132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/*-
|
|
* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/kstat.h>
|
|
|
|
static MALLOC_DEFINE(M_KSTAT, "kstat_data", "Kernel statistics");
|
|
|
|
SYSCTL_ROOT_NODE(OID_AUTO, kstat, CTLFLAG_RW, 0, "Kernel statistics");
|
|
|
|
kstat_t *
|
|
kstat_create(char *module, int instance, char *name, char *class, uchar_t type,
|
|
ulong_t ndata, uchar_t flags)
|
|
{
|
|
struct sysctl_oid *root;
|
|
kstat_t *ksp;
|
|
|
|
KASSERT(instance == 0, ("instance=%d", instance));
|
|
KASSERT(type == KSTAT_TYPE_NAMED, ("type=%hhu", type));
|
|
KASSERT(flags == KSTAT_FLAG_VIRTUAL, ("flags=%02hhx", flags));
|
|
|
|
/*
|
|
* Allocate the main structure. We don't need to copy module/class/name
|
|
* stuff in here, because it is only used for sysctl node creation
|
|
* done in this function.
|
|
*/
|
|
ksp = malloc(sizeof(*ksp), M_KSTAT, M_WAITOK);
|
|
ksp->ks_ndata = ndata;
|
|
|
|
/*
|
|
* Create sysctl tree for those statistics:
|
|
*
|
|
* kstat.<module>.<class>.<name>.
|
|
*/
|
|
sysctl_ctx_init(&ksp->ks_sysctl_ctx);
|
|
root = SYSCTL_ADD_NODE(&ksp->ks_sysctl_ctx,
|
|
SYSCTL_STATIC_CHILDREN(_kstat), OID_AUTO, module, CTLFLAG_RW, 0,
|
|
"");
|
|
if (root == NULL) {
|
|
printf("%s: Cannot create kstat.%s tree!\n", __func__, module);
|
|
sysctl_ctx_free(&ksp->ks_sysctl_ctx);
|
|
free(ksp, M_KSTAT);
|
|
return (NULL);
|
|
}
|
|
root = SYSCTL_ADD_NODE(&ksp->ks_sysctl_ctx, SYSCTL_CHILDREN(root),
|
|
OID_AUTO, class, CTLFLAG_RW, 0, "");
|
|
if (root == NULL) {
|
|
printf("%s: Cannot create kstat.%s.%s tree!\n", __func__,
|
|
module, class);
|
|
sysctl_ctx_free(&ksp->ks_sysctl_ctx);
|
|
free(ksp, M_KSTAT);
|
|
return (NULL);
|
|
}
|
|
root = SYSCTL_ADD_NODE(&ksp->ks_sysctl_ctx, SYSCTL_CHILDREN(root),
|
|
OID_AUTO, name, CTLFLAG_RW, 0, "");
|
|
if (root == NULL) {
|
|
printf("%s: Cannot create kstat.%s.%s.%s tree!\n", __func__,
|
|
module, class, name);
|
|
sysctl_ctx_free(&ksp->ks_sysctl_ctx);
|
|
free(ksp, M_KSTAT);
|
|
return (NULL);
|
|
}
|
|
ksp->ks_sysctl_root = root;
|
|
|
|
return (ksp);
|
|
}
|
|
|
|
static int
|
|
kstat_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
kstat_named_t *ksent = arg1;
|
|
uint64_t val;
|
|
|
|
val = ksent->value.ui64;
|
|
return sysctl_handle_64(oidp, &val, 0, req);
|
|
}
|
|
|
|
void
|
|
kstat_install(kstat_t *ksp)
|
|
{
|
|
kstat_named_t *ksent;
|
|
u_int i;
|
|
|
|
ksent = ksp->ks_data;
|
|
for (i = 0; i < ksp->ks_ndata; i++, ksent++) {
|
|
KASSERT(ksent->data_type == KSTAT_DATA_UINT64,
|
|
("data_type=%d", ksent->data_type));
|
|
SYSCTL_ADD_PROC(&ksp->ks_sysctl_ctx,
|
|
SYSCTL_CHILDREN(ksp->ks_sysctl_root), OID_AUTO, ksent->name,
|
|
CTLTYPE_U64 | CTLFLAG_RD, ksent, sizeof(*ksent),
|
|
kstat_sysctl, "QU", ksent->desc);
|
|
}
|
|
}
|
|
|
|
void
|
|
kstat_delete(kstat_t *ksp)
|
|
{
|
|
|
|
sysctl_ctx_free(&ksp->ks_sysctl_ctx);
|
|
free(ksp, M_KSTAT);
|
|
}
|