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