat_list)) | |
684 | kstat_delete_module(module); | |
685 | } | |
33a20369 | 686 | mutex_exit(ksp->ks_lock); |
04a479f7 | 687 | out: |
80093b6f | 688 | mutex_exit(&kstat_module_lock); |
04a479f7 | 689 | } |
690 | EXPORT_SYMBOL(__kstat_install); | |
691 | ||
692 | void | |
693 | __kstat_delete(kstat_t *ksp) | |
694 | { | |
80093b6f | 695 | kstat_module_t *module = ksp->ks_owner; |
04a479f7 | 696 | |
80093b6f AX |
697 | mutex_enter(&kstat_module_lock); |
698 | list_del_init(&ksp->ks_list); | |
699 | mutex_exit(&kstat_module_lock); | |
04a479f7 | 700 | |
80093b6f AX |
701 | if (ksp->ks_proc) { |
702 | remove_proc_entry(ksp->ks_name, module->ksm_proc); | |
04a479f7 | 703 | |
80093b6f AX |
704 | /* Remove top level module directory if it's empty */ |
705 | if (list_empty(&module->ksm_kstat_list)) | |
706 | kstat_delete_module(module); | |
04a479f7 | 707 | } |
708 | ||
709 | if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL)) | |
80093b6f | 710 | kmem_free(ksp->ks_data, ksp->ks_data_size); |
04a479f7 | 711 | |
33a20369 LG |
712 | ksp->ks_lock = NULL; |
713 | mutex_destroy(&ksp->ks_private_lock); | |
34ee731f | 714 | kmem_free(ksp, sizeof (*ksp)); |
04a479f7 | 715 | } |
716 | EXPORT_SYMBOL(__kstat_delete); | |
717 | ||
04a479f7 | 718 | int |
1114ae6a | 719 | spl_kstat_init(void) |
04a479f7 | 720 | { |
80093b6f AX |
721 | mutex_init(&kstat_module_lock, NULL, MUTEX_DEFAULT, NULL); |
722 | INIT_LIST_HEAD(&kstat_module_list); | |
34ee731f | 723 | kstat_id = 0; |
10946b02 | 724 | return (0); |
04a479f7 | 725 | } |
726 | ||
727 | void | |
1114ae6a | 728 | spl_kstat_fini(void) |
04a479f7 | 729 | { |
80093b6f AX |
730 | ASSERT(list_empty(&kstat_module_list)); |
731 | mutex_destroy(&kstat_module_lock); | |
04a479f7 | 732 | } |