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/*
* Copyright (C) 2010 Max Matveev. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* Extract per-link network information via kstat.
*
* Link stats are in the sections called "link" and the stat name
* is the same as the link names */
#include <kstat.h>
#include "common.h"
int
netlink_fetch(pmdaMetric *pm, int inst, pmAtomValue *av)
{
char *lname;
metricdesc_t *md = pm->m_user;
kstat_t *k;
char *stat = (char *)md->md_offset;
if (pmdaCacheLookup(indomtab[NETLINK_INDOM].it_indom, inst, &lname,
(void **)&k) != PMDA_CACHE_ACTIVE)
return PM_ERR_INST;
if (k) {
kstat_named_t *kn = kstat_data_lookup(k, stat);
if (kn == NULL) {
fprintf(stderr, "No kstat called %s for %s\n", stat, lname);
return 0;
}
switch (pm->m_desc.type) {
case PM_TYPE_32:
if (kn->data_type == KSTAT_DATA_INT32) {
av->l = kn->value.i32;
return 1;
}
break;
case PM_TYPE_U32:
if (kn->data_type == KSTAT_DATA_UINT32) {
av->ul = kn->value.ui32;
return 1;
}
break;
case PM_TYPE_64:
if (kn->data_type == KSTAT_DATA_INT64) {
av->ll = kn->value.i64;
return 1;
}
break;
case PM_TYPE_U64:
if (kn->data_type == KSTAT_DATA_UINT64) {
av->ull = kn->value.ui64;
return 1;
}
break;
}
}
return 0;
}
void
netlink_update_stats(int fetch)
{
kstat_t *k;
kstat_ctl_t *kc;
pmInDom indom = indomtab[NETLINK_INDOM].it_indom;
if ((kc = kstat_ctl_update()) == NULL)
return;
for (k = kc->kc_chain; k != NULL; k = k->ks_next) {
if (strcmp(k->ks_module, "link") == 0) {
int rv;
kstat_t *cached;
if (pmdaCacheLookupName(indom, k->ks_name, &rv,
(void **)&cached) != PMDA_CACHE_ACTIVE) {
rv = pmdaCacheStore(indom, PMDA_CACHE_ADD, k->ks_name, k);
if (rv < 0) {
__pmNotifyErr(LOG_WARNING,
"Cannot create instance for "
"network link '%s': %s\n",
k->ks_name, pmErrStr(rv));
continue;
}
}
if (fetch)
kstat_read(kc, k, NULL);
}
}
}
void
netlink_refresh(void)
{
pmdaCacheOp(indomtab[NETLINK_INDOM].it_indom, PMDA_CACHE_INACTIVE);
netlink_update_stats(1);
pmdaCacheOp(indomtab[NETLINK_INDOM].it_indom, PMDA_CACHE_SAVE);
}
void
netlink_init(int first)
{
pmdaCacheOp(indomtab[NETLINK_INDOM].it_indom, PMDA_CACHE_LOAD);
netlink_update_stats(0);
pmdaCacheOp(indomtab[NETLINK_INDOM].it_indom, PMDA_CACHE_SAVE);
}
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