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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 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 | |
04a479f7 | 27 | #include <sys/kstat.h> |
ae4c36ad | 28 | #include <linux/seq_file.h> |
04a479f7 | 29 | |
04a479f7 BB |
30 | static spinlock_t kstat_lock; |
31 | static struct list_head kstat_list; | |
32 | static kid_t kstat_id; | |
33 | ||
34 | static void | |
35 | kstat_seq_show_headers(struct seq_file *f) | |
36 | { | |
37 | kstat_t *ksp = (kstat_t *)f->private; | |
38 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
39 | ||
40 | seq_printf(f, "%d %d 0x%02x %d %d %lld %lld\n", | |
41 | ksp->ks_kid, ksp->ks_type, ksp->ks_flags, | |
42 | ksp->ks_ndata, (int)ksp->ks_data_size, | |
43 | ksp->ks_crtime, ksp->ks_snaptime); | |
44 | ||
45 | switch (ksp->ks_type) { | |
46 | case KSTAT_TYPE_RAW: | |
47 | seq_printf(f, "raw data"); | |
48 | break; | |
49 | case KSTAT_TYPE_NAMED: | |
50 | seq_printf(f, "%-31s %-4s %s\n", | |
51 | "name", "type", "data"); | |
52 | break; | |
53 | case KSTAT_TYPE_INTR: | |
54 | seq_printf(f, "%-8s %-8s %-8s %-8s %-8s\n", | |
55 | "hard", "soft", "watchdog", | |
56 | "spurious", "multsvc"); | |
57 | break; | |
58 | case KSTAT_TYPE_IO: | |
59 | seq_printf(f, | |
60 | "%-8s %-8s %-8s %-8s %-8s %-8s " | |
61 | "%-8s %-8s %-8s %-8s %-8s %-8s\n", | |
62 | "nread", "nwritten", "reads", "writes", | |
63 | "wtime", "wlentime", "wupdate", | |
64 | "rtime", "rlentime", "rupdate", | |
65 | "wcnt", "rcnt"); | |
66 | break; | |
67 | case KSTAT_TYPE_TIMER: | |
68 | seq_printf(f, | |
69 | "%-31s %-8s " | |
70 | "%-8s %-8s %-8s %-8s %-8s\n", | |
71 | "name", "events", "elapsed", | |
72 | "min", "max", "start", "stop"); | |
73 | break; | |
74 | default: | |
75 | SBUG(); /* Unreachable */ | |
76 | } | |
77 | } | |
78 | ||
79 | static int | |
80 | kstat_seq_show_raw(struct seq_file *f, unsigned char *p, int l) | |
81 | { | |
82 | int i, j; | |
83 | ||
84 | for (i = 0; ; i++) { | |
85 | seq_printf(f, "%03x:", i); | |
86 | ||
87 | for (j = 0; j < 16; j++) { | |
88 | if (i * 16 + j >= l) { | |
89 | seq_printf(f, "\n"); | |
90 | goto out; | |
91 | } | |
92 | ||
93 | seq_printf(f, " %02x", (unsigned char)p[i * 16 + j]); | |
94 | } | |
95 | seq_printf(f, "\n"); | |
96 | } | |
97 | out: | |
98 | return 0; | |
99 | } | |
100 | ||
101 | static int | |
102 | kstat_seq_show_named(struct seq_file *f, kstat_named_t *knp) | |
103 | { | |
104 | seq_printf(f, "%-31s %-4d ", knp->name, knp->data_type); | |
105 | ||
106 | switch (knp->data_type) { | |
107 | case KSTAT_DATA_CHAR: | |
108 | knp->value.c[15] = '\0'; /* NULL terminate */ | |
109 | seq_printf(f, "%-16s", knp->value.c); | |
110 | break; | |
111 | /* XXX - We need to be more careful able what tokens are | |
112 | * used for each arch, for now this is correct for x86_64. | |
113 | */ | |
114 | case KSTAT_DATA_INT32: | |
115 | seq_printf(f, "%d", knp->value.i32); | |
116 | break; | |
117 | case KSTAT_DATA_UINT32: | |
118 | seq_printf(f, "%u", knp->value.ui32); | |
119 | break; | |
120 | case KSTAT_DATA_INT64: | |
cfe57499 | 121 | seq_printf(f, "%lld", (signed long long)knp->value.i64); |
04a479f7 BB |
122 | break; |
123 | case KSTAT_DATA_UINT64: | |
cfe57499 | 124 | seq_printf(f, "%llu", (unsigned long long)knp->value.ui64); |
04a479f7 BB |
125 | break; |
126 | case KSTAT_DATA_LONG: | |
127 | seq_printf(f, "%ld", knp->value.l); | |
128 | break; | |
129 | case KSTAT_DATA_ULONG: | |
cfe57499 | 130 | seq_printf(f, "%lu", knp->value.ul); |
04a479f7 BB |
131 | break; |
132 | case KSTAT_DATA_STRING: | |
133 | KSTAT_NAMED_STR_PTR(knp) | |
134 | [KSTAT_NAMED_STR_BUFLEN(knp)-1] = '\0'; | |
135 | seq_printf(f, "%s", KSTAT_NAMED_STR_PTR(knp)); | |
136 | break; | |
137 | default: | |
138 | SBUG(); /* Unreachable */ | |
139 | } | |
140 | ||
141 | seq_printf(f, "\n"); | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static int | |
147 | kstat_seq_show_intr(struct seq_file *f, kstat_intr_t *kip) | |
148 | { | |
149 | seq_printf(f, "%-8u %-8u %-8u %-8u %-8u\n", | |
150 | kip->intrs[KSTAT_INTR_HARD], | |
151 | kip->intrs[KSTAT_INTR_SOFT], | |
152 | kip->intrs[KSTAT_INTR_WATCHDOG], | |
153 | kip->intrs[KSTAT_INTR_SPURIOUS], | |
154 | kip->intrs[KSTAT_INTR_MULTSVC]); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static int | |
160 | kstat_seq_show_io(struct seq_file *f, kstat_io_t *kip) | |
161 | { | |
162 | seq_printf(f, | |
163 | "%-8llu %-8llu %-8u %-8u %-8lld %-8lld " | |
164 | "%-8lld %-8lld %-8lld %-8lld %-8u %-8u\n", | |
165 | kip->nread, kip->nwritten, | |
166 | kip->reads, kip->writes, | |
167 | kip->wtime, kip->wlentime, kip->wlastupdate, | |
168 | kip->rtime, kip->wlentime, kip->rlastupdate, | |
169 | kip->wcnt, kip->rcnt); | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static int | |
175 | kstat_seq_show_timer(struct seq_file *f, kstat_timer_t *ktp) | |
176 | { | |
177 | seq_printf(f, | |
178 | "%-31s %-8llu %-8lld %-8lld %-8lld %-8lld %-8lld\n", | |
179 | ktp->name, ktp->num_events, ktp->elapsed_time, | |
180 | ktp->min_time, ktp->max_time, | |
181 | ktp->start_time, ktp->stop_time); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | static int | |
187 | kstat_seq_show(struct seq_file *f, void *p) | |
188 | { | |
189 | kstat_t *ksp = (kstat_t *)f->private; | |
190 | int rc = 0; | |
191 | ||
192 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
193 | ||
194 | switch (ksp->ks_type) { | |
195 | case KSTAT_TYPE_RAW: | |
196 | ASSERT(ksp->ks_ndata == 1); | |
197 | rc = kstat_seq_show_raw(f, ksp->ks_data, | |
198 | ksp->ks_data_size); | |
199 | break; | |
200 | case KSTAT_TYPE_NAMED: | |
201 | rc = kstat_seq_show_named(f, (kstat_named_t *)p); | |
202 | break; | |
203 | case KSTAT_TYPE_INTR: | |
204 | rc = kstat_seq_show_intr(f, (kstat_intr_t *)p); | |
205 | break; | |
206 | case KSTAT_TYPE_IO: | |
207 | rc = kstat_seq_show_io(f, (kstat_io_t *)p); | |
208 | break; | |
209 | case KSTAT_TYPE_TIMER: | |
210 | rc = kstat_seq_show_timer(f, (kstat_timer_t *)p); | |
211 | break; | |
212 | default: | |
213 | SBUG(); /* Unreachable */ | |
214 | } | |
215 | ||
216 | return rc; | |
217 | } | |
218 | ||
219 | static void * | |
220 | kstat_seq_data_addr(kstat_t *ksp, loff_t n) | |
221 | { | |
222 | void *rc = NULL; | |
223 | ENTRY; | |
224 | ||
225 | switch (ksp->ks_type) { | |
226 | case KSTAT_TYPE_RAW: | |
227 | rc = ksp->ks_data; | |
228 | break; | |
229 | case KSTAT_TYPE_NAMED: | |
230 | rc = ksp->ks_data + n * sizeof(kstat_named_t); | |
231 | break; | |
232 | case KSTAT_TYPE_INTR: | |
233 | rc = ksp->ks_data + n * sizeof(kstat_intr_t); | |
234 | break; | |
235 | case KSTAT_TYPE_IO: | |
236 | rc = ksp->ks_data + n * sizeof(kstat_io_t); | |
237 | break; | |
238 | case KSTAT_TYPE_TIMER: | |
239 | rc = ksp->ks_data + n * sizeof(kstat_timer_t); | |
240 | break; | |
241 | default: | |
242 | SBUG(); /* Unreachable */ | |
243 | } | |
244 | ||
245 | RETURN(rc); | |
246 | } | |
247 | ||
248 | static void * | |
249 | kstat_seq_start(struct seq_file *f, loff_t *pos) | |
250 | { | |
251 | loff_t n = *pos; | |
252 | kstat_t *ksp = (kstat_t *)f->private; | |
253 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
254 | ENTRY; | |
255 | ||
256 | spin_lock(&ksp->ks_lock); | |
257 | ksp->ks_snaptime = gethrtime(); | |
258 | ||
259 | if (!n) | |
260 | kstat_seq_show_headers(f); | |
261 | ||
262 | if (n >= ksp->ks_ndata) | |
263 | RETURN(NULL); | |
264 | ||
265 | RETURN(kstat_seq_data_addr(ksp, n)); | |
266 | } | |
267 | ||
268 | static void * | |
269 | kstat_seq_next(struct seq_file *f, void *p, loff_t *pos) | |
270 | { | |
271 | kstat_t *ksp = (kstat_t *)f->private; | |
272 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
273 | ENTRY; | |
274 | ||
275 | ++*pos; | |
276 | if (*pos >= ksp->ks_ndata) | |
277 | RETURN(NULL); | |
278 | ||
279 | RETURN(kstat_seq_data_addr(ksp, *pos)); | |
280 | } | |
281 | ||
282 | static void | |
283 | kstat_seq_stop(struct seq_file *f, void *v) | |
284 | { | |
285 | kstat_t *ksp = (kstat_t *)f->private; | |
286 | ASSERT(ksp->ks_magic == KS_MAGIC); | |
287 | ||
288 | spin_unlock(&ksp->ks_lock); | |
289 | } | |
290 | ||
291 | static struct seq_operations kstat_seq_ops = { | |
292 | .show = kstat_seq_show, | |
293 | .start = kstat_seq_start, | |
294 | .next = kstat_seq_next, | |
295 | .stop = kstat_seq_stop, | |
296 | }; | |
297 | ||
298 | static int | |
299 | proc_kstat_open(struct inode *inode, struct file *filp) | |
300 | { | |
301 | struct seq_file *f; | |
302 | int rc; | |
303 | ||
304 | rc = seq_open(filp, &kstat_seq_ops); | |
305 | if (rc) | |
306 | return rc; | |
307 | ||
308 | f = filp->private_data; | |
309 | f->private = PDE(inode)->data; | |
310 | ||
311 | return rc; | |
312 | } | |
313 | ||
314 | static struct file_operations proc_kstat_operations = { | |
315 | .open = proc_kstat_open, | |
316 | .read = seq_read, | |
317 | .llseek = seq_lseek, | |
318 | .release = seq_release, | |
319 | }; | |
320 | ||
321 | kstat_t * | |
322 | __kstat_create(const char *ks_module, int ks_instance, const char *ks_name, | |
323 | const char *ks_class, uchar_t ks_type, uint_t ks_ndata, | |
324 | uchar_t ks_flags) | |
325 | { | |
326 | kstat_t *ksp; | |
327 | ||
328 | ASSERT(ks_module); | |
329 | ASSERT(ks_instance == 0); | |
330 | ASSERT(ks_name); | |
331 | ASSERT(!(ks_flags & KSTAT_FLAG_UNSUPPORTED)); | |
332 | ||
333 | if ((ks_type == KSTAT_TYPE_INTR) || (ks_type == KSTAT_TYPE_IO)) | |
334 | ASSERT(ks_ndata == 1); | |
335 | ||
336 | ksp = kmem_zalloc(sizeof(*ksp), KM_SLEEP); | |
337 | if (ksp == NULL) | |
338 | return ksp; | |
339 | ||
340 | spin_lock(&kstat_lock); | |
341 | ksp->ks_kid = kstat_id; | |
342 | kstat_id++; | |
343 | spin_unlock(&kstat_lock); | |
344 | ||
345 | ksp->ks_magic = KS_MAGIC; | |
346 | spin_lock_init(&ksp->ks_lock); | |
347 | INIT_LIST_HEAD(&ksp->ks_list); | |
348 | ||
349 | ksp->ks_crtime = gethrtime(); | |
350 | ksp->ks_snaptime = ksp->ks_crtime; | |
351 | strncpy(ksp->ks_module, ks_module, KSTAT_STRLEN); | |
352 | ksp->ks_instance = ks_instance; | |
353 | strncpy(ksp->ks_name, ks_name, KSTAT_STRLEN); | |
354 | strncpy(ksp->ks_class, ks_class, KSTAT_STRLEN); | |
355 | ksp->ks_type = ks_type; | |
356 | ksp->ks_flags = ks_flags; | |
357 | ||
358 | switch (ksp->ks_type) { | |
359 | case KSTAT_TYPE_RAW: | |
360 | ksp->ks_ndata = 1; | |
361 | ksp->ks_data_size = ks_ndata; | |
362 | break; | |
363 | case KSTAT_TYPE_NAMED: | |
364 | ksp->ks_ndata = ks_ndata; | |
365 | ksp->ks_data_size = ks_ndata * sizeof(kstat_named_t); | |
366 | break; | |
367 | case KSTAT_TYPE_INTR: | |
368 | ksp->ks_ndata = ks_ndata; | |
369 | ksp->ks_data_size = ks_ndata * sizeof(kstat_intr_t); | |
370 | break; | |
371 | case KSTAT_TYPE_IO: | |
372 | ksp->ks_ndata = ks_ndata; | |
373 | ksp->ks_data_size = ks_ndata * sizeof(kstat_io_t); | |
374 | break; | |
375 | case KSTAT_TYPE_TIMER: | |
376 | ksp->ks_ndata = ks_ndata; | |
377 | ksp->ks_data_size = ks_ndata * sizeof(kstat_timer_t); | |
378 | break; | |
379 | default: | |
380 | SBUG(); /* Unreachable */ | |
381 | } | |
382 | ||
383 | if (ksp->ks_flags & KSTAT_FLAG_VIRTUAL) { | |
384 | ksp->ks_data = NULL; | |
385 | } else { | |
386 | ksp->ks_data = kmem_alloc(ksp->ks_data_size, KM_SLEEP); | |
387 | if (ksp->ks_data == NULL) { | |
388 | kmem_free(ksp, sizeof(*ksp)); | |
389 | ksp = NULL; | |
390 | } | |
391 | } | |
392 | ||
393 | return ksp; | |
394 | } | |
395 | EXPORT_SYMBOL(__kstat_create); | |
396 | ||
397 | void | |
398 | __kstat_install(kstat_t *ksp) | |
399 | { | |
400 | struct proc_dir_entry *de_module, *de_name; | |
401 | kstat_t *tmp; | |
402 | int rc = 0; | |
403 | ENTRY; | |
404 | ||
405 | spin_lock(&kstat_lock); | |
406 | ||
407 | /* Item may only be added to the list once */ | |
408 | list_for_each_entry(tmp, &kstat_list, ks_list) { | |
409 | if (tmp == ksp) { | |
410 | spin_unlock(&kstat_lock); | |
411 | GOTO(out, rc = -EEXIST); | |
412 | } | |
413 | } | |
414 | ||
415 | list_add_tail(&ksp->ks_list, &kstat_list); | |
416 | spin_unlock(&kstat_lock); | |
417 | ||
c30df9c8 | 418 | de_module = proc_dir_entry_find(proc_spl_kstat, ksp->ks_module); |
04a479f7 | 419 | if (de_module == NULL) { |
c30df9c8 | 420 | de_module = proc_mkdir(ksp->ks_module, proc_spl_kstat); |
04a479f7 BB |
421 | if (de_module == NULL) |
422 | GOTO(out, rc = -EUNATCH); | |
423 | } | |
424 | ||
425 | de_name = create_proc_entry(ksp->ks_name, 0444, de_module); | |
426 | if (de_name == NULL) | |
427 | GOTO(out, rc = -EUNATCH); | |
428 | ||
429 | spin_lock(&ksp->ks_lock); | |
430 | ksp->ks_proc = de_name; | |
431 | de_name->proc_fops = &proc_kstat_operations; | |
432 | de_name->data = (void *)ksp; | |
433 | spin_unlock(&ksp->ks_lock); | |
434 | out: | |
435 | if (rc) { | |
436 | spin_lock(&kstat_lock); | |
437 | list_del_init(&ksp->ks_list); | |
438 | spin_unlock(&kstat_lock); | |
439 | } | |
440 | ||
441 | EXIT; | |
442 | } | |
443 | EXPORT_SYMBOL(__kstat_install); | |
444 | ||
445 | void | |
446 | __kstat_delete(kstat_t *ksp) | |
447 | { | |
448 | struct proc_dir_entry *de_module; | |
449 | ||
450 | spin_lock(&kstat_lock); | |
451 | list_del_init(&ksp->ks_list); | |
452 | spin_unlock(&kstat_lock); | |
453 | ||
454 | if (ksp->ks_proc) { | |
455 | de_module = ksp->ks_proc->parent; | |
456 | remove_proc_entry(ksp->ks_name, de_module); | |
457 | ||
458 | /* Remove top level module directory if it's empty */ | |
459 | if (proc_dir_entries(de_module) == 0) | |
460 | remove_proc_entry(de_module->name, de_module->parent); | |
461 | } | |
462 | ||
463 | if (!(ksp->ks_flags & KSTAT_FLAG_VIRTUAL)) | |
464 | kmem_free(ksp->ks_data, ksp->ks_data_size); | |
465 | ||
466 | kmem_free(ksp, sizeof(*ksp)); | |
467 | ||
468 | return; | |
469 | } | |
470 | EXPORT_SYMBOL(__kstat_delete); | |
471 | ||
04a479f7 BB |
472 | int |
473 | kstat_init(void) | |
474 | { | |
475 | ENTRY; | |
04a479f7 BB |
476 | spin_lock_init(&kstat_lock); |
477 | INIT_LIST_HEAD(&kstat_list); | |
478 | kstat_id = 0; | |
04a479f7 BB |
479 | RETURN(0); |
480 | } | |
481 | ||
482 | void | |
483 | kstat_fini(void) | |
484 | { | |
485 | ENTRY; | |
04a479f7 | 486 | ASSERT(list_empty(&kstat_list)); |
04a479f7 BB |
487 | EXIT; |
488 | } | |
489 |