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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 BB |
8 | * This file is part of the SPL, Solaris Porting Layer. |
9 | * For details, see <http://github.com/behlendorf/spl/>. | |
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 BB |
28 | #include <sys/kstat.h> |
29 | #include <spl-debug.h> | |
04a479f7 | 30 | |
b17edc10 BB |
31 | #ifdef SS_DEBUG_SUBSYS |
32 | #undef SS_DEBUG_SUBSYS | |
33 | #endif | |
34 | ||
35 | #define SS_DEBUG_SUBSYS SS_KSTAT | |
36 | ||
04a479f7 BB |
37 | static spinlock_t kstat_lock; |
38 | static struct list_head kstat_list; | |
39 | static kid_t kstat_id; | |
40 | ||
41 | static void | |
42 | kstat_seq_show_headers(struct seq_file *f) | |
43 | { | |
44 | kstat_t *ksp = (kstat_t *)f->private; | |
45 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
46 | ||
47 | seq_printf(f, "%d %d 0x%02x %d %d %lld %lld\n", | |
48 | ksp->ks_kid, ksp->ks_type, ksp->ks_flags, | |
49 | ksp->ks_ndata, (int)ksp->ks_data_size, | |
50 | ksp->ks_crtime, ksp->ks_snaptime); | |
51 | ||
52 | switch (ksp->ks_type) { | |
53 | case KSTAT_TYPE_RAW: | |
54 | seq_printf(f, "raw data"); | |
55 | break; | |
56 | case KSTAT_TYPE_NAMED: | |
57 | seq_printf(f, "%-31s %-4s %s\n", | |
58 | "name", "type", "data"); | |
59 | break; | |
60 | case KSTAT_TYPE_INTR: | |
61 | seq_printf(f, "%-8s %-8s %-8s %-8s %-8s\n", | |
62 | "hard", "soft", "watchdog", | |
63 | "spurious", "multsvc"); | |
64 | break; | |
65 | case KSTAT_TYPE_IO: | |
66 | seq_printf(f, | |
67 | "%-8s %-8s %-8s %-8s %-8s %-8s " | |
68 | "%-8s %-8s %-8s %-8s %-8s %-8s\n", | |
69 | "nread", "nwritten", "reads", "writes", | |
70 | "wtime", "wlentime", "wupdate", | |
71 | "rtime", "rlentime", "rupdate", | |
72 | "wcnt", "rcnt"); | |
73 | break; | |
74 | case KSTAT_TYPE_TIMER: | |
75 | seq_printf(f, | |
76 | "%-31s %-8s " | |
77 | "%-8s %-8s %-8s %-8s %-8s\n", | |
78 | "name", "events", "elapsed", | |
79 | "min", "max", "start", "stop"); | |
80 | break; | |
81 | default: | |
55abb092 | 82 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 BB |
83 | } |
84 | } | |
85 | ||
86 | static int | |
87 | kstat_seq_show_raw(struct seq_file *f, unsigned char *p, int l) | |
88 | { | |
89 | int i, j; | |
90 | ||
91 | for (i = 0; ; i++) { | |
92 | seq_printf(f, "%03x:", i); | |
93 | ||
94 | for (j = 0; j < 16; j++) { | |
95 | if (i * 16 + j >= l) { | |
96 | seq_printf(f, "\n"); | |
97 | goto out; | |
98 | } | |
99 | ||
100 | seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]); | |
101 | } | |
102 | seq_printf(f, "\n"); | |
103 | } | |
104 | out: | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static int | |
109 | kstat_seq_show_named(struct seq_file *f, kstat_named_t *knp) | |
110 | { | |
111 | seq_printf(f, "%-31s %-4d ", knp->name, knp->data_type); | |
112 | ||
113 | switch (knp->data_type) { | |
114 | case KSTAT_DATA_CHAR: | |
115 | knp->value.c[15] = '\0'; /* NULL terminate */ | |
116 | seq_printf(f, "%-16s", knp->value.c); | |
117 | break; | |
118 | /* XXX - We need to be more careful able what tokens are | |
119 | * used for each arch, for now this is correct for x86_64. | |
120 | */ | |
121 | case KSTAT_DATA_INT32: | |
122 | seq_printf(f, "%d", knp->value.i32); | |
123 | break; | |
124 | case KSTAT_DATA_UINT32: | |
125 | seq_printf(f, "%u", knp->value.ui32); | |
126 | break; | |
127 | case KSTAT_DATA_INT64: | |
cfe57499 | 128 | seq_printf(f, "%lld", (signed long long)knp->value.i64); |
04a479f7 BB |
129 | break; |
130 | case KSTAT_DATA_UINT64: | |
cfe57499 | 131 | seq_printf(f, "%llu", (unsigned long long)knp->value.ui64); |
04a479f7 BB |
132 | break; |
133 | case KSTAT_DATA_LONG: | |
134 | seq_printf(f, "%ld", knp->value.l); | |
135 | break; | |
136 | case KSTAT_DATA_ULONG: | |
cfe57499 | 137 | seq_printf(f, "%lu", knp->value.ul); |
04a479f7 BB |
138 | break; |
139 | case KSTAT_DATA_STRING: | |
140 | KSTAT_NAMED_STR_PTR(knp) | |
141 | [KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0'; | |
142 | seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp)); | |
143 | break; | |
144 | default: | |
55abb092 | 145 | PANIC("Undefined kstat data type %d\n", knp->data_type); |
04a479f7 BB |
146 | } |
147 | ||
148 | seq_printf(f, "\n"); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int | |
154 | kstat_seq_show_intr(struct seq_file *f, kstat_intr_t *kip) | |
155 | { | |
156 | seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n", | |
157 | kip->intrs[KSTAT_INTR_HARD], | |
158 | kip->intrs[KSTAT_INTR_SOFT], | |
159 | kip->intrs[KSTAT_INTR_WATCHDOG], | |
160 | kip->intrs[KSTAT_INTR_SPURIOUS], | |
161 | kip->intrs[KSTAT_INTR_MULTSVC]); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static int | |
167 | kstat_seq_show_io(struct seq_file *f, kstat_io_t *kip) | |
168 | { | |
169 | seq_printf(f, | |
170 | "%-8llu %-8llu %-8u %-8u %-8lld %-8lld " | |
171 | "%-8lld %-8lld %-8lld %-8lld %-8u %-8u\n", | |
172 | kip->nread, kip->nwritten, | |
173 | kip->reads, kip->writes, | |
174 | kip->wtime, kip->wlentime, kip->wlastupdate, | |
175 | kip->rtime, kip->wlentime, kip->rlastupdate, | |
176 | kip->wcnt, kip->rcnt); | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | static int | |
182 | kstat_seq_show_timer(struct seq_file *f, kstat_timer_t *ktp) | |
183 | { | |
184 | seq_printf(f, | |
185 | "%-31s %-8llu %-8lld %-8lld %-8lld %-8lld %-8lld\n", | |
186 | ktp->name, ktp->num_events, ktp->elapsed_time, | |
187 | ktp->min_time, ktp->max_time, | |
188 | ktp->start_time, ktp->stop_time); | |
189 | ||
190 | return 0; | |
191 | } | |
192 | ||
193 | static int | |
194 | kstat_seq_show(struct seq_file *f, void *p) | |
195 | { | |
196 | kstat_t *ksp = (kstat_t *)f->private; | |
197 | int rc = 0; | |
198 | ||
199 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
200 | ||
201 | switch (ksp->ks_type) { | |
202 | case KSTAT_TYPE_RAW: | |
203 | ASSERT(ksp->ks_ndata == 1); | |
204 | rc = kstat_seq_show_raw(f, ksp->ks_data, | |
205 | ksp->ks_data_size); | |
206 | break; | |
207 | case KSTAT_TYPE_NAMED: | |
208 | rc = kstat_seq_show_named(f, (kstat_named_t *)p); | |
209 | break; | |
210 | case KSTAT_TYPE_INTR: | |
211 | rc = kstat_seq_show_intr(f, (kstat_intr_t *)p); | |
212 | break; | |
213 | case KSTAT_TYPE_IO: | |
214 | rc = kstat_seq_show_io(f, (kstat_io_t *)p); | |
215 | break; | |
216 | case KSTAT_TYPE_TIMER: | |
217 | rc = kstat_seq_show_timer(f, (kstat_timer_t *)p); | |
218 | break; | |
219 | default: | |
55abb092 | 220 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 BB |
221 | } |
222 | ||
223 | return rc; | |
224 | } | |
225 | ||
9a8b7a74 BB |
226 | int |
227 | kstat_default_update(kstat_t *ksp, int rw) | |
228 | { | |
229 | ASSERT(ksp != NULL); | |
230 | return 0; | |
231 | } | |
232 | ||
04a479f7 BB |
233 | static void * |
234 | kstat_seq_data_addr(kstat_t *ksp, loff_t n) | |
235 | { | |
236 | void *rc = NULL; | |
b17edc10 | 237 | SENTRY; |
04a479f7 BB |
238 | |
239 | switch (ksp->ks_type) { | |
240 | case KSTAT_TYPE_RAW: | |
241 | rc = ksp->ks_data; | |
242 | break; | |
243 | case KSTAT_TYPE_NAMED: | |
244 | rc = ksp->ks_data + n * sizeof(kstat_named_t); | |
245 | break; | |
246 | case KSTAT_TYPE_INTR: | |
247 | rc = ksp->ks_data + n * sizeof(kstat_intr_t); | |
248 | break; | |
249 | case KSTAT_TYPE_IO: | |
250 | rc = ksp->ks_data + n * sizeof(kstat_io_t); | |
251 | break; | |
252 | case KSTAT_TYPE_TIMER: | |
253 | rc = ksp->ks_data + n * sizeof(kstat_timer_t); | |
254 | break; | |
255 | default: | |
55abb092 | 256 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 BB |
257 | } |
258 | ||
b17edc10 | 259 | SRETURN(rc); |
04a479f7 BB |
260 | } |
261 | ||
262 | static void * | |
263 | kstat_seq_start(struct seq_file *f, loff_t *pos) | |
264 | { | |
265 | loff_t n = *pos; | |
266 | kstat_t *ksp = (kstat_t *)f->private; | |
267 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
b17edc10 | 268 | SENTRY; |
04a479f7 | 269 | |
9a8b7a74 BB |
270 | /* Dynamically update kstat, on error existing kstats are used */ |
271 | (void) ksp->ks_update(ksp, KSTAT_READ); | |
272 | ||
04a479f7 BB |
273 | spin_lock(&ksp->ks_lock); |
274 | ksp->ks_snaptime = gethrtime(); | |
275 | ||
276 | if (!n) | |
277 | kstat_seq_show_headers(f); | |
278 | ||
279 | if (n >= ksp->ks_ndata) | |
b17edc10 | 280 | SRETURN(NULL); |
04a479f7 | 281 | |
b17edc10 | 282 | SRETURN(kstat_seq_data_addr(ksp, n)); |
04a479f7 BB |
283 | } |
284 | ||
285 | static void * | |
286 | kstat_seq_next(struct seq_file *f, void *p, loff_t *pos) | |
287 | { | |
288 | kstat_t *ksp = (kstat_t *)f->private; | |
289 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
b17edc10 | 290 | SENTRY; |
04a479f7 BB |
291 | |
292 | ++*pos; | |
293 | if (*pos >= ksp->ks_ndata) | |
b17edc10 | 294 | SRETURN(NULL); |
04a479f7 | 295 | |
b17edc10 | 296 | SRETURN(kstat_seq_data_addr(ksp, *pos)); |
04a479f7 BB |
297 | } |
298 | ||
299 | static void | |
300 | kstat_seq_stop(struct seq_file *f, void *v) | |
301 | { | |
302 | kstat_t *ksp = (kstat_t *)f->private; | |
303 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
304 | ||
305 | spin_unlock(&ksp->ks_lock); | |
306 | } | |
307 | ||
308 | static struct seq_operations kstat_seq_ops = { | |
309 | .show = kstat_seq_show, | |
310 | .start = kstat_seq_start, | |
311 | .next = kstat_seq_next, | |
312 | .stop = kstat_seq_stop, | |
313 | }; | |
314 | ||
315 | static int | |
316 | proc_kstat_open(struct inode *inode, struct file *filp) | |
317 | { | |
318 | struct seq_file *f; | |
319 | int rc; | |
320 | ||
321 | rc = seq_open(filp, &kstat_seq_ops); | |
322 | if (rc) | |
323 | return rc; | |
324 | ||
325 | f = filp->private_data; | |
326 | f->private = PDE(inode)->data; | |
327 | ||
328 | return rc; | |
329 | } | |
330 | ||
331 | static struct file_operations proc_kstat_operations = { | |
332 | .open = proc_kstat_open, | |
333 | .read = seq_read, | |
334 | .llseek = seq_lseek, | |
335 | .release = seq_release, | |
336 | }; | |
337 | ||
338 | kstat_t * | |
339 | __kstat_create(const char *ks_module, int ks_instance, const char *ks_name, | |
340 | const char *ks_class, uchar_t ks_type, uint_t ks_ndata, | |
341 | uchar_t ks_flags) | |
342 | { | |
343 | kstat_t *ksp; | |
344 | ||
345 | ASSERT(ks_module); | |
346 | ASSERT(ks_instance == 0); | |
347 | ASSERT(ks_name); | |
348 | ASSERT(!(ks_flags & KSTAT_FLAG_UNSUPPORTED)); | |
349 | ||
350 | if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO)) | |
351 | ASSERT(ks_ndata == 1); | |
352 | ||
353 | ksp = kmem_zalloc(sizeof(*ksp), KM_SLEEP); | |
354 | if (ksp == NULL) | |
355 | return ksp; | |
356 | ||
357 | spin_lock(&kstat_lock); | |
358 | ksp->ks_kid = kstat_id; | |
359 | kstat_id++; | |
360 | spin_unlock(&kstat_lock); | |
361 | ||
362 | ksp->ks_magic = KS_MAGIC; | |
363 | spin_lock_init(&ksp->ks_lock); | |
364 | INIT_LIST_HEAD(&ksp->ks_list); | |
365 | ||
366 | ksp->ks_crtime = gethrtime(); | |
367 | ksp->ks_snaptime = ksp->ks_crtime; | |
368 | strncpy(ksp->ks_module, ks_module, KSTAT_STRLEN); | |
369 | ksp->ks_instance = ks_instance; | |
370 | strncpy(ksp->ks_name, ks_name, KSTAT_STRLEN); | |
371 | strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN); | |
372 | ksp->ks_type = ks_type; | |
373 | ksp->ks_flags = ks_flags; | |
9a8b7a74 BB |
374 | ksp->ks_update = kstat_default_update; |
375 | ksp->ks_private = NULL; | |
04a479f7 BB |
376 | |
377 | switch (ksp->ks_type) { | |
378 | case KSTAT_TYPE_RAW: | |
379 | ksp->ks_ndata = 1; | |
380 | ksp->ks_data_size = ks_ndata; | |
381 | break; | |
382 | case KSTAT_TYPE_NAMED: | |
383 | ksp->ks_ndata = ks_ndata; | |
384 | ksp->ks_data_size = ks_ndata * sizeof(kstat_named_t); | |
385 | break; | |
386 | case KSTAT_TYPE_INTR: | |
387 | ksp->ks_ndata = ks_ndata; | |
388 | ksp->ks_data_size = ks_ndata * sizeof(kstat_intr_t); | |
389 | break; | |
390 | case KSTAT_TYPE_IO: | |
391 | ksp->ks_ndata = ks_ndata; | |
392 | ksp->ks_data_size = ks_ndata * sizeof(kstat_io_t); | |
393 | break; | |
394 | case KSTAT_TYPE_TIMER: | |
395 | ksp->ks_ndata = ks_ndata; | |
396 | ksp->ks_data_size = ks_ndata * sizeof(kstat_timer_t); | |
397 | break; | |
398 | default: | |
55abb092 | 399 | PANIC("Undefined kstat type %d\n", ksp->ks_type); |
04a479f7 BB |
400 | } |
401 | ||
402 | if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) { | |
403 | ksp->ks_data = NULL; | |
404 | } else { | |
405 | ksp->ks_data = kmem_alloc(ksp->ks_data_size, KM_SLEEP); | |
406 | if (ksp->ks_data == NULL) { | |
407 | kmem_free(ksp, sizeof(*ksp)); | |
408 | ksp = NULL; | |
409 | } | |
410 | } | |
411 | ||
412 | return ksp; | |
413 | } | |
414 | EXPORT_SYMBOL(__kstat_create); | |
415 | ||
416 | void | |
417 | __kstat_install(kstat_t *ksp) | |
418 | { | |
419 | struct proc_dir_entry *de_module, *de_name; | |
420 | kstat_t *tmp; | |
421 | int rc = 0; | |
b17edc10 | 422 | SENTRY; |
04a479f7 BB |
423 | |
424 | spin_lock(&kstat_lock); | |
425 | ||
426 | /* Item may only be added to the list once */ | |
427 | list_for_each_entry(tmp, &kstat_list, ks_list) { | |
428 | if (tmp == ksp) { | |
429 | spin_unlock(&kstat_lock); | |
b17edc10 | 430 | SGOTO(out, rc = -EEXIST); |
04a479f7 BB |
431 | } |
432 | } | |
433 | ||
434 | list_add_tail(&ksp->ks_list, &kstat_list); | |
435 | spin_unlock(&kstat_lock); | |
436 | ||
c30df9c8 | 437 | de_module = proc_dir_entry_find(proc_spl_kstat, ksp->ks_module); |
04a479f7 | 438 | if (de_module == NULL) { |
c30df9c8 | 439 | de_module = proc_mkdir(ksp->ks_module, proc_spl_kstat); |
04a479f7 | 440 | if (de_module == NULL) |
b17edc10 | 441 | SGOTO(out, rc = -EUNATCH); |
04a479f7 BB |
442 | } |
443 | ||
444 | de_name = create_proc_entry(ksp->ks_name, 0444, de_module); | |
445 | if (de_name == NULL) | |
b17edc10 | 446 | SGOTO(out, rc = -EUNATCH); |
04a479f7 BB |
447 | |
448 | spin_lock(&ksp->ks_lock); | |
449 | ksp->ks_proc = de_name; | |
450 | de_name->proc_fops = &proc_kstat_operations; | |
451 | de_name->data = (void *)ksp; | |
452 | spin_unlock(&ksp->ks_lock); | |
453 | out: | |
454 | if (rc) { | |
455 | spin_lock(&kstat_lock); | |
456 | list_del_init(&ksp->ks_list); | |
457 | spin_unlock(&kstat_lock); | |
458 | } | |
459 | ||
b17edc10 | 460 | SEXIT; |
04a479f7 BB |
461 | } |
462 | EXPORT_SYMBOL(__kstat_install); | |
463 | ||
464 | void | |
465 | __kstat_delete(kstat_t *ksp) | |
466 | { | |
467 | struct proc_dir_entry *de_module; | |
468 | ||
469 | spin_lock(&kstat_lock); | |
470 | list_del_init(&ksp->ks_list); | |
471 | spin_unlock(&kstat_lock); | |
472 | ||
473 | if (ksp->ks_proc) { | |
474 | de_module = ksp->ks_proc->parent; | |
475 | remove_proc_entry(ksp->ks_name, de_module); | |
476 | ||
477 | /* Remove top level module directory if it's empty */ | |
478 | if (proc_dir_entries(de_module) == 0) | |
479 | remove_proc_entry(de_module->name, de_module->parent); | |
480 | } | |
481 | ||
482 | if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL)) | |
483 | kmem_free(ksp->ks_data, ksp->ks_data_size); | |
484 | ||
485 | kmem_free(ksp, sizeof(*ksp)); | |
486 | ||
487 | return; | |
488 | } | |
489 | EXPORT_SYMBOL(__kstat_delete); | |
490 | ||
04a479f7 | 491 | int |
1114ae6a | 492 | spl_kstat_init(void) |
04a479f7 | 493 | { |
b17edc10 | 494 | SENTRY; |
04a479f7 BB |
495 | spin_lock_init(&kstat_lock); |
496 | INIT_LIST_HEAD(&kstat_list); | |
497 | kstat_id = 0; | |
b17edc10 | 498 | SRETURN(0); |
04a479f7 BB |
499 | } |
500 | ||
501 | void | |
1114ae6a | 502 | spl_kstat_fini(void) |
04a479f7 | 503 | { |
b17edc10 | 504 | SENTRY; |
04a479f7 | 505 | ASSERT(list_empty(&kstat_list)); |
b17edc10 | 506 | SEXIT; |
04a479f7 BB |
507 | } |
508 |