2 * This file is part of the SPL: Solaris Porting Layer.
4 * Copyright (c) 2008 Lawrence Livermore National Security, LLC.
5 * Produced at Lawrence Livermore National Laboratory
7 * Brian Behlendorf <behlendorf1@llnl.gov>,
8 * Herb Wartens <wartens2@llnl.gov>,
9 * Jim Garlick <garlick@llnl.gov>
12 * This is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 #include <sys/kstat.h>
31 static spinlock_t kstat_lock
;
32 static struct list_head kstat_list
;
33 static kid_t kstat_id
;
36 kstat_seq_show_headers(struct seq_file
*f
)
38 kstat_t
*ksp
= (kstat_t
*)f
->private;
39 ASSERT(ksp
->ks_magic
== KS_MAGIC
);
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
);
46 switch (ksp
->ks_type
) {
48 seq_printf(f
, "raw data");
50 case KSTAT_TYPE_NAMED
:
51 seq_printf(f
, "%-31s %-4s %s\n",
52 "name", "type", "data");
55 seq_printf(f
, "%-8s %-8s %-8s %-8s %-8s\n",
56 "hard", "soft", "watchdog",
57 "spurious", "multsvc");
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",
68 case KSTAT_TYPE_TIMER
:
71 "%-8s %-8s %-8s %-8s %-8s\n",
72 "name", "events", "elapsed",
73 "min", "max", "start", "stop");
76 SBUG(); /* Unreachable */
81 kstat_seq_show_raw(struct seq_file
*f
, unsigned char *p
, int l
)
86 seq_printf(f
, "%03x:", i
);
88 for (j
= 0; j
< 16; j
++) {
89 if (i
* 16 + j
>= l
) {
94 seq_printf(f
, " %02x", (unsigned char)p
[i
* 16 + j
]);
103 kstat_seq_show_named(struct seq_file
*f
, kstat_named_t
*knp
)
105 seq_printf(f
, "%-31s %-4d ", knp
->name
, knp
->data_type
);
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
);
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.
115 case KSTAT_DATA_INT32
:
116 seq_printf(f
, "%d", knp
->value
.i32
);
118 case KSTAT_DATA_UINT32
:
119 seq_printf(f
, "%u", knp
->value
.ui32
);
121 case KSTAT_DATA_INT64
:
122 seq_printf(f
, "%lld", (signed long long)knp
->value
.i64
);
124 case KSTAT_DATA_UINT64
:
125 seq_printf(f
, "%llu", (unsigned long long)knp
->value
.ui64
);
127 case KSTAT_DATA_LONG
:
128 seq_printf(f
, "%ld", knp
->value
.l
);
130 case KSTAT_DATA_ULONG
:
131 seq_printf(f
, "%lu", knp
->value
.ul
);
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
));
139 SBUG(); /* Unreachable */
148 kstat_seq_show_intr(struct seq_file
*f
, kstat_intr_t
*kip
)
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
]);
161 kstat_seq_show_io(struct seq_file
*f
, kstat_io_t
*kip
)
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
);
176 kstat_seq_show_timer(struct seq_file
*f
, kstat_timer_t
*ktp
)
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
);
188 kstat_seq_show(struct seq_file
*f
, void *p
)
190 kstat_t
*ksp
= (kstat_t
*)f
->private;
193 ASSERT(ksp
->ks_magic
== KS_MAGIC
);
195 switch (ksp
->ks_type
) {
197 ASSERT(ksp
->ks_ndata
== 1);
198 rc
= kstat_seq_show_raw(f
, ksp
->ks_data
,
201 case KSTAT_TYPE_NAMED
:
202 rc
= kstat_seq_show_named(f
, (kstat_named_t
*)p
);
204 case KSTAT_TYPE_INTR
:
205 rc
= kstat_seq_show_intr(f
, (kstat_intr_t
*)p
);
208 rc
= kstat_seq_show_io(f
, (kstat_io_t
*)p
);
210 case KSTAT_TYPE_TIMER
:
211 rc
= kstat_seq_show_timer(f
, (kstat_timer_t
*)p
);
214 SBUG(); /* Unreachable */
221 kstat_seq_data_addr(kstat_t
*ksp
, loff_t n
)
226 switch (ksp
->ks_type
) {
230 case KSTAT_TYPE_NAMED
:
231 rc
= ksp
->ks_data
+ n
* sizeof(kstat_named_t
);
233 case KSTAT_TYPE_INTR
:
234 rc
= ksp
->ks_data
+ n
* sizeof(kstat_intr_t
);
237 rc
= ksp
->ks_data
+ n
* sizeof(kstat_io_t
);
239 case KSTAT_TYPE_TIMER
:
240 rc
= ksp
->ks_data
+ n
* sizeof(kstat_timer_t
);
243 SBUG(); /* Unreachable */
250 kstat_seq_start(struct seq_file
*f
, loff_t
*pos
)
253 kstat_t
*ksp
= (kstat_t
*)f
->private;
254 ASSERT(ksp
->ks_magic
== KS_MAGIC
);
257 spin_lock(&ksp
->ks_lock
);
258 ksp
->ks_snaptime
= gethrtime();
261 kstat_seq_show_headers(f
);
263 if (n
>= ksp
->ks_ndata
)
266 RETURN(kstat_seq_data_addr(ksp
, n
));
270 kstat_seq_next(struct seq_file
*f
, void *p
, loff_t
*pos
)
272 kstat_t
*ksp
= (kstat_t
*)f
->private;
273 ASSERT(ksp
->ks_magic
== KS_MAGIC
);
277 if (*pos
>= ksp
->ks_ndata
)
280 RETURN(kstat_seq_data_addr(ksp
, *pos
));
284 kstat_seq_stop(struct seq_file
*f
, void *v
)
286 kstat_t
*ksp
= (kstat_t
*)f
->private;
287 ASSERT(ksp
->ks_magic
== KS_MAGIC
);
289 spin_unlock(&ksp
->ks_lock
);
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
,
300 proc_kstat_open(struct inode
*inode
, struct file
*filp
)
305 rc
= seq_open(filp
, &kstat_seq_ops
);
309 f
= filp
->private_data
;
310 f
->private = PDE(inode
)->data
;
315 static struct file_operations proc_kstat_operations
= {
316 .open
= proc_kstat_open
,
319 .release
= seq_release
,
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
,
330 ASSERT(ks_instance
== 0);
332 ASSERT(!(ks_flags
& KSTAT_FLAG_UNSUPPORTED
));
334 if ((ks_type
== KSTAT_TYPE_INTR
) || (ks_type
== KSTAT_TYPE_IO
))
335 ASSERT(ks_ndata
== 1);
337 ksp
= kmem_zalloc(sizeof(*ksp
), KM_SLEEP
);
341 spin_lock(&kstat_lock
);
342 ksp
->ks_kid
= kstat_id
;
344 spin_unlock(&kstat_lock
);
346 ksp
->ks_magic
= KS_MAGIC
;
347 spin_lock_init(&ksp
->ks_lock
);
348 INIT_LIST_HEAD(&ksp
->ks_list
);
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
;
359 switch (ksp
->ks_type
) {
362 ksp
->ks_data_size
= ks_ndata
;
364 case KSTAT_TYPE_NAMED
:
365 ksp
->ks_ndata
= ks_ndata
;
366 ksp
->ks_data_size
= ks_ndata
* sizeof(kstat_named_t
);
368 case KSTAT_TYPE_INTR
:
369 ksp
->ks_ndata
= ks_ndata
;
370 ksp
->ks_data_size
= ks_ndata
* sizeof(kstat_intr_t
);
373 ksp
->ks_ndata
= ks_ndata
;
374 ksp
->ks_data_size
= ks_ndata
* sizeof(kstat_io_t
);
376 case KSTAT_TYPE_TIMER
:
377 ksp
->ks_ndata
= ks_ndata
;
378 ksp
->ks_data_size
= ks_ndata
* sizeof(kstat_timer_t
);
381 SBUG(); /* Unreachable */
384 if (ksp
->ks_flags
& KSTAT_FLAG_VIRTUAL
) {
387 ksp
->ks_data
= kmem_alloc(ksp
->ks_data_size
, KM_SLEEP
);
388 if (ksp
->ks_data
== NULL
) {
389 kmem_free(ksp
, sizeof(*ksp
));
396 EXPORT_SYMBOL(__kstat_create
);
399 __kstat_install(kstat_t
*ksp
)
401 struct proc_dir_entry
*de_module
, *de_name
;
406 spin_lock(&kstat_lock
);
408 /* Item may only be added to the list once */
409 list_for_each_entry(tmp
, &kstat_list
, ks_list
) {
411 spin_unlock(&kstat_lock
);
412 GOTO(out
, rc
= -EEXIST
);
416 list_add_tail(&ksp
->ks_list
, &kstat_list
);
417 spin_unlock(&kstat_lock
);
419 de_module
= proc_dir_entry_find(proc_spl_kstat
, ksp
->ks_module
);
420 if (de_module
== NULL
) {
421 de_module
= proc_mkdir(ksp
->ks_module
, proc_spl_kstat
);
422 if (de_module
== NULL
)
423 GOTO(out
, rc
= -EUNATCH
);
426 de_name
= create_proc_entry(ksp
->ks_name
, 0444, de_module
);
428 GOTO(out
, rc
= -EUNATCH
);
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
);
437 spin_lock(&kstat_lock
);
438 list_del_init(&ksp
->ks_list
);
439 spin_unlock(&kstat_lock
);
444 EXPORT_SYMBOL(__kstat_install
);
447 __kstat_delete(kstat_t
*ksp
)
449 struct proc_dir_entry
*de_module
;
451 spin_lock(&kstat_lock
);
452 list_del_init(&ksp
->ks_list
);
453 spin_unlock(&kstat_lock
);
456 de_module
= ksp
->ks_proc
->parent
;
457 remove_proc_entry(ksp
->ks_name
, de_module
);
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
);
464 if (!(ksp
->ks_flags
& KSTAT_FLAG_VIRTUAL
))
465 kmem_free(ksp
->ks_data
, ksp
->ks_data_size
);
467 kmem_free(ksp
, sizeof(*ksp
));
471 EXPORT_SYMBOL(__kstat_delete
);
473 #endif /* DEBUG_KSTAT */
480 spin_lock_init(&kstat_lock
);
481 INIT_LIST_HEAD(&kstat_list
);
483 #endif /* DEBUG_KSTAT */
492 ASSERT(list_empty(&kstat_list
));
493 #endif /* DEBUG_KSTAT */